HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 385

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

This LSI includes the watchdog timer (WDT), which enables reset on overflow of the counter
when the value of the counter has not been updated because of a system malfunction.
The watchdog timer (WDT) is a single-channel timer that uses a peripheral clock as an input and
counts the clock settling time and is used to clear standby mode and temporary standbys, such as
frequency changes. It can also be used as an interval timer.
12.1
The WDT has the following features:
• Can be used to ensure the clock settling time: Use the WDT to cancel a standby mode and the
• Can switch between watchdog timer mode and interval timer mode.
• Generates internal resets in watchdog timer mode: Internal resets occur after counter overflow.
• Interrupt generation in interval timer mode
• Choice of eight counter input clocks
• Power-on reset or manual reset can be selected as a reset
Figure 12.1 shows a block diagram of the WDT.
WDTS301A_000020030200
temporary standbys which occur when the clock frequency is changed.
An interval timer interrupt is generated when the counter overflows.
Eight clocks (×1 to ×1/4096) that are obtained by dividing the peripheral clock can be selected.
Features
Section 12 Watchdog Timer (WDT)
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