UPD178004AGC 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD178004AGC

8-BIT SINGLE-CHIP MICROCONTROLLERS

NEC => Renesas Technology 

µPD178004A, 178006A, 178016A, 178018A

5.2 CLOCK GENERATOR

The instruction execution time can be changed as follows.

0.44 µs/0.88 µs/1.78 µs/3.56 µs/7.11 µs/14.22 µs (@ 4.5-MHz crystal oscillator with system clock.)

Figure 5-1. Clock Generator Block Diagram

Prescaler

Clock to the PLL

frequency synthesizer,

basic timer and buzzer

output control circuit.

X1

System fX

Clock to peripheral

Clock

X2

Oscillator

Selector

fXX

Prescaler

hardware other than

the above.

Scaler

fXX fXX fXX fXX

2 22 23 24

fX

STOP

2

Selector

Standby

Control

Circuit

Wait Control

Circuit

CPU Clock

(fCPU)

To INTP0

Sampling Clock

5.3 TIMER

The µPD178004A, 178006A, 178016A, and 178018A incorporate 5 channels of the timer.

• Basic timer

: 1 channel

• 8-bit timer/event counter

: 2 channels

• 8-bit timer (D/A converter) Note

: 1 channel

• Watchdog timer

: 1 channel

Note Used is shared with the 8/9-bit resolution × 3-channel D/A converter (PWM output).

Figure 5-2. Basic Timer Block Diagram

4.5 MHz

Divider

INTTMC

16

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