以下程序使用的语句是( ) LIBRARY IEEE;USE IEE
E:STD_LOGIC_1164.ALL;ENTITY MUX4 IS PORT(I0,I1,I2,I3,A,
B:IN STD_LOGIC;Q:OUT STD_LOGIC);END MUX4;ARCHITECTURE ART OF MUX4 IS SIGNAL SEL:STD_LOGIC_VECTOR(1 DOWNTO 0);BEGIN SEL=B&A; Q<=I0 WHEN SEL=”00” ELSE I1 WHEN SEL=”01” ELSE I2 WHEN SEL=”10” ELSE I3 WHEN SEL=”11” ELSE ‘X’;END ART;
选项:
A:条件信号赋值语句;
B:选择信号赋值语句;
C:IF;
D:CASE语句
发布时间:2024-06-09 15:01:59