A system-level reset is triggered by the following resets:
- Brownout
- Power-on
- CTRL-AP
- Watchdog
- Wakeup from System OFF
- Tamper detection
- Voltage glitch detection
- CPU Lockup
- Pin
The system reset sources are shown in the following figure.
After a reset, the device automatically starts up. The register RESETREAS can be read to determine which source generated the reset.