UPD78064A Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD78064A

8-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD78062(A), 78063(A), 78064(A)

5.2 Clock Generator

There are two kinds of clocks, main system clock and subsystem clock.

The minimum instruction execution time can also be changed.

• 0.4 µs/0.8 µs/1.6 µs/3.2 µs/6.4 µs/12.8 µs (main system clock: in 5.0 MHz operation)

• 122 µs (subsystem clock: in 32.768 kHz operation)

Figure 5-1. Clock Generator Block Diagram

XT1/P07

XT2

X1

X2

Subsystem fXT

Clock

Oscillator

Main

System

Clock

Oscillator

STOP

fX

Selec-

tor

Scaler

fX

2

Prescaler

fXX

1/2

fXX fXX fXX fXX fXT

2 22 23 24 2

Prescaler

Selec-

tor

Standby

Control

Circuit

Watch Timer

Clock Output Function

Clock to

Peripheral

Hardware

CPU

Clock

(fCPU)

To INTP0

Sampling Clock

5.3 Timer/Event Counter

Five timer/event counter channels are incorporated.

• 16-bit timer/event counter : 1 channel

• 8-bit timer/event counter : 2 channels

• Watch timer

: 1 channel

• Watchdog timer

: 1 channel

Table 5-2. Timer/Event Counter Types and Functions

Type

Function

Interval timer

External event counter

Timer output

PWM output

Pulse width measurement

Square wave output

One-shot pulse output

Interrupt request

Test input

16-bit Timer/

Event Counter

1 channel

1 channel

1 output

1 output

2 inputs

1 output

1 output

2

–

8-bit Timer/

Event Counter

2 channels

2 channels

2 outputs

–

–

2 outputs

–

2

–

Watch Timer

1 channel

–

–

–

–

–

–

2

1 input

Watchdog Timer

1 channel

–

–

–

–

–

–

1

–

20

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