Datasheet

Section 17 Subsystem Timer (Subtimer)
Rev. 4.00 Mar. 15, 2006 Page 390 of 556
REJ09B0026-0400
17.5 Usage Notes
17.5.1 Clock Supply to Watchdog Timer
When the on-chip oscillator for the subtimer is used to supply clocks to the watchdog timer, the
setting is necessary not only for the subtimer but also for the watchdog timer. For details, refer to
section 13, Watchdog Timer.
17.5.2 Writing to ROPCR
ROPCR must be written to in active mode with the PCEF bit in SBTCTL set to 1. Otherwise, the
subtimer may operate incorrectly.