8

Timing Diagram

Sequence illustrated on waveforms:

1. Reset outputs to zero.

2. Preset to binary twelve.

3. Count to thirteen, fourteen, fifteen, zero, one, and two.

4. Inhibit.

MASTER RESET (161)

MASTER RESET (163)

SPE

P0

P1

P2

P3

PRESET

DATA

CP (161)

CP (163)

PE

TE

COUNT

ENABLES

Q0

Q1

Q2

Q3

OUTPUTS

TC

RESET

PRESET

COUNT

INHIBIT

(ASYNCHRONOUS)

(SYNCHRONOUS)

12

13

14

15

0

1

2

INPUTS

CD74HC161, CD74HCT161, CD74HC163, CD74HCT163