Datasheet

Section 11 Watchdog Timer
Rev.7.00 Feb. 14, 2007 page 424 of 1108
REJ09B0089-0700
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 output function is not available in the F-ZTAT versions.
Overflow
WDTOVF
*3
and
internal reset are
generated
WOVF=1
Timer mode select bit
Timer enable bit
Legend:
Figure 11.4 Operation in Watchdog Timer Mode