HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 531

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

This LSI includes the watchdog timer (WDT).
This LSI can be reset by the overflow of the counter when the value of the counter has not been
updated because of a system runaway.
The WDT is a single-channel timer that uses a peripheral clock as an input and counts the clock
settling time when clearing software 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 software standby mode
• Can switch between watchdog timer mode and interval timer mode.
• Generates internal resets in watchdog timer mode: Internal resets occur after counter overflow.
• An interrupt is generated in interval timer mode
• Choice of eight counter input clocks
• Choice of two resets
WDTS300B_000020030200
and the 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 chosen.
Power-on reset and manual reset are available.
Features
Section 12 Watchdog Timer (WDT)
Rev. 3.00 Jan. 18, 2008 Page 469 of 1458
Section 12 Watchdog Timer (WDT)
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