aboutsummaryrefslogtreecommitdiffstats
path: root/testsuite/vests/vhdl-ams/ashenden/compliant/misc-topics/tb_SR_flipflop.vhd
blob: f729f0b2ae7696b900914d3f678077d065970937 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc

-- This file is part of VESTs (Vhdl tESTs).

-- VESTs is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License as published by the
-- Free Software Foundation; either version 2 of the License, or (at
-- your option) any later version. 

-- VESTs 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 VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

entity tb_SR_flipflop is
end entity tb_SR_flipflop;


architecture test of tb_SR_flipflop is

  signal s_n, r_n, q, q_n : bit;

begin

  dut : entity work.SR_flipflop
    port map ( s_n, r_n, q, q_n );

  s_n <= '1',
         '0' after 10 ns, '1' after 15 ns,
         '0' after 30 ns, '1' after 40 ns;

  r_n <= '0', '1' after 5 ns,
         '0' after 20 ns, '1' after 25 ns,
         '0' after 30 ns, '1' after 35 ns;

end architecture test;