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[/] [turbo8051/] [trunk/] [rtl/] [lib/] [sfifo.v] - Rev 11
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////////////////////////////////////////////////////////////////////// //// //// //// Tubo 8051 cores common library Module //// //// //// //// This file is part of the Turbo 8051 cores project //// //// http://www.opencores.org/cores/turbo8051/ //// //// //// //// Description //// //// Turbo 8051 definitions. //// //// //// //// To Do: //// //// nothing //// //// //// //// Author(s): //// //// - Dinesh Annayya, dinesha@opencores.org //// //// //// ////////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2000 Authors and OPENCORES.ORG //// //// //// //// This source file may be used and distributed without //// //// restriction provided that this copyright statement is not //// //// removed from the file and that any derivative work contains //// //// the original copyright notice and the associated disclaimer. //// //// //// //// 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 2.1 of the License, or (at your option) any //// //// later version. //// //// //// //// This source 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 Lesser General Public License for more //// //// details. //// //// //// //// You should have received a copy of the GNU Lesser General //// //// Public License along with this source; if not, download it //// //// from http://www.opencores.org/lgpl.shtml //// //// //// ////////////////////////////////////////////////////////////////////// module sfifo (QA,CLKA,CENA,AA,CLKB,CENB,AB,DB); parameter DW = 10; // Data Width parameter AW = 5; // Address Width parameter FW = 32; // FIFO DEPTH output [DW-1:0] QA; input CLKA; input CENA; input [AW-1:0] AA; input CLKB; input CENB; input [AW-1:0] AB; input [DW-1:0] DB; reg [DW-1:0] QA; reg [DW-1:0] ram [FW-1:0]; always @ (posedge CLKB) begin if (!CENB) ram[AB] <= DB; end always @ (posedge CLKA) begin if (!CENA) QA <= ram[AA]; end endmodule
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