Datasheet
Table 27-1. Analog Comparator Multiplexed Input
ACME ADEN MUX[2:0] Analog Comparator Negative Input
0 x xxx AIN1
1 1 xxx AIN1
1 0 000 ADC0
1 0 001 ADC1
1 0 010 ADC2
1 0 011 ADC3
1 0 100 ADC4
1 0 101 ADC5
1 0 110 ADC6
1 0 111 ADC7
27.3 Register Description
ATmega48PA/88PA/168PA
Analog Comparator (AC)
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Datasheet Complete
DS40002011A-page 310