UPD75048CW 查看數據表（PDF） - NEC => Renesas Technology

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UPD75048CW

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75048

6.4 BASIC INTERVAL TIMER

The basic interval timer has these functions:

• Interval timer operation which generates a reference time interrupt

• Watchdog timer application which detects a program runaway

• Selects the wait time for releasing the standby mode and counts the wait time

• Reads out the count value

From the

clock generator

fX/25

fX/27

fX/29

fX/212

MPX

Clear

Clear

Basic interval timer

(8-bit frequency divider circuit)

BT

Set

signal

BT

interrupt

request flag

Vector

interrupt

request

IRQBT signal

3

BTM3 BTM2 BTM1 BTM0 BTM

*SET1

4

8

Internal bus

Wait release signal

for standby release

Remarks : *: Instruction execution

Fig. 6-3 Basic Interval Timer Configuration

25

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