ATMEGA48A_11 datasheet(4/35 Pages) ATMEL

Part #	ATMEGA48A

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

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8271DS–AVR–05/11

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

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

90.

1.1.7

AV

CC

AV

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

connected to V

CC, 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, V

CC.

1.1.8

AREF

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

1.1.9

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.

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