typeVRefSelect
Analog reference voltage
Literals
| Name | Description |
|---|---|
| AREF | AREF used as VRef and internal VRef is turned off |
| AVCC | AVCC with external capacitor at the AREF pin is used as VRef (5V on Arduino) |
| Internal2 | This is a reserved setting in most AVRs. On ATmega1280, it is 1.1 internal reference voltage |
| Internal | Internal reference voltage (1.1V (ATmega168/328) or 2.56V on (ATmega8, ATmega1280)) |