3.11.2.3 AVCC Supply Voltage Regulator

The AVCC supply voltage regulator provides the supply voltage for the RF front end and XTO. It delivers high output current while maintaining tight control over voltage. The 220 nF external blocking capacitor ensures the stability of the internal AVCC voltage regulator circuit. Other values than 220 nF for this capacitor must not be used.

The AVCC supply voltage can be enabled and disabled by using the SUPCR.AVEN bit. This is done automatically by firmware when starting the XTO, the RXMode or the TXMode.