D75208CW NEC, D75208CW Datasheet - Page 16

• Manufacturer Part Number: D75208CW
• Description: Search -----> UPD75208
• Manufacturer: NEC

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16
5.3
* Instruction execution
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
SET1*
BASIC INTERVAL TIMER
From Clock
Generator
f
f
f
f
XX
XX
XX
XX
BTM3
/2
/2
/2
/2
5
7
9
12
BTM2
4
BTM1
MPX
3
BTM0
Fig. 5-2 Basic Interval Timer Configuration
BTM
Internal Bus
(8-Bit Frequency Divider)
Basic Interval Timer
8
Clear
BT
Wait Release
Signal during
Standby Release
Set
BT Interrupt
Request Flag
IRQBT
Clear
PD75208
Vectored
Interrupt
Request
Signal