ATmega328 Datasheet – 8-bit AVR RISC-based Microcontroller

Part Number: ATmega328

Function: 8-bit AVR RISC-based Microcontroller

Package: 28-pin PDIP, 32-lead TQFP, 28-pad QFN/MLF and 32-pad QFN/MLF

Manufactuerers : ATMEL -> Microchip

Image and pinout
ATmega328 Pinout Datasheet


The ATmega48A/PA/88A/PA/168A/PA/328/P 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 ATmega48A/PA/88A/PA/168A/PA/328/P achieves throughputs approaching 1 MIPS per MHz allowing the
system designer to optimize power consumption versus processing speed.

The high-performance Atmel picoPower 8-bit AVR RISC-based microcontroller combines 32KB ISP flash memory with read-while-write capabilities, 1024B EEPROM, 2KB SRAM, 23 general purpose I/O lines, 32 general purpose working registers, three flexible timer/counters with compare modes, internal and external interrupts, serial programmable USART, a byte-oriented 2-wire serial interface, SPI serial port, a 6-channel 10-bit A/D converter (8-channels in TQFP and QFN/MLF packages), programmable watchdog timer with internal oscillator, and five software selectable power saving modes. The device operates between 1.8-5.5 volts.

Block Diagram

ATmega328 Datasheet Block diagram

Memory Size

ATmega328 PDF Memory Size

Reference Site: [ Arduino to AVR-C on the ATmega328p ]

Official Homepage:

ATmega328 Datasheet PDF