7.2.1 Power Supplies

The SAM D5x/E5x has the following power supply pins:

  • VDDIO – Powers I/O lines, XOSCn and the internal regulator for VDDCORE. Voltage is 1.71V to 3.63V.
  • VDDIOB – Powers I/O B lines. Voltage is 1.71V to 3.63V.

  • VDDANA – Powers I/O lines, the Automatic Power Switch, ADC0/1, AC, DAC and PTC. Voltage is 1.71V to 3.63V.

  • VBAT – Powers the Automatic Power Switch. Voltage is 1.71V to 3.63V

  • VDDCORE – Serves as the internal voltage regulator output in linear mode, depending on the powering configuration. It powers the VSW core power domain and the VDDBU backup domain, memories, peripherals, DFLL48M, FDPLL200Mn, and RAMs. Voltage is 1.2V typical.

  • The Automatic Power Switch is a configurable switch that selects between VDD and VBAT as supply for the internal output VSWOUT, see the figure in Power Domain Overview.

The same voltage must be applied to both VDDIO and VDDANA. In this data sheet, this common voltage applied to both VDDIO and VDDANA, is represented as VDD.

VDDIOB voltage level must be equal or lower than VDDIO.

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

For decoupling recommendations for the different power supplies, refer to the schematic checklist.