ATmega328P Datasheet – 8-bit AVR Microcontroller

This post explains for the AVR Microcontroller ATmega328P.

Part number : ATmega328P

Functions : 8-bit AVR RISC-based Microcontroller

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

Manufactuerers : Microchip,  ATMEL


ATmega328P Microcontroller


The ATmega48A / ATmegaPA / ATmega88A / ATmegaPA / ATmega168A / ATmegaPA / ATmega328 / ATmega328P 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.


ATmega328P Pinout

ATmega328P Pinout Datasheet PDF

ATmega328P Features

1. Advanced RISC architecture
(1) 131 powerful instructions – most single clock cycle execution
(2) 32 x 8 general purpose working registers
(3) Fully static operation
(4) Up to 16MIPS throughput at 16MHz
(5) On-chip 2-cycle multiplier

Memory Size

ATmega328P PDF Memory Size

2.  High endurance non-volatile memory segments
(1) 32K bytes of in-system self-programmable flash program memory
(2) 1Kbytes EEPROM
(3) 2Kbytes internal SRAM

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

ATmega328P Datasheet

Official Homepage :