HD64F2168 Datasheet, PDF (390/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

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.
Reset input
Reset signal for entire system
This LSI
RES
RESO
Figure 13.8 Sample Circuit for Resetting the System by the RESO Signal
Rev. 3.00, 03/04, page 350 of 830