A Brown-out
Detector (BOD33) on VDD (VDDANA and VDDIO):
The BOD33 can monitor VDD
continuously (continuous mode) or periodically (sampled mode) with a
programmable sample frequency in active mode as in any sleep modes.
A programmable threshold
loaded from the NVM User Row is used to trigger an interrupt and/or
reset the whole device.
A Brown-out
Detector (BOD12) on VDDCORE.
Note: BOD12 is calibrated in
production and its calibration parameters are stored in the NVM User Row.
This data must not be changed to ensure correct device behavior.