12.3.2 Interval Timer Operation
Figure 12-5 illustrates interval timer operation. To use the WDT as an interval timer, clear bit
WT/
IT
to 0 and set bit TME to 1 in TCSR. An interval timer interrupt request is generated at each
TCNT overflow. This function can be used to generate interval timer interrupts at regular intervals.
Figure 12-5 Interval Timer Operation
TCNT
count value
Time t
Interval
timer
interrupt
Interval
timer
interrupt
Interval
timer
interrupt
Interval
timer
interrupt
WT/ = 0
TME = 1
IT
H'FF
H'00
432
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