//--------------------------------------------------------------------------
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//--------------------------------------------------------------------------
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// This is the property of PERFTRENDS TECHNOLOGIES PRIVATE LIMITED and
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// This is the property of PERFTRENDS TECHNOLOGIES PRIVATE LIMITED and
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// possession or use of file has to be with the written LICENCE AGGREMENT
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// possession or use of file has to be with the written LICENCE AGGREMENT
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// from PERFTRENDS TECHNOLOGIES PRIVATE LIMITED.
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// from PERFTRENDS TECHNOLOGIES PRIVATE LIMITED.
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//
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//
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//--------------------------------------------------------------------------
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//--------------------------------------------------------------------------
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//
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//
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// Project : ATMEL Data Flash Device
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// Project : ATMEL Data Flash Device
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//--------------------------------------------------------------------------
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//--------------------------------------------------------------------------
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// File : $RCSfile: AT26DFxxx.v,v $
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// File : $RCSfile: AT26DFxxx.v,v $
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// Path : $Source: /home/cvs/atmel_flash_dev/design_26x/AT26DFxxx.v,v $
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// Path : $Source: /home/cvs/atmel_flash_dev/design_26x/AT26DFxxx.v,v $
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// Author : $ Devi Vasumathy N $
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// Author : $ Devi Vasumathy N $
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// Created on : $ 13-03-07 $
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// Created on : $ 13-03-07 $
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// Revision : $Revision: 1.8 $
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// Revision : $Revision: 1.8 $
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// Last modified by : $Author: devivasumathy $
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// Last modified by : $Author: devivasumathy $
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// Last modified on : $Date: 2007/05/10 05:15:51 $
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// Last modified on : $Date: 2007/05/10 05:15:51 $
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//--------------------------------------------------------------------------
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//--------------------------------------------------------------------------
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// Module : AT26DFxxx.v
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// Module : AT26DFxxx.v
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// Description : BFM for devices AT25DF041A, AT26DF081A,
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// Description : BFM for devices AT25DF041A, AT26DF081A,
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// AT26DF161A, AT26DF321
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// AT26DF161A, AT26DF321
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//
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//
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//--------------------------------------------------------------------------
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//--------------------------------------------------------------------------
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//
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//
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// Design hierarchy : _top.v/top_1.v/top_2.v/...
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// Design hierarchy : _top.v/top_1.v/top_2.v/...
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// Instantiated Modules : top_1.v, top_2.v
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// Instantiated Modules : top_1.v, top_2.v
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//--------------------------------------------------------------------------
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//--------------------------------------------------------------------------
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// Revision history :
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// Revision history :
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// $Log: AT26DFxxx.v,v $
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// $Log: AT26DFxxx.v,v $
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// Revision 1.8 2007/05/10 05:15:51 devivasumathy
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// Revision 1.8 2007/05/10 05:15:51 devivasumathy
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// Card Memory preload
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// Card Memory preload
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//
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//
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// Revision 1.7 2007/04/27 09:09:40 devivasumathy
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// Revision 1.7 2007/04/27 09:09:40 devivasumathy
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// *** empty log message ***
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// *** empty log message ***
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//
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//
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// Revision 1.6 2007/04/17 10:50:59 devivasumathy
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// Revision 1.6 2007/04/17 10:50:59 devivasumathy
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// Timing verified
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// Timing verified
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//
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//
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// Revision 1.5 2007/04/16 06:24:44 devivasumathy
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// Revision 1.5 2007/04/16 06:24:44 devivasumathy
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// *** empty log message ***
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// *** empty log message ***
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//
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//
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// Revision 1.4 2007/04/10 09:37:36 devivasumathy
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// Revision 1.4 2007/04/10 09:37:36 devivasumathy
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// *** empty log message ***
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// *** empty log message ***
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//
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//
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// Revision 1.3 2007/04/09 12:06:09 devivasumathy
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// Revision 1.3 2007/04/09 12:06:09 devivasumathy
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// *** empty log message ***
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// *** empty log message ***
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//
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//
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// Revision 1.2 2007/04/05 14:45:12 devivasumathy
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// Revision 1.2 2007/04/05 14:45:12 devivasumathy
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// *** empty log message ***
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// *** empty log message ***
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//
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//
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// Revision 1.1 2007/04/05 11:32:18 devivasumathy
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// Revision 1.1 2007/04/05 11:32:18 devivasumathy
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// AT26DFx data flash model
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// AT26DFx data flash model
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//
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//
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//--------------------------------------------------------------------------
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//--------------------------------------------------------------------------
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`timescale 1ns/10ps //ME added
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`timescale 1ns/10ps //ME added
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`define def_321 1 //ME added
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`define def_321 1 //ME added
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module AT26DFxxx (
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module AT26DFxxx (
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CSB,
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CSB,
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SCK,
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SCK,
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SI,
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SI,
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WPB,
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WPB,
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`ifdef def_321
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`ifdef def_321
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`else
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`else
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HOLDB,
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HOLDB,
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`endif
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`endif
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SO);
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SO);
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// ******************************************************************** //
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// ******************************************************************** //
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// Port Declaration:
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// Port Declaration:
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// ******************************************************************** //
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// ******************************************************************** //
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input CSB; // Chip Select!
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input CSB; // Chip Select!
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input SCK; // Serial Clock
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input SCK; // Serial Clock
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input SI; // Serial Input
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input SI; // Serial Input
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input WPB; // Write Protect!
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input WPB; // Write Protect!
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`ifdef def_321
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`ifdef def_321
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`else
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`else
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input HOLDB; // Hold!
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input HOLDB; // Hold!
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`endif
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`endif
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output SO; // Serial Output
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output SO; // Serial Output
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`ifdef def_321
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`ifdef def_321
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wire HOLDB;
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wire HOLDB;
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`endif
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`endif
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parameter DEVICE = "AT25DF041A"; // Device selected
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parameter DEVICE = "AT25DF041A"; // Device selected
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parameter PRELOAD = 1; // preload memory with content in MEMORY_FILE
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parameter PRELOAD = 1; // preload memory with content in MEMORY_FILE
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parameter MEMORY_FILE = "flash.in"; // Memory pre-load
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parameter MEMORY_FILE = "flash.in"; // Memory pre-load
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parameter VERBOSE = 1;
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// ********************************************************************* //
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// ********************************************************************* //
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//Timing Parameters :
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//Timing Parameters :
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// ******************************************************************** //
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// ******************************************************************** //
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// Fixed parameters
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// Fixed parameters
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parameter fRDLF = 33; // SCK Frequency for read Array (Low freq - 03h opcode)
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parameter fRDLF = 33; // SCK Frequency for read Array (Low freq - 03h opcode)
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//representation in ns
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//representation in ns
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parameter tDIS = 6; // Output Disable time
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parameter tDIS = 6; // Output Disable time
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parameter tV = 6; // Output Valid time
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parameter tV = 6; // Output Valid time
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parameter tOH = 0 ; // Output Hold time
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parameter tOH = 0 ; // Output Hold time
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parameter tHLQZ = 6 ; // HOLD! Low to Output High-z
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parameter tHLQZ = 6 ; // HOLD! Low to Output High-z
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parameter tHHQX = 6 ; // HOLD! High to Output Low-z
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parameter tHHQX = 6 ; // HOLD! High to Output Low-z
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parameter tSECP = 20; // Sector Protect Time
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parameter tSECP = 20; // Sector Protect Time
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parameter tSECUP = 20; // Sector Unprotect Time
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parameter tSECUP = 20; // Sector Unprotect Time
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parameter tEDPD = 3000; // Chip Select high to Deep Power-down (3 us)
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parameter tEDPD = 3000; // Chip Select high to Deep Power-down (3 us)
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parameter tRDPD = 3000; // Chip Select high to Stand-by Mode
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parameter tRDPD = 3000; // Chip Select high to Stand-by Mode
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parameter tWRSR = 200; // Write Status Register Time
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parameter tWRSR = 200; // Write Status Register Time
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parameter tPP = 5000000; // Page Program Time
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parameter tPP = 5000000; // Page Program Time
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parameter tBLKE4 = 200000000; // Block Erase Time 4-kB
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parameter tBLKE4 = 200000000; // Block Erase Time 4-kB
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parameter tBLKE32 = 600000000; // Block Erase Time 32-kB
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parameter tBLKE32 = 600000000; // Block Erase Time 32-kB
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parameter tCHPEn = 1000000000; // local chip erase time
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parameter tCHPEn = 1000000000; // local chip erase time
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// variable parameters
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// variable parameters
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// ******************************************************************** //
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// ******************************************************************** //
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//parameter tBP = 7000; // Byte Program Time
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//parameter tBP = 7000; // Byte Program Time
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//parameter tBLKE64 = 950000000; // Block Erase Time 64-kB
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//parameter tBLKE64 = 950000000; // Block Erase Time 64-kB
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//parameter tCHPE = 3000000000; // Chip Erase Time // this is actual;
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//parameter tCHPE = 3000000000; // Chip Erase Time // this is actual;
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// due to simulation warning splitted into 2 parameters as tCHPE = tmult * tCHPEn
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// due to simulation warning splitted into 2 parameters as tCHPE = tmult * tCHPEn
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//parameter tmult = 3; // Multiplication factor for chip erase timing
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//parameter tmult = 3; // Multiplication factor for chip erase timing
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parameter tBP = (DEVICE == "AT25DF041A") ? 7000 :
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parameter tBP = (DEVICE == "AT25DF041A") ? 7000 :
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(DEVICE == "AT26DF081A") ? 7000 :
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(DEVICE == "AT26DF081A") ? 7000 :
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(DEVICE == "AT26DF161A") ? 7000 :
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(DEVICE == "AT26DF161A") ? 7000 :
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(DEVICE == "AT26DF321") ? 6000 : 7000;
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(DEVICE == "AT26DF321") ? 6000 : 7000;
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parameter tBLKE64 = (DEVICE == "AT25DF041A") ? 950000000 :
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parameter tBLKE64 = (DEVICE == "AT25DF041A") ? 950000000 :
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(DEVICE == "AT26DF081A") ? 950000000 :
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(DEVICE == "AT26DF081A") ? 950000000 :
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(DEVICE == "AT26DF161A") ? 950000000 :
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(DEVICE == "AT26DF161A") ? 950000000 :
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(DEVICE == "AT26DF321") ? 1000000000 :950000000 ;
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(DEVICE == "AT26DF321") ? 1000000000 :950000000 ;
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parameter tmult = (DEVICE == "AT25DF041A") ? 3 :
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parameter tmult = (DEVICE == "AT25DF041A") ? 3 :
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(DEVICE == "AT26DF081A") ? 6 :
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(DEVICE == "AT26DF081A") ? 6 :
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(DEVICE == "AT26DF161A") ? 12 :
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(DEVICE == "AT26DF161A") ? 12 :
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(DEVICE == "AT26DF321") ? 36 : 3;
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(DEVICE == "AT26DF321") ? 36 : 3;
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//parameter fSCK = 70; // Serial clock (SCK) Frequency in MHz
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//parameter fSCK = 70; // Serial clock (SCK) Frequency in MHz
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//parameter tSCKH = 6.4; // SCK High time
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//parameter tSCKH = 6.4; // SCK High time
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//parameter tSCKL = 6.4; // SCK Low time
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//parameter tSCKL = 6.4; // SCK Low time
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parameter fSCK = (DEVICE == "AT25DF041A") ? 70 :
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parameter fSCK = (DEVICE == "AT25DF041A") ? 70 :
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(DEVICE == "AT26DF081A") ? 70 :
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(DEVICE == "AT26DF081A") ? 70 :
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(DEVICE == "AT26DF161A") ? 70 :
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(DEVICE == "AT26DF161A") ? 70 :
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(DEVICE == "AT26DF321") ? 66 : 70;
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(DEVICE == "AT26DF321") ? 66 : 70;
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parameter tSCKH = (DEVICE == "AT25DF041A") ? 6.4 :
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parameter tSCKH = (DEVICE == "AT25DF041A") ? 6.4 :
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(DEVICE == "AT26DF081A") ? 6.4 :
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(DEVICE == "AT26DF081A") ? 6.4 :
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(DEVICE == "AT26DF161A") ? 6.4 :
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(DEVICE == "AT26DF161A") ? 6.4 :
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(DEVICE == "AT26DF321") ? 6.8 : 6.4;
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(DEVICE == "AT26DF321") ? 6.8 : 6.4;
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parameter tSCKL = (DEVICE == "AT25DF041A") ? 6.4 :
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parameter tSCKL = (DEVICE == "AT25DF041A") ? 6.4 :
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(DEVICE == "AT26DF081A") ? 6.4 :
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(DEVICE == "AT26DF081A") ? 6.4 :
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(DEVICE == "AT26DF161A") ? 6.4 :
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(DEVICE == "AT26DF161A") ? 6.4 :
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(DEVICE == "AT26DF321") ? 6.8 : 6.4;
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(DEVICE == "AT26DF321") ? 6.8 : 6.4;
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// ******************************************************************** //
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// ******************************************************************** //
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// ********************** Manufacturer ID ********************** //
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// ********************** Manufacturer ID ********************** //
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parameter [31:0] MAN_ID = (DEVICE == "AT25DF041A") ? 32'h1F_04_00_00 :
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parameter [31:0] MAN_ID = (DEVICE == "AT25DF041A") ? 32'h1F_04_00_00 :
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(DEVICE == "AT26DF081A") ? 32'h1F_45_01_00 :
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(DEVICE == "AT26DF081A") ? 32'h1F_45_01_00 :
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(DEVICE == "AT26DF161A") ? 32'h1F_46_01_00 :
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(DEVICE == "AT26DF161A") ? 32'h1F_46_01_00 :
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(DEVICE == "AT26DF321") ? 32'h1F_47_00_00 : 32'h1F_04_00_00;
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(DEVICE == "AT26DF321") ? 32'h1F_47_00_00 : 32'h1F_04_00_00;
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// ********* Memory And Access Related Declarations ***************** //
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// ********* Memory And Access Related Declarations ***************** //
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parameter BLOCK64 = (DEVICE == "AT25DF041A") ? 8 : // no of 64kB blocks
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parameter BLOCK64 = (DEVICE == "AT25DF041A") ? 8 : // no of 64kB blocks
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(DEVICE == "AT26DF081A") ? 16 :
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(DEVICE == "AT26DF081A") ? 16 :
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(DEVICE == "AT26DF161A") ? 32 :
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(DEVICE == "AT26DF161A") ? 32 :
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(DEVICE == "AT26DF321") ? 64 : 8 ;
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(DEVICE == "AT26DF321") ? 64 : 8 ;
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parameter SECTOR = (DEVICE == "AT25DF041A") ? 11 : // no of sectors
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parameter SECTOR = (DEVICE == "AT25DF041A") ? 11 : // no of sectors
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(DEVICE == "AT26DF081A") ? 19 :
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(DEVICE == "AT26DF081A") ? 19 :
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(DEVICE == "AT26DF161A") ? 32 :
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(DEVICE == "AT26DF161A") ? 32 :
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(DEVICE == "AT26DF321") ? 64 : 11 ;
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(DEVICE == "AT26DF321") ? 64 : 11 ;
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// total memory size = no. of blocks * 64 k bits (i.e each block contains 64 KB)
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// total memory size = no. of blocks * 64 k bits (i.e each block contains 64 KB)
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parameter MEMSIZE = BLOCK64 * 64 * 1024; // total memory size
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parameter MEMSIZE = BLOCK64 * 64 * 1024; // total memory size
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reg [7:0] memory [MEMSIZE-1:0]; // memory of selected device
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reg [7:0] memory [MEMSIZE-1:0]; // memory of selected device
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reg [7:0] status_reg; // Status register
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reg [7:0] status_reg; // Status register
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reg [63:0] sector_reg; // Sector protection reg
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reg [63:0] sector_reg; // Sector protection reg
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reg [7:0] int_buffer [255:0]; // internal buffer to store data in page programming mode
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reg [7:0] int_buffer [255:0]; // internal buffer to store data in page programming mode
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// ****************** ***************** ***************** //
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// ****************** ***************** ***************** //
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// ********* Registers to track the current operation of the device ******** //
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// ********* Registers to track the current operation of the device ******** //
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reg deep_power_down; // Device in Deep Power Down Mode
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reg deep_power_down; // Device in Deep Power Down Mode
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reg status_read; // Status register is being read
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reg status_read; // Status register is being read
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reg erasing_block4; // 4kB block erase
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reg erasing_block4; // 4kB block erase
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reg erasing_block32; // 32kB block erase
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reg erasing_block32; // 32kB block erase
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reg erasing_block64; // 64kB block erase
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reg erasing_block64; // 64kB block erase
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reg erasing_chip; // chip erase
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reg erasing_chip; // chip erase
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reg rd_dummy; // low/high freq read array
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reg rd_dummy; // low/high freq read array
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reg byte_prog; // Byte/page programming
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reg byte_prog; // Byte/page programming
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reg seq_byte_prog; // sequential byte programming
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reg seq_byte_prog; // sequential byte programming
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reg seq_byte_start; // sequential byte programming start intimation
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reg seq_byte_start; // sequential byte programming start intimation
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// ********* Events to trigger some task based on opcode *********** //
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// ********* Events to trigger some task based on opcode *********** //
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event EDPD; // Deep Power-down (enable)
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event EDPD; // Deep Power-down (enable)
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event RDPD; // Resume from Deep Power-down
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event RDPD; // Resume from Deep Power-down
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event RA; // Read Array
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event RA; // Read Array
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//event RAL; // Read Array (Low frequency)
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//event RAL; // Read Array (Low frequency)
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event BE4; // Block Erase 4KB
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event BE4; // Block Erase 4KB
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event BE32; // Block Erase 32KB
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event BE32; // Block Erase 32KB
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event BE64; // Block Erase 64KB
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event BE64; // Block Erase 64KB
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event CE; // Chip Erase
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event CE; // Chip Erase
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event BP; // byte /page program
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event BP; // byte /page program
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//event SBPE; // Sequential Byte Program Mode Erase
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//event SBPE; // Sequential Byte Program Mode Erase
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event SBP; // Sequential Byte Program
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event SBP; // Sequential Byte Program
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event WE; // Write Enable
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event WE; // Write Enable
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event WD; // Write Disable
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event WD; // Write Disable
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event PS; // Protect Sector
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event PS; // Protect Sector
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event UPS; // Un-Protect Sector
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event UPS; // Un-Protect Sector
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event RSPR; // Read Sector Protection Register
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event RSPR; // Read Sector Protection Register
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event RSR; // Read Status Register
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event RSR; // Read Status Register
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event WSR; // Write Status Register
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event WSR; // Write Status Register
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event MIR; // Manufacturer ID Read
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event MIR; // Manufacturer ID Read
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/******** Other variables/registers ******************/
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/******** Other variables/registers ******************/
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reg [23:0] temp_addr; // to store mem address temporarily
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reg [23:0] temp_addr; // to store mem address temporarily
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reg [23:0] current_address; // to store mem address
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reg [23:0] current_address; // to store mem address
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reg [7:0] temp_data; // temp read data from memory
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reg [7:0] temp_data; // temp read data from memory
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reg [7:0] data_in; // data in for byte programming
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reg [7:0] data_in; // data in for byte programming
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reg [7:0] read_data; // register in which opcode/data is read-in
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reg [7:0] read_data; // register in which opcode/data is read-in
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reg [7:0] read_dummy; // register in which dont care data is stored
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reg [7:0] read_dummy; // register in which dont care data is stored
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reg [3:0] stat_reg_temp; // WSR temp value for global protec/unprotect
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reg [3:0] stat_reg_temp; // WSR temp value for global protec/unprotect
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reg [7:0] pp_address; // specifies the page address for BP/PP
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reg [7:0] pp_address; // specifies the page address for BP/PP
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reg SO_reg; // Signal out reg
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reg SO_reg; // Signal out reg
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reg SO_on; // Signal out enable signal
|
reg SO_on; // Signal out enable signal
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reg SPRL; // Sector Protection Register Locked
|
reg SPRL; // Sector Protection Register Locked
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reg SPM; // Sequential Program Mode Status
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reg SPM; // Sequential Program Mode Status
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reg EPE; // Erase/Program Error
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reg EPE; // Erase/Program Error
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reg WPP; // Write Protection Pin Status
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reg WPP; // Write Protection Pin Status
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reg [1:0] SWP; // Software Protection Status
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reg [1:0] SWP; // Software Protection Status
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reg WEL; // Write Enable Latch Status
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reg WEL; // Write Enable Latch Status
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reg RDYnBSY; // Ready/Busy Status
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reg RDYnBSY; // Ready/Busy Status
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reg lock; // to lock SPRL bit of status reg
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reg lock; // to lock SPRL bit of status reg
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reg unlock; // to unlock SPRL bit of status reg
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reg unlock; // to unlock SPRL bit of status reg
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reg global_protect; // global protection
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reg global_protect; // global protection
|
reg global_unprotect; // global unprotect
|
reg global_unprotect; // global unprotect
|
reg protect; // to protect Sector reg bits
|
reg protect; // to protect Sector reg bits
|
reg unprotect; // to unprotect Sector reg bits
|
reg unprotect; // to unprotect Sector reg bits
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reg protected; // check protection status of sector reg
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reg protected; // check protection status of sector reg
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reg SPRL_val; // WSR temp value for SPRL
|
reg SPRL_val; // WSR temp value for SPRL
|
integer i,j,k,l; // integers for accessing memory
|
integer i,j,k,l; // integers for accessing memory
|
integer pp; // specifies no of bytes need to write in memory
|
integer pp; // specifies no of bytes need to write in memory
|
integer pp_j; // holds no of bytes received for page program
|
integer pp_j; // holds no of bytes received for page program
|
integer pp_i; // holds no of bits received for each byte in page program
|
integer pp_i; // holds no of bits received for each byte in page program
|
integer dummy; // counter for receiving 8 dummy bit from SO
|
integer dummy; // counter for receiving 8 dummy bit from SO
|
integer delay; // waits for Chip Erase to complete
|
integer delay; // waits for Chip Erase to complete
|
|
|
real tperiod; // time period - on period
|
real tperiod; // time period - on period
|
real tperiod1; // time period - off period
|
real tperiod1; // time period - off period
|
reg freq_error; // frequency limit exceeds indication
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reg freq_error; // frequency limit exceeds indication
|
|
|
|
|
// ****************** Initial Block **************** //
|
// ****************** Initial Block **************** //
|
`ifdef def_321
|
`ifdef def_321
|
assign HOLDB = 1'b1;
|
assign HOLDB = 1'b1;
|
`endif
|
`endif
|
|
|
initial
|
initial
|
begin
|
begin
|
|
|
// Memory Initialization
|
// Memory Initialization
|
//To pre-load Memory (in Hex format), use parameter MEMORY_FILE = <filename>,
|
//To pre-load Memory (in Hex format), use parameter MEMORY_FILE = <filename>,
|
//where <filename> is the name of the pre-load file.
