6.3 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 VDD (VDDANA and VDDIO):
- Monitoring is always activated, including during device startup or during any sleep modes.
- Having VDD below a fixed threshold voltage will reset the whole device.
Note: Refer to 46.11.2 Power-On Reset (POR) Characteristics for the rising and falling threshold voltages. - 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.