NEC V850ES/KE1+ User Manual page 345

Figure 10-3. Operation Timing of Watch Timer/Interval Timer
5-bit counter
Count clock
9
f or f /2
W W
Watch timer interrupt
INTWT
Interval timer interrupt
INTWTI
Remarks 1. Assuming that the interrupt time of the watch timer is set to 0.5 seconds.
2. f : Watch timer clock frequency
W
Values in parentheses apply when count clock f
n: Number of interval timer WT operations
CHAPTER 10 INTERVAL TIMER, WATCH TIMER
0H
Start
Interrupt time of watch timer (0.5 s) Interrupt time of watch timer (0.5 s)
Interval time (T)
nT
User's Manual U16896EJ2V0UD
Overflow
Interval time (T)
nT
= 32.768 kHz.
W
Overflow
345