comclk.vhd

电子打铃器 在max plus 2 下编译通过

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
use ieee.std_logic_arith.all;
ENTITY comclk IS
	PORT(
		sel: IN	STD_LOGIC_VECTOR(2 downto 0);
		clk:in std_logic;
		comclk: OUT STD_LOGIC);
END comclk;

ARCHITECTURE a OF comclk IS
begin
    process(sel)
		begin
			if sel="000" then
			   comclk<=clk;
			else
				comclk<='0';
			end if;
	end process;
end a;