h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 493

• Manufacturer Part Number: h8s-2635
• 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
φ
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. 6.00 Feb 22, 2005 page 433 of 1484
state of a TCNT write cycle, the write
2
Counter write data
Section 12 Watchdog Timer
M
REJ09B0103-0600