Inputs/Output

Inputs

Output

CLRN

PRN

ENA

T

CLK

Q

L

H

X

X

X

L

H

L

X

X

X

H

L

L

X

X

X

Illegal

H

H

L

X

X

Qo*

H

H

H

L

Qo

H

H

H

H

Toggle

H

H

X

X

L

Qo

* Qo = level of Q before clock pulse

All flipflops are positive-edge-triggered.