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