|
//where <filename> is the name of the pre-load file.
|
//If PRELOAD = 0, the Memory is initialized to Erased state (all data = FF).
|
//If PRELOAD = 0, the Memory is initialized to Erased state (all data = FF).
|
//If PRELOAD = 1, the Memory is initialized to PreLoad state (data in pre-load file).
|
//If PRELOAD = 1, the Memory is initialized to PreLoad state (data in pre-load file).
|
|
|
for(i=0; i<BLOCK64; i=i+1) // Block64K access
|
for(i=0; i<BLOCK64; i=i+1) // Block64K access
|
begin
|
begin
|
for(j=0; j<2; j=j+1) // Block32K access
|
for(j=0; j<2; j=j+1) // Block32K access
|
begin
|
begin
|
for(k=0; k<8; k=k+1) // Block4K access
|
for(k=0; k<8; k=k+1) // Block4K access
|
begin
|
begin
|
for(l=0; l < 12'hfff; l=l+1)
|
for(l=0; l < 12'hfff; l=l+1)
|
begin
|
begin
|
memory[l] = 8'b11111111;
|
memory[l] = 8'b11111111;
|
end
|
end
|
end
|
end
|
end
|
end
|
end
|
end
|
|
|
// Memory Initialization for preloading condition
|
// Memory Initialization for preloading condition
|
if(PRELOAD==1)
|
if(PRELOAD==1)
|
begin
|
begin
|
$readmemh (MEMORY_FILE, memory);
|
$readmemh (MEMORY_FILE, memory);
|
end
|
end
|
|
|
|
|
// Status register initialization
|
// Status register initialization
|
SPRL = 1'b0;
|
SPRL = 1'b0;
|
SPM = 1'b0;
|
SPM = 1'b0;
|
EPE = 1'b0;
|
EPE = 1'b0;
|
WPP = 1'b0;
|
WPP = 1'b0;
|
SWP = 2'b11;
|
SWP = 2'b11;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
RDYnBSY = 1'b0; // device is ready
|
RDYnBSY = 1'b0; // device is ready
|
status_reg[7] = SPRL;
|
status_reg[7] = SPRL;
|
status_reg[6] = SPM;
|
status_reg[6] = SPM;
|
status_reg[5] = EPE; // reserved
|
status_reg[5] = EPE; // reserved
|
status_reg[4] = WPP;
|
status_reg[4] = WPP;
|
status_reg[3:2] = SWP;
|
status_reg[3:2] = SWP;
|
status_reg[1] = WEL;
|
status_reg[1] = WEL;
|
status_reg[0] = RDYnBSY;
|
status_reg[0] = RDYnBSY;
|
//status_reg = {1'b1,1'b0,1'b0,1'b0,2'b11,2'b0};
|
//status_reg = {1'b1,1'b0,1'b0,1'b0,2'b11,2'b0};
|
|
|
sector_reg = 64'hFFFFFFFFFFFFFFFF;
|
sector_reg = 64'hFFFFFFFFFFFFFFFF;
|
|
|
// Stand-by mode initialization
|
// Stand-by mode initialization
|
current_address = 24'b0;
|
current_address = 24'b0;
|
data_in = 8'b0;
|
data_in = 8'b0;
|
stat_reg_temp = 4'b0;
|
stat_reg_temp = 4'b0;
|
deep_power_down = 1'b0;
|
deep_power_down = 1'b0;
|
status_read = 1'b0;
|
status_read = 1'b0;
|
rd_dummy = 1'b0;
|
rd_dummy = 1'b0;
|
seq_byte_start = 1'b0;
|
seq_byte_start = 1'b0;
|
SO_on = 1'b0;
|
SO_on = 1'b0;
|
global_protect = 1'b0;
|
global_protect = 1'b0;
|
global_unprotect = 1'b0;
|
global_unprotect = 1'b0;
|
SPRL_val = 1'b0;
|
SPRL_val = 1'b0;
|
lock = 1'b0;
|
lock = 1'b0;
|
unlock = 1'b0;
|
unlock = 1'b0;
|
dummy = 0;
|
dummy = 0;
|
|
|
deep_power_down = 1'b0;
|
deep_power_down = 1'b0;
|
status_read = 1'b0;
|
status_read = 1'b0;
|
erasing_block4 = 1'b0;
|
erasing_block4 = 1'b0;
|
erasing_block32 = 1'b0;
|
erasing_block32 = 1'b0;
|
erasing_block64 = 1'b0;
|
erasing_block64 = 1'b0;
|
erasing_chip = 1'b0;
|
erasing_chip = 1'b0;
|
rd_dummy = 1'b0;
|
rd_dummy = 1'b0;
|
byte_prog = 1'b0;
|
byte_prog = 1'b0;
|
seq_byte_prog = 1'b0;
|
seq_byte_prog = 1'b0;
|
seq_byte_start = 1'b0;
|
seq_byte_start = 1'b0;
|
|
|
end // end of initial
|
end // end of initial
|
|
|
// ********************** Drive SO ********************* //
|
// ********************** Drive SO ********************* //
|
bufif1 (SO, SO_reg, SO_on); //SO will be driven only if SO_on is High
|
bufif1 (SO, SO_reg, SO_on); //SO will be driven only if SO_on is High
|
|
|
// global protection and unprotection on sectors
|
// global protection and unprotection on sectors
|
always@(global_protect or global_unprotect)
|
always@(global_protect or global_unprotect)
|
begin
|
begin
|
if(global_protect==1'b1)
|
if(global_protect==1'b1)
|
sector_reg = 64'hFFFFFFFFFFFFFFFF;
|
sector_reg = 64'hFFFFFFFFFFFFFFFF;
|
else if(global_unprotect==1'b1)
|
else if(global_unprotect==1'b1)
|
sector_reg[SECTOR-1:0] = 'b0;
|
sector_reg[SECTOR-1:0] = 'b0;
|
end
|
end
|
|
|
// ********************* Status register ********************* //
|
// ********************* Status register ********************* //
|
always @(WPB or lock or unlock) //SPRL bit locking & Unlocking
|
always @(WPB or lock or unlock) //SPRL bit locking & Unlocking
|
begin
|
begin
|
if(WPB==1'b1 && SPRL==1'b0 && lock==1'b1)
|
if(WPB==1'b1 && SPRL==1'b0 && lock==1'b1)
|
SPRL = 1'b1;
|
SPRL = 1'b1;
|
else if(WPB==1'b1 && SPRL==1'b1 && unlock==1'b1)
|
else if(WPB==1'b1 && SPRL==1'b1 && unlock==1'b1)
|
SPRL = 1'b0; // S/W Locked
|
SPRL = 1'b0; // S/W Locked
|
else if(WPB==1'b0 && SPRL==1'b0 && lock==1'b1)
|
else if(WPB==1'b0 && SPRL==1'b0 && lock==1'b1)
|
SPRL = 1'b1;
|
SPRL = 1'b1;
|
else if(WPB==1'b0 && SPRL==1'b1 && unlock==1'b1)
|
else if(WPB==1'b0 && SPRL==1'b1 && unlock==1'b1)
|
SPRL = 1'b1; // H/W Locked
|
SPRL = 1'b1; // H/W Locked
|
end
|
end
|
|
|
always @(WPB) // Write Protect (WP!) Pin Status
|
always @(WPB) // Write Protect (WP!) Pin Status
|
begin
|
begin
|
WPP = WPB;
|
WPP = WPB;
|
end
|
end
|
|
|
always @(sector_reg) // Software Protection Status
|
always @(sector_reg) // Software Protection Status
|
begin
|
begin
|
if(sector_reg[SECTOR-1:0]=='d0)
|
if(sector_reg[SECTOR-1:0]=='d0)
|
SWP = 2'b00;
|
SWP = 2'b00;
|
else if((|sector_reg==1'b1) && (§or_reg==1'b0))
|
else if((|sector_reg==1'b1) && (§or_reg==1'b0))
|
SWP = 2'b01;
|
SWP = 2'b01;
|
else if(§or_reg==1'b1)
|
else if(§or_reg==1'b1)
|
SWP = 2'b11;
|
SWP = 2'b11;
|
end
|
end
|
|
|
always @(SPRL or SPM or EPE or WPP or SWP or WEL or RDYnBSY)
|
always @(SPRL or SPM or EPE or WPP or SWP or WEL or RDYnBSY)
|
begin
|
begin
|
status_reg = {SPRL,SPM,EPE,WPP,SWP,WEL,RDYnBSY};
|
status_reg = {SPRL,SPM,EPE,WPP,SWP,WEL,RDYnBSY};
|
end
|
end
|
|
|
// ******* to receive opcode and to switch to respective blocks ******* //
|
// ******* to receive opcode and to switch to respective blocks ******* //
|
always @(negedge CSB) // the device will now become active
|
always @(negedge CSB) // the device will now become active
|
begin : get_opcode_
|
begin : get_opcode_
|
|
|
//@(negedge SCK);
|
//@(negedge SCK);
|
get_opcode; // get opcode here
|
get_opcode; // get opcode here
|
|
|
if (deep_power_down == 1'b1) // Can be only after background has been enabled
|
if (deep_power_down == 1'b1) // Can be only after background has been enabled
|
case (read_data)
|
case (read_data)
|
8'hAB: // Resume from Deep Power-down
|
8'hAB: // Resume from Deep Power-down
|
begin
|
begin
|
$display("Opcode(%h) for Resume from Deep Power-down received",read_data);
|
$display("Opcode(%h) for Resume from Deep Power-down received",read_data);
|
-> RDPD;
|
-> RDPD;
|
end
|
end
|
default :
|
default :
|
begin
|
begin
|
$display ("Opcode %h is not allowed: device in Deep Power-down", read_data);
|
$display ("Opcode %h is not allowed: device in Deep Power-down", read_data);
|
disable get_opcode_;
|
disable get_opcode_;
|
end
|
end
|
endcase
|
endcase
|
else
|
else
|
begin
|
begin
|
case (read_data) // based on opcode, trigger an action
|
case (read_data) // based on opcode, trigger an action
|
8'h0B : // Read Array
|
8'h0B : // Read Array
|
begin
|
begin
|
$display("Opcode(%h) for Read Array received",read_data);
|
$display("Opcode(%h) for Read Array received",read_data);
|
rd_dummy = 1'b1;
|
rd_dummy = 1'b1;
|
-> RA;
|
-> RA;
|
end
|
end
|
8'h03 : // Read Array (low freq)
|
8'h03 : // Read Array (low freq)
|
begin
|
begin
|
// Comment out this to clean up sim output
|
// Comment out this to clean up sim output
|
//$display("Opcode(%h) for Read Array (Low Freq) received",read_data);
|
//$display("Opcode(%h) for Read Array (Low Freq) received",read_data);
|
rd_dummy = 1'b0;
|
rd_dummy = 1'b0;
|
-> RA;
|
-> RA;
|
end
|
end
|
8'h20 : // Block erase 4 KB
|
8'h20 : // Block erase 4 KB
|
begin
|
begin
|
$display("Opcode(%h) for 4 KB Block erase received",read_data);
|
$display("Opcode(%h) for 4 KB Block erase received",read_data);
|
-> BE4;
|
-> BE4;
|
end
|
end
|
8'h52 : // Block erase 32 KB
|
8'h52 : // Block erase 32 KB
|
begin
|
begin
|
$display("Opcode(%h) for 32 KB Block erase received",read_data);
|
$display("Opcode(%h) for 32 KB Block erase received",read_data);
|
-> BE32;
|
-> BE32;
|
end
|
end
|
8'hD8 : // Block erase 64 KB
|
8'hD8 : // Block erase 64 KB
|
begin
|
begin
|
$display("Opcode(%h) for 64 KB Block erase received",read_data);
|
$display("Opcode(%h) for 64 KB Block erase received",read_data);
|
-> BE64;
|
-> BE64;
|
end
|
end
|
8'h60 : // Chip erase
|
8'h60 : // Chip erase
|
begin
|
begin
|
$display("Opcode(%h) for Chip erase received",read_data);
|
$display("Opcode(%h) for Chip erase received",read_data);
|
-> CE;
|
-> CE;
|
end
|
end
|
8'hC7 : // Chip erase
|
8'hC7 : // Chip erase
|
begin
|
begin
|
$display("Opcode(%h) for Chip erase received",read_data);
|
$display("Opcode(%h) for Chip erase received",read_data);
|
-> CE;
|
-> CE;
|
end
|
end
|
8'h02 : // Byte Program
|
8'h02 : // Byte Program
|
begin
|
begin
|
$display("Opcode(%h) Byte Program received",read_data);
|
$display("Opcode(%h) Byte Program received",read_data);
|
-> BP;
|
-> BP;
|
end
|
end
|
8'hAD : // Sequential Byte Program Mode Erase
|
8'hAD : // Sequential Byte Program Mode Erase
|
begin
|
begin
|
if(DEVICE=="AT25DF041A" || DEVICE=="AT26DF081A" || DEVICE=="AT26DF161A")
|
if(DEVICE=="AT25DF041A" || DEVICE=="AT26DF081A" || DEVICE=="AT26DF161A")
|
begin
|
begin
|
$display("Opcode(%h) Sequential Byte Program received",read_data);
|
$display("Opcode(%h) Sequential Byte Program received",read_data);
|
-> SBP;
|
-> SBP;
|
end
|
end
|
else if(DEVICE=="AT26DF321")
|
else if(DEVICE=="AT26DF321")
|
$display("Sequential Byte Program is not supported for device %s",DEVICE);
|
$display("Sequential Byte Program is not supported for device %s",DEVICE);
|
end
|
end
|
8'hAF : // Sequential Byte Program Mode
|
8'hAF : // Sequential Byte Program Mode
|
begin
|
begin
|
if(DEVICE=="AT25DF041A" || DEVICE=="AT26DF081A" || DEVICE=="AT26DF161A")
|
if(DEVICE=="AT25DF041A" || DEVICE=="AT26DF081A" || DEVICE=="AT26DF161A")
|
begin
|
begin
|
$display("Opcode(%h) Sequential Byte Program received",read_data);
|
$display("Opcode(%h) Sequential Byte Program received",read_data);
|
-> SBP;
|
-> SBP;
|
end
|
end
|
else if(DEVICE=="AT26DF321")
|
else if(DEVICE=="AT26DF321")
|
$display("Sequential Byte Program is not supported for device %s",DEVICE);
|
$display("Sequential Byte Program is not supported for device %s",DEVICE);
|
end
|
end
|
8'h06 : // Write Enable
|
8'h06 : // Write Enable
|
begin
|
begin
|
$display("Opcode(%h) for Write Enable received",read_data);
|
$display("Opcode(%h) for Write Enable received",read_data);
|
-> WE;
|
-> WE;
|
end
|
end
|
8'h04 : // Write Disable
|
8'h04 : // Write Disable
|
begin
|
begin
|
$display("Opcode(%h) for Write Disable received",read_data);
|
$display("Opcode(%h) for Write Disable received",read_data);
|
-> WD;
|
-> WD;
|
end
|
end
|
8'h36 : // Protect Sector
|
8'h36 : // Protect Sector
|
begin
|
begin
|
$display("Opcode(%h) for Protect Sector received",read_data);
|
$display("Opcode(%h) for Protect Sector received",read_data);
|
-> PS;
|
-> PS;
|
end
|
end
|
8'h39 : // Unprotect Sector
|
8'h39 : // Unprotect Sector
|
begin
|
begin
|
$display("Opcode(%h) for Unprotect Sector received",read_data);
|
$display("Opcode(%h) for Unprotect Sector received",read_data);
|
-> UPS;
|
-> UPS;
|
end
|
end
|
8'h3C : // Read Sector Protection Register
|
8'h3C : // Read Sector Protection Register
|
begin
|
begin
|
$display("Opcode(%h) for Read Sector Protection Register received",read_data);
|
$display("Opcode(%h) for Read Sector Protection Register received",read_data);
|
-> RSPR;
|
-> RSPR;
|
end
|
end
|
8'h05 : // Read Status Register
|
8'h05 : // Read Status Register
|
begin
|
begin
|
$display("Opcode(%h) for Status Register Read received",read_data);
|
$display("Opcode(%h) for Status Register Read received",read_data);
|
-> RSR;
|
-> RSR;
|
end
|
end
|
8'h01 : // Write Status Register
|
8'h01 : // Write Status Register
|
begin
|
begin
|
$display("Opcode(%h) for Write Status Register received",read_data);
|
$display("Opcode(%h) for Write Status Register received",read_data);
|
-> WSR;
|
-> WSR;
|
end
|
end
|
8'h9F : // Read Manufacturer and Device ID
|
8'h9F : // Read Manufacturer and Device ID
|
begin
|
begin
|
$display("Opcode(%h) for Read Manufacturer and Device ID received",read_data);
|
$display("Opcode(%h) for Read Manufacturer and Device ID received",read_data);
|
-> MIR;
|
-> MIR;
|
end
|
end
|
8'hB9 : // Deep Power-down
|
8'hB9 : // Deep Power-down
|
begin
|
begin
|
$display("Opcode(%h) for Deep Power-down received",read_data);
|
$display("Opcode(%h) for Deep Power-down received",read_data);
|
-> EDPD;
|
-> EDPD;
|
end
|
end
|
default :
|
default :
|
begin
|
begin
|
$display ("Unrecognized opcode %h", read_data);
|
$display ("Unrecognized opcode %h", read_data);
|
disable get_opcode_;
|
disable get_opcode_;
|
end
|
end
|
endcase
|
endcase
|
end
|
end
|
end
|
end
|
|
|
// *********************** TASKS / FUNCTIONS ************************** //
|
// *********************** TASKS / FUNCTIONS ************************** //
|
|
|
// get_opcode is a task to get 8 bits of opcode.
