D12320VF25V Datasheet, PDF (458/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 11 Watchdog Timer
TCNT count
H'FF
Overflow
H'00
WT/IT=1
TME=1
H'00 written
to TCNT
WDTOVF signal^*3
Internal reset signal^*1
WOVF=1
WDTOVF^*3 and
internal reset are
generated
Time
WT/IT=1 H'00 written
TME=1 to TCNT
132 states^*2
Legend:
WT/IT: Timer mode select bit
TME: Timer enable bit
518 states
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.
Figure 11.4 Operation in Watchdog Timer Mode
Rev.7.00 Feb. 14, 2007 page 424 of 1108
REJ09B0089-0700