////////////////////////////////////////////////////////////////////// //// //// //// File name "frame_crit.v" //// //// //// //// This file is part of the "PCI bridge" project //// //// http://www.opencores.org/cores/pci/ //// //// //// //// Author(s): //// //// - Miha Dolenc (mihad@opencores.org) //// //// //// //// All additional information is avaliable in the README //// //// file. //// //// //// //// //// ////////////////////////////////////////////////////////////////////// //// //// //// Copyright (C) 2001 Miha Dolenc, mihad@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 //// //// //// ////////////////////////////////////////////////////////////////////// // // CVS Revision History // // $Log: pci_frame_crit.v,v $ // Revision 1.1 2007-03-20 17:50:56 sithglan // add shit // // Revision 1.1 2003/01/27 16:49:31 mihad // Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed. // // Revision 1.3 2002/02/01 15:25:12 mihad // Repaired a few bugs, updated specification, added test bench files and design document // // Revision 1.2 2001/10/05 08:14:28 mihad // Updated all files with inclusion of timescale file for simulation purposes. // // Revision 1.1.1.1 2001/10/02 15:33:46 mihad // New project directory structure // // // module is used to separate logic which uses criticaly constrained inputs from slower logic. // It is used to synthesize critical timing logic separately with faster cells or without optimization // synopsys translate_off `include "timescale.v" // synopsys translate_on // this one is used in master state machine for driving correct value of frame output module pci_frame_crit ( pci_frame_out, force_frame_in, slow_frame_in, pci_stop_in ) ; output pci_frame_out ; input force_frame_in, slow_frame_in, pci_stop_in ; assign pci_frame_out = force_frame_in && (slow_frame_in || ~pci_stop_in) ; endmodule