|
// get_opcode is a task to get 8 bits of opcode.
|
// It obtains 8 bits of data obtained on SI
|
// It obtains 8 bits of data obtained on SI
|
task get_opcode;
|
task get_opcode;
|
|
|
integer i;
|
integer i;
|
begin
|
begin
|
for (i=8; i>0; i = i-1)
|
for (i=8; i>0; i = i-1)
|
begin
|
begin
|
@(posedge SCK);
|
@(posedge SCK);
|
read_data[i-1] = SI;
|
read_data[i-1] = SI;
|
if(HOLDB==1'b0)
|
if(HOLDB==1'b0)
|
wait (HOLDB);
|
wait (HOLDB);
|
end
|
end
|
i=7;
|
i=7;
|
end
|
end
|
endtask
|
endtask
|
|
|
// get_data is a task to get 8 bits of data. This data could be an address,
|
// get_data is a task to get 8 bits of data. This data could be an address,
|
// data or anything. It just obtains 8 bits of data obtained on SI
|
// data or anything. It just obtains 8 bits of data obtained on SI
|
task get_data;
|
task get_data;
|
|
|
integer i;
|
integer i;
|
begin
|
begin
|
for (i=7; i>=0; i = i-1)
|
for (i=7; i>=0; i = i-1)
|
begin
|
begin
|
@(posedge SCK);
|
@(posedge SCK);
|
read_data[i] = SI;
|
read_data[i] = SI;
|
if(HOLDB==1'b0)
|
if(HOLDB==1'b0)
|
wait (HOLDB);
|
wait (HOLDB);
|
end
|
end
|
i=7;
|
i=7;
|
end
|
end
|
endtask
|
endtask
|
|
|
// task read_out_array is to read from main Memory
|
// task read_out_array is to read from main Memory
|
task read_out_array ;
|
task read_out_array ;
|
input [23:0] read_addr;
|
input [23:0] read_addr;
|
integer i;
|
integer i;
|
|
|
begin
|
begin
|
temp_data = memory [read_addr];
|
temp_data = memory [read_addr];
|
i = 7;
|
i = 7;
|
while (CSB == 1'b0) // continue transmitting, while, CSB is Low
|
while (CSB == 1'b0) // continue transmitting, while, CSB is Low
|
begin
|
begin
|
@(negedge SCK);
|
@(negedge SCK);
|
SO_reg = 1'bx;
|
SO_reg = 1'bx;
|
if(HOLDB==1'b0)
|
if(HOLDB==1'b0)
|
begin
|
begin
|
#tHLQZ SO_on = 1'b0;
|
#tHLQZ SO_on = 1'b0;
|
wait (HOLDB);
|
wait (HOLDB);
|
#tHHQX;
|
#tHHQX;
|
end
|
end
|
#tV SO_reg = temp_data[i];
|
#tV SO_reg = temp_data[i];
|
SO_on = 1'b1;
|
SO_on = 1'b1;
|
if (i == 0)
|
if (i == 0)
|
begin
|
begin
|
//$display ("Data: %h read from memory location %h",temp_data,read_addr);
|
if (VERBOSE)
|
|
$display ("Data: %h read from memory location %h",temp_data,read_addr);
|
read_addr = read_addr + 1; // next byte
|
read_addr = read_addr + 1; // next byte
|
i = 7;
|
i = 7;
|
if (read_addr >= (MEMSIZE-1))
|
if (read_addr >= (MEMSIZE-1))
|
read_addr = 0; // Note that rollover occurs at end of memory,
|
read_addr = 0; // Note that rollover occurs at end of memory,
|
temp_data = memory [read_addr];
|
temp_data = memory [read_addr];
|
end
|
end
|
else
|
else
|
i = i - 1; // next bit
|
i = i - 1; // next bit
|
end // reading over, because CSB has gone high
|
end // reading over, because CSB has gone high
|
end
|
end
|
endtask
|
endtask
|
|
|
// Sector protection
|
// Sector protection
|
task protect_sector;
|
task protect_sector;
|
input [23:0] protect_address;
|
input [23:0] protect_address;
|
|
|
begin
|
begin
|
$display("Entered Protect Sector task");
|
$display("Entered Protect Sector task");
|
|
|
if (DEVICE == "AT26DF321" && protect==1'b1)
|
if (DEVICE == "AT26DF321" && protect==1'b1)
|
begin
|
begin
|
if(protect_address[23:16]==8'b00111111)
|
if(protect_address[23:16]==8'b00111111)
|
sector_reg[63] = 1'b1;
|
sector_reg[63] = 1'b1;
|
else if(protect_address[23:16]==8'b00111110)
|
else if(protect_address[23:16]==8'b00111110)
|
sector_reg[62] = 1'b1;
|
sector_reg[62] = 1'b1;
|
else if(protect_address[23:16]==8'b00111101)
|
else if(protect_address[23:16]==8'b00111101)
|
sector_reg[61] = 1'b1;
|
sector_reg[61] = 1'b1;
|
else if(protect_address[23:16]==8'b00111100)
|
else if(protect_address[23:16]==8'b00111100)
|
sector_reg[60] = 1'b1;
|
sector_reg[60] = 1'b1;
|
else if(protect_address[23:16]==8'b00111011)
|
else if(protect_address[23:16]==8'b00111011)
|
sector_reg[59] = 1'b1;
|
sector_reg[59] = 1'b1;
|
else if(protect_address[23:16]==8'b00111010)
|
else if(protect_address[23:16]==8'b00111010)
|
sector_reg[58] = 1'b1;
|
sector_reg[58] = 1'b1;
|
else if(protect_address[23:16]==8'b00111001)
|
else if(protect_address[23:16]==8'b00111001)
|
sector_reg[57] = 1'b1;
|
sector_reg[57] = 1'b1;
|
else if(protect_address[23:16]==8'b00111000)
|
else if(protect_address[23:16]==8'b00111000)
|
sector_reg[56] = 1'b1;
|
sector_reg[56] = 1'b1;
|
else if(protect_address[23:16]==8'b00110111)
|
else if(protect_address[23:16]==8'b00110111)
|
sector_reg[55] = 1'b1;
|
sector_reg[55] = 1'b1;
|
else if(protect_address[23:16]==8'b00110110)
|
else if(protect_address[23:16]==8'b00110110)
|
sector_reg[54] = 1'b1;
|
sector_reg[54] = 1'b1;
|
else if(protect_address[23:16]==8'b00110101)
|
else if(protect_address[23:16]==8'b00110101)
|
sector_reg[53] = 1'b1;
|
sector_reg[53] = 1'b1;
|
else if(protect_address[23:16]==8'b00110100)
|
else if(protect_address[23:16]==8'b00110100)
|
sector_reg[52] = 1'b1;
|
sector_reg[52] = 1'b1;
|
else if(protect_address[23:16]==8'b00110011)
|
else if(protect_address[23:16]==8'b00110011)
|
sector_reg[51] = 1'b1;
|
sector_reg[51] = 1'b1;
|
else if(protect_address[23:16]==8'b00110010)
|
else if(protect_address[23:16]==8'b00110010)
|
sector_reg[50] = 1'b1;
|
sector_reg[50] = 1'b1;
|
else if(protect_address[23:16]==8'b00110001)
|
else if(protect_address[23:16]==8'b00110001)
|
sector_reg[49] = 1'b1;
|
sector_reg[49] = 1'b1;
|
else if(protect_address[23:16]==8'b00110000)
|
else if(protect_address[23:16]==8'b00110000)
|
sector_reg[48] = 1'b1;
|
sector_reg[48] = 1'b1;
|
else if(protect_address[23:16]==8'b00101111)
|
else if(protect_address[23:16]==8'b00101111)
|
sector_reg[47] = 1'b1;
|
sector_reg[47] = 1'b1;
|
else if(protect_address[23:16]==8'b00101110)
|
else if(protect_address[23:16]==8'b00101110)
|
sector_reg[46] = 1'b1;
|
sector_reg[46] = 1'b1;
|
else if(protect_address[23:16]==8'b00101101)
|
else if(protect_address[23:16]==8'b00101101)
|
sector_reg[45] = 1'b1;
|
sector_reg[45] = 1'b1;
|
else if(protect_address[23:16]==8'b00101100)
|
else if(protect_address[23:16]==8'b00101100)
|
sector_reg[44] = 1'b1;
|
sector_reg[44] = 1'b1;
|
else if(protect_address[23:16]==8'b00101011)
|
else if(protect_address[23:16]==8'b00101011)
|
sector_reg[43] = 1'b1;
|
sector_reg[43] = 1'b1;
|
else if(protect_address[23:16]==8'b00101010)
|
else if(protect_address[23:16]==8'b00101010)
|
sector_reg[42] = 1'b1;
|
sector_reg[42] = 1'b1;
|
else if(protect_address[23:16]==8'b00101001)
|
else if(protect_address[23:16]==8'b00101001)
|
sector_reg[41] = 1'b1;
|
sector_reg[41] = 1'b1;
|
else if(protect_address[23:16]==8'b00101000)
|
else if(protect_address[23:16]==8'b00101000)
|
sector_reg[40] = 1'b1;
|
sector_reg[40] = 1'b1;
|
else if(protect_address[23:16]==8'b00100111)
|
else if(protect_address[23:16]==8'b00100111)
|
sector_reg[39] = 1'b1;
|
sector_reg[39] = 1'b1;
|
else if(protect_address[23:16]==8'b00100110)
|
else if(protect_address[23:16]==8'b00100110)
|
sector_reg[38] = 1'b1;
|
sector_reg[38] = 1'b1;
|
else if(protect_address[23:16]==8'b00100101)
|
else if(protect_address[23:16]==8'b00100101)
|
sector_reg[37] = 1'b1;
|
sector_reg[37] = 1'b1;
|
else if(protect_address[23:16]==8'b00100100)
|
else if(protect_address[23:16]==8'b00100100)
|
sector_reg[36] = 1'b1;
|
sector_reg[36] = 1'b1;
|
else if(protect_address[23:16]==8'b00100011)
|
else if(protect_address[23:16]==8'b00100011)
|
sector_reg[35] = 1'b1;
|
sector_reg[35] = 1'b1;
|
else if(protect_address[23:16]==8'b00100010)
|
else if(protect_address[23:16]==8'b00100010)
|
sector_reg[34] = 1'b1;
|
sector_reg[34] = 1'b1;
|
else if(protect_address[23:16]==8'b00100001)
|
else if(protect_address[23:16]==8'b00100001)
|
sector_reg[33] = 1'b1;
|
sector_reg[33] = 1'b1;
|
else if(protect_address[23:16]==8'b00100000)
|
else if(protect_address[23:16]==8'b00100000)
|
sector_reg[32] = 1'b1;
|
sector_reg[32] = 1'b1;
|
end
|
end
|
if ((DEVICE == "AT26DF161A" || DEVICE == "AT26DF321") && protect==1'b1)
|
if ((DEVICE == "AT26DF161A" || DEVICE == "AT26DF321") && protect==1'b1)
|
begin
|
begin
|
if(protect_address[23:16]==8'b00011111)
|
if(protect_address[23:16]==8'b00011111)
|
sector_reg[31] = 1'b1;
|
sector_reg[31] = 1'b1;
|
else if(protect_address[23:16]==8'b00011110)
|
else if(protect_address[23:16]==8'b00011110)
|
sector_reg[30] = 1'b1;
|
sector_reg[30] = 1'b1;
|
else if(protect_address[23:16]==8'b00011101)
|
else if(protect_address[23:16]==8'b00011101)
|
sector_reg[29] = 1'b1;
|
sector_reg[29] = 1'b1;
|
else if(protect_address[23:16]==8'b00011100)
|
else if(protect_address[23:16]==8'b00011100)
|
sector_reg[28] = 1'b1;
|
sector_reg[28] = 1'b1;
|
else if(protect_address[23:16]==8'b00011011)
|
else if(protect_address[23:16]==8'b00011011)
|
sector_reg[27] = 1'b1;
|
sector_reg[27] = 1'b1;
|
else if(protect_address[23:16]==8'b00011010)
|
else if(protect_address[23:16]==8'b00011010)
|
sector_reg[26] = 1'b1;
|
sector_reg[26] = 1'b1;
|
else if(protect_address[23:16]==8'b00011001)
|
else if(protect_address[23:16]==8'b00011001)
|
sector_reg[25] = 1'b1;
|
sector_reg[25] = 1'b1;
|
else if(protect_address[23:16]==8'b00011000)
|
else if(protect_address[23:16]==8'b00011000)
|
sector_reg[24] = 1'b1;
|
sector_reg[24] = 1'b1;
|
else if(protect_address[23:16]==8'b00010111)
|
else if(protect_address[23:16]==8'b00010111)
|
sector_reg[23] = 1'b1;
|
sector_reg[23] = 1'b1;
|
else if(protect_address[23:16]==8'b00010110)
|
else if(protect_address[23:16]==8'b00010110)
|
sector_reg[22] = 1'b1;
|
sector_reg[22] = 1'b1;
|
else if(protect_address[23:16]==8'b00010101)
|
else if(protect_address[23:16]==8'b00010101)
|
sector_reg[21] = 1'b1;
|
sector_reg[21] = 1'b1;
|
else if(protect_address[23:16]==8'b00010100)
|
else if(protect_address[23:16]==8'b00010100)
|
sector_reg[20] = 1'b1;
|
sector_reg[20] = 1'b1;
|
else if(protect_address[23:16]==8'b00010011)
|
else if(protect_address[23:16]==8'b00010011)
|
sector_reg[19] = 1'b1;
|
sector_reg[19] = 1'b1;
|
else if(protect_address[23:16]==8'b00010010)
|
else if(protect_address[23:16]==8'b00010010)
|
sector_reg[18] = 1'b1;
|
sector_reg[18] = 1'b1;
|
else if(protect_address[23:16]==8'b00010001)
|
else if(protect_address[23:16]==8'b00010001)
|
sector_reg[17] = 1'b1;
|
sector_reg[17] = 1'b1;
|
else if(protect_address[23:16]==8'b00010000)
|
else if(protect_address[23:16]==8'b00010000)
|
sector_reg[16] = 1'b1;
|
sector_reg[16] = 1'b1;
|
end
|
end
|
|
|
if (DEVICE == "AT26DF081A" && protect==1'b1) // un-uniform sectors of AT26DF081A
|
if (DEVICE == "AT26DF081A" && protect==1'b1) // un-uniform sectors of AT26DF081A
|
begin
|
begin
|
if(protect_address[23:14]==10'b00001111_00)
|
if(protect_address[23:14]==10'b00001111_00)
|
sector_reg[15] = 1'b1;
|
sector_reg[15] = 1'b1;
|
else if(protect_address[23:13]==11'b00001111_010)
|
else if(protect_address[23:13]==11'b00001111_010)
|
sector_reg[16] = 1'b1;
|
sector_reg[16] = 1'b1;
|
else if(protect_address[23:13]==11'b00001111_011)
|
else if(protect_address[23:13]==11'b00001111_011)
|
sector_reg[17] = 1'b1;
|
sector_reg[17] = 1'b1;
|
else if(protect_address[23:17]==9'b00001111_1)
|
else if(protect_address[23:17]==9'b00001111_1)
|
sector_reg[18] = 1'b1;
|
sector_reg[18] = 1'b1;
|
end
|
end
|
else if ((DEVICE == "AT26DF161A" || DEVICE == "AT26DF321") && protect==1'b1)
|
else if ((DEVICE == "AT26DF161A" || DEVICE == "AT26DF321") && protect==1'b1)
|
begin
|
begin
|
if(protect_address[23:16]==8'b00001111)
|
if(protect_address[23:16]==8'b00001111)
|
sector_reg[15] = 1'b1;
|
sector_reg[15] = 1'b1;
|
end
|
end
|
|
|
if ((DEVICE == "AT26DF081A" || DEVICE == "AT26DF161A" || DEVICE == "AT26DF321") && protect==1'b1)
|
if ((DEVICE == "AT26DF081A" || DEVICE == "AT26DF161A" || DEVICE == "AT26DF321") && protect==1'b1)
|
begin
|
begin
|
// if(protect_address[23:16]==8'b00001111)
|
// if(protect_address[23:16]==8'b00001111)
|
// sector_reg[15] = 1'b1;
|
// sector_reg[15] = 1'b1;
|
if(protect_address[23:16]==8'b00001110)
|
if(protect_address[23:16]==8'b00001110)
|
sector_reg[14] = 1'b1;
|
sector_reg[14] = 1'b1;
|
else if(protect_address[23:16]==8'b00001101)
|
else if(protect_address[23:16]==8'b00001101)
|
sector_reg[13] = 1'b1;
|
sector_reg[13] = 1'b1;
|
else if(protect_address[23:16]==8'b00001100)
|
else if(protect_address[23:16]==8'b00001100)
|
sector_reg[12] = 1'b1;
|
sector_reg[12] = 1'b1;
|
else if(protect_address[23:16]==8'b00001011)
|
else if(protect_address[23:16]==8'b00001011)
|
sector_reg[11] = 1'b1;
|
sector_reg[11] = 1'b1;
|
else if(protect_address[23:16]==8'b00001010)
|
else if(protect_address[23:16]==8'b00001010)
|
sector_reg[10] = 1'b1;
|
sector_reg[10] = 1'b1;
|
else if(protect_address[23:16]==8'b00001001)
|
else if(protect_address[23:16]==8'b00001001)
|
sector_reg[9] = 1'b1;
|
sector_reg[9] = 1'b1;
|
else if(protect_address[23:16]==8'b00001000)
|
else if(protect_address[23:16]==8'b00001000)
|
sector_reg[8] = 1'b1;
|
sector_reg[8] = 1'b1;
|
end
|
end
|
|
|
if (DEVICE == "AT25DF041A" && protect==1'b1) // un-uniform sectors of AT25DF041A
|
if (DEVICE == "AT25DF041A" && protect==1'b1) // un-uniform sectors of AT25DF041A
|
begin
|
begin
|
if(protect_address[23:15]==9'b00000111_0)
|
if(protect_address[23:15]==9'b00000111_0)
|
sector_reg[7] = 1'b1;
|
sector_reg[7] = 1'b1;
|
else if(protect_address[23:13]==11'b00000111_100)
|
else if(protect_address[23:13]==11'b00000111_100)
|
sector_reg[8] = 1'b1;
|
sector_reg[8] = 1'b1;
|
else if(protect_address[23:13]==11'b00000111_101)
|
else if(protect_address[23:13]==11'b00000111_101)
|
sector_reg[9] = 1'b1;
|
sector_reg[9] = 1'b1;
|
else if(protect_address[23:14]==10'b00000111_11)
|
else if(protect_address[23:14]==10'b00000111_11)
|
sector_reg[10] = 1'b1;
|
sector_reg[10] = 1'b1;
|
end
|
end
|
else if ((DEVICE == "AT26DF081A" || DEVICE == "AT26DF161A" || DEVICE == "AT26DF321") && protect==1'b1)
|
else if ((DEVICE == "AT26DF081A" || DEVICE == "AT26DF161A" || DEVICE == "AT26DF321") && protect==1'b1)
|
if(protect_address[23:16]==8'b00000111)
|
if(protect_address[23:16]==8'b00000111)
|
sector_reg[7] = 1'b1;
|
sector_reg[7] = 1'b1;
|
|
|
if ((DEVICE == "AT25DF041A" || DEVICE == "AT26DF081A"
|
if ((DEVICE == "AT25DF041A" || DEVICE == "AT26DF081A"
|
|| DEVICE == "AT26DF161A" || DEVICE == "AT26DF321") && protect==1'b1)
|
|| DEVICE == "AT26DF161A" || DEVICE == "AT26DF321") && protect==1'b1)
|
begin
|
begin
|
// if(protect_address[23:16]==8'b00000111)
|
// if(protect_address[23:16]==8'b00000111)
|
// sector_reg[7] = 1'b1;
|
// sector_reg[7] = 1'b1;
|
if(protect_address[23:16]==8'b00000110)
|
if(protect_address[23:16]==8'b00000110)
|
sector_reg[6] = 1'b1;
|
sector_reg[6] = 1'b1;
|
else if(protect_address[23:16]==8'b00000101)
|
else if(protect_address[23:16]==8'b00000101)
|
sector_reg[5] = 1'b1;
|
sector_reg[5] = 1'b1;
|
else if(protect_address[23:16]==8'b00000100)
|
else if(protect_address[23:16]==8'b00000100)
|
sector_reg[4] = 1'b1;
|
sector_reg[4] = 1'b1;
|
else if(protect_address[23:16]==8'b00000011)
|
else if(protect_address[23:16]==8'b00000011)
|
sector_reg[3] = 1'b1;
|
sector_reg[3] = 1'b1;
|
else if(protect_address[23:16]==8'b00000010)
|
else if(protect_address[23:16]==8'b00000010)
|
sector_reg[2] = 1'b1;
|
sector_reg[2] = 1'b1;
|
else if(protect_address[23:16]==8'b00000001)
|
else if(protect_address[23:16]==8'b00000001)
|
sector_reg[1] = 1'b1;
|
sector_reg[1] = 1'b1;
|
else if(protect_address[23:16]==8'b00000000)
|
else if(protect_address[23:16]==8'b00000000)
|
sector_reg[0] = 1'b1;
|
sector_reg[0] = 1'b1;
|
end
|
end
|
end
|
end
|
endtask
|
endtask
|
|
|
// Sector Unprotection
|
// Sector Unprotection
|
task unprotect_sector;
|
task unprotect_sector;
|
input [23:0] unprotect_address;
|
input [23:0] unprotect_address;
|
begin
|
begin
|
if ((DEVICE == "AT25DF041A") && unprotect==1'b1) // sectors of AT25DF041A
|
if ((DEVICE == "AT25DF041A") && unprotect==1'b1) // sectors of AT25DF041A
|
begin
|
begin
|
$display("Entered Unprotect sector for Device: AT25DF041A");
|
$display("Entered Unprotect sector for Device: AT25DF041A");
|
if(unprotect_address[23:14]==10'b00000111_11)
|
if(unprotect_address[23:14]==10'b00000111_11)
|
sector_reg[10] = 1'b0;
|
sector_reg[10] = 1'b0;
|
else if(unprotect_address[23:13]==11'b00000111_101)
|
else if(unprotect_address[23:13]==11'b00000111_101)
|
sector_reg[9] = 1'b0;
|
sector_reg[9] = 1'b0;
|
else if(unprotect_address[23:13]==11'b00000111_100)
|
else if(unprotect_address[23:13]==11'b00000111_100)
|
sector_reg[8] = 1'b0;
|
sector_reg[8] = 1'b0;
|
else if(unprotect_address[23:15]==9'b00000111_0)
|
else if(unprotect_address[23:15]==9'b00000111_0)
|
sector_reg[7] = 1'b0;
|
sector_reg[7] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000110)
|
else if(unprotect_address[23:16]==8'b00000110)
|
sector_reg[6] = 1'b0;
|
sector_reg[6] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000101)
|
else if(unprotect_address[23:16]==8'b00000101)
|
sector_reg[5] = 1'b0;
|
sector_reg[5] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000100)
|
else if(unprotect_address[23:16]==8'b00000100)
|
sector_reg[4] = 1'b0;
|
sector_reg[4] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000011)
|
else if(unprotect_address[23:16]==8'b00000011)
|
sector_reg[3] = 1'b0;
|
sector_reg[3] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000010)
|
else if(unprotect_address[23:16]==8'b00000010)
|
sector_reg[2] = 1'b0;
|
sector_reg[2] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000001)
