H8S2245 datasheet(435/818 Pages) RENESAS

435 / 818 page

Section 11 Watchdog Timer

Rev.3.00 Mar. 26, 2007 Page 393 of 772

REJ09B0355-0300

Bit 7—Watchdog Timer Overflow Flag (WOVF): Indicates that TCNT has overflowed

(changed from H'FF to H'00) during watchdog timer operation. This bit is not set in interval timer

mode.

Bit 7

WOVF

Description

[Clearing condition]

(Initial value)

Cleared by reading RSTCSR when WOVF = 1, then writing 0 to WOVF

[Setting condition]

Set when TCNT overflows (changes from H'FF to H'00) during watchdog timer

operation

Bit 6—Reset Enable (RSTE): Specifies whether or not a reset signal is generated in the

H8S/2245 Group if TCNT overflows during watchdog timer operation.

Bit 6

RSTE

Description

Reset signal is not generated if TCNT overflows*

(Initial value)

Reset signal is generated if TCNT overflows

Note:

The modules within the H8S/2245 Group are not reset, but TCNT and TCSR within the

WDT are reset.

Bit 5—Reset Select (RSTS): Selects the type of internal reset generated if TCNT overflows

during watchdog timer operation.

For details of the types of resets, see section 4, Exception Handling.

Bit 5

RSTS

Description

Power-on reset

(Initial value)

Manual reset

Bits 4 to 0—Reserved: Read-only bits, always read as 1.

H8S2245 Datasheet(PDF) 435 Page - Renesas Technology Corp