clk_div.vhd

介绍了各种分频器的设计

library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
entity clk_div is
	port(clk 		:	in std_logic;
		 clk_div6	:	out std_logic);
end clk_div;

ARCHITECTURE a OF clk_div IS
	SIGNAL count : std_logic_vector(2 downto 0);
	constant md :  std_logic_vector(2 downto 0):= "101";
BEGIN
	process(clk)
	begin
	if clk'event and clk='1' then
		if count=md then
				count<=(others=>'0');
			else
				count<=count+1;
			end if;
		end if;
	end process;
	
	process(clk)
	begin
		if clk'event and clk='1' then
			if count=md then
				clk_div6<='1';
			else
				clk_div6<='0';
			end if;
		end if;
	end process;
END a;