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/****************************************************************************************

 MODULE:                Sub Level Memory Block

 FILE NAME:     mem.v

 VERSION:       1.0

 DATE:          September 28th, 2001

 AUTHOR:                Hossein Amidi

 COMPANY:       California Unique Electrical Co.

 CODE TYPE:     Behavioral Level

 Instantiations:

 DESCRIPTION:

 Sub Level Behavioral Memory Block, It uses 12 Address and 16 Data Line

 the memory size would be 2 ^ 12 = 4096 * 16-bit wide = 65536 bits.

 65536 bits / 8 = 8192 Byte ->  8K Byte of memory.

 This memory is organized as 4096 locations of 16-bit (2 Byte) wide.

 Hossein Amidi

 (C) September 2001

 California Unique Electric

***************************************************************************************/

`timescale 1ns / 1ps

module MEM (// Input

                                DataIn,

                                Address,

                                MemReq,

                                RdWrBar,

                                clock,

                                // Output

                                DataOut

                                );

// Parameter

parameter words = 4096;

parameter AccessTime = 0;

parameter DataWidth = 32;

parameter AddrWidth = 24;

// Input

input [DataWidth - 1 : 0] DataIn;

input [AddrWidth - 1 : 0] Address;

input MemReq;

input RdWrBar;

input clock;

// Output

output [DataWidth - 1 : 0] DataOut;

// Internal Memory Declerations

// 4096 x 16 bit wide

reg [DataWidth - 1 : 0] MEM_Data [0:words-1];

// Signal Declerations

wire [DataWidth - 1 : 0] Data;

// Assignments

// Read Cycle

assign Data = (MemReq && RdWrBar)? MEM_Data [Address]:32'hz;

assign #AccessTime DataOut = Data; // Delay in a continuous assign

// Write Cycle

always @(posedge clock)

begin

        if(MemReq && ~RdWrBar)

                MEM_Data [Address] <= DataIn;

end

endmodule