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

   1 -- J.STELZNER
   2 -- INFORMATIK-3 LABOR
   3 -- 23.08.2006
   4 -- File: ADDR_REG.VHD
   5
   6 library IEEE;
   7 use IEEE.std_logic_1164.all;
   8
   9 entity ADDR_REGI is
  10         port
  11         (
  12         PCI_CLOCK                       :in             std_logic;
  13         PCI_RSTn                        :in             std_logic;
  14         LOAD_ADDR_REG   :in             std_logic;
  15         AD_REG                          :in             std_logic_vector (31 downto 0);
  16         ADDR_REG                        :out    std_logic_vector (31 downto 0)
  17   );
  18 end entity ADDR_REGI;
  19
  20 architecture ADDR_REGI_DESIGN of ADDR_REGI is
  21
  22         signal  REG_ADDR        :std_logic_vector (31 downto 0);
  23
  24 begin
  25
  26         process (PCI_CLOCK, PCI_RSTn)
  27         begin
  28                 if      PCI_RSTn = '0'  then    REG_ADDR        <= X"00000000";
  29
  30                 elsif (PCI_CLOCK'event and PCI_CLOCK = '1') then
  31
  32                         if LOAD_ADDR_REG = '1' then
  33                                                 REG_ADDR        <=      AD_REG;
  34
  35                         else    REG_ADDR        <=      REG_ADDR;
  36                         end if;
  37
  38                 end if;
  39         end process;
  40
  41         ADDR_REG        <=      REG_ADDR;
  42
  43 end architecture ADDR_REGI_DESIGN;