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The voltage on VDDIO should be greater than VDD or no less than 0.3 V below VDD at all times. VDDIO,VDD3VFL, VDDOSC, and VDDA should be powered up together and be kept within 0.3 V of each other during operation. Before powering the device, no voltage larger than 0.3 V above VDDIO should be applied to any digital pin, and no voltage larger than 0.3 V above VDDA should be applied to any analog pin.
