19.4.3 Reset State Priorities

The reset state manager manages the priorities among the different reset sources. The resets are listed in order of priority as follows:

1. General reset
2. Backup reset
3. 32.768 kHz Crystal Failure Detection reset
4. Watchdog reset
5. Software reset
6. User reset

Specific cases are listed below:

• When in User reset:
  • A watchdog event is impossible because the WDT is being reset by the Processor reset signal.
  • A Software reset is impossible, since the Processor reset is being activated.
• When in Software reset:
  • A watchdog event has priority over the current state.
  • The NRST has no effect.
• When in Watchdog reset:
  • The Processor reset is active and so a Software reset cannot be programmed.
  • A User reset cannot be entered.