5.1 Power Domains
The AVR DU Family devices have several power domains with the
following power supply pins:
| VDD |
Powers I/O lines, XOSCHF and the internal voltage regulator |
| VUSB | Powers the USB peripheral’s internal transceiver (connected to pins DM and DP) |
The ground pins, GND, are mutual to VDD and VUSB.
For recommendations on layout and decoupling, refer to the Hardware Guidelines section.