dffrise.vhd

一部分简单时序逻辑电路的VHDL源代码

library IEEE;
use IEEE.std_logic_1164.all;

entity DFF is port (
    d: in std_logic;
    clk: in std_logic;
    end: in std_logic;
    q: out std_logic
    );
end DFF;

architecture rtl of DFF is

begin

  process begin
    wait until rising_edge(clk);
      if en = '1' then
        q <= d;
      end if;
  end process;

end rtl;