Power-On Reset and Brown-Out Detectors

The SAM L10/L11 embed three features to monitor, warn and reset the device:

A Power-on Reset (POR) on V_DD (VDDANA and VDDIO):
- Monitoring is always activated, including during device startup or during any sleep modes.
- Having V_DD below a fixed threshold voltage will reset the whole device.
Note: Refer to Power-On Reset (POR) Characteristics for the rising and falling threshold voltages.
A Brown-out Detector (BOD33) on V_DD (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.