22.6.3.1 Initialization

Before a Brown-Out Detector (BODVDD) is enabled, it must be configured, as outlined by the following:
  • Set the BOD threshold level (BODVDD.LEVEL)
  • Set the configuration in Active, Standby (BODVDD.ACTION, BODVDD.STDBYCFG)
  • Set the prescaling value if the BOD will run in sampling mode (BODVDD.PSEL)
  • Set the action and hysteresis (BODVDD.ACTION and BODVDD.HYST)

The BODVDD register is Enable-Protected, meaning that they can only be written when the BOD is disabled (BODVDD.ENABLE=0 and STATUS.BVDDSRDY=0). As long as the Enable bit is '1', any writes to Enable-Protected registers will be discarded, and an APB error will be generated. The Enable bits are not Enable-Protected.