HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 611
HD6412320
Manufacturer Part Number
HD6412320
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412320.pdf
(1302 pages)
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13.1
The chip has a single-channel on-chip watchdog timer (WDT) for monitoring system operation.
The WDT outputs an overflow signal (WDTOVF) * if a system crash prevents the CPU from
writing to the timer counter, allowing it to overflow. At the same time, the WDT can also generate
an internal reset signal for the chip.
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.
13.1.1
WDT features are listed below.
• Switchable between watchdog timer mode and interval timer mode
• WDTOVF output when in watchdog timer mode *
• Interrupt generation when in interval timer mode
• Choice of eight counter clock sources
Note: * The WDTOVF pin function cannot be used in the F-ZTAT versions.
If the counter overflows, the WDT outputs WDTOVF * . It is possible to select whether or not
the entire chip is reset at the same time
If the counter overflows, the WDT generates an interval timer interrupt
Overview
Features
Section 13 Watchdog Timer
Rev.6.00 Sep. 27, 2007 Page 581 of 1268
Section 13 Watchdog Timer
REJ09B0220-0600
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