8.1 Power Domain Overview

The SAM R30 power domains operate independently of each other:
  • VDDCORE, VDDIO and VDDIN share GND, whereas VDDANA refers to GNDANA.
  • VDDANA and VDDIN must share the main supply, VDD.
  • VDDCORE serves as the internal voltage regulator output. It powers the core, memories, peripherals, DFLL48M and FDPLL96M.
  • VSWOUT and VDDBU are internal power domains.
  • On SAM L21E, VDDIO is electrically connected to the VDDANA domain and supplied through VDDANA.