Datasheet

Section 13 Watchdog Timer
Rev.6.00 Sep. 27, 2007 Page 590 of 1268
REJ09B0220-0600
TCNT count
H'00
Time
H'FF
WT/IT=1
TME=1
H'00 written
to TCNT
WT/IT=1
TME=1
H'00 written
to TCNT
132 states
*
2
518 states
WDTOVF signal
*
3
Internal reset signal
*
1
WT/IT:
TME:
Notes: 1. The internal reset signal is generated only if the RSTE bit is set to 1.
2. 130 states when the RSTE bit is cleared to 0.
3. The WDTOVF pin function cannot be used in the F-ZTAT versions.
Overflow
WDTOVF
*
3
and
internal reset are
generated
WOVF=1
Timer mode select bit
Timer enable bit
Legend:
Figure 13.4 Operation in Watchdog Timer Mode