h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 461

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

12.4
During interval timer mode operation, an overflow generates an interval timer interrupt (WOVI).
The interval timer interrupt is requested whenever the OVF flag is set to 1 in TCSR. OVF must be
cleared to 0 in the interrupt handling routine.
If an NMI request has been chosen in the watchdog timer mode, an NMI request is generated
when a TCNT overflow occurs.
12.5
12.5.1
If a timer counter clock pulse is generated during the T
takes priority and the timer counter is not incremented. Figure 12.8 shows this operation.
Interrupts
Usage Notes
Contention between Timer Counter (TCNT) Write and Increment
Address
Internal write signal
TCNT input clock
TCNT
Figure 12.8 Contention between TCNT Write and Increment
TCNT write cycle
T
1
N
2
T
Rev. 5.00 Sep 22, 2005 page 435 of 1136
state of a TCNT write cycle, the write
2
Counter write data
Section 12 Watchdog Timer
M
REJ09B0257-0500