RL78/G13 CHAPTER 10 WATCHDOG TIMER
R01UH0146EJ0100 Rev.1.00 468
Sep 22, 2011
CHAPTER 10 WATCHDOG TIMER
10.1 Functions of Watchdog Timer
The watchdog timer operates on the low-speed on-chip oscillator clock.
The watchdog timer is used to detect an inadvertent program loop. If a program loop is detected, an internal reset
signal is generated.
Program loop is detected in the following cases.
• If the watchdog timer counter overflows
• If a 1-bit manipulation instruction is executed on the watchdog timer enable register (WDTE)
• If data other than “ACH” is written to the WDTE register
• If data is written to the WDTE register during a window close period
When a reset occurs due to the watchdog timer, bit 4 (WDTRF) of the reset control flag register (RESF) is set to 1. For
details of the RESF register, see CHAPTER 19 RESET FUNCTION.
When 75% of the overflow time is reached, an interval interrupt can be generated.
To Next Page
Loading...
Need help?
General
