ATMEGA168A View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA168A

8-bit Atmel Microcontroller with 4/8/16/32K Bytes In-System Programmable Flash

Atmel Corporation 

ATmega48A/PA/88A/PA/168A/PA/328/P

1.1.7

1.1.8

1.1.9

The various special features of Port D are elaborated in ”Alternate Functions of Port D” on page

90.

AVCC

AREF

AVCC is the supply voltage pin for the A/D Converter, PC3:0, and ADC7:6. It should be externally

connected to VCC, even if the ADC is not used. If the ADC is used, it should be connected to VCC

through a low-pass filter. Note that PC6...4 use digital supply voltage, VCC.

AREF is the analog reference pin for the A/D Converter.

ADC7:6 (TQFP and QFN/MLF Package Only)

In the TQFP and QFN/MLF package, ADC7:6 serve as analog inputs to the A/D converter.

These pins are powered from the analog supply and serve as 10-bit ADC channels.

4

8271DS–AVR–05/11

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