UPD78F9418A NEC, UPD78F9418A Datasheet - Page 133

• Manufacturer Part Number: UPD78F9418A
• Description: (UPD7894xxA) 8-Bit Single Chip Microcontrollers
• Manufacturer: NEC

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Remark
Count clock
f
Interval timer
interrupt
INTWTI
Watch timer
interrupt
INTWT
W
/2
f
The parenthesized values apply to operation at f
9
W
: Watch timer clock frequency
5-bit counter
Figure 8-3. Watch Timer/Interval Timer Operation Timing
0H
Start
Watch timer interrupt time (0.5 s)
Interval
timer (T)
CHAPTER 8 WATCH TIMER
User’s Manual U13952EJ3V0UD
Overflow
W
= 32.768 kHz.
Watch timer interrupt time (0.5 s)
T
Overflow
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