13.2.2 Brownout Detector on VDDCORE
The Brown-out-Detector(BOD) monitors VDDCORE. It is active by default. It can be deactivated by software through the Supply Controller (SUPC_MR). It is especially recommended to disable it during low-power modes, such as wait or sleep modes.
If VDDCORE goes below the threshold voltage, the reset of the core is asserted. For more information, refer to 23 Supply Controller (SUPC) and 57 Electrical Characteristics for SAM V70/V71.