|
else if(unprotect_address[23:16]==8'b00000001)
|
sector_reg[1] = 1'b0;
|
sector_reg[1] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000000)
|
else if(unprotect_address[23:16]==8'b00000000)
|
sector_reg[0] = 1'b0;
|
sector_reg[0] = 1'b0;
|
end
|
end
|
else if (DEVICE == "AT26DF081A" && unprotect==1'b1) // sectors of AT26DF081A
|
else if (DEVICE == "AT26DF081A" && unprotect==1'b1) // sectors of AT26DF081A
|
begin
|
begin
|
$display("Entered Unprotect sector for Device: AT26DF081A");
|
$display("Entered Unprotect sector for Device: AT26DF081A");
|
if(unprotect_address[23:17]==9'b00001111_1)
|
if(unprotect_address[23:17]==9'b00001111_1)
|
sector_reg[18] = 1'b0;
|
sector_reg[18] = 1'b0;
|
else if(unprotect_address[23:13]==11'b00001111_011)
|
else if(unprotect_address[23:13]==11'b00001111_011)
|
sector_reg[17] = 1'b0;
|
sector_reg[17] = 1'b0;
|
else if(unprotect_address[23:13]==11'b00001111_010)
|
else if(unprotect_address[23:13]==11'b00001111_010)
|
sector_reg[16] = 1'b0;
|
sector_reg[16] = 1'b0;
|
else if(unprotect_address[23:14]==10'b00001111_00)
|
else if(unprotect_address[23:14]==10'b00001111_00)
|
sector_reg[15] = 1'b0;
|
sector_reg[15] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001110)
|
else if(unprotect_address[23:16]==8'b00001110)
|
sector_reg[14] = 1'b0;
|
sector_reg[14] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001101)
|
else if(unprotect_address[23:16]==8'b00001101)
|
sector_reg[13] = 1'b0;
|
sector_reg[13] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001100)
|
else if(unprotect_address[23:16]==8'b00001100)
|
sector_reg[12] = 1'b0;
|
sector_reg[12] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001011)
|
else if(unprotect_address[23:16]==8'b00001011)
|
sector_reg[11] = 1'b0;
|
sector_reg[11] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001010)
|
else if(unprotect_address[23:16]==8'b00001010)
|
sector_reg[10] = 1'b0;
|
sector_reg[10] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001001)
|
else if(unprotect_address[23:16]==8'b00001001)
|
sector_reg[9] = 1'b0;
|
sector_reg[9] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001000)
|
else if(unprotect_address[23:16]==8'b00001000)
|
sector_reg[8] = 1'b0;
|
sector_reg[8] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000111)
|
else if(unprotect_address[23:16]==8'b00000111)
|
sector_reg[7] = 1'b0;
|
sector_reg[7] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000110)
|
else if(unprotect_address[23:16]==8'b00000110)
|
sector_reg[6] = 1'b0;
|
sector_reg[6] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000101)
|
else if(unprotect_address[23:16]==8'b00000101)
|
sector_reg[5] = 1'b0;
|
sector_reg[5] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000100)
|
else if(unprotect_address[23:16]==8'b00000100)
|
sector_reg[4] = 1'b0;
|
sector_reg[4] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000011)
|
else if(unprotect_address[23:16]==8'b00000011)
|
sector_reg[3] = 1'b0;
|
sector_reg[3] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000010)
|
else if(unprotect_address[23:16]==8'b00000010)
|
sector_reg[2] = 1'b0;
|
sector_reg[2] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000001)
|
else if(unprotect_address[23:16]==8'b00000001)
|
sector_reg[1] = 1'b0;
|
sector_reg[1] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000000)
|
else if(unprotect_address[23:16]==8'b00000000)
|
sector_reg[0] = 1'b0;
|
sector_reg[0] = 1'b0;
|
end
|
end
|
else if ((DEVICE == "AT26DF161A") && unprotect==1'b1) // sectors of AT26DF161A
|
else if ((DEVICE == "AT26DF161A") && unprotect==1'b1) // sectors of AT26DF161A
|
begin
|
begin
|
$display("Entered Unprotect sector for Device: AT26DF161A");
|
$display("Entered Unprotect sector for Device: AT26DF161A");
|
if(unprotect_address[23:16]==8'b00011111)
|
if(unprotect_address[23:16]==8'b00011111)
|
sector_reg[31] = 1'b0;
|
sector_reg[31] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011110)
|
else if(unprotect_address[23:16]==8'b00011110)
|
sector_reg[30] = 1'b0;
|
sector_reg[30] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011101)
|
else if(unprotect_address[23:16]==8'b00011101)
|
sector_reg[29] = 1'b0;
|
sector_reg[29] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011100)
|
else if(unprotect_address[23:16]==8'b00011100)
|
sector_reg[28] = 1'b0;
|
sector_reg[28] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011011)
|
else if(unprotect_address[23:16]==8'b00011011)
|
sector_reg[27] = 1'b0;
|
sector_reg[27] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011010)
|
else if(unprotect_address[23:16]==8'b00011010)
|
sector_reg[26] = 1'b0;
|
sector_reg[26] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011001)
|
else if(unprotect_address[23:16]==8'b00011001)
|
sector_reg[25] = 1'b0;
|
sector_reg[25] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011000)
|
else if(unprotect_address[23:16]==8'b00011000)
|
sector_reg[24] = 1'b0;
|
sector_reg[24] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010111)
|
else if(unprotect_address[23:16]==8'b00010111)
|
sector_reg[23] = 1'b0;
|
sector_reg[23] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010110)
|
else if(unprotect_address[23:16]==8'b00010110)
|
sector_reg[22] = 1'b0;
|
sector_reg[22] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010101)
|
else if(unprotect_address[23:16]==8'b00010101)
|
sector_reg[21] = 1'b0;
|
sector_reg[21] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010100)
|
else if(unprotect_address[23:16]==8'b00010100)
|
sector_reg[20] = 1'b0;
|
sector_reg[20] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010011)
|
else if(unprotect_address[23:16]==8'b00010011)
|
sector_reg[19] = 1'b0;
|
sector_reg[19] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010010)
|
else if(unprotect_address[23:16]==8'b00010010)
|
sector_reg[18] = 1'b0;
|
sector_reg[18] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010001)
|
else if(unprotect_address[23:16]==8'b00010001)
|
sector_reg[17] = 1'b0;
|
sector_reg[17] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010000)
|
else if(unprotect_address[23:16]==8'b00010000)
|
sector_reg[16] = 1'b0;
|
sector_reg[16] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001111)
|
else if(unprotect_address[23:16]==8'b00001111)
|
sector_reg[15] = 1'b0;
|
sector_reg[15] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001110)
|
else if(unprotect_address[23:16]==8'b00001110)
|
sector_reg[14] = 1'b0;
|
sector_reg[14] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001101)
|
else if(unprotect_address[23:16]==8'b00001101)
|
sector_reg[13] = 1'b0;
|
sector_reg[13] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001100)
|
else if(unprotect_address[23:16]==8'b00001100)
|
sector_reg[12] = 1'b0;
|
sector_reg[12] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001011)
|
else if(unprotect_address[23:16]==8'b00001011)
|
sector_reg[11] = 1'b0;
|
sector_reg[11] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001010)
|
else if(unprotect_address[23:16]==8'b00001010)
|
sector_reg[10] = 1'b0;
|
sector_reg[10] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001001)
|
else if(unprotect_address[23:16]==8'b00001001)
|
sector_reg[9] = 1'b0;
|
sector_reg[9] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001000)
|
else if(unprotect_address[23:16]==8'b00001000)
|
sector_reg[8] = 1'b0;
|
sector_reg[8] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000111)
|
else if(unprotect_address[23:16]==8'b00000111)
|
sector_reg[7] = 1'b0;
|
sector_reg[7] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000110)
|
else if(unprotect_address[23:16]==8'b00000110)
|
sector_reg[6] = 1'b0;
|
sector_reg[6] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000101)
|
else if(unprotect_address[23:16]==8'b00000101)
|
sector_reg[5] = 1'b0;
|
sector_reg[5] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000100)
|
else if(unprotect_address[23:16]==8'b00000100)
|
sector_reg[4] = 1'b0;
|
sector_reg[4] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000011)
|
else if(unprotect_address[23:16]==8'b00000011)
|
sector_reg[3] = 1'b0;
|
sector_reg[3] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000010)
|
else if(unprotect_address[23:16]==8'b00000010)
|
sector_reg[2] = 1'b0;
|
sector_reg[2] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000001)
|
else if(unprotect_address[23:16]==8'b00000001)
|
sector_reg[1] = 1'b0;
|
sector_reg[1] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000000)
|
else if(unprotect_address[23:16]==8'b00000000)
|
sector_reg[0] = 1'b0;
|
sector_reg[0] = 1'b0;
|
end
|
end
|
else if (DEVICE == "AT26DF321" && unprotect==1'b1) // sectors of AT26DF321
|
else if (DEVICE == "AT26DF321" && unprotect==1'b1) // sectors of AT26DF321
|
begin
|
begin
|
$display("Entered Unprotect sector for Device: AT26DF321");
|
$display("Entered Unprotect sector for Device: AT26DF321");
|
if(unprotect_address[23:16]==8'b00111111)
|
if(unprotect_address[23:16]==8'b00111111)
|
sector_reg[63] = 1'b0;
|
sector_reg[63] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00111110)
|
else if(unprotect_address[23:16]==8'b00111110)
|
sector_reg[62] = 1'b0;
|
sector_reg[62] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00111101)
|
else if(unprotect_address[23:16]==8'b00111101)
|
sector_reg[61] = 1'b0;
|
sector_reg[61] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00111100)
|
else if(unprotect_address[23:16]==8'b00111100)
|
sector_reg[60] = 1'b0;
|
sector_reg[60] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00111011)
|
else if(unprotect_address[23:16]==8'b00111011)
|
sector_reg[59] = 1'b0;
|
sector_reg[59] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00111010)
|
else if(unprotect_address[23:16]==8'b00111010)
|
sector_reg[58] = 1'b0;
|
sector_reg[58] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00111001)
|
else if(unprotect_address[23:16]==8'b00111001)
|
sector_reg[57] = 1'b0;
|
sector_reg[57] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00111000)
|
else if(unprotect_address[23:16]==8'b00111000)
|
sector_reg[56] = 1'b0;
|
sector_reg[56] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00110111)
|
else if(unprotect_address[23:16]==8'b00110111)
|
sector_reg[55] = 1'b0;
|
sector_reg[55] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00110110)
|
else if(unprotect_address[23:16]==8'b00110110)
|
sector_reg[54] = 1'b0;
|
sector_reg[54] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00110101)
|
else if(unprotect_address[23:16]==8'b00110101)
|
sector_reg[53] = 1'b0;
|
sector_reg[53] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00110100)
|
else if(unprotect_address[23:16]==8'b00110100)
|
sector_reg[52] = 1'b0;
|
sector_reg[52] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00110011)
|
else if(unprotect_address[23:16]==8'b00110011)
|
sector_reg[51] = 1'b0;
|
sector_reg[51] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00110010)
|
else if(unprotect_address[23:16]==8'b00110010)
|
sector_reg[50] = 1'b0;
|
sector_reg[50] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00110001)
|
else if(unprotect_address[23:16]==8'b00110001)
|
sector_reg[49] = 1'b0;
|
sector_reg[49] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00110000)
|
else if(unprotect_address[23:16]==8'b00110000)
|
sector_reg[48] = 1'b0;
|
sector_reg[48] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00101111)
|
else if(unprotect_address[23:16]==8'b00101111)
|
sector_reg[47] = 1'b0;
|
sector_reg[47] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00101110)
|
else if(unprotect_address[23:16]==8'b00101110)
|
sector_reg[46] = 1'b0;
|
sector_reg[46] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00101101)
|
else if(unprotect_address[23:16]==8'b00101101)
|
sector_reg[45] = 1'b0;
|
sector_reg[45] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00101100)
|
else if(unprotect_address[23:16]==8'b00101100)
|
sector_reg[44] = 1'b0;
|
sector_reg[44] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00101011)
|
else if(unprotect_address[23:16]==8'b00101011)
|
sector_reg[43] = 1'b0;
|
sector_reg[43] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00101010)
|
else if(unprotect_address[23:16]==8'b00101010)
|
sector_reg[42] = 1'b0;
|
sector_reg[42] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00101001)
|
else if(unprotect_address[23:16]==8'b00101001)
|
sector_reg[41] = 1'b0;
|
sector_reg[41] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00101000)
|
else if(unprotect_address[23:16]==8'b00101000)
|
sector_reg[40] = 1'b0;
|
sector_reg[40] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00100111)
|
else if(unprotect_address[23:16]==8'b00100111)
|
sector_reg[39] = 1'b0;
|
sector_reg[39] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00100110)
|
else if(unprotect_address[23:16]==8'b00100110)
|
sector_reg[38] = 1'b0;
|
sector_reg[38] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00100101)
|
else if(unprotect_address[23:16]==8'b00100101)
|
sector_reg[37] = 1'b0;
|
sector_reg[37] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00100100)
|
else if(unprotect_address[23:16]==8'b00100100)
|
sector_reg[36] = 1'b0;
|
sector_reg[36] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00100011)
|
else if(unprotect_address[23:16]==8'b00100011)
|
sector_reg[35] = 1'b0;
|
sector_reg[35] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00100010)
|
else if(unprotect_address[23:16]==8'b00100010)
|
sector_reg[34] = 1'b0;
|
sector_reg[34] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00100001)
|
else if(unprotect_address[23:16]==8'b00100001)
|
sector_reg[33] = 1'b0;
|
sector_reg[33] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00100000)
|
else if(unprotect_address[23:16]==8'b00100000)
|
sector_reg[32] = 1'b0;
|
sector_reg[32] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011111)
|
else if(unprotect_address[23:16]==8'b00011111)
|
sector_reg[31] = 1'b0;
|
sector_reg[31] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011110)
|
else if(unprotect_address[23:16]==8'b00011110)
|
sector_reg[30] = 1'b0;
|
sector_reg[30] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011101)
|
else if(unprotect_address[23:16]==8'b00011101)
|
sector_reg[29] = 1'b0;
|
sector_reg[29] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011100)
|
else if(unprotect_address[23:16]==8'b00011100)
|
sector_reg[28] = 1'b0;
|
sector_reg[28] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011011)
|
else if(unprotect_address[23:16]==8'b00011011)
|
sector_reg[27] = 1'b0;
|
sector_reg[27] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011010)
|
else if(unprotect_address[23:16]==8'b00011010)
|
sector_reg[26] = 1'b0;
|
sector_reg[26] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011001)
|
else if(unprotect_address[23:16]==8'b00011001)
|
sector_reg[25] = 1'b0;
|
sector_reg[25] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00011000)
|
else if(unprotect_address[23:16]==8'b00011000)
|
sector_reg[24] = 1'b0;
|
sector_reg[24] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010111)
|
else if(unprotect_address[23:16]==8'b00010111)
|
sector_reg[23] = 1'b0;
|
sector_reg[23] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010110)
|
else if(unprotect_address[23:16]==8'b00010110)
|
sector_reg[22] = 1'b0;
|
sector_reg[22] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010101)
|
else if(unprotect_address[23:16]==8'b00010101)
|
sector_reg[21] = 1'b0;
|
sector_reg[21] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010100)
|
else if(unprotect_address[23:16]==8'b00010100)
|
sector_reg[20] = 1'b0;
|
sector_reg[20] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010011)
|
else if(unprotect_address[23:16]==8'b00010011)
|
sector_reg[19] = 1'b0;
|
sector_reg[19] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010010)
|
else if(unprotect_address[23:16]==8'b00010010)
|
sector_reg[18] = 1'b0;
|
sector_reg[18] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010001)
|
else if(unprotect_address[23:16]==8'b00010001)
|
sector_reg[17] = 1'b0;
|
sector_reg[17] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00010000)
|
else if(unprotect_address[23:16]==8'b00010000)
|
sector_reg[16] = 1'b0;
|
sector_reg[16] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001111)
|
else if(unprotect_address[23:16]==8'b00001111)
|
sector_reg[15] = 1'b0;
|
sector_reg[15] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001110)
|
else if(unprotect_address[23:16]==8'b00001110)
|
sector_reg[14] = 1'b0;
|
sector_reg[14] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001101)
|
else if(unprotect_address[23:16]==8'b00001101)
|
sector_reg[13] = 1'b0;
|
sector_reg[13] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001100)
|
else if(unprotect_address[23:16]==8'b00001100)
|
sector_reg[12] = 1'b0;
|
sector_reg[12] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001011)
|
else if(unprotect_address[23:16]==8'b00001011)
|
sector_reg[11] = 1'b0;
|
sector_reg[11] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001010)
|
else if(unprotect_address[23:16]==8'b00001010)
|
sector_reg[10] = 1'b0;
|
sector_reg[10] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001001)
|
else if(unprotect_address[23:16]==8'b00001001)
|
