Subversion Repositories xucpu

-- Copyright 2015, Jürgen Defurne

--

-- This file is part of the Experimental Unstable CPU System.

--

-- The Experimental Unstable CPU System 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 3 of the

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

--

-- The Experimental Unstable CPU System 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 Experimental Unstable CPU System. If not, see

-- http://www.gnu.org/licenses/lgpl.txt.

LIBRARY ieee;

USE ieee.std_logic_1164.ALL;

ENTITY pipeline_reg IS

  PORT (

    D   : IN  STD_LOGIC_VECTOR(7 DOWNTO 0);

    Q   : OUT STD_LOGIC_VECTOR(7 DOWNTO 0);

    CLK : IN  STD_LOGIC;

    EN  : IN  STD_LOGIC);

END ENTITY pipeline_reg;

ARCHITECTURE Behavioral OF pipeline_reg IS

BEGIN  -- ARCHITECTURE Behavioral

  PROCESS (CLK) IS

  BEGIN  -- PROCESS

    IF rising_edge(CLK) THEN

      IF EN = '1' THEN

        Q <= D;

      END IF;

    END IF;

  END PROCESS;

END ARCHITECTURE Behavioral;