8位相等比较器.txt

4位乘法器,4位除法器 8位数据锁存器,8位相等比较器,带同步复位的状态 机,元件例化与层次设计,最高优先级编码器

-- 8-bit Identity Comparator
-- uses 1993 std VHDL
-- download from www.pld.com.cn & www.fpga.com.cn

library IEEE;
use IEEE.Std_logic_1164.all;
entity HCT688 is  
   port(Q, P : in std_logic_vector(7 downto 0);
         GBAR : in std_logic; PEQ : out std_logic);
end HCT688;

architecture VER1 of HCT688 is
begin
   PEQ <= '0' when ((To_X01(P) = To_X01(Q)) and (GBAR = '0')) else '1';
end VER1;