Power Supplies

The device has the following power supply pins:

• VDDIO: Powers I/O lines, OSC8M and XOSC. Voltage is 1.62V to 3.63V.
• VDDIN: Powers I/O lines and the internal regulator. Voltage is 1.62V to 3.63V.
• VDDANA: Powers I/O lines and the ADC, AC, DAC, PTC, OSCULP32K, OSC32K, XOSC32K. Voltage is 1.62V to 3.63V.
• VDDCORE: Internal regulated voltage output. Powers the core, memories, peripherals, and DFLL48M. Voltage is 1.2V.

The same voltage must be applied to both VDDIN, VDDIO and VDDANA. This common voltage is referred to as V_DD in the data sheet.

The ground pins, GND, are common to VDDCORE, VDDIO and VDDIN. The ground pin for VDDANA is GNDANA.

For decoupling recommendations for the different power supplies. Refer to Schematic Checklist for details.