git.zerfleddert.de Git - raggedstone/blob - dhwk/source/pci/reg.vhd

   1 -- J.STELZNER
   2 -- INFORMATIK-3 LABOR
   3 -- 23.08.2006
   4 -- File: REG.VHD
   5
   6 library ieee;
   7 use ieee.std_logic_1164.all;
   8
   9 entity REG is
  10         port
  11         (
  12                 CLOCK :in std_logic;
  13                 RESET :in std_logic;
  14                 WRITE :in std_logic;
  15                 REG_IN :in std_logic_vector(7 downto 0);
  16                 REG_OUT :out std_logic_vector(7 downto 0)
  17         );
  18 end entity REG;
  19
  20 architecture REG_DESIGN of REG is
  21
  22         signal SIG_REG :std_logic_vector (7 downto 0);
  23
  24 begin
  25
  26         process (CLOCK)
  27         begin
  28                 if (CLOCK'event and CLOCK = '1') then
  29                         if RESET = '1' then
  30                                 SIG_REG <= X"00";
  31
  32                         elsif WRITE = '1' then
  33                                 SIG_REG <= REG_IN;
  34
  35                         else
  36                                 SIG_REG <= SIG_REG;
  37                         end if;
  38                 end if;
  39         end process;
  40
  41         REG_OUT <= SIG_REG;
  42
  43 end architecture REG_DESIGN;