Inputs/Output

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Inputs

Output

PRN

CLRN

CLK

S

R

Q

L

H

X

X

X

H

H

L

X

X

X

L

L

L

X

X

X

Illegal

H

H

L

X

X

Qo*

H

H



L

L

Qo

H

H



H

L

H

H

H



L

H

L

H

H



H

H

Toggle

* Qo = level of Q before clock pulse

All flipflops are positive-edge-triggered.