Subject: Digital System Design

Topic: Design of Sequential circuits using VHDL

Difficulty: High

VHDL Code for T FlipFlop

library IEEE;

use IEEE.STD_LOGIC_1164.ALL;

entity T_FF is

port( T: in std_logic;

Clock: in std_logic;

Q: out std_logic);

end T_FF;

architecture Behavioral of T_FF is

signal tmp: std_logic;

begin

process (Clock)

begin

if Clock'event and Clock='1' then

if T='0' then

tmp <= tmp;

elsif T='1' then

tmp <= not (tmp);

end if;

end if;

end process;

Q <= tmp;

end Behavioral;