sector_reg[9] = 1'b0;
|
sector_reg[9] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00001000)
|
else if(unprotect_address[23:16]==8'b00001000)
|
sector_reg[8] = 1'b0;
|
sector_reg[8] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000111)
|
else if(unprotect_address[23:16]==8'b00000111)
|
sector_reg[7] = 1'b0;
|
sector_reg[7] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000110)
|
else if(unprotect_address[23:16]==8'b00000110)
|
sector_reg[6] = 1'b0;
|
sector_reg[6] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000101)
|
else if(unprotect_address[23:16]==8'b00000101)
|
sector_reg[5] = 1'b0;
|
sector_reg[5] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000100)
|
else if(unprotect_address[23:16]==8'b00000100)
|
sector_reg[4] = 1'b0;
|
sector_reg[4] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000011)
|
else if(unprotect_address[23:16]==8'b00000011)
|
sector_reg[3] = 1'b0;
|
sector_reg[3] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000010)
|
else if(unprotect_address[23:16]==8'b00000010)
|
sector_reg[2] = 1'b0;
|
sector_reg[2] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000001)
|
else if(unprotect_address[23:16]==8'b00000001)
|
sector_reg[1] = 1'b0;
|
sector_reg[1] = 1'b0;
|
else if(unprotect_address[23:16]==8'b00000000)
|
else if(unprotect_address[23:16]==8'b00000000)
|
sector_reg[0] = 1'b0;
|
sector_reg[0] = 1'b0;
|
end
|
end
|
else
|
else
|
$display("Unprotect Sector failed");
|
$display("Unprotect Sector failed");
|
|
|
end
|
end
|
endtask
|
endtask
|
|
|
// Check Sector Protection
|
// Check Sector Protection
|
task check_protection;
|
task check_protection;
|
input [23:0] check_address;
|
input [23:0] check_address;
|
begin
|
begin
|
if (DEVICE == "AT26DF321")
|
if (DEVICE == "AT26DF321")
|
begin
|
begin
|
if((check_address[23:16]==8'b00111111 && sector_reg[63]==1'b1)
|
if((check_address[23:16]==8'b00111111 && sector_reg[63]==1'b1)
|
|| (check_address[23:16]==8'b00111110 && sector_reg[62]==1'b1)
|
|| (check_address[23:16]==8'b00111110 && sector_reg[62]==1'b1)
|
|| (check_address[23:16]==8'b00111101 && sector_reg[61]==1'b1)
|
|| (check_address[23:16]==8'b00111101 && sector_reg[61]==1'b1)
|
|| (check_address[23:16]==8'b00111100 && sector_reg[60]==1'b1)
|
|| (check_address[23:16]==8'b00111100 && sector_reg[60]==1'b1)
|
|| (check_address[23:16]==8'b00111011 && sector_reg[59]==1'b1)
|
|| (check_address[23:16]==8'b00111011 && sector_reg[59]==1'b1)
|
|| (check_address[23:16]==8'b00111010 && sector_reg[58]==1'b1)
|
|| (check_address[23:16]==8'b00111010 && sector_reg[58]==1'b1)
|
|| (check_address[23:16]==8'b00111001 && sector_reg[57]==1'b1)
|
|| (check_address[23:16]==8'b00111001 && sector_reg[57]==1'b1)
|
|| (check_address[23:16]==8'b00111000 && sector_reg[56]==1'b1)
|
|| (check_address[23:16]==8'b00111000 && sector_reg[56]==1'b1)
|
|| (check_address[23:16]==8'b00110111 && sector_reg[55]==1'b1)
|
|| (check_address[23:16]==8'b00110111 && sector_reg[55]==1'b1)
|
|| (check_address[23:16]==8'b00110110 && sector_reg[54]==1'b1)
|
|| (check_address[23:16]==8'b00110110 && sector_reg[54]==1'b1)
|
|| (check_address[23:16]==8'b00110101 && sector_reg[53]==1'b1)
|
|| (check_address[23:16]==8'b00110101 && sector_reg[53]==1'b1)
|
|| (check_address[23:16]==8'b00110100 && sector_reg[52]==1'b1)
|
|| (check_address[23:16]==8'b00110100 && sector_reg[52]==1'b1)
|
|| (check_address[23:16]==8'b00110011 && sector_reg[51]==1'b1)
|
|| (check_address[23:16]==8'b00110011 && sector_reg[51]==1'b1)
|
|| (check_address[23:16]==8'b00110010 && sector_reg[50]==1'b1)
|
|| (check_address[23:16]==8'b00110010 && sector_reg[50]==1'b1)
|
|| (check_address[23:16]==8'b00110001 && sector_reg[49]==1'b1)
|
|| (check_address[23:16]==8'b00110001 && sector_reg[49]==1'b1)
|
|| (check_address[23:16]==8'b00110000 && sector_reg[48]==1'b1)
|
|| (check_address[23:16]==8'b00110000 && sector_reg[48]==1'b1)
|
|| (check_address[23:16]==8'b00101111 && sector_reg[47]==1'b1)
|
|| (check_address[23:16]==8'b00101111 && sector_reg[47]==1'b1)
|
|| (check_address[23:16]==8'b00101110 && sector_reg[46]==1'b1)
|
|| (check_address[23:16]==8'b00101110 && sector_reg[46]==1'b1)
|
|| (check_address[23:16]==8'b00101101 && sector_reg[45]==1'b1)
|
|| (check_address[23:16]==8'b00101101 && sector_reg[45]==1'b1)
|
|| (check_address[23:16]==8'b00101100 && sector_reg[44]==1'b1)
|
|| (check_address[23:16]==8'b00101100 && sector_reg[44]==1'b1)
|
|| (check_address[23:16]==8'b00101011 && sector_reg[43]==1'b1)
|
|| (check_address[23:16]==8'b00101011 && sector_reg[43]==1'b1)
|
|| (check_address[23:16]==8'b00101010 && sector_reg[42]==1'b1)
|
|| (check_address[23:16]==8'b00101010 && sector_reg[42]==1'b1)
|
|| (check_address[23:16]==8'b00101001 && sector_reg[41]==1'b1)
|
|| (check_address[23:16]==8'b00101001 && sector_reg[41]==1'b1)
|
|| (check_address[23:16]==8'b00101000 && sector_reg[40]==1'b1)
|
|| (check_address[23:16]==8'b00101000 && sector_reg[40]==1'b1)
|
|| (check_address[23:16]==8'b00100111 && sector_reg[39]==1'b1)
|
|| (check_address[23:16]==8'b00100111 && sector_reg[39]==1'b1)
|
|| (check_address[23:16]==8'b00100110 && sector_reg[38]==1'b1)
|
|| (check_address[23:16]==8'b00100110 && sector_reg[38]==1'b1)
|
|| (check_address[23:16]==8'b00100101 && sector_reg[37]==1'b1)
|
|| (check_address[23:16]==8'b00100101 && sector_reg[37]==1'b1)
|
|| (check_address[23:16]==8'b00100100 && sector_reg[36]==1'b1)
|
|| (check_address[23:16]==8'b00100100 && sector_reg[36]==1'b1)
|
|| (check_address[23:16]==8'b00100011 && sector_reg[35]==1'b1)
|
|| (check_address[23:16]==8'b00100011 && sector_reg[35]==1'b1)
|
|| (check_address[23:16]==8'b00100010 && sector_reg[34]==1'b1)
|
|| (check_address[23:16]==8'b00100010 && sector_reg[34]==1'b1)
|
|| (check_address[23:16]==8'b00100001 && sector_reg[33]==1'b1)
|
|| (check_address[23:16]==8'b00100001 && sector_reg[33]==1'b1)
|
|| (check_address[23:16]==8'b00100000 && sector_reg[32]==1'b1)
|
|| (check_address[23:16]==8'b00100000 && sector_reg[32]==1'b1)
|
|| (check_address[23:16]==8'b00011111 && sector_reg[31]==1'b1)
|
|| (check_address[23:16]==8'b00011111 && sector_reg[31]==1'b1)
|
|| (check_address[23:16]==8'b00011110 && sector_reg[30]==1'b1)
|
|| (check_address[23:16]==8'b00011110 && sector_reg[30]==1'b1)
|
|| (check_address[23:16]==8'b00011101 && sector_reg[29]==1'b1)
|
|| (check_address[23:16]==8'b00011101 && sector_reg[29]==1'b1)
|
|| (check_address[23:16]==8'b00011100 && sector_reg[28]==1'b1)
|
|| (check_address[23:16]==8'b00011100 && sector_reg[28]==1'b1)
|
|| (check_address[23:16]==8'b00011011 && sector_reg[27]==1'b1)
|
|| (check_address[23:16]==8'b00011011 && sector_reg[27]==1'b1)
|
|| (check_address[23:16]==8'b00011010 && sector_reg[26]==1'b1)
|
|| (check_address[23:16]==8'b00011010 && sector_reg[26]==1'b1)
|
|| (check_address[23:16]==8'b00011001 && sector_reg[25]==1'b1)
|
|| (check_address[23:16]==8'b00011001 && sector_reg[25]==1'b1)
|
|| (check_address[23:16]==8'b00011000 && sector_reg[24]==1'b1)
|
|| (check_address[23:16]==8'b00011000 && sector_reg[24]==1'b1)
|
|| (check_address[23:16]==8'b00010111 && sector_reg[23]==1'b1)
|
|| (check_address[23:16]==8'b00010111 && sector_reg[23]==1'b1)
|
|| (check_address[23:16]==8'b00010110 && sector_reg[22]==1'b1)
|
|| (check_address[23:16]==8'b00010110 && sector_reg[22]==1'b1)
|
|| (check_address[23:16]==8'b00010101 && sector_reg[21]==1'b1)
|
|| (check_address[23:16]==8'b00010101 && sector_reg[21]==1'b1)
|
|| (check_address[23:16]==8'b00010100 && sector_reg[20]==1'b1)
|
|| (check_address[23:16]==8'b00010100 && sector_reg[20]==1'b1)
|
|| (check_address[23:16]==8'b00010011 && sector_reg[19]==1'b1)
|
|| (check_address[23:16]==8'b00010011 && sector_reg[19]==1'b1)
|
|| (check_address[23:16]==8'b00010010 && sector_reg[18]==1'b1)
|
|| (check_address[23:16]==8'b00010010 && sector_reg[18]==1'b1)
|
|| (check_address[23:16]==8'b00010001 && sector_reg[17]==1'b1)
|
|| (check_address[23:16]==8'b00010001 && sector_reg[17]==1'b1)
|
|| (check_address[23:16]==8'b00010000 && sector_reg[16]==1'b1)
|
|| (check_address[23:16]==8'b00010000 && sector_reg[16]==1'b1)
|
|| (check_address[23:16]==8'b00001111 && sector_reg[15]==1'b1)
|
|| (check_address[23:16]==8'b00001111 && sector_reg[15]==1'b1)
|
|| (check_address[23:16]==8'b00001110 && sector_reg[14]==1'b1)
|
|| (check_address[23:16]==8'b00001110 && sector_reg[14]==1'b1)
|
|| (check_address[23:16]==8'b00001101 && sector_reg[13]==1'b1)
|
|| (check_address[23:16]==8'b00001101 && sector_reg[13]==1'b1)
|
|| (check_address[23:16]==8'b00001100 && sector_reg[12]==1'b1)
|
|| (check_address[23:16]==8'b00001100 && sector_reg[12]==1'b1)
|
|| (check_address[23:16]==8'b00001011 && sector_reg[11]==1'b1)
|
|| (check_address[23:16]==8'b00001011 && sector_reg[11]==1'b1)
|
|| (check_address[23:16]==8'b00001010 && sector_reg[10]==1'b1)
|
|| (check_address[23:16]==8'b00001010 && sector_reg[10]==1'b1)
|
|| (check_address[23:16]==8'b00001001 && sector_reg[9] ==1'b1)
|
|| (check_address[23:16]==8'b00001001 && sector_reg[9] ==1'b1)
|
|| (check_address[23:16]==8'b00001000 && sector_reg[8] ==1'b1)
|
|| (check_address[23:16]==8'b00001000 && sector_reg[8] ==1'b1)
|
|| (check_address[23:16]==8'b00000111 && sector_reg[7] ==1'b1)
|
|| (check_address[23:16]==8'b00000111 && sector_reg[7] ==1'b1)
|
|| (check_address[23:16]==8'b00000110 && sector_reg[6] ==1'b1)
|
|| (check_address[23:16]==8'b00000110 && sector_reg[6] ==1'b1)
|
|| (check_address[23:16]==8'b00000101 && sector_reg[5] ==1'b1)
|
|| (check_address[23:16]==8'b00000101 && sector_reg[5] ==1'b1)
|
|| (check_address[23:16]==8'b00000100 && sector_reg[4] ==1'b1)
|
|| (check_address[23:16]==8'b00000100 && sector_reg[4] ==1'b1)
|
|| (check_address[23:16]==8'b00000011 && sector_reg[3] ==1'b1)
|
|| (check_address[23:16]==8'b00000011 && sector_reg[3] ==1'b1)
|
|| (check_address[23:16]==8'b00000010 && sector_reg[2] ==1'b1)
|
|| (check_address[23:16]==8'b00000010 && sector_reg[2] ==1'b1)
|
|| (check_address[23:16]==8'b00000001 && sector_reg[1] ==1'b1)
|
|| (check_address[23:16]==8'b00000001 && sector_reg[1] ==1'b1)
|
|| (check_address[23:16]==8'b00000000 && sector_reg[0] ==1'b1))
|
|| (check_address[23:16]==8'b00000000 && sector_reg[0] ==1'b1))
|
protected = 1'b1;
|
protected = 1'b1;
|
else
|
else
|
protected = 1'b0;
|
protected = 1'b0;
|
end
|
end
|
else if (DEVICE == "AT26DF161A")
|
else if (DEVICE == "AT26DF161A")
|
begin
|
begin
|
if((check_address[23:16]==8'b00011111 && sector_reg[31]==1'b1)
|
if((check_address[23:16]==8'b00011111 && sector_reg[31]==1'b1)
|
|| (check_address[23:16]==8'b00011110 && sector_reg[30]==1'b1)
|
|| (check_address[23:16]==8'b00011110 && sector_reg[30]==1'b1)
|
|| (check_address[23:16]==8'b00011101 && sector_reg[29]==1'b1)
|
|| (check_address[23:16]==8'b00011101 && sector_reg[29]==1'b1)
|
|| (check_address[23:16]==8'b00011100 && sector_reg[28]==1'b1)
|
|| (check_address[23:16]==8'b00011100 && sector_reg[28]==1'b1)
|
|| (check_address[23:16]==8'b00011011 && sector_reg[27]==1'b1)
|
|| (check_address[23:16]==8'b00011011 && sector_reg[27]==1'b1)
|
|| (check_address[23:16]==8'b00011010 && sector_reg[26]==1'b1)
|
|| (check_address[23:16]==8'b00011010 && sector_reg[26]==1'b1)
|
|| (check_address[23:16]==8'b00011001 && sector_reg[25]==1'b1)
|
|| (check_address[23:16]==8'b00011001 && sector_reg[25]==1'b1)
|
|| (check_address[23:16]==8'b00011000 && sector_reg[24]==1'b1)
|
|| (check_address[23:16]==8'b00011000 && sector_reg[24]==1'b1)
|
|| (check_address[23:16]==8'b00010111 && sector_reg[23]==1'b1)
|
|| (check_address[23:16]==8'b00010111 && sector_reg[23]==1'b1)
|
|| (check_address[23:16]==8'b00010110 && sector_reg[22]==1'b1)
|
|| (check_address[23:16]==8'b00010110 && sector_reg[22]==1'b1)
|
|| (check_address[23:16]==8'b00010101 && sector_reg[21]==1'b1)
|
|| (check_address[23:16]==8'b00010101 && sector_reg[21]==1'b1)
|
|| (check_address[23:16]==8'b00010100 && sector_reg[20]==1'b1)
|
|| (check_address[23:16]==8'b00010100 && sector_reg[20]==1'b1)
|
|| (check_address[23:16]==8'b00010011 && sector_reg[19]==1'b1)
|
|| (check_address[23:16]==8'b00010011 && sector_reg[19]==1'b1)
|
|| (check_address[23:16]==8'b00010010 && sector_reg[18]==1'b1)
|
|| (check_address[23:16]==8'b00010010 && sector_reg[18]==1'b1)
|
|| (check_address[23:16]==8'b00010001 && sector_reg[17]==1'b1)
|
|| (check_address[23:16]==8'b00010001 && sector_reg[17]==1'b1)
|
|| (check_address[23:16]==8'b00010000 && sector_reg[16]==1'b1)
|
|| (check_address[23:16]==8'b00010000 && sector_reg[16]==1'b1)
|
|| (check_address[23:16]==8'b00001111 && sector_reg[15]==1'b1)
|
|| (check_address[23:16]==8'b00001111 && sector_reg[15]==1'b1)
|
|| (check_address[23:16]==8'b00001110 && sector_reg[14]==1'b1)
|
|| (check_address[23:16]==8'b00001110 && sector_reg[14]==1'b1)
|
|| (check_address[23:16]==8'b00001101 && sector_reg[13]==1'b1)
|
|| (check_address[23:16]==8'b00001101 && sector_reg[13]==1'b1)
|
|| (check_address[23:16]==8'b00001100 && sector_reg[12]==1'b1)
|
|| (check_address[23:16]==8'b00001100 && sector_reg[12]==1'b1)
|
|| (check_address[23:16]==8'b00001011 && sector_reg[11]==1'b1)
|
|| (check_address[23:16]==8'b00001011 && sector_reg[11]==1'b1)
|
|| (check_address[23:16]==8'b00001010 && sector_reg[10]==1'b1)
|
|| (check_address[23:16]==8'b00001010 && sector_reg[10]==1'b1)
|
|| (check_address[23:16]==8'b00001001 && sector_reg[9] ==1'b1)
|
|| (check_address[23:16]==8'b00001001 && sector_reg[9] ==1'b1)
|
|| (check_address[23:16]==8'b00001000 && sector_reg[8] ==1'b1)
|
|| (check_address[23:16]==8'b00001000 && sector_reg[8] ==1'b1)
|
|| (check_address[23:16]==8'b00000111 && sector_reg[7] ==1'b1)
|
|| (check_address[23:16]==8'b00000111 && sector_reg[7] ==1'b1)
|
|| (check_address[23:16]==8'b00000110 && sector_reg[6] ==1'b1)
|
|| (check_address[23:16]==8'b00000110 && sector_reg[6] ==1'b1)
|
|| (check_address[23:16]==8'b00000101 && sector_reg[5] ==1'b1)
|
|| (check_address[23:16]==8'b00000101 && sector_reg[5] ==1'b1)
|
|| (check_address[23:16]==8'b00000100 && sector_reg[4] ==1'b1)
|
|| (check_address[23:16]==8'b00000100 && sector_reg[4] ==1'b1)
|
|| (check_address[23:16]==8'b00000011 && sector_reg[3] ==1'b1)
|
|| (check_address[23:16]==8'b00000011 && sector_reg[3] ==1'b1)
|
|| (check_address[23:16]==8'b00000010 && sector_reg[2] ==1'b1)
|
|| (check_address[23:16]==8'b00000010 && sector_reg[2] ==1'b1)
|
|| (check_address[23:16]==8'b00000001 && sector_reg[1] ==1'b1)
|
|| (check_address[23:16]==8'b00000001 && sector_reg[1] ==1'b1)
|
|| (check_address[23:16]==8'b00000000 && sector_reg[0] ==1'b1))
|
|| (check_address[23:16]==8'b00000000 && sector_reg[0] ==1'b1))
|
protected = 1'b1;
|
protected = 1'b1;
|
else
|
else
|
protected = 1'b0;
|
protected = 1'b0;
|
end
|
end
|
else if (DEVICE == "AT26DF081A") // un-uniform sectors of AT26DF081A
|
else if (DEVICE == "AT26DF081A") // un-uniform sectors of AT26DF081A
|
begin
|
begin
|
if((check_address[23:17]==9'b00001111_1 && sector_reg[18] ==1'b1)
|
if((check_address[23:17]==9'b00001111_1 && sector_reg[18] ==1'b1)
|
|| (check_address[23:13]==11'b00001111_011 && sector_reg[17]==1'b1)
|
|| (check_address[23:13]==11'b00001111_011 && sector_reg[17]==1'b1)
|
|| (check_address[23:13]==11'b00001111_010 && sector_reg[16]==1'b1)
|
|| (check_address[23:13]==11'b00001111_010 && sector_reg[16]==1'b1)
|
|| (check_address[23:14]==10'b00001111_00 && sector_reg[15] ==1'b1)
|
|| (check_address[23:14]==10'b00001111_00 && sector_reg[15] ==1'b1)
|
|| (check_address[23:16]==8'b00001110 && sector_reg[14]==1'b1)
|
|| (check_address[23:16]==8'b00001110 && sector_reg[14]==1'b1)
|
|| (check_address[23:16]==8'b00001101 && sector_reg[13]==1'b1)
|
|| (check_address[23:16]==8'b00001101 && sector_reg[13]==1'b1)
|
|| (check_address[23:16]==8'b00001100 && sector_reg[12]==1'b1)
|
|| (check_address[23:16]==8'b00001100 && sector_reg[12]==1'b1)
|
|| (check_address[23:16]==8'b00001011 && sector_reg[11]==1'b1)
|
|| (check_address[23:16]==8'b00001011 && sector_reg[11]==1'b1)
|
|| (check_address[23:16]==8'b00001010 && sector_reg[10]==1'b1)
|
|| (check_address[23:16]==8'b00001010 && sector_reg[10]==1'b1)
|
|| (check_address[23:16]==8'b00001001 && sector_reg[9] ==1'b1)
|
|| (check_address[23:16]==8'b00001001 && sector_reg[9] ==1'b1)
|
|| (check_address[23:16]==8'b00001000 && sector_reg[8] ==1'b1)
|
|| (check_address[23:16]==8'b00001000 && sector_reg[8] ==1'b1)
|
|| (check_address[23:16]==8'b00000111 && sector_reg[7] ==1'b1)
|
|| (check_address[23:16]==8'b00000111 && sector_reg[7] ==1'b1)
|
|| (check_address[23:16]==8'b00000110 && sector_reg[6] ==1'b1)
|
|| (check_address[23:16]==8'b00000110 && sector_reg[6] ==1'b1)
|
|| (check_address[23:16]==8'b00000101 && sector_reg[5] ==1'b1)
|
|| (check_address[23:16]==8'b00000101 && sector_reg[5] ==1'b1)
|
|| (check_address[23:16]==8'b00000100 && sector_reg[4] ==1'b1)
|
|| (check_address[23:16]==8'b00000100 && sector_reg[4] ==1'b1)
|
|| (check_address[23:16]==8'b00000011 && sector_reg[3] ==1'b1)
|
|| (check_address[23:16]==8'b00000011 && sector_reg[3] ==1'b1)
|
|| (check_address[23:16]==8'b00000010 && sector_reg[2] ==1'b1)
|
|| (check_address[23:16]==8'b00000010 && sector_reg[2] ==1'b1)
|
|| (check_address[23:16]==8'b00000001 && sector_reg[1] ==1'b1)
|
|| (check_address[23:16]==8'b00000001 && sector_reg[1] ==1'b1)
|
|| (check_address[23:16]==8'b00000000 && sector_reg[0] ==1'b1))
