vhdlquanjiaqi.doc
来自「这是一个利用MAX PULL 制作的VHDL的全加器的程序 如果有需要仿真图的 」· DOC 代码 · 共 23 行
DOC
23 行
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
entity aa is
port
( a1: in std_logic;
b1: in std_logic;
cin: in std_logic;
bcdout: out std_logic;
cout: out std_logic );
end aa;
architecture arch of aa is
signal y,c:std_logic;
begin
y<=a1 xor b1 xor cin;
c<=(cin and a1) or (cin and b1) or (a1 and b1);
bcdout<=y;
cout<=c;
end arch;
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