Inputs/Output

Inputs

Output

ENA

PRN

CLRN

CLK

S

R

Q

X

L

H

X

X

X

H

X

H

L

X

X

X

L

X

L

L

X

X

X

Illegal

X

H

H

L

X

X

Qo*

X

H

H

L

L

Qo

X

H

H

H

L

H

X

H

H

L

H

L

X

H

H

H

H

Toggle

L

H

H

X

X

X

Qo

* Qo = level of Q before clock pulse

All flipflops are positive-edge-triggered.