r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 549

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

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 watchdog timer (WDT) is a single-channel timer that uses a peripheral clock as an input and
counts the clock settling time when revoking software standby mode. It can also be used as an
interval timer.
13.1
• Can be used to ensure the clock settling time: Use the WDT to revoke 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
Figure 13.1 shows a block diagram of the WDT.
WDTS300B_000020030200
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 13 Watchdog Timer (WDT)
Rev. 1.00 Sep. 21, 2007 Page 523 of 1124
Section 13 Watchdog Timer (WDT)
REJ09B0402-0100