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1 | ////////////////////////////////////////////////////////////////////// |
2 | //// //// |
3 | //// File name "pci_io_mux_ad_en_crit.v" //// |
4 | //// //// |
5 | //// This file is part of the "PCI bridge" project //// |
6 | //// http://www.opencores.org/cores/pci/ //// |
7 | //// //// |
8 | //// Author(s): //// |
9 | //// - Miha Dolenc (mihad@opencores.org) //// |
10 | //// //// |
11 | //// All additional information is avaliable in the README //// |
12 | //// file. //// |
13 | //// //// |
14 | //// //// |
15 | ////////////////////////////////////////////////////////////////////// |
16 | //// //// |
17 | //// Copyright (C) 2001 Miha Dolenc, mihad@opencores.org //// |
18 | //// //// |
19 | //// This source file may be used and distributed without //// |
20 | //// restriction provided that this copyright statement is not //// |
21 | //// removed from the file and that any derivative work contains //// |
22 | //// the original copyright notice and the associated disclaimer. //// |
23 | //// //// |
24 | //// This source file is free software; you can redistribute it //// |
25 | //// and/or modify it under the terms of the GNU Lesser General //// |
26 | //// Public License as published by the Free Software Foundation; //// |
27 | //// either version 2.1 of the License, or (at your option) any //// |
28 | //// later version. //// |
29 | //// //// |
30 | //// This source is distributed in the hope that it will be //// |
31 | //// useful, but WITHOUT ANY WARRANTY; without even the implied //// |
32 | //// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// |
33 | //// PURPOSE. See the GNU Lesser General Public License for more //// |
34 | //// details. //// |
35 | //// //// |
36 | //// You should have received a copy of the GNU Lesser General //// |
37 | //// Public License along with this source; if not, download it //// |
38 | //// from http://www.opencores.org/lgpl.shtml //// |
39 | //// //// |
40 | ////////////////////////////////////////////////////////////////////// |
41 | // |
42 | // CVS Revision History |
43 | // |
44 | // $Log: pci_io_mux_ad_en_crit.v,v $ |
45 | // Revision 1.1 2007-03-20 17:50:56 sithglan |
46 | // add shit |
47 | // |
48 | // Revision 1.2 2003/01/27 16:49:31 mihad |
49 | // Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed. |
50 | // |
51 | // Revision 1.1 2002/02/01 14:43:31 mihad |
52 | // *** empty log message *** |
53 | // |
54 | // |
55 | |
56 | // module provides equation for ad output enables, which uses critical pci bus inputs |
57 | |
58 | // synopsys translate_off |
59 | `include "timescale.v" |
60 | // synopsys translate_on |
61 | |
62 | // module is provided for ad bus output enable Flip-Flops values |
63 | module pci_io_mux_ad_en_crit |
64 | ( |
65 | ad_en_in, |
66 | pci_frame_in, |
67 | pci_trdy_in, |
68 | pci_stop_in, |
69 | ad_en_out |
70 | ); |
71 | input ad_en_in, |
72 | pci_frame_in, |
73 | pci_trdy_in, |
74 | pci_stop_in ; |
75 | output ad_en_out ; |
76 | |
77 | assign ad_en_out = ad_en_in && ( ~pci_frame_in || (pci_trdy_in && pci_stop_in) ) ; |
78 | endmodule |