Subversion Repositories xmatchpro

--This library is free software; you can redistribute it and/or

--modify it under the terms of the GNU Lesser General Public

--License as published by the Free Software Foundation; either

--version 2.1 of the License, or (at your option) any later version.

--This library 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

--Lesser General Public License for more details.

--You should have received a copy of the GNU Lesser General Public

--License along with this library; if not, write to the Free Software

--Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

-- e_mail : j.l.nunez-yanez@byacom.co.uk

---------------------------------

--  ENTITY       = REG_TEMP     --

--  version      = 1.0         --

--  last update  = 21/08/00    --

--  author       = Jose Nunez  --

---------------------------------

library ieee,dzx;

use ieee.std_logic_1164.all;

use dzx.attributes.all;

use dzx.bit_utils.all;

entity REG_TEMP is

port

(

      DATA_IN : in bit_vector(31 downto 0) ;

      MASK_IN : in bit_vector(3 downto 0) ;

      CLK : in bit ;

          CLEAR : in bit ;

          RESET : in bit;

                ENABLE : in bit;

          DATA_OUT : out std_logic_vector(31 downto 0);

          MASK_OUT : out std_logic_vector(3 downto 0)

);

    end REG_TEMP;

architecture LATCH of REG_TEMP is

signal QOUT : bit_vector(31 downto 0);

signal MOUT : bit_vector(3 downto 0);

begin

FLIP_FLOPS : process (CLK,CLEAR)

begin

        -- asynchronous RESET signal forces all outputs LOW

        if (CLEAR = '0') then

               QOUT <= x"00000000";

                   MOUT <= "1111";

          -- check for +ve clock edge

          elsif ((CLK'event) and (CLK = '1')) then

          -- check for synchronous clear signal

                 if (RESET = '0') then

               QOUT <= x"00000000";

                   MOUT <= "1111";

                 elsif (ENABLE = '0') then

                         QOUT <= DATA_IN;

                         MOUT <= MASK_IN;

                else

                                 QOUT <= QOUT;

                                MOUT <= MOUT;

                 end if;

           end if;

end process FLIP_FLOPS;

DATA_OUT <= To_X01Z(QOUT);

MASK_OUT <= To_X01Z(MOUT);

end LATCH;