kdf.vhd

数字密码引爆器的输入描述：1、 在开始输入密码以前的等待状态

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;

entity kdf is 
  port( A,CLK : in std_logic;
        C,D  :out std_logic);
end entity;

architecture kdf_behave of kdf is

begin
  process(CLK)
  begin
    if(CLK'event and CLK='1')then
       C<=A;
       D<=not A;
    end if;
  end process;

end kdf_behave;