|
|| (check_address[23:16]==8'b00000000 && sector_reg[0] ==1'b1))
|
protected = 1'b1;
|
protected = 1'b1;
|
else
|
else
|
protected = 1'b0;
|
protected = 1'b0;
|
end
|
end
|
else if (DEVICE == "AT25DF041A") // un-uniform sectors of AT25DF041A
|
else if (DEVICE == "AT25DF041A") // un-uniform sectors of AT25DF041A
|
begin
|
begin
|
if((check_address[23:14]==10'b00000111_11 && sector_reg[10]==1'b1)
|
if((check_address[23:14]==10'b00000111_11 && sector_reg[10]==1'b1)
|
|| (check_address[23:13]==11'b00000111_101 && sector_reg[9]==1'b1)
|
|| (check_address[23:13]==11'b00000111_101 && sector_reg[9]==1'b1)
|
|| (check_address[23:13]==11'b00000111_100 && sector_reg[8]==1'b1)
|
|| (check_address[23:13]==11'b00000111_100 && sector_reg[8]==1'b1)
|
|| (check_address[23:15]==9'b00000111_0 && sector_reg[7] ==1'b1)
|
|| (check_address[23:15]==9'b00000111_0 && sector_reg[7] ==1'b1)
|
|| (check_address[23:16]==8'b00000110 && sector_reg[6]==1'b1)
|
|| (check_address[23:16]==8'b00000110 && sector_reg[6]==1'b1)
|
|| (check_address[23:16]==8'b00000101 && sector_reg[5]==1'b1)
|
|| (check_address[23:16]==8'b00000101 && sector_reg[5]==1'b1)
|
|| (check_address[23:16]==8'b00000100 && sector_reg[4]==1'b1)
|
|| (check_address[23:16]==8'b00000100 && sector_reg[4]==1'b1)
|
|| (check_address[23:16]==8'b00000011 && sector_reg[3]==1'b1)
|
|| (check_address[23:16]==8'b00000011 && sector_reg[3]==1'b1)
|
|| (check_address[23:16]==8'b00000010 && sector_reg[2]==1'b1)
|
|| (check_address[23:16]==8'b00000010 && sector_reg[2]==1'b1)
|
|| (check_address[23:16]==8'b00000001 && sector_reg[1]==1'b1)
|
|| (check_address[23:16]==8'b00000001 && sector_reg[1]==1'b1)
|
|| (check_address[23:16]==8'b00000000 && sector_reg[0]==1'b1))
|
|| (check_address[23:16]==8'b00000000 && sector_reg[0]==1'b1))
|
protected = 1'b1;
|
protected = 1'b1;
|
else
|
else
|
protected = 1'b0;
|
protected = 1'b0;
|
end
|
end
|
else
|
else
|
$display("Check Sector Protection failed");
|
$display("Check Sector Protection failed");
|
end
|
end
|
endtask
|
endtask
|
|
|
// Sending Sector Protection status
|
// Sending Sector Protection status
|
task send_protection_status;
|
task send_protection_status;
|
integer local_i;
|
integer local_i;
|
reg [7:0] send_status; // status value, 'ff' if protected, '00' if unprotected
|
reg [7:0] send_status; // status value, 'ff' if protected, '00' if unprotected
|
begin
|
begin
|
if(protected==1'b1)
|
if(protected==1'b1)
|
send_status = 8'hff;
|
send_status = 8'hff;
|
else
|
else
|
send_status = 8'h00;
|
send_status = 8'h00;
|
local_i = 7;
|
local_i = 7;
|
|
|
while (CSB == 1'b0) // continue transmitting, while, CSB is Low
|
while (CSB == 1'b0) // continue transmitting, while, CSB is Low
|
begin
|
begin
|
@(negedge SCK);
|
@(negedge SCK);
|
SO_reg = 1'bx;
|
SO_reg = 1'bx;
|
if(HOLDB==1'b0)
|
if(HOLDB==1'b0)
|
begin
|
begin
|
#tHLQZ SO_on = 1'b0;
|
#tHLQZ SO_on = 1'b0;
|
wait (HOLDB);
|
wait (HOLDB);
|
#tHHQX;
|
#tHHQX;
|
end
|
end
|
#tV;
|
#tV;
|
SO_reg = send_status[local_i];
|
SO_reg = send_status[local_i];
|
SO_on = 1'b1;
|
SO_on = 1'b1;
|
if (local_i == 0)
|
if (local_i == 0)
|
local_i = 7;
|
local_i = 7;
|
else
|
else
|
local_i = local_i - 1; // next bit
|
local_i = local_i - 1; // next bit
|
end // sending status over, because CSB has gone high
|
end // sending status over, because CSB has gone high
|
end
|
end
|
endtask
|
endtask
|
|
|
// receive data for byte/page programming
|
// receive data for byte/page programming
|
task page_program;
|
task page_program;
|
begin
|
begin
|
pp_j = 0;
|
pp_j = 0;
|
while(CSB==1'b0)
|
while(CSB==1'b0)
|
begin
|
begin
|
for (pp_i=8; pp_i>0; pp_i = pp_i-1)
|
for (pp_i=8; pp_i>0; pp_i = pp_i-1)
|
begin
|
begin
|
@(posedge SCK);
|
@(posedge SCK);
|
read_data[pp_i-1] = SI;
|
read_data[pp_i-1] = SI;
|
if(HOLDB==1'b0)
|
if(HOLDB==1'b0)
|
wait (HOLDB);
|
wait (HOLDB);
|
end
|
end
|
int_buffer[pp_j] = read_data;
|
int_buffer[pp_j] = read_data;
|
pp_j = pp_j+1;
|
pp_j = pp_j+1;
|
$display("One byte of data: %h received for Page Program",read_data);
|
$display("One byte of data: %h received for Page Program",read_data);
|
end
|
end
|
end
|
end
|
endtask
|
endtask
|
|
|
// Byte program for devices. also used for page program
|
// Byte program for devices. also used for page program
|
task byte_program;
|
task byte_program;
|
input [23:0] write_address;
|
input [23:0] write_address;
|
input [7:0] write_data;
|
input [7:0] write_data;
|
begin
|
begin
|
memory [write_address] = write_data;
|
memory [write_address] = write_data;
|
$display ("One Byte of data %h written in memory in location %h", write_data, write_address);
|
$display ("One Byte of data %h written in memory in location %h", write_data, write_address);
|
end
|
end
|
endtask
|
endtask
|
|
|
// Erase a 4kB block
|
// Erase a 4kB block
|
task erase_4kb;
|
task erase_4kb;
|
input [23:0] erase_address;
|
input [23:0] erase_address;
|
|
|
reg [11:0] erase4_i;
|
reg [11:0] erase4_i;
|
reg [23:0] block_addr4;
|
reg [23:0] block_addr4;
|
|
|
begin
|
begin
|
block_addr4 = {erase_address[23:12],12'b0000_0000_0000};
|
block_addr4 = {erase_address[23:12],12'b0000_0000_0000};
|
$display ("4kB Block with start address %h is going to be erased", block_addr4);
|
$display ("4kB Block with start address %h is going to be erased", block_addr4);
|
|
|
for(erase4_i=12'b0; erase4_i < 12'b1111_1111_1111; erase4_i=erase4_i+1)
|
for(erase4_i=12'b0; erase4_i < 12'b1111_1111_1111; erase4_i=erase4_i+1)
|
begin
|
begin
|
memory [block_addr4 + erase4_i] = 8'hff;
|
memory [block_addr4 + erase4_i] = 8'hff;
|
end
|
end
|
end
|
end
|
endtask
|
endtask
|
|
|
// Erase a 32kB block
|
// Erase a 32kB block
|
task erase_32kb;
|
task erase_32kb;
|
input [23:0] erase_address;
|
input [23:0] erase_address;
|
|
|
reg [14:0] erase32_i;
|
reg [14:0] erase32_i;
|
reg [23:0] block_addr32;
|
reg [23:0] block_addr32;
|
|
|
begin
|
begin
|
block_addr32 = {erase_address[23:15],15'b0000_0000_0000_000};
|
block_addr32 = {erase_address[23:15],15'b0000_0000_0000_000};
|
$display ("32kB Block with start address %h is going to be erased", block_addr32);
|
$display ("32kB Block with start address %h is going to be erased", block_addr32);
|
|
|
for(erase32_i=15'b0; erase32_i < 15'b1111_1111_1111_111; erase32_i=erase32_i+1)
|
for(erase32_i=15'b0; erase32_i < 15'b1111_1111_1111_111; erase32_i=erase32_i+1)
|
begin
|
begin
|
memory [block_addr32 + erase32_i] = 8'hff;
|
memory [block_addr32 + erase32_i] = 8'hff;
|
end
|
end
|
end
|
end
|
endtask
|
endtask
|
|
|
// Erase a 64kB block
|
// Erase a 64kB block
|
task erase_64kb;
|
task erase_64kb;
|
input [23:0] erase_address;
|
input [23:0] erase_address;
|
|
|
reg [15:0] erase64_i;
|
reg [15:0] erase64_i;
|
reg [23:0] block_addr64;
|
reg [23:0] block_addr64;
|
|
|
begin
|
begin
|
block_addr64 = {erase_address[23:16],16'b0000_0000_0000_0000};
|
block_addr64 = {erase_address[23:16],16'b0000_0000_0000_0000};
|
$display ("64kB Block with start address %h is going to be erased", block_addr64);
|
$display ("64kB Block with start address %h is going to be erased", block_addr64);
|
|
|
for(erase64_i=0; erase64_i < 16'b1111_1111_1111_1111; erase64_i=erase64_i+1)
|
for(erase64_i=0; erase64_i < 16'b1111_1111_1111_1111; erase64_i=erase64_i+1)
|
begin
|
begin
|
memory [block_addr64 + erase64_i] = 8'hff;
|
memory [block_addr64 + erase64_i] = 8'hff;
|
end
|
end
|
end
|
end
|
endtask
|
endtask
|
|
|
// Chip Erase
|
// Chip Erase
|
task erase_chip;
|
task erase_chip;
|
|
|
reg [23:0] erase_i;
|
reg [23:0] erase_i;
|
|
|
begin
|
begin
|
$display ("Chip Erase is going to be started");
|
$display ("Chip Erase is going to be started");
|
for(erase_i=0; erase_i < (MEMSIZE-1); erase_i=erase_i+1)
|
for(erase_i=0; erase_i < (MEMSIZE-1); erase_i=erase_i+1)
|
begin
|
begin
|
memory [erase_i] = 8'hff;
|
memory [erase_i] = 8'hff;
|
end
|
end
|
end
|
end
|
endtask
|
endtask
|
|
|
// ******************* Execution of Opcodes ********************* //
|
// ******************* Execution of Opcodes ********************* //
|
|
|
// ************* Deep Power-down ***************** //
|
// ************* Deep Power-down ***************** //
|
always @(EDPD)
|
always @(EDPD)
|
begin : EDPD_
|
begin : EDPD_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device is busy. Deep Power-down command cannot be issued");
|
$display ("Device is busy. Deep Power-down command cannot be issued");
|
disable EDPD_ ;
|
disable EDPD_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
//if (freq_error==1'b1)
|
//if (freq_error==1'b1)
|
//$display("WARNING: Frequency should be less than %d Mhz for SPI interface. Deep Power-down is not allowed.",fSCK);
|
//$display("WARNING: Frequency should be less than %d Mhz for SPI interface. Deep Power-down is not allowed.",fSCK);
|
|
|
@ (posedge CSB);
|
@ (posedge CSB);
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
#tEDPD deep_power_down = 1'b1;
|
#tEDPD deep_power_down = 1'b1;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
$display ("Device %s enters into Deep Power-down mode. Send 'Resume from Deep Power-down' to resume", DEVICE);
|
$display ("Device %s enters into Deep Power-down mode. Send 'Resume from Deep Power-down' to resume", DEVICE);
|
end
|
end
|
|
|
// ************* Resume from Deep Power-down ***************** //
|
// ************* Resume from Deep Power-down ***************** //
|
always @(RDPD)
|
always @(RDPD)
|
begin : RDPD_
|
begin : RDPD_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device is busy. Deep Power-down command cannot be issued");
|
$display ("Device is busy. Deep Power-down command cannot be issued");
|
disable EDPD_ ;
|
disable EDPD_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
//if (freq_error==1'b1)
|
//if (freq_error==1'b1)
|
//$display("WARNING: Frequency should be less than %d Mhz for SPI interface. Resume from Deep Power-down is not allowed.",fSCK);
|
//$display("WARNING: Frequency should be less than %d Mhz for SPI interface. Resume from Deep Power-down is not allowed.",fSCK);
|
|
|
@ (posedge CSB);
|
@ (posedge CSB);
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
#tRDPD deep_power_down = 1'b0;
|
#tRDPD deep_power_down = 1'b0;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
$display ("Device %s Resumes from Deep Power-down mode", DEVICE);
|
$display ("Device %s Resumes from Deep Power-down mode", DEVICE);
|
end
|
end
|
|
|
// ************* Manufacturing ID Read ******************** //
|
// ************* Manufacturing ID Read ******************** //
|
always @(MIR)
|
always @(MIR)
|
begin: MIR_
|
begin: MIR_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device is busy. Manufacturing ID Read cannot be issued");
|
$display ("Device is busy. Manufacturing ID Read cannot be issued");
|
disable EDPD_ ;
|
disable EDPD_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
//if (freq_error==1'b1)
|
//if (freq_error==1'b1)
|
//$display("WARNING: Frequency should be less than %d Mhz for SPI interface. Manufacturing ID Read is not allowed.",fSCK);
|
//$display("WARNING: Frequency should be less than %d Mhz for SPI interface. Manufacturing ID Read is not allowed.",fSCK);
|
|
|
j = 32;
|
j = 32;
|
while (CSB == 1'b0)
|
while (CSB == 1'b0)
|
begin
|
begin
|
@(negedge SCK);
|
@(negedge SCK);
|
SO_reg = 1'bx;
|
SO_reg = 1'bx;
|
if(HOLDB==1'b0)
|
if(HOLDB==1'b0)
|
begin
|
begin
|
#tHLQZ SO_on = 1'b0;
|
#tHLQZ SO_on = 1'b0;
|
wait (HOLDB);
|
wait (HOLDB);
|
#tHHQX;
|
#tHHQX;
|
end
|
end
|
#tV;
|
#tV;
|
if (j > 0)
|
if (j > 0)
|
begin
|
begin
|
SO_reg = MAN_ID[j-1];
|
SO_reg = MAN_ID[j-1];
|
j = j-1;
|
j = j-1;
|
SO_on = 1'b1;
|
SO_on = 1'b1;
|
if(j == 0)
|
if(j == 0)
|
begin
|
begin
|
$display ("Manufacture ID and Device ID of Device %s sent", DEVICE);
|
$display ("Manufacture ID and Device ID of Device %s sent", DEVICE);
|
j = 32;
|
j = 32;
|
end
|
end
|
end
|
end
|
end // output next bit on next falling edge of SCK
|
end // output next bit on next falling edge of SCK
|
$display ("Manufacture ID and Device ID of Device %s sent", DEVICE);
|
$display ("Manufacture ID and Device ID of Device %s sent", DEVICE);
|
end
|
end
|
|
|
// ************ Read Status Register ******************** //
|
// ************ Read Status Register ******************** //
|
always @(RSR)
|
always @(RSR)
|
begin: RSR_
|
begin: RSR_
|
//if (freq_error==1'b1)
|
//if (freq_error==1'b1)
|
//$display("WARNING: Frequency should be less than %d Mhz for SPI interface. Status Register Read is not allowed.",fSCK);
|
//$display("WARNING: Frequency should be less than %d Mhz for SPI interface. Status Register Read is not allowed.",fSCK);
|
|
|
status_read = 1'b1; // reading status_reg
|
status_read = 1'b1; // reading status_reg
|
j = 8;
|
j = 8;
|
while (CSB == 1'b0)
|
while (CSB == 1'b0)
|
begin
|
begin
|
@(negedge SCK);
|
@(negedge SCK);
|
SO_reg = 1'bx;
|
SO_reg = 1'bx;
|
if(HOLDB==1'b0)
|
if(HOLDB==1'b0)
|
begin
|
begin
|
#tHLQZ SO_on = 1'b0;
|
#tHLQZ SO_on = 1'b0;
|
wait (HOLDB);
|
wait (HOLDB);
|
#tHHQX;
|
#tHHQX;
|
end
|
end
|
#tV;
|
#tV;
|
if (j > 0)
|
if (j > 0)
|
begin
|
begin
|
SO_on = 1'b1;
|
SO_on = 1'b1;
|
SO_reg = status_reg[j-1];
|
SO_reg = status_reg[j-1];
|
j = j-1;
|
j = j-1;
|
if (j == 0)
|
if (j == 0)
|
begin
|
begin
|
j = 8;
|
j = 8;
|
$display ("Status register content of Device %s transmitted", DEVICE);
|
$display ("Status register content of Device %s transmitted", DEVICE);
|
end
|
end
|
end
|
end
|
end // output next bit on next falling edge of SCK
|
end // output next bit on next falling edge of SCK
|
status_read = 1'b0; // status_reg read is over
|
status_read = 1'b0; // status_reg read is over
|
end
|
end
|
|
|
// ************ Write Status Register ******************** //
|
// ************ Write Status Register ******************** //
|
always @(WSR)
|
always @(WSR)
|
begin : WSR_
|
begin : WSR_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. Write Status Register is not allowed", DEVICE);
|
$display ("Device %s is busy. Write Status Register is not allowed", DEVICE);
|
disable WSR_;
|
disable WSR_;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display("WARNING: Frequency should be less than %d Mhz for SPI interface. Write Status Register is not allowed.",fSCK);
|
$display("WARNING: Frequency should be less than %d Mhz for SPI interface. Write Status Register is not allowed.",fSCK);
|
|
|
get_data;
|
get_data;
|
SPRL_val = read_data [7];
|
SPRL_val = read_data [7];
|
stat_reg_temp = read_data [5:2];
|
stat_reg_temp = read_data [5:2];
|
|
|
@ (posedge CSB);
|
@ (posedge CSB);
|
if(WEL==1'b1)
|
if(WEL==1'b1)
|
begin
|
begin
|
if(WPB==1'b0 && SPRL==1'b0 && SPRL_val==1'b1)
|
if(WPB==1'b0 && SPRL==1'b0 && SPRL_val==1'b1)
|
$display("SPRL Hardware locked");
|
$display("SPRL Hardware locked");
|
else if(WPB==1'b1 && SPRL==1'b0 && SPRL_val==1'b1)
|
else if(WPB==1'b1 && SPRL==1'b0 && SPRL_val==1'b1)
|
$display("SPRL Software locked");
|
$display("SPRL Software locked");
|
else if(WPB==1'b0 && SPRL==1'b1 && SPRL_val==1'b1)
|
else if(WPB==1'b0 && SPRL==1'b1 && SPRL_val==1'b1)
|
$display("SPRL Hardware locked. Lock cannot be done");
|
$display("SPRL Hardware locked. Lock cannot be done");
|
else if(WPB==1'b1 && SPRL==1'b1 && SPRL_val==1'b1)
|
else if(WPB==1'b1 && SPRL==1'b1 && SPRL_val==1'b1)
|
$display("SPRL Software locked. Lock cannot be done");
|
$display("SPRL Software locked. Lock cannot be done");
|
else if(WPB==1'b0 && SPRL==1'b1 && SPRL_val==1'b0)
|
else if(WPB==1'b0 && SPRL==1'b1 && SPRL_val==1'b0)
|
$display("SPRL Hardware locked. Unlock cannot be done");
|
$display("SPRL Hardware locked. Unlock cannot be done");
|
else if(WPB==1'b1 && SPRL==1'b1 && SPRL_val==1'b0)
|
else if(WPB==1'b1 && SPRL==1'b1 && SPRL_val==1'b0)
|
$display("Sector Protection Register UnLocked");
|
$display("Sector Protection Register UnLocked");
|
else
|
else
|
$display("SPRL in unlocked state");
|
$display("SPRL in unlocked state");
|
|
|
if(stat_reg_temp==4'b1111 && SPRL==1'b0)
|
if(stat_reg_temp==4'b1111 && SPRL==1'b0)
|
global_protect = 1'b1;
|
global_protect = 1'b1;
|
else if(stat_reg_temp==4'b0000 && SPRL==1'b0)
|
else if(stat_reg_temp==4'b0000 && SPRL==1'b0)
|
global_unprotect = 1'b1;
|
global_unprotect = 1'b1;
|
else if(SPRL==1'b1 && (stat_reg_temp==4'b0000 || stat_reg_temp==4'b1111))
|
else if(SPRL==1'b1 && (stat_reg_temp==4'b0000 || stat_reg_temp==4'b1111))
|
begin
|
begin
|
$display("SPRL locked. Global Protect/Unprotect cannot be done");
|
$display("SPRL locked. Global Protect/Unprotect cannot be done");
|
global_protect = 1'b0;
|
global_protect = 1'b0;
|
global_unprotect = 1'b0;
|
global_unprotect = 1'b0;
|
end
|
end
|
|
|
if(SPRL==1'b0 && global_protect==1'b1)
|
if(SPRL==1'b0 && global_protect==1'b1)
|
$display("Global Protection issued for Sector protection register");
|
$display("Global Protection issued for Sector protection register");
|
else if(SPRL==1'b0 && global_unprotect==1'b1)
|
else if(SPRL==1'b0 && global_unprotect==1'b1)
|
$display("Global Unprotect issued for Sector protection register");
|
$display("Global Unprotect issued for Sector protection register");
|
else if(SPRL==1'b1 && (global_protect==1'b1 || global_unprotect==1'b1))
|
else if(SPRL==1'b1 && (global_protect==1'b1 || global_unprotect==1'b1))
|
$display("SPRL locked. Global Protect/Unprotect cannot be done");
