Technical Documents

ATmega2560 microcontroller

EMX-00003-A

Name: Arduino Mega
Brand: Generic
SKU: EMX-00003-A
Availability: InStock

(Last updated) May 18, 2026

Arduino Mega

Description

The Arduino Mega is a microcontroller board based on the ATmega2560. It has 54 digital input/output pins (of which 14 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started. The Mega is compatible with most shields designed for the Arduino Duemilanove or Diecimila. The Mega 2560 R3 also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided by the board. The other is not connected and is reserved for future purposes. The Mega 2560 R3 works with all existing shields but can adapt to new shields that use these additional pins. Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The open-source IDE can be downloaded for free (currently for Mac OS X, Windows, and Linux).

Manufacturer Details

Manufacturer	Part Number
Arduino	A000067
Elegoo	EL-MEGA2560
RobotDyn	RD-MEGA2560
Keyestudio	KS0499
DFRobot	DFR0198
Waveshare	WS-MEGA2560

Vendor Suppliers

Amazon ( india ) Amazon ( Japan ) Amazon ( USA ) Amazon ( canada ) Robu.in ( India ) FlyRobo ( India )

Application Resources

A000067-full-pinout Arduino Mega 2560 Arduino Mega 2560

Technical Specifications

Microcontroller Chip	ATmega2560
Analog I/O Pins	16
Digital I/O Pins	54 (of which 14 provide PWM output)
Flash Memory	256 KB of which 8 KB used by bootloader
SRAM	8 KB
EEPROM	4 KB
DC Current per I/O Pin	40 mA
DC Current for 3.3V Pin	DC Current for 3.3V Pin
Operating Voltage	5V
Input Voltage	7V to 12V
Input Voltage (limit)	6V-20V