Before revision: T flip-flop States Input Present Next T 0 0 0 0 1 1 1 0 1 1 1 0 The characteristic equation of a T flip-flop is URL SR flip-flop ("X" is "don't care") StatesInputs Present Next S R 0 0 0 X 0 1 1 0 1 0 0 1 1 1 X 0 The characteristic equation of a SR flip-flop is .
After revision: T flip-flop States Input Present Next T 0 0 0 0 0 1 1 0 1 1 1 0 The characteristic equation of a T flip-flop is URL SR flip-flop ("X" is "don't care") StatesInputs Present Next S R 0 0 0 X 0 1 1 0 1 0 0 1 1 1 X 0 The characteristic equation of a SR flip-flop is .