|
$display("SPRL locked. Global Protect/Unprotect cannot be done");
|
|
|
if(SPRL==1'b0 && SPRL_val==1'b1)
|
if(SPRL==1'b0 && SPRL_val==1'b1)
|
begin
|
begin
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
lock = 1'b1;
|
lock = 1'b1;
|
#tWRSR;
|
#tWRSR;
|
end
|
end
|
else if(SPRL==1'b1 && SPRL_val==1'b0)
|
else if(SPRL==1'b1 && SPRL_val==1'b0)
|
begin
|
begin
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
unlock = 1'b1;
|
unlock = 1'b1;
|
#tWRSR;
|
#tWRSR;
|
end
|
end
|
else if(global_protect==1'b1 || global_unprotect==1'b1)
|
else if(global_protect==1'b1 || global_unprotect==1'b1)
|
begin
|
begin
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
#tWRSR;
|
#tWRSR;
|
end
|
end
|
end
|
end
|
else
|
else
|
$display ("WEL bit not set. Write Status Register is not allowed");
|
$display ("WEL bit not set. Write Status Register is not allowed");
|
|
|
lock = 1'b0;
|
lock = 1'b0;
|
unlock = 1'b0;
|
unlock = 1'b0;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
global_protect = 1'b0;
|
global_protect = 1'b0;
|
global_unprotect = 1'b0;
|
global_unprotect = 1'b0;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
$display ("Write Status Register operation completed");
|
$display ("Write Status Register operation completed");
|
end
|
end
|
|
|
// ************ Write Enable ******************** //
|
// ************ Write Enable ******************** //
|
always @(WE)
|
always @(WE)
|
begin : WE_
|
begin : WE_
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display("WARNING: Frequency should be less than %d MHz for SPI interface. Write Enable is not allowed.",fSCK);
|
$display("WARNING: Frequency should be less than %d MHz for SPI interface. Write Enable is not allowed.",fSCK);
|
|
|
@ (posedge CSB);
|
@ (posedge CSB);
|
WEL = 1'b1;
|
WEL = 1'b1;
|
$display ("Write Enable Latch Set");
|
$display ("Write Enable Latch Set");
|
end
|
end
|
|
|
// ************ Write Disable ******************** //
|
// ************ Write Disable ******************** //
|
always @(WD)
|
always @(WD)
|
begin : WD_
|
begin : WD_
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display("WARNING: Frequency should be less than %d MHz for SPI interface. Write Disable is not allowed.",fSCK);
|
$display("WARNING: Frequency should be less than %d MHz for SPI interface. Write Disable is not allowed.",fSCK);
|
|
|
@ (posedge CSB);
|
@ (posedge CSB);
|
WEL = 1'b0;
|
WEL = 1'b0;
|
seq_byte_start = 1'b0;
|
seq_byte_start = 1'b0;
|
SPM = 1'b0;
|
SPM = 1'b0;
|
$display ("Write Enable Latch Reset");
|
$display ("Write Enable Latch Reset");
|
end
|
end
|
|
|
// ******************** Read Array ********************** //
|
// ******************** Read Array ********************** //
|
always @(RA)
|
always @(RA)
|
begin : RA_
|
begin : RA_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. Read Array is not allowed", DEVICE);
|
$display ("Device %s is busy. Read Array is not allowed", DEVICE);
|
disable RA_;
|
disable RA_;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Read Array is not allowed",fSCK);
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Read Array is not allowed",fSCK);
|
|
|
get_data;
|
get_data;
|
temp_addr [23:16] = read_data [7:0];
|
temp_addr [23:16] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [15:8] = read_data [7:0];
|
temp_addr [15:8] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [7:0] = read_data [7:0];
|
temp_addr [7:0] = read_data [7:0];
|
current_address = temp_addr;
|
current_address = temp_addr;
|
|
|
if(rd_dummy==1'b1 && CSB==1'b0) // for SCK freq, receive 8 dummy bits
|
if(rd_dummy==1'b1 && CSB==1'b0) // for SCK freq, receive 8 dummy bits
|
begin
|
begin
|
for (dummy = 7; dummy >= 0; dummy = dummy - 1) // these are dont-care, so discarded
|
for (dummy = 7; dummy >= 0; dummy = dummy - 1) // these are dont-care, so discarded
|
begin
|
begin
|
@(posedge SCK);
|
@(posedge SCK);
|
read_dummy[dummy] = SI;
|
read_dummy[dummy] = SI;
|
if(HOLDB==1'b0)
|
if(HOLDB==1'b0)
|
wait (HOLDB);
|
wait (HOLDB);
|
end
|
end
|
read_dummy = 8'b0;
|
read_dummy = 8'b0;
|
end
|
end
|
|
|
read_out_array(current_address); // read continuously from memory untill CSB deasserted
|
read_out_array(current_address); // read continuously from memory untill CSB deasserted
|
current_address = 24'b0;
|
current_address = 24'b0;
|
end
|
end
|
|
|
// ****************** Protect Sector ****************** //
|
// ****************** Protect Sector ****************** //
|
always @(PS)
|
always @(PS)
|
begin : PS_
|
begin : PS_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. Protect Sector is not allowed", DEVICE);
|
$display ("Device %s is busy. Protect Sector is not allowed", DEVICE);
|
disable PS_ ;
|
disable PS_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Protect Sector is not allowed",fSCK);
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Protect Sector is not allowed",fSCK);
|
|
|
get_data;
|
get_data;
|
temp_addr [23:16] = read_data [7:0];
|
temp_addr [23:16] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [15:8] = read_data [7:0];
|
temp_addr [15:8] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [7:0] = read_data [7:0];
|
temp_addr [7:0] = read_data [7:0];
|
current_address = temp_addr;
|
current_address = temp_addr;
|
|
|
@ (posedge CSB);
|
@ (posedge CSB);
|
if(WEL==1'b1 && SPRL==1'b0)
|
if(WEL==1'b1 && SPRL==1'b0)
|
begin
|
begin
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
protect = 1'b1;
|
protect = 1'b1;
|
protect_sector(current_address);
|
protect_sector(current_address);
|
#tSECP;
|
#tSECP;
|
$display ("Sector for Address %h is Protected", current_address);
|
$display ("Sector for Address %h is Protected", current_address);
|
end
|
end
|
else
|
else
|
$display ("WEL bit not set or Sector Protection Register Locked. Protect Sector is not allowed");
|
$display ("WEL bit not set or Sector Protection Register Locked. Protect Sector is not allowed");
|
WEL = 1'b0;
|
WEL = 1'b0;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
protect = 1'b0;
|
protect = 1'b0;
|
current_address = 24'b0;
|
current_address = 24'b0;
|
end
|
end
|
|
|
// ****************** Un-Protect Sector ****************** //
|
// ****************** Un-Protect Sector ****************** //
|
always @(UPS)
|
always @(UPS)
|
begin : UPS_
|
begin : UPS_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. Un-Protect Sector is not allowed", DEVICE);
|
$display ("Device %s is busy. Un-Protect Sector is not allowed", DEVICE);
|
disable UPS_ ;
|
disable UPS_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Un-Protect Sector is not allowed",fSCK);
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Un-Protect Sector is not allowed",fSCK);
|
|
|
get_data;
|
get_data;
|
temp_addr [23:16] = read_data [7:0];
|
temp_addr [23:16] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [15:8] = read_data [7:0];
|
temp_addr [15:8] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [7:0] = read_data [7:0];
|
temp_addr [7:0] = read_data [7:0];
|
current_address = temp_addr;
|
current_address = temp_addr;
|
|
|
@ (posedge CSB);
|
@ (posedge CSB);
|
if(WEL==1'b1 && SPRL==1'b0)
|
if(WEL==1'b1 && SPRL==1'b0)
|
begin
|
begin
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
unprotect = 1'b1;
|
unprotect = 1'b1;
|
unprotect_sector(current_address);
|
unprotect_sector(current_address);
|
#tSECUP;
|
#tSECUP;
|
$display ("Sector for Address %h is UnProtected", current_address);
|
$display ("Sector for Address %h is UnProtected", current_address);
|
end
|
end
|
else
|
else
|
$display ("WEL bit not set or Sector Protection Register Locked. Un-Protect Sector is not allowed");
|
$display ("WEL bit not set or Sector Protection Register Locked. Un-Protect Sector is not allowed");
|
|
|
unprotect = 1'b0;
|
unprotect = 1'b0;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
current_address = 24'b0;
|
current_address = 24'b0;
|
end
|
end
|
|
|
// ****************** Read Sector Protection Register ****************** //
|
// ****************** Read Sector Protection Register ****************** //
|
always @(RSPR)
|
always @(RSPR)
|
begin : RSPR_
|
begin : RSPR_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. Read Sector Protection Register is not allowed", DEVICE);
|
$display ("Device %s is busy. Read Sector Protection Register is not allowed", DEVICE);
|
disable RSPR_ ;
|
disable RSPR_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Read Sector Protection Register is not allowed",fSCK);
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Read Sector Protection Register is not allowed",fSCK);
|
|
|
get_data;
|
get_data;
|
temp_addr [23:16] = read_data [7:0];
|
temp_addr [23:16] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [15:8] = read_data [7:0];
|
temp_addr [15:8] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [7:0] = read_data [7:0];
|
temp_addr [7:0] = read_data [7:0];
|
current_address = temp_addr;
|
current_address = temp_addr;
|
|
|
check_protection(current_address);
|
check_protection(current_address);
|
if(protected==1'b1)
|
if(protected==1'b1)
|
$display ("Sector for Address %h is Protected", current_address);
|
$display ("Sector for Address %h is Protected", current_address);
|
else
|
else
|
$display ("Sector for Address %h is UnProtected", current_address);
|
$display ("Sector for Address %h is UnProtected", current_address);
|
|
|
send_protection_status; // sending the Sector Protection Register content in SO
|
send_protection_status; // sending the Sector Protection Register content in SO
|
current_address = 24'b0;
|
current_address = 24'b0;
|
$display ("Read Sector Protection Register completed");
|
$display ("Read Sector Protection Register completed");
|
end
|
end
|
|
|
// ********************* Byte Program ********************* //
|
// ********************* Byte Program ********************* //
|
always @(BP)
|
always @(BP)
|
begin : BP_
|
begin : BP_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. Byte Program is not allowed", DEVICE);
|
$display ("Device %s is busy. Byte Program is not allowed", DEVICE);
|
disable BP_ ;
|
disable BP_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Byte Program is not allowed",fSCK);
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Byte Program is not allowed",fSCK);
|
|
|
// to receive 3 bytes of address
|
// to receive 3 bytes of address
|
get_data;
|
get_data;
|
temp_addr [23:16] = read_data [7:0];
|
temp_addr [23:16] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [15:8] = read_data [7:0];
|
temp_addr [15:8] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [7:0] = read_data [7:0];
|
temp_addr [7:0] = read_data [7:0];
|
current_address = temp_addr;
|
current_address = temp_addr;
|
|
|
/*
|
/*
|
// to receive 1 bytes of data
|
// to receive 1 bytes of data
|
get_data;
|
get_data;
|
data_in [7:0] = read_data [7:0];
|
data_in [7:0] = read_data [7:0];
|
*/
|
*/
|
page_program; // page program - receives data
|
page_program; // page program - receives data
|
|
|
if(pp_i < 8) // page program should not proceed if CSB deasserted at intermediate points
|
if(pp_i < 8) // page program should not proceed if CSB deasserted at intermediate points
|
begin
|
begin
|
$display ("Chip Select deasserted in non-even point. Byte/Page Program is not allowed");
|
$display ("Chip Select deasserted in non-even point. Byte/Page Program is not allowed");
|
WEL = 1'b0;
|
WEL = 1'b0;
|
EPE = 1'b1;
|
EPE = 1'b1;
|
disable BP_ ;
|
disable BP_ ;
|
end
|
end
|
|
|
if(WEL==1'b0)
|
if(WEL==1'b0)
|
begin
|
begin
|
$display ("WEL bit not set. Byte Program is not allowed");
|
$display ("WEL bit not set. Byte Program is not allowed");
|
disable BP_ ;
|
disable BP_ ;
|
end
|
end
|
|
|
check_protection(current_address);
|
check_protection(current_address);
|
|
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. Byte Program cannot be performed", current_address);
|
$display("Sector for Address %h is Protected. Byte Program cannot be performed", current_address);
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BP_ ;
|
disable BP_ ;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
$display ("Sector for Address %h is UnProtected, Byte Program can be performed", current_address);
|
$display ("Sector for Address %h is UnProtected, Byte Program can be performed", current_address);
|
// @ (posedge CSB);
|
// @ (posedge CSB);
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
byte_prog = 1'b1;
|
byte_prog = 1'b1;
|
pp_address = current_address[7:0];
|
pp_address = current_address[7:0];
|
|
|
for(pp = 0; pp < pp_j; pp = pp+1)
|
for(pp = 0; pp < pp_j; pp = pp+1)
|
begin
|
begin
|
data_in = int_buffer[pp];
|
data_in = int_buffer[pp];
|
byte_program({current_address[23:8],pp_address}, data_in);
|
byte_program({current_address[23:8],pp_address}, data_in);
|
pp_address = pp_address + 1'b1;
|
pp_address = pp_address + 1'b1;
|
end
|
end
|
$display("Byte write completed");
|
$display("Byte write completed");
|
|
|
#tPP;
|
#tPP;
|
pp = 0;
|
pp = 0;
|
pp_j = 0;
|
pp_j = 0;
|
pp_i = 0;
|
pp_i = 0;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
byte_prog = 1'b0;
|
byte_prog = 1'b0;
|
current_address = 24'b0;
|
current_address = 24'b0;
|
pp_address = 8'b0;
|
pp_address = 8'b0;
|
data_in = 8'b0;
|
data_in = 8'b0;
|
end
|
end
|
end
|
end
|
|
|
// ********************* Sequential Byte Program ********************* //
|
// ********************* Sequential Byte Program ********************* //
|
always @(SBP)
|
always @(SBP)
|
begin : SBP_
|
begin : SBP_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. Sequential Byte Program is not allowed", DEVICE);
|
$display ("Device %s is busy. Sequential Byte Program is not allowed", DEVICE);
|
disable SBP_ ;
|
disable SBP_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Sequential Byte Program is not allowed",fSCK);
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Sequential Byte Program is not allowed",fSCK);
|
|
|
if(seq_byte_start==1'b0)
|
if(seq_byte_start==1'b0)
|
begin
|
begin
|
// to receive 3 bytes of address
|
// to receive 3 bytes of address
|
get_data;
|
get_data;
|
temp_addr [23:16] = read_data [7:0];
|
temp_addr [23:16] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [15:8] = read_data [7:0];
|
temp_addr [15:8] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [7:0] = read_data [7:0];
|
temp_addr [7:0] = read_data [7:0];
|
current_address = temp_addr;
|
current_address = temp_addr;
|
end
|
end
|
|
|
SPM = 1'b1; // Entered Sequential Byte Programing mode
|
SPM = 1'b1; // Entered Sequential Byte Programing mode
|
|
|
if(seq_byte_start==1'b1) // to increment address when entering sequential mode
|
if(seq_byte_start==1'b1) // to increment address when entering sequential mode
|
begin
|
begin
|
if(current_address < (MEMSIZE-1))
|
if(current_address < (MEMSIZE-1))
|
current_address = current_address + 1'b1;
|
current_address = current_address + 1'b1;
|
else if(current_address == (MEMSIZE-1))
|
else if(current_address == (MEMSIZE-1))
|
begin
|
begin
|
$display ("Sequential Byte Program for device: %s reaches end of memory (%h). No Wrapping allowed. Sequential Byte Program is not allowed", DEVICE, MEMSIZE-1);
|
$display ("Sequential Byte Program for device: %s reaches end of memory (%h). No Wrapping allowed. Sequential Byte Program is not allowed", DEVICE, MEMSIZE-1);
|
WEL = 1'b0;
|
WEL = 1'b0;
|
SPM = 1'b0;
|
SPM = 1'b0;
|
seq_byte_start = 1'b0;
|
seq_byte_start = 1'b0;
|
disable SBP_ ;
|
disable SBP_ ;
|
end
|
end
|
end
|
end
|
|
|
// to receive 1 bytes of data
|
// to receive 1 bytes of data
|
get_data;
|
get_data;
|
data_in [7:0] = read_data [7:0];
|
data_in [7:0] = read_data [7:0];
|
|
|
if(WEL==1'b0)
|
if(WEL==1'b0)
|
begin
|
begin
|
$display ("WEL bit not set. Sequential Byte Program is not allowed");
|
$display ("WEL bit not set. Sequential Byte Program is not allowed");
|
seq_byte_start = 1'b0;
|
seq_byte_start = 1'b0;
|
SPM = 1'b0;
|
SPM = 1'b0;
|
disable SBP_ ;
|
disable SBP_ ;
|
end
|
end
|
|
|
check_protection(current_address);
|
check_protection(current_address);
|
|
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. Sequential Byte Program cannot be performed", current_address);
|
$display("Sector for Address %h is Protected. Sequential Byte Program cannot be performed", current_address);
|
seq_byte_start = 1'b0;
|
seq_byte_start = 1'b0;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
SPM = 1'b0;
|
SPM = 1'b0;
|
disable SBP_ ;
|
disable SBP_ ;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
$display ("Sector for Address %h is UnProtected, Sequential Byte Program can be performed", current_address);
|
$display ("Sector for Address %h is UnProtected, Sequential Byte Program can be performed", current_address);
|
@ (posedge CSB);
|
@ (posedge CSB);
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
seq_byte_prog = 1'b1;
|
seq_byte_prog = 1'b1;
|
|
|
byte_program(current_address, data_in);
|
byte_program(current_address, data_in);
|
$display("Sequential Byte write completed");
|
$display("Sequential Byte write completed");
|
|
|
#tBP;
|
#tBP;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
seq_byte_prog = 1'b0;
|
seq_byte_prog = 1'b0;
|
data_in = 8'b0;
|
data_in = 8'b0;
|
