13 March, 2000
The quiz
Flip-flops
- memory elements
- common features
- control/data input
- clock
- positive edge
- negative edge
- asynchronous set and clear
- common types
Tables for flip-flops
SR flip flop |
characteristic table |
S |
R |
Q |
0 |
0 |
Q |
0 |
1 |
0 |
1 |
0 |
1 |
1 |
1 |
|
SR flip flop |
excitation table |
Qold |
Qnew |
S |
R |
0 |
0 |
0 |
X |
0 |
1 |
1 |
0 |
1 |
0 |
0 |
1 |
1 |
1 |
X |
0 |
JK flip flop |
characteristic table |
J |
K |
Q |
0 |
0 |
Q |
0 |
1 |
0 |
1 |
0 |
1 |
1 |
1 |
Q' |
JK flip flop |
excitation table |
Qold |
Qnew |
J |
K |
0 |
0 |
0 |
X |
0 |
1 |
1 |
X |
1 |
0 |
X |
1 |
1 |
1 |
X |
0 |
D flip flop |
characteristic table |
D |
Q |
0 |
0 |
1 |
1 |
D flip flop |
excitation table |
Qold |
Qnew |
D |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
0 |
0 |
1 |
1 |
1 |
T flip flop |
characteristic table |
T |
Q |
0 |
Q |
1 |
Q' |
T flip flop |
excitation table |
Qold |
Qnew |
T |
0 |
0 |
0 |
0 |
1 |
1 |
1 |
0 |
1 |
1 |
1 |
0 |