HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 626

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 13 Watchdog Timer
13.5.5
Internal Reset in Watchdog Timer Mode
The chip is not reset internally if TCNT overflows while the RSTE bit is cleared to 0 during
watchdog timer operation, but TCNT and TCSR 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 flag, therefore,
read RSTCSR after the WDTOVF signal * goes high, then write 0 to the WOVF flag.
Note: * The WDTOVF pin function cannot be used in the F-ZTAT versions.
Rev.6.00 Sep. 27, 2007 Page 596 of 1268
REJ09B0220-0600