Section 13 Watchdog Timer (WDT)
Rev. 2.00 Mar 09, 2006 page 548 of 906
REJ09B0292-0200
of writing to RSTCSR differs from that of most other registers to prevent inadvertent rewriting.
See section 13.2.4, Notes on Register Access, for details. RSTCR is initialized to H'1D by input of
a reset signal from the
RES
pin, but is not initialized by the internal reset signal generated by
overflow of the WDT. It is initialized to H'1D in standby mode, when the clock frequency is
changed, and in clock pause mode.
Bit 7—Watchdog Timer Overflow Flag (WOVF): Indicates that WTCNT has overflowed (from
H'FF to H'00) in watchdog timer mode. It is not set in interval timer mode.
Bit 7: WOVF
Description
0
No WTCNT overflow in watchdog timer mode
(Initial value)
Cleared by reading WOVF, then writing 0 in WOVF
1
Set by WTCNT overflow in watchdog timer mode
Bit 6—Reset Enable (RSTE): Selects whether to reset the chip internally if WTCNT overflows in
watchdog timer mode.
Bit 6: RSTE
Description
0
Not reset when WTCNT overflows
(Initial value)
LSI not reset internally, but WTCNT and WTCSR reset within WDT
1
Reset when WTCNT overflows
Bit 5—Reset Select (RSTS): Selects the type of internal reset generated if WTCNT overflows in
watchdog timer mode.
Bit 5: RSTS
Description
0
Power-on reset
(Initial value)
1
Manual reset
Bits 4 to 2, bit 0—Reserved: These bits are always read as 1. The write value should always be 1.
Bit 1— Reserved: This bit is always read as 0. The write value should always be 0.
Summary of Contents for SH7616
Page 10: ...Rev 2 00 Mar 09 2006 page x of xxvi ...
Page 132: ...Section 2 CPU Rev 2 00 Mar 09 2006 page 106 of 906 REJ09B0292 0200 ...
Page 568: ...Section 12 16 Bit Free Running Timer FRT Rev 2 00 Mar 09 2006 page 542 of 906 REJ09B0292 0200 ...
Page 582: ...Section 13 Watchdog Timer WDT Rev 2 00 Mar 09 2006 page 556 of 906 REJ09B0292 0200 ...
Page 706: ...Section 16 Serial I O SIO Rev 2 00 Mar 09 2006 page 680 of 906 REJ09B0292 0200 ...
Page 820: ...Section 19 Pin Function Controller PFC Rev 2 00 Mar 09 2006 page 794 of 906 REJ09B0292 0200 ...
Page 932: ...Appendix D Package Dimensions Rev 2 00 Mar 09 2006 page 906 of 906 REJ09B0292 0200 ...
Page 935: ...SH7616 Hardware Manual ...