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nothing
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nothing
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Author(s):
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Author(s):
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- Dinesh Annayya, dinesha@opencores.org
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- Dinesh Annayya, dinesha@opencores.org
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Version : 1.0 - 8th Jan 2012
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Version : 1.0 - 8th Jan 2012
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Initial version with 16/32 Bit SDRAM Support
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: 1.1 - 24th Jan 2012
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8 Bit SDRAM Support is added
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Copyright (C) 2000 Authors and OPENCORES.ORG
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Copyright (C) 2000 Authors and OPENCORES.ORG
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This source file may be used and distributed without
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This source file may be used and distributed without
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// Global Variable
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// Global Variable
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// ----------------------------------------------
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// ----------------------------------------------
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input clk ; // SDRAM Clock
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input clk ; // SDRAM Clock
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input pad_clk ; // SDRAM Clock from Pad, used for registering Read Data
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input pad_clk ; // SDRAM Clock from Pad, used for registering Read Data
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input reset_n ; // Reset Signal
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input reset_n ; // Reset Signal
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input sdr_width ; // 0 - 32 Bit SDR, 1 - 16 Bit SDR
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input [1:0] sdr_width ; // 2'b00 - 32 Bit SDR, 2'b01 - 16 Bit SDR, 2'b1x - 8 Bit
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input [1:0] cfg_colbits ; // 2'b00 - 8 Bit column address, 2'b01 - 9 Bit, 10 - 10 bit, 11 - 11Bits
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input [1:0] cfg_colbits ; // 2'b00 - 8 Bit column address, 2'b01 - 9 Bit, 10 - 10 bit, 11 - 11Bits
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//------------------------------------------------
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//------------------------------------------------
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// Request from app
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// Request from app
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// synopsys translate_off
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// synopsys translate_off
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wire [3:0] sdr_cmd;
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wire [3:0] sdr_cmd;
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assign sdr_cmd = {sdr_cs_n, sdr_ras_n, sdr_cas_n, sdr_we_n};
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assign sdr_cmd = {sdr_cs_n, sdr_ras_n, sdr_cas_n, sdr_we_n};
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// synopsys translate_on
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// synopsys translate_on
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assign sdr_den_n = sdr_width ? {2'b00,sdr_den_n_int[1:0]} : sdr_den_n_int;
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assign sdr_den_n = sdr_den_n_int ;
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assign sdr_dout = sdr_width ? {16'h0000,sdr_dout_int[15:0]} : sdr_dout_int;
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assign sdr_dout = sdr_dout_int ;
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/****************************************************************************/
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/****************************************************************************/
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// Instantiate sdr_req_gen
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// Instantiate sdr_req_gen
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// This module takes requests from the app, chops them to burst booundaries
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// This module takes requests from the app, chops them to burst booundaries
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