µPD75216A
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
Clear
Clear
f
f
f
f
XX/25
XX/27
Set
Basic Interval Timer
(8-Bit Frequency Divider)
BT Interrupt
Request Flag
MPX
XX/29
Vectored
Interrupt
Request
Signal
XX/212
BT
IRQBT
3
Wait Release
Signal During
Standby Release
BTM3
BTM2
BTM1
BTM0
BTM
SET1*
4
8
Internal Bus
*
Instruction execution
19
NEC [ NEC ]
