
The Mega 2560 microcontroller board offers 54 digital I/O pins, 16 analog inputs, USB connectivity, and compatibility with numerous shields. Ideal for advanced projects.
External input voltage pin on the Arduino Mega 2560 Rev3 power header.
Regulated 5V rail on the board power header.
Regulated 3.3V rail on the board power header.
Ground pins on the board power/header connectors.
Reset line exposed on the board header.
UART · I2C · Analog · Input supply to onboard regulator; Arduino docs recommend 7-12V board input. · 5V
Confirm the data interface matches your host board.
Module pins: VIN, +5V, +3V3, GND, D20 / SDA, D21 / SCL, A0-A15 / D54-D69, ICSP MOSI / MISO / SCK. Schematik maps them to your board in the app.
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Digital pin 0, UART0 receive.
Digital pin 1, UART0 transmit.
Digital GPIO header pins; D2-D13 include interrupt/PWM/SPI-adjacent functions as labelled in the official full pinout.
Additional digital pins used for UART3, UART2, and UART1 serial interfaces.
I2C data line, also digital pin 20.
I2C clock line, also digital pin 21.
Extended Arduino Mega digital GPIO header pins.
Sixteen analogue input pins, also usable as digital pins D54-D69.
Analogue reference input for ADC measurements.
SPI signals exposed on the ICSP header.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| VIN | power | External input voltage pin on the Arduino Mega 2560 Rev3 power header. | Input supply to onboard regulator; Arduino docs recommend 7-12V board input. | |
| +5V | power | Regulated 5V rail on the board power header. | 5V | |
| +3V3 | power | Regulated 3.3V rail on the board power header. | 3.3V | |
| GND | ground | Ground pins on the board power/header connectors. | 0V reference | |
| RESET | control | Reset line exposed on the board header. | 5V logic domain | |
| D0 / RX0 | D0 | digital | Digital pin 0, UART0 receive. | 5V logic |
| D1 