Arduino Mega 2560 Rev3
ATmega2560-based board with 54 digital I/O pins (15 PWM), 16 analog inputs, 4 hardware UARTs, 16 MHz, and USB-B. A large I/O count makes it suitable for projects that exhaust Uno pins. Discontinued — the Adafruit Grand Central M4 is a current alternative.
Pinout
Pins 1–40
Pins 41–80
Pins 81–82
4 grouped source records are expanded into separate logical pads where unambiguous; physical placement is not implied.
- VIN
External input supply rail for the Arduino Mega 2560 board, from the official Arduino Mega 2560 documentation/pinout.
Type · PowerVoltage · board external input rail, see official Arduino Mega 2560 documentation - 5V
Regulated 5V board rail exposed on the Mega 2560 headers.
Type · PowerVoltage · 5V - 3V3
3.3V board rail exposed on the Mega 2560 headers.
Type · PowerVoltage · 3.3V - GND
Ground reference pins exposed on the Mega 2560 headers.
Type · GroundVoltage · 0V - RESET
Reset input exposed on the board headers.
Type · Control - D0-D53
Digital I/O header pins for the Arduino Mega 2560 board; the official pinout groups these pins and marks their alternate functions.
Type · GPIOVoltage · 5V logic board family - A0-A15
Analogue input header pins for the Arduino Mega 2560 board.
Type · AnalogVoltage · analogue input range follows board reference, see Arduino documentation - SDASCL
I2C/TWI interface pins exposed on the Mega 2560 headers.
Type · I2CVoltage · 5V logic board family - MOSIMISOSCK
SPI signals exposed via the ICSP header and alternate digital pins on the Mega 2560.
Type · SPIVoltage · 5V logic board family - TX0RX0, TX1RX1, TX2RX2, TX3RX3
Hardware serial UART transmit/receive pairs exposed on the Mega 2560 headers.
Type · UARTVoltage · 5V logic board family - AREF
Analogue reference pin exposed on the board header.
Type · Analog
| Pin | Type | Function | Voltage |
|---|---|---|---|
| VIN | Power | External input supply rail for the Arduino Mega 2560 board, from the official Arduino Mega 2560 documentation/pinout. | board external input rail, see official Arduino Mega 2560 documentation |
| 5V | Power | Regulated 5V board rail exposed on the Mega 2560 headers. | 5V |
| 3V3 | Power | 3.3V board rail exposed on the Mega 2560 headers. | 3.3V |
| GND | Ground | Ground reference pins exposed on the Mega 2560 headers. | 0V |
| RESET | Control | Reset input exposed on the board headers. | |
| D0-D53 | GPIO | Digital I/O header pins for the Arduino Mega 2560 board; the official pinout groups these pins and marks their alternate functions. | 5V logic board family |
| A0-A15 | Analog | Analogue input header pins for the Arduino Mega 2560 board. | analogue input range follows board reference, see Arduino documentation |
| SDASCL | I2C | I2C/TWI interface pins exposed on the Mega 2560 headers. | 5V logic board family |
| MOSIMISOSCK | SPI | SPI signals exposed via the ICSP header and alternate digital pins on the Mega 2560. | 5V logic board family |
| TX0RX0, TX1RX1, TX2RX2, TX3RX3 | UART | Hardware serial UART transmit/receive pairs exposed on the Mega 2560 headers. | 5V logic board family |
| AREF | Analog | Analogue reference pin exposed on the board header. |
Logical bank 1
Logical bank 2
Logical bank 3
4 grouped source records are expanded into separate logical pads where unambiguous; physical placement is not implied.
Pin details
11 connections- VIN
External input supply rail for the Arduino Mega 2560 board, from the official Arduino Mega 2560 documentation/pinout.
PowerVoltage · board external input rail, see official Arduino Mega 2560 documentation - 5V
Regulated 5V board rail exposed on the Mega 2560 headers.
PowerVoltage · 5V - 3V3
3.3V board rail exposed on the Mega 2560 headers.
PowerVoltage · 3.3V - GND
Ground reference pins exposed on the Mega 2560 headers.
GroundVoltage · 0V - RESET
Reset input exposed on the board headers.
Control - D0-D53
Digital I/O header pins for the Arduino Mega 2560 board; the official pinout groups these pins and marks their alternate functions.
GPIOVoltage · 5V logic board family - A0-A15
Analogue input header pins for the Arduino Mega 2560 board.
AnalogVoltage · analogue input range follows board reference, see Arduino documentation - SDASCL
I2C/TWI interface pins exposed on the Mega 2560 headers.
I2CVoltage · 5V logic board family - MOSIMISOSCK
SPI signals exposed via the ICSP header and alternate digital pins on the Mega 2560.
SPIVoltage · 5V logic board family - TX0RX0, TX1RX1, TX2RX2, TX3RX3
Hardware serial UART transmit/receive pairs exposed on the Mega 2560 headers.
UARTVoltage · 5V logic board family - AREF
Analogue reference pin exposed on the board header.
Analog
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