HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 239

• Manufacturer Part Number: HD6417618
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

This LSI includes the watchdog timer (WDT) that can reset this LSI 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 leaving software standby mode and temporary standby state, such as frequency
changes. It can also be used as an interval timer.
9.1
The WDT has the following features:
• Can be used to ensure the clock settling time.
• Can switch between watchdog timer mode and interval timer mode.
• Internal resets in watchdog timer mode
• Interrupts are generated in interval timer mode
• Choice of eight counter input clocks
WDTS300B_000020030900
The WDT can be used when leaving software standby mode and the temporary standby state
which occur when the clock frequency is changed.
Internal resets are generated when the counter overflows.
Interval timer interrupts are generated when the counter overflows.
Eight clocks (×1 to ×1/4096) that are obtained by dividing the peripheral clock can be chosen.
Features
Section 9 Watchdog Timer (WDT)
Rev. 6.00 Jun. 12, 2007 Page 207 of 610
Section 9 Watchdog Timer (WDT)
REJ09B0131-0600