nor3.vhd

来自「VHDL子程序集,包括各种例程资料以及源码.」· VHDL 代码 · 共 21 行

--*****************************************
--* 3 Input NOR Gate Using WHEN ... ELSE  *
--*             Filename : NOR3           *
--*****************************************

library IEEE;
use IEEE.std_logic_1164.all;

entity NOR3 is
    port (
          A: in STD_LOGIC_VECTOR (2 downto 0);
          F: out STD_LOGIC
         );
end NOR3;

architecture NOR3_arch of NOR3 is

begin
    F <= '1' when A = "000" else '0'; 
end NOR3_arch;