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.