dflipflop.vhd

this program performs the functonality of 4 bit alu

--d flipflop
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;

--din is switch i/p
--dout and ndout are o/ps routed to o/p leds
--row is the o/p and pulse is the push botton switch i/p 
entity dflipflop is
			  Port (   din : in std_logic;
                   dout : out std_logic;
			         clk : in std_logic);
				       
end dflipflop;

architecture Behavioral of dflipflop is
--local signal declaration
 
 --subcomponent declaration
 
--component instsntiation	
begin


process(clk)
begin
	if clk'event and clk='1' then	 
		
	  		dout <= din;
			--ndout <= not din;
end if;


end process;
end Behavioral;