Datasheet

463
H'FF
H'00
Overflow
WT/IT = 1
TME = 1
H'00 written
in TCNT
Internal
reset signal
*
WDTOVF
signal
TCNT
value
WDTOVF and
internal reset generated
WOVF = 1 WT/IT = 1
TME = 1
WT/IT:
TME:
Timer mode select bit
Timer enable bit
H'00 written
in TCNT
Time
512 φ clocks
128 φ clocks
Note: * Internal reset signal occurs only when the RSTE bit is set to 1.
Figure 13.4 Operation in the Watchdog Timer Mode