H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 569

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Bit 7—Overflow Flag (OVF): Indicates that TCNT has overflowed from H'FF to H'00, when in
interval timer mode. This flag cannot be set during watchdog timer operation.
Bit 6—Timer Mode Select (WT/IT IT IT IT): Selects whether the WDT is used as a watchdog timer or
interval timer. If used as an interval timer, the WDT generates an interval timer interrupt request
(WOVI) when TCNT overflows. If used as a watchdog timer, the WDT generates the WDTOVF
signal when TCNT overflows.
Note:
Bit 5—Timer Enable (TME): Selects whether TCNT runs or is halted.
Bits 4 and 3—Reserved: Read-only bits, always read as 1.
Bit 7
OVF
0
1
Bit 6
WT/IT IT IT IT
0
1
Bit 5
TME
0
1
* For details of the case where TCNT overflows in watchdog timer mode, see section
12.2.3, Reset Control/Status Register (RSTCSR).
Description
[Clearing condition]
Cleared by reading TCSR when OVF = 1, then writing 0 to OVF
[Setting condition]
Set when TCNT overflows (changes from H'FF to H'00) in interval timer mode
Description
Interval timer: Sends the CPU an interval timer interrupt request (WOVI)
when TCNT overflows
Watchdog timer: Generates the WDTOVF signal when TCNT overflows
Description
TCNT is initialized to H'00 and halted
TCNT counts
Rev. 3.00 Sep 15, 2006 page 535 of 988
Section 12 Watchdog Timer (WDT)
REJ09B0330-0300
(Initial value)
(Initial value)
(Initial value)