ATMEGA328P-20AU datasheet(4/420 Pages) ATMEL

Part #	ATMEGA328P-20AU

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

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Manufacturer	ATMEL [ATMEL Corporation]

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4

8025M–AVR–6/11

ATmega48P/88P/168P

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

86.

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.

2.

Overview

The ATmega48P/88P/168P is a low-power CMOS 8-bit microcontroller based on the AVR

enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the

ATmega48P/88P/168P achieves throughputs approaching 1 MIPS per MHz allowing the system

designer to optimize power consumption versus processing speed.

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