h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 482

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 12 Watchdog Timer
WDT0 Mode Select
Note: * For details see section 12.2.3, Reset Control/Status Register (RSTCSR).
WDT1 Mode Select
Bit 5—Timer Enable (TME): Selects whether TCNT runs or is halted.
WDT0 TCSR Bit 4—Reserved Bit: A read operation on this bit always causes a 1 to be read out.
Every write operation on this bit is invalidated.
WDT1 TCSR Bit 4—Prescaler Select (PSS): This bit is used to select an input clock source for
the TCNT of WDT1.
See the descriptions of Clock Select 2 to 0 for details.
Rev. 6.00 Feb 22, 2005 page 422 of 1484
REJ09B0103-0600
TCSR0
WT/
0
1
TCSR1
WT/
0
1
Bit 5
TME
0
1
I T
I T
Description
Interval timer mode: WDT0 requests an interval timer interrupt (WOVI)
from the CPU when the TCNT overflows
Watchdog timer mode: A reset is issued when the TCNT overflows if the RSTE bit of
RSTCSR is set to 1 *
Description
Interval timer mode: WDT1 requests an interval timer interrupt (WOVI)
from the CPU when the TCNT overflows
Watchdog timer mode: WDT1 requests a reset or an NMI interrupt from
the CPU when the TCNT overflows
Description
TCNT is initialized to H'00 and halted
TCNT counts
(Initial value)
(Initial value)
(Initial value)