UPD78014 datasheet(18/62 Pages) NEC

18 / 62 page

µPD78001B(A), 78002B(A)

5.3

TIMER/EVENT COUNTER

The following four channels are incorporated in the timer/event counter.

• 8-bit timer/event counter

: 2 channels

• Watch timer

: 1 channel

• Watchdog timer

: 1 channel

Table 5-2 Types and Features of Timer/Event Counter

Fig. 5-2 8-Bit Timer/Enent Counter Block Diagram

Type

Interval timer

2 channels

1 channel

External event counter

2 channels

–

Functions

Timer output

2 outputs

–

Sqare wave output

2 outputs

–

Interrupt request

8-bit Timer/Event Counter

Watch Timer

Watchdog Timer

Internal Bus

8-Bit Compare

8-Bit Timer

Clear

Output

Control

Circuit

Output

Control

Circuit

INTTM1

TO2/P32

INTTM2

TO1/P31

Clear

Match

Selector

8-Bit Compare

8-Bit Timer

Internal Bus

Selector

Match

fX/2 – fX/210

fX/212

TI1/P33

fX/2 – fX/210

fX/212

TI1/P34

Selector

UPD78014 Datasheet(PDF) 18 Page - NEC

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