UPD75216ACW NEC, UPD75216ACW Datasheet - Page 19

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UPD75216ACW

Manufacturer Part Number
UPD75216ACW
Description
4-BIT SINGLE-CHIP MICROCOMPUTER
Manufacturer
NEC
Datasheet
5.3
BASIC INTERVAL TIMER
The basic interval timer has the following functions:
Interval timer operation to generate reference time
Watchdog timer application to detect inadvertent program loop
Wait time select and count upon standby mode release
Count contents read
Fig. 5-2 Basic Interval Timer Configuration
From Clock
Generator
5
f
/2
XX
7
f
/2
XX
MPX
9
f
/2
XX
12
f
/2
XX
3
BTM3
BTM2
BTM1
BTM0 BTM
SET1*
4
* Instruction execution
Clear
Basic Interval Timer
(8-Bit Frequency Divider)
BT
Wait Release
Signal During
Standby Release
8
Internal Bus
PD75216A
Clear
Set
BT Interrupt
Request Flag
Vectored
Interrupt
Request
IRQBT
Signal
19

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