-- +-----------------------------+
-- |         Library: FF         |
-- |    designer : Tim Pagden    |
-- |     opened:  6 Jun 1993     |
-- +-----------------------------+

-- Function: D-type transparent latch
--           with active LOW enable

library ieee;
  use ieee.std_logic_1164.all;

entity d_latch is
port (
  d      : in  std_logic;
  enable : in  std_logic;
  q      : out std_logic
);
end d_latch;

architecture behaviour of d_latch is

begin

  latch_d: process (enable, d)
  begin
    if enable='0' then
      q <= d;
    end if;
  end process;

end behaviour;