1 • • (Flip Flop, FF) – • • – • • • • 2 5.6 D FF FF FF FF 5.7 (edge trigger) D 5.8 register 3 5.9 SR-FF (1,1) a b Q next Q Qnext J K Q X X X Q X X JK 5.10 – JK J K T T 1 T-FF T-FF a b T Q next Q Q next T Q Q 5.11 4 3. 1 SR JK 2 T JK 3 JK SR 4 JK D 5 D JK 6 D T