HD64F2357VF13 Datasheet, PDF (494/1049 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Reset input
Reset signal to entire system
H8S/2357 Group
RES
WDTOVF^*
Note: * The WDTOVF pin function is not available in the F-ZTAT version,
the H8S/2398, H8S/2394, H8S/2392 or H8S/2390.
Figure 13-9 Circuit for System Reset by WDTOVF Signal (Example)
13.5.5 Internal Reset in Watchdog Timer Mode
The H8S/2357 Group is not reset internally if TCNT overflows while the RSTE bit is cleared to 0 during watchdog timer
operation, but TCNT and TSCR of the WDT are reset.
TCNT, TCSR, and RSTCR cannot be written to while the WDTOVF signal* is low. Also note that a read of the WOVF
flag is not recognized during this period. To clear the WOVF falg, therefore, read RSTCSR after the WDTOVF signal*
goes high, then write 0 to the WOVF flag.
Note: * The WDTOVF pin function is not available in the F-ZTAT version, the H8S/2398, H8S/2394, H8S/2392 or
H8S/2390.
Rev.6.00 Oct.28.2004 page 464 of 1016
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