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[/] [natalius_8bit_risc/] [trunk/] [processor_core/] [LIFO.v] - Rev 11
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`timescale 1ns / 1ps ////////////////////////////////////////////////////////////////////////////////// // Company: // Engineer: // // Create Date: 11:39:35 05/16/2012 // Design Name: // Module Name: LIFO // Project Name: // Target Devices: // Tool versions: // Description: // // Dependencies: // // Revision: // Revision 0.01 - File Created // Additional Comments: // ////////////////////////////////////////////////////////////////////////////////// module LIFO( input clk, input rst, input wr_en, input rd_en, input [10:0] din, output [10:0] dout ); (* RAM_STYLE="DISTRIBUTED" *) reg [3:0] addr; reg [10:0] ram [15:0]; always@(posedge clk) if (rst) addr<=0; else begin if (wr_en==0 && rd_en==1) //leer if (addr>0) addr<=addr-1; if (wr_en==1 && rd_en==0) //guardar if (addr<15) addr<=addr+1; end always @(posedge clk) if (wr_en) ram[addr] <= din; assign dout = ram[addr]; endmodule
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