git.zerfleddert.de Git - raggedstone/blob - dhwk/source/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    SIG_REG <= X"00";
  30                                 elsif   WRITE   =       '1'     then    SIG_REG <= REG_IN;
  31                                 else                                                                            SIG_REG <= SIG_REG;
  32                 end if;
  33                 end if;
  34         end process;
  35
  36         REG_OUT <= SIG_REG;
  37
  38 end architecture REG_DESIGN;