Microsoft Word - Digital Logic Design v_4_6a

 K-map for flip-flops
K-maps can be generated based on flip-flops PS/NS table. The following K-map is for a SR flip-flop.

 Note:

Minterms 3, 4 and 7 are unstable and shown on K-map without an underlined. As stated earlier,

unstable state will change after the ∆t delay.

0 1

0 0

0 0

1 1

SR

Q

00

01

11

10

0 1

Q+ (S,R,Q) = Q.R+S.R

S R Q+

0 0 Q

0 1 0

1 0 1

1 1 0 (reset dominant)