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Version : 0.0 - 8th Jan 2012
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Version : 0.0 - 8th Jan 2012
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Initial version with 16/32 Bit SDRAM Support
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Initial version with 16/32 Bit SDRAM Support
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: 0.1 - 24th Jan 2012
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: 0.1 - 24th Jan 2012
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8 Bit SDRAM Support is added
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8 Bit SDRAM Support is added
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0.2 - 2nd Feb 2012
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0.2 - 2nd Feb 2012
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Improved the command pipe structure to accept up-to 4 command of different bank.
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Improved the command pipe structure to accept up-to
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4 command of different bank.
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0.3 - 7th Feb 2012
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Bug fix for parameter defination for request length has changed from 9 to 12
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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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parameter APP_RW = 9; // Application Request Width
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parameter APP_RW = 9; // Application Request Width
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parameter SDR_DW = 16; // SDR Data Width
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parameter SDR_DW = 16; // SDR Data Width
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parameter SDR_BW = 2; // SDR Byte Width
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parameter SDR_BW = 2; // SDR Byte Width
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parameter REQ_BW = 12; // Request Width
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//-----------------------------------------------
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//-----------------------------------------------
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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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// SDR_REQ_GEN
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// SDR_REQ_GEN
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wire [`SDR_REQ_ID_W-1:0]r2b_req_id;
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wire [`SDR_REQ_ID_W-1:0]r2b_req_id;
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wire [1:0] r2b_ba;
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wire [1:0] r2b_ba;
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wire [11:0] r2b_raddr;
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wire [11:0] r2b_raddr;
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wire [11:0] r2b_caddr;
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wire [11:0] r2b_caddr;
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wire [APP_RW-1:0] r2b_len;
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wire [REQ_BW-1:0] r2b_len;
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// SDR BANK CTL
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// SDR BANK CTL
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wire [`SDR_REQ_ID_W-1:0]b2x_id;
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wire [`SDR_REQ_ID_W-1:0]b2x_id;
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wire [1:0] b2x_ba;
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wire [1:0] b2x_ba;
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wire [11:0] b2x_addr;
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wire [11:0] b2x_addr;
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wire [APP_RW-1:0] b2x_len;
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wire [REQ_BW-1:0] b2x_len;
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wire [1:0] b2x_cmd;
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wire [1:0] b2x_cmd;
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// SDR_XFR_CTL
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// SDR_XFR_CTL
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wire [3:0] x2b_pre_ok;
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wire [3:0] x2b_pre_ok;
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wire [`SDR_REQ_ID_W-1:0]xfr_id;
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wire [`SDR_REQ_ID_W-1:0]xfr_id;
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