Reset Sources

The device has the following sources of reset:

• Power-on Reset. The MCU is reset when the supply voltage is less than the Power-on Reset threshold (V_POT).
• 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.
• Brown-out Reset. The MCU is reset when the supply voltage V_CC is less than the Brown-out Reset threshold (V_BOT) and the Brown-out Detector is enabled.

Figure 1. Reset Logic