Datasheet

Rev. 3.00, 03/04, page 350 of 830
13.6.5 Switching between Watchdog Timer Mode and Interval Timer Mode
If the mode is switched from/to watchdog timer to/from interval timer, while the WDT is
operating, errors could occur in the operation. Software must stop the watchdog timer (by clearing
the TME bit to 0) before switching the mode.
13.6.6 System Reset by RESO Signal
Inputting the RESO output signal to the RES pin of this LSI prevents the LSI from being
initialized correctly; the RESO signal must not be logically connected to the RES pin of the LSI.
To reset the entire system by the RESO signal, use the circuit as shown in figure 13.8.
RES
RESO
This LSI
Reset input
Reset signal for entire system
Figure 13.8 Sample Circuit for Resetting the System by the RESO Signal