The AVDD voltage must ramp up closely with the VDD voltage during power-up to ensure proper operation.

If the device is configured in single-supply mode, the VDDIO2 voltage must also rise closely to VDD. In Dual-supply mode, the VDDIO2 voltage can ramp up or down at any time without affecting the proper operation. Refer to the Multi-Voltage I/O (MVIO) section for further information.

The Power-on Reset (POR) and the Brown-out Detector (BOD) monitors VDD and will keep the system in reset if the voltage level is below the respective voltage thresholds. Refer to the Reset Controller (RSTCTRL) and Brown-out Detector (BOD) sections for further information.

Refer to the Electrical Characteristics section for further information on voltage thresholds.