Datasheet

Section 15 Watchdog Timer
(WDT1 is not available in the H8S/2695)
R01UH0166EJ0600 Rev. 6.00 Page 723 of 1434
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
15.5.6 OVF Flag Clearing in Interval Timer Mode
When the OVF Flag setting conflicts with the OVF flag reading in interval timer mode, writing 0
to the OVF bit may not clear the flag even though the OVF bit has been read while it is 1. If there
is a possibility that the OVF flag setting and reading will conflict, such as when the OVF flag is
polled with the interval timer interrupt disabled, read the OVF bit while it is 1 at least twice before
writing 0 to the OVF bit to clear the flag.