19.6.3.3.2 Leaving Battery Backup Mode

Leaving battery backup mode is triggered by the RSTC when a Backup Mode Exit condition occurs. See RSTC module for details.

• BOD33 exit condition: When the BOD33 detects Main Power is restored and BOD33.ACTION=BKUP:
  • When BBPS.WAKEEN=1, the device will leave backup mode and wake up.
  • When BBPS.WAKEEN=0, the backup domain will be powered by Main Power, but the device will stay in backup mode.
• For other exit condition (RTC): The device is kept in battery-powered backup mode until Main Power is restored to supply the device. Then, the backup domain will be powered by Main Power.