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[/] [raptor64/] [trunk/] [rtl/] [verilog/] [memory/] [internal/] [syncRam2kx8_1rw1r.v] - Rev 13
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// ============================================================================ // 2006-2012 Robert Finch // All Rights Reserved. // robfinch@<remove>@opencores.org // // syncRam2kx8_1rw1r.v // // This source file is free software: you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as published // by the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // This source file is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program. If not, see <http://www.gnu.org/licenses/>. // // ============================================================================ // `define SYNTHESIS `define VENDOR_XILINX `define SPARTAN3 module syncRam2kx8_1rw1r( input wrst, input wclk, input wce, input we, input [10:0] wadr, input [7:0] i, output [7:0] wo, input rrst, input rclk, input rce, input [10:0] radr, output [7:0] o ); `ifdef SYNTHESIS `ifdef VENDOR_XILINX `ifdef SPARTAN3 RAMB16_S9_S9 ram0( .CLKA(wclk), .ADDRA(wadr), .DIA(i), .DIPA(^i), .DOA(wo), .ENA(wce), .WEA(we), .SSRA(wrst), .CLKB(rclk), .ADDRB(radr), .DIB(8'hFF), .DIPB(1'b1), .DOB(o), .ENB(rce), .WEB(1'b0), .SSRB(rrst) ); `endif `ifdef SPARTAN2 RAMB4_S2_S2 ram0( .CLKA(wclk), .ADDRA(wadr), .DIA(i[1:0]), .DOA(wo[1:0]), .ENA(wce), .WEA(we), .RSTA(wrst), .CLKB(rclk), .ADDRB(radr), .DIB(2'b11), .DOB(o[1:0]), .ENB(rce), .WEB(1'b0), .RSTB(rrst) ); RAMB4_S2_S2 ram1( .CLKA(wclk), .ADDRA(wadr), .DIA(i[3:2]), .DOA(wo[3:2]), .ENA(wce), .WEA(we), .RSTA(wrst), .CLKB(rclk), .ADDRB(radr), .DIB(2'b11), .DOB(o[3:2]), .ENB(rce), .WEB(1'b0), .RSTB(rrst) ); RAMB4_S2_S2 ram2( .CLKA(wclk), .ADDRA(wadr), .DIA(i[5:4]), .DOA(wo[5:4]), .ENA(wce), .WEA(we), .RSTA(wrst), .CLKB(rclk), .ADDRB(radr), .DIB(2'b11), .DOB(o[5:4]), .ENB(rce), .WEB(1'b0), .RSTB(rrst) ); RAMB4_S2_S2 ram3( .CLKA(wclk), .ADDRA(wadr), .DIA(i[7:6]), .DOA(wo[5:4]), .ENA(wce), .WEA(we), .RSTA(wrst), .CLKB(rclk), .ADDRB(radr), .DIB(2'b11), .DOB(o[5:4]), .ENB(rce), .WEB(1'b0), .RSTB(rrst) ); `endif `endif `ifdef VENDOR_ALTERA `endif `else reg [7:0] mem [2047:0]; reg [10:0] rradr; reg [10:0] rwadr; // register read addresses always @(posedge rclk) if (rce) rradr <= radr; assign o = mem[rradr]; // write side always @(posedge wclk) if (wce) rwadr <= wadr; always @(posedge wclk) if (wce) mem[wadr] <= i; assign wo = mem[rwadr]; `endif endmodule
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