seq_byte_start = 1'b1;
|
seq_byte_start = 1'b1;
|
end
|
end
|
end
|
end
|
|
|
// ********************* 4kB Block Erase ********************* //
|
// ********************* 4kB Block Erase ********************* //
|
always @(BE4)
|
always @(BE4)
|
begin : BE4_
|
begin : BE4_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. 4KB Block Erase is not allowed", DEVICE);
|
$display ("Device %s is busy. 4KB Block Erase is not allowed", DEVICE);
|
disable BE4_ ;
|
disable BE4_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. 4KB Block Erase is not allowed",fSCK);
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. 4KB Block Erase is not allowed",fSCK);
|
|
|
get_data;
|
get_data;
|
temp_addr [23:16] = read_data [7:0];
|
temp_addr [23:16] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [15:8] = read_data [7:0];
|
temp_addr [15:8] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [7:0] = read_data [7:0];
|
temp_addr [7:0] = read_data [7:0];
|
current_address = temp_addr;
|
current_address = temp_addr;
|
|
|
if(WEL==1'b0)
|
if(WEL==1'b0)
|
begin
|
begin
|
$display ("WEL bit not set. 4KB Block Erase is not allowed");
|
$display ("WEL bit not set. 4KB Block Erase is not allowed");
|
disable BE4_ ;
|
disable BE4_ ;
|
end
|
end
|
|
|
check_protection(current_address);
|
check_protection(current_address);
|
|
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 4KB Block Erase cannot be performed", current_address);
|
$display("Sector for Address %h is Protected. 4KB Block Erase cannot be performed", current_address);
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE4_ ;
|
disable BE4_ ;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
$display ("Sector for Address %h is UnProtected, 4KB Block Erase can be performed", current_address);
|
$display ("Sector for Address %h is UnProtected, 4KB Block Erase can be performed", current_address);
|
@ (posedge CSB);
|
@ (posedge CSB);
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
erasing_block4 = 1'b1;
|
erasing_block4 = 1'b1;
|
|
|
erase_4kb(current_address);
|
erase_4kb(current_address);
|
#tBLKE4;
|
#tBLKE4;
|
|
|
$display ("4kB Block with start address %h erased", {current_address[23:12],12'b0});
|
$display ("4kB Block with start address %h erased", {current_address[23:12],12'b0});
|
WEL = 1'b0;
|
WEL = 1'b0;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
current_address = 24'b0;
|
current_address = 24'b0;
|
erasing_block4 = 1'b0;
|
erasing_block4 = 1'b0;
|
end
|
end
|
end
|
end
|
|
|
// ********************* 32kB Block Erase ********************* //
|
// ********************* 32kB Block Erase ********************* //
|
always @(BE32)
|
always @(BE32)
|
begin : BE32_
|
begin : BE32_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. 32KB Block Erase is not allowed", DEVICE);
|
$display ("Device %s is busy. 32KB Block Erase is not allowed", DEVICE);
|
disable BE32_ ;
|
disable BE32_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. 32KB Block Erase is not allowed",fSCK);
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. 32KB Block Erase is not allowed",fSCK);
|
|
|
get_data;
|
get_data;
|
temp_addr [23:16] = read_data [7:0];
|
temp_addr [23:16] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [15:8] = read_data [7:0];
|
temp_addr [15:8] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [7:0] = read_data [7:0];
|
temp_addr [7:0] = read_data [7:0];
|
current_address = temp_addr;
|
current_address = temp_addr;
|
|
|
if(WEL==1'b0)
|
if(WEL==1'b0)
|
begin
|
begin
|
$display ("WEL bit not set. 32KB Block Erase is not allowed");
|
$display ("WEL bit not set. 32KB Block Erase is not allowed");
|
disable BE32_ ;
|
disable BE32_ ;
|
end
|
end
|
|
|
if(DEVICE == "AT25DF041A" && current_address[23:15]==9'b0000_0111_1)
|
if(DEVICE == "AT25DF041A" && current_address[23:15]==9'b0000_0111_1)
|
begin
|
begin
|
check_protection({current_address[23:16],2'b11,14'b0});
|
check_protection({current_address[23:16],2'b11,14'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],2'b11,14'b0});
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],2'b11,14'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE32_ ;
|
disable BE32_ ;
|
end
|
end
|
check_protection({current_address[23:16],3'b100,13'b0});
|
check_protection({current_address[23:16],3'b100,13'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],3'b100,13'b0});
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],3'b100,13'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE32_ ;
|
disable BE32_ ;
|
end
|
end
|
check_protection({current_address[23:16],3'b101,13'b0});
|
check_protection({current_address[23:16],3'b101,13'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],3'b101,13'b0});
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],3'b101,13'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE32_ ;
|
disable BE32_ ;
|
end
|
end
|
end
|
end
|
else if(DEVICE == "AT26DF081A" && current_address[23:15]==9'b0000_1111_0)
|
else if(DEVICE == "AT26DF081A" && current_address[23:15]==9'b0000_1111_0)
|
begin
|
begin
|
check_protection({current_address[23:16],2'b00,15'b0});
|
check_protection({current_address[23:16],2'b00,15'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],2'b00,15'b0});
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],2'b00,15'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE32_ ;
|
disable BE32_ ;
|
end
|
end
|
check_protection({current_address[23:16],3'b010,13'b0});
|
check_protection({current_address[23:16],3'b010,13'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],3'b010,13'b0});
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],3'b010,13'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE32_ ;
|
disable BE32_ ;
|
end
|
end
|
check_protection({current_address[23:16],3'b011,13'b0});
|
check_protection({current_address[23:16],3'b011,13'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],3'b011,13'b0});
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", {current_address[23:16],3'b011,13'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE32_ ;
|
disable BE32_ ;
|
end
|
end
|
end
|
end
|
else
|
else
|
check_protection(current_address);
|
check_protection(current_address);
|
|
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", current_address);
|
$display("Sector for Address %h is Protected. 32KB Block Erase cannot be performed", current_address);
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE32_ ;
|
disable BE32_ ;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
$display ("Sector for Address %h is UnProtected, 32KB Block Erase can be performed", current_address);
|
$display ("Sector for Address %h is UnProtected, 32KB Block Erase can be performed", current_address);
|
@ (posedge CSB);
|
@ (posedge CSB);
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
erasing_block32 = 1'b1;
|
erasing_block32 = 1'b1;
|
|
|
erase_32kb(current_address);
|
erase_32kb(current_address);
|
#tBLKE32;
|
#tBLKE32;
|
|
|
$display ("32KB Block with start address %h erased", {current_address[23:15],15'b0});
|
$display ("32KB Block with start address %h erased", {current_address[23:15],15'b0});
|
WEL = 1'b0;
|
WEL = 1'b0;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
current_address = 24'b0;
|
current_address = 24'b0;
|
erasing_block32 = 1'b0;
|
erasing_block32 = 1'b0;
|
end
|
end
|
end
|
end
|
|
|
// ********************* 64kB Block Erase ********************* //
|
// ********************* 64kB Block Erase ********************* //
|
always @(BE64)
|
always @(BE64)
|
begin : BE64_
|
begin : BE64_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. 64KB Block Erase is not allowed", DEVICE);
|
$display ("Device %s is busy. 64KB Block Erase is not allowed", DEVICE);
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. 64KB Block Erase is not allowed",fSCK);
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. 64KB Block Erase is not allowed",fSCK);
|
|
|
get_data;
|
get_data;
|
temp_addr [23:16] = read_data [7:0];
|
temp_addr [23:16] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [15:8] = read_data [7:0];
|
temp_addr [15:8] = read_data [7:0];
|
get_data;
|
get_data;
|
temp_addr [7:0] = read_data [7:0];
|
temp_addr [7:0] = read_data [7:0];
|
current_address = temp_addr;
|
current_address = temp_addr;
|
|
|
if(WEL==1'b0)
|
if(WEL==1'b0)
|
begin
|
begin
|
$display ("WEL bit not set. 64KB Block Erase is not allowed");
|
$display ("WEL bit not set. 64KB Block Erase is not allowed");
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
|
|
if(DEVICE == "AT25DF041A" && current_address[23:16]==8'b0000_0111)
|
if(DEVICE == "AT25DF041A" && current_address[23:16]==8'b0000_0111)
|
begin
|
begin
|
check_protection({current_address[23:16],1'b0,15'b0});
|
check_protection({current_address[23:16],1'b0,15'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],1'b0,15'b0});
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],1'b0,15'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
check_protection({current_address[23:16],2'b11,14'b0});
|
check_protection({current_address[23:16],2'b11,14'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],2'b11,14'b0});
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],2'b11,14'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
check_protection({current_address[23:16],3'b100,13'b0});
|
check_protection({current_address[23:16],3'b100,13'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],3'b100,13'b0});
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],3'b100,13'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
check_protection({current_address[23:16],3'b101,13'b0});
|
check_protection({current_address[23:16],3'b101,13'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],3'b101,13'b0});
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],3'b101,13'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
end
|
end
|
else if(DEVICE == "AT26DF081A" && current_address[23:16]==8'b0000_1111)
|
else if(DEVICE == "AT26DF081A" && current_address[23:16]==8'b0000_1111)
|
begin
|
begin
|
check_protection({current_address[23:16],2'b00,15'b0});
|
check_protection({current_address[23:16],2'b00,15'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],2'b00,15'b0});
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],2'b00,15'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
check_protection({current_address[23:16],1'b1,14'b0});
|
check_protection({current_address[23:16],1'b1,14'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],1'b1,14'b0});
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],1'b1,14'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
check_protection({current_address[23:16],3'b010,13'b0});
|
check_protection({current_address[23:16],3'b010,13'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],3'b010,13'b0});
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],3'b010,13'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
check_protection({current_address[23:16],3'b011,13'b0});
|
check_protection({current_address[23:16],3'b011,13'b0});
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],3'b011,13'b0});
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", {current_address[23:16],3'b011,13'b0});
|
EPE = 1'b1;
|
EPE = 1'b1;
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
end
|
end
|
else
|
else
|
check_protection(current_address);
|
check_protection(current_address);
|
|
|
if(protected==1'b1)
|
if(protected==1'b1)
|
begin
|
begin
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", current_address);
|
$display("Sector for Address %h is Protected. 64KB Block Erase cannot be performed", current_address);
|
WEL = 1'b0;
|
WEL = 1'b0;
|
disable BE64_ ;
|
disable BE64_ ;
|
end
|
end
|
else
|
else
|
begin
|
begin
|
$display ("Sector for Address %h is UnProtected, 64KB Block Erase can be performed", current_address);
|
$display ("Sector for Address %h is UnProtected, 64KB Block Erase can be performed", current_address);
|
@ (posedge CSB);
|
@ (posedge CSB);
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
erasing_block64 = 1'b1;
|
erasing_block64 = 1'b1;
|
|
|
erase_64kb(current_address);
|
erase_64kb(current_address);
|
#tBLKE64;
|
#tBLKE64;
|
|
|
$display ("64kB Block with start address %h erased", {current_address[23:16],16'b0});
|
$display ("64kB Block with start address %h erased", {current_address[23:16],16'b0});
|
WEL = 1'b0;
|
WEL = 1'b0;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
current_address = 24'b0;
|
current_address = 24'b0;
|
erasing_block64 = 1'b0;
|
erasing_block64 = 1'b0;
|
end
|
end
|
end
|
end
|
|
|
// ********************* Chip Erase ********************* //
|
// ********************* Chip Erase ********************* //
|
always @(CE)
|
always @(CE)
|
begin : CE_
|
begin : CE_
|
if (RDYnBSY == 1'b1) // device is already busy
|
if (RDYnBSY == 1'b1) // device is already busy
|
begin
|
begin
|
$display ("Device %s is busy. Chip Erase is not allowed", DEVICE);
|
$display ("Device %s is busy. Chip Erase is not allowed", DEVICE);
|
disable CE_ ;
|
disable CE_ ;
|
end
|
end
|
// if it comes here, means, the above if was false.
|
// if it comes here, means, the above if was false.
|
|
|
if (freq_error==1'b1)
|
if (freq_error==1'b1)
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Chip Erase is not allowed",fSCK);
|
$display ("WARNING: Frequency should be less than %d MHz for SPI interface. Chip Erase is not allowed",fSCK);
|
|
|
if(WEL==1'b0)
|
if(WEL==1'b0)
|
begin
|
begin
|
$display ("WEL bit not set. Chip Erase is not allowed");
|
$display ("WEL bit not set. Chip Erase is not allowed");
|
disable CE_ ;
|
disable CE_ ;
|
end
|
end
|
|
|
if(SWP==2'b00)
|
if(SWP==2'b00)
|
begin
|
begin
|
$display("All Sectors in the chip are UnProtected. Chip Erase can be performed");
|
$display("All Sectors in the chip are UnProtected. Chip Erase can be performed");
|
@ (posedge CSB);
|
@ (posedge CSB);
|
RDYnBSY = 1'b1;
|
RDYnBSY = 1'b1;
|
erasing_chip = 1'b1;
|
erasing_chip = 1'b1;
|
|
|
erase_chip;
|
erase_chip;
|
for(delay =0; delay < tmult; delay = delay+1)
|
for(delay =0; delay < tmult; delay = delay+1)
|
#tCHPEn;
|
#tCHPEn;
|
|
|
WEL = 1'b0;
|
WEL = 1'b0;
|
RDYnBSY = 1'b0;
|
RDYnBSY = 1'b0;
|
erasing_chip = 1'b0;
|
erasing_chip = 1'b0;
|
end
|
end
|
else if(SWP!=2'b00)
|
else if(SWP!=2'b00)
|
begin
|
begin
|
$display("Some or all Sectors in the chip is Protected. Chip Erase cannot be performed");
|
$display("Some or all Sectors in the chip is Protected. Chip Erase cannot be performed");
|
EPE = 1'b1;
|
EPE = 1'b1;
|
disable CE_ ;
|
disable CE_ ;
|
end
|
end
|
|
|
$display ("Chip Erase Completed");
|
$display ("Chip Erase Completed");
|
end
|
end
|
|
|
// ******** Posedge CSB. Stop all reading, recvng. commands/addresses etc. ********* //
|
// ******** Posedge CSB. Stop all reading, recvng. commands/addresses etc. ********* //
|
|
|
always @(posedge CSB)
|
always @(posedge CSB)
|
begin
|
begin
|
disable RA_; // Read Array (low freq and normal freq)
|
disable RA_; // Read Array (low freq and normal freq)
|
disable MIR_; // MIR will stop, if CSB goes high
|
disable MIR_; // MIR will stop, if CSB goes high
|
disable RSR_; // Status reading should stop.
|
disable RSR_; // Status reading should stop.
|
|
|
disable get_opcode; // Stop opcode retrieval
|
disable get_opcode; // Stop opcode retrieval
|
disable get_data; // Stop address/data retrieval
|
disable get_data; // Stop address/data retrieval
|
disable read_out_array; // send data in SO
|
disable read_out_array; // send data in SO
|
disable send_protection_status; // Send Protection status
|
disable send_protection_status; // Send Protection status
|
disable page_program;
|
disable page_program;
|
|
|
temp_data = 8'b0;
|
temp_data = 8'b0;
|
temp_addr = 24'b0;
|
temp_addr = 24'b0;
|
rd_dummy = 1'b0;
|
rd_dummy = 1'b0;
|
status_read = 1'b0;
|
status_read = 1'b0;
|
protected = 1'b0;
|
protected = 1'b0;
|
read_data = 8'b0;
|
read_data = 8'b0;
|
EPE = 1'b0;
|
EPE = 1'b0;
|
|
|
#tDIS SO_on = 1'b0; // SO is now in high-impedance
|
#tDIS SO_on = 1'b0; // SO is now in high-impedance
|
SO_reg = 1'b0;
|
SO_reg = 1'b0;
|
end
|
end
|
|
|
// ********************** Frequeny Checking ********************** //
|
// ********************** Frequeny Checking ********************** //
|
always @ (negedge SCK)
|
always @ (negedge SCK)
|
begin
|
begin
|
tperiod <= $time;
|
tperiod <= $time;
|
tperiod1 <= tperiod;
|
tperiod1 <= tperiod;
|
end
|
end
|
|
|
//always @(tperiod or tperiod1)
|
//always @(tperiod or tperiod1)
|
always @(negedge SCK)
|
always @(negedge SCK)
|
begin
|
begin
|
if ((tperiod - tperiod1) < (tSCKH + tSCKH))
|
if ((tperiod - tperiod1) < (tSCKH + tSCKH))
|
begin
|
begin
|
//freq_error = 1'b1;
|
//freq_error = 1'b1;
|
//$display("Frequency exceeds max limit (14285 ms). Time period detected is %t", (tperiod -tperiod1));
|
//$display("Frequency exceeds max limit (14285 ms). Time period detected is %t", (tperiod -tperiod1));
|
end
|
end
|
else
|
else
|
freq_error = 1'b0;
|
freq_error = 1'b0;
|
|
|
end // always
|
end // always
|
// **************************************************************** //
|
// **************************************************************** //
|
|
|
endmodule
|
endmodule
|
|
|
