priority.vhd

来自「VHDL子程序集,包括各种例程资料以及源码.」· VHDL 代码 · 共 27 行

--***********************************
--*  PRIORITY WHEN .....ELSE ...... *
--*        Filename : PRIORITY      *
--***********************************

library IEEE;
use IEEE.std_logic_1164.all;

entity PRIORITY is
    port (
          A: in STD_LOGIC;
          B: in STD_LOGIC;
          C: in STD_LOGIC;
          X: in STD_LOGIC;
          Y: in STD_LOGIC;
          F: out STD_LOGIC
         );
end PRIORITY;

architecture PRIORITY_arch of PRIORITY is

begin
   F <= A when X ='1' else
        B when Y ='1' else
        C;
end PRIORITY_arch;