ls273.vhd

在软件MAX+plus II环境中

LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
ENTITY LS273 IS
PORT(
     D:IN STD_LOGIC_VECTOR(7 DOWNTO 0);
     CLK:IN STD_LOGIC;
     O:OUT STD_LOGIC_VECTOR(7 DOWNTO 0) 
    );
END LS273;
ARCHITECTURE A OF LS273 IS
BEGIN
  PROCESS(CLK)
  BEGIN
    IF(CLK'EVENT AND CLK='1') THEN
     O<=D;
    END IF;
  END PROCESS;
END A;