3.2.2 ADC Reference Selection

The reference selection for the ATmega328PB ADC is shown in the table below. It can be configured in the ADMUX register.

Table 3-2. Input Channel Selection
MUX[3:0]	Single ended input
0	ADC0
1	ADC1
10	ADC2
11	ADC3
100	ADC4
101	ADC5
110	ADC6
111	ADC7
1000	Temperature sensor
1001	Reserved
1010	Reserved
1011	Reserved
1100	Reserved
1101	Reserved
1110	1.1V (VBG)
1111	0V (GND)

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