The device has four sources of reset:
- Power-on Reset. The MCU is reset when
the supply voltage is less than the Power-on Reset threshold (VPOT).
- VLM (VCC Level Monitoring) Reset. The MCU is reset when voltage on the
VCC pin is below the selected trigger level.
- External Reset. The MCU is reset when a
low level is present on the RESET pin for longer than the
minimum pulse length.
- Watchdog System Reset. The MCU is reset when the Watchdog Timer period expires and the Watchdog System Reset mode is enabled.