7.1 Power Domain Overview

Figure 7-1. Power Domain Block Diagram

The SAM D5x/E5x power domains are not independent of each other:

  • VDDCORE, VDDIO and VDDIOB share GND, whereas VDDANA uses GNDANA.
  • VDDANA and VDDIO must share the main supply, VDD.
  • VDDCORE pin is just an output for monitoring the internal voltage regulator. This is not an input for an external supply.
  • VSWOUT, VSW and VDDBU are internal power domains.
  • The VSW pin is for inductor connection to run the Main Voltage Regulator in switching mode.