h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 335

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

The watchdog timer (WDT) is an 8-bit timer that can generate an internal reset signal for this LSI,
if a system crash prevents the CPU from writing to the timer counter, thus allowing it to overflow.
When this watchdog function is not needed, the WDT can be used as an interval timer. In interval
timer operation, an interval timer interrupt is generated each time the counter overflows.
The block diagram of the WDT is shown in figure 13.1.
13.1
In watchdog timer mode
In interval timer mode
WDT0100A_000020020300
Selectable from eight counter input clocks.
Switchable between watchdog timer mode and interval timer mode
If the counter overflows, it is possible to select whether this LSI is internally reset or not.
If the counter overflows, the WDT generates an interval timer interrupt (WOVI).
Features
Section 13 Watchdog Timer
Rev. 3.00 Oct 04, 2005 page 295 of 598
Section 13 Watchdog Timer
REJ09B0155-0300