Datasheet

10
2549PS–AVR–10/2012
ATmega640/1280/1281/2560/2561
2.3.17 AVCC
AVCC is the supply voltage pin for Port F and the A/D Converter. It should be externally con-
nected to V
CC
, even if the ADC is not used. If the ADC is used, it should be connected to V
CC
through a low-pass filter.
2.3.18 AREF
This is the analog reference pin for the A/D Converter.