HD6432345 Datasheet, PDF (420/907 Pages) Hitachi Semiconductor – H8S/2345 F-ZTAT Hardware Manual

TCNT count
H'FF
Overflow
H'00
WT/IT = 1 H'00 written
TME = 1 to TCNT
WDTOVF signal^*3
Internal reset signal^*1
Legend
WT/IT : Timer mode select bit
TME : Timer enable bit
WOVF=1
WDTOVF ^*3 and
internal reset are
generated
Time
WT/IT = 1 H'00 written
TME = 1 to TCNT
132 states^*2
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 is not supported by the F-ZTAT version.
Figure 11.4 Watchdog Timer Operation
405