D78046HGF データシートの表示（PDF） - NEC => Renesas Technology

部品番号

コンポーネント説明

メーカー

D78046HGF

8-BIT SINGLE-CHIP MICROCOMPUTER / UPD78044H

NEC => Renesas Technology 

µPD78044H, 78045H, 78046H

5.2 CLOCK GENERATOR CIRCUIT

The clock generator circuit has two kinds of generator circuits: the main system clock and subsystem clock.

The instruction time can be changed.

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

• 122 µs (with subsystem clock: 32.768 kHz)

Fig. 5-1 Clock Generator Circuit Block Diagram

XT1/P04

XT2

Subsystem

fXT

clock generator

circuit

Clock output circuit

Noise

fX

eliminator

8

fX

16

X1

Main system

clock generator

X2

circuit

fX

Pre-scaler

fX fX fX fX

2 22 23 24

STOP

Watch timer

1

2

fXT

2

Pre-scaler

Clock to

hardware peripherals

Standby

control

circuit

CPU clock (fCPU)

To INTP0

sampling clock

5.3 TIMER/EVENT COUNTER

Five channels of timer/event counters are provided.

• 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 Groups and Configurations

Interval timer

External event counter

Timer output

PWM output

Pulse width measurement

Square wave output

Interrupt request

Test input

16-bit timer/

event counter

1 channel

1 channel

1 output

1 output

1 input

1 output

1

—

8-bit timer/

event counter

2 channels

—

2 outputs

—

—

2 outputs

2

—

Watch

timer

1 channel

—

—

—

—

—

1

1 input

Watchdog

timer

1 channel

—

—

—

—

—

1

—

17

Share Link: