7.2.6.1 Supply Order

The VDDIO and AVDD must have the same supply sequence. Ideally, they must be connected together outside of this device. VDDREG is independent from other supply voltages but must be equal or lower than VDDIO/VDDA.

Note: The VDDIO supplies the XOSCn, therefore the VDDIO must be present before the application uses the XOSC feature. This is also applicable to all digital features present on pins supplied by VDDIO. VDDREG can be used as a low voltage input to the main regulators such that 1.8v < VDDREG < AVDD.

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