h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 451

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

• WDT1 Mode Select
Bit 5—Timer Enable (TME): Selects whether TCNT runs or is halted.
WDT0 TCSR Bit 4—Reserved Bit: It is always read as 1 and cannot be modified.
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.
TCSR1
WT/IT IT IT IT
0
1
Bit 5
TME
0
1
Bit 4
PSS
0
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
Description
The TCNT counts frequency-division clock pulses of the φ based
prescaler (PSM).
The TCNT counts frequency-division clock pulses of the φ SUB-based prescaler
(PSS).
Rev. 5.00 Sep 22, 2005 page 425 of 1136
Section 12 Watchdog Timer
REJ09B0257-0500
(Initial value)
(Initial value)
(Initial value)