D12320VF25IV Datasheet, PDF (622/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 13 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 pin function cannot be used in the F-ZTAT versions.
Figure 13.4 Operation in Watchdog Timer Mode
Rev.6.00 Sep. 27, 2007 Page 590 of 1268
REJ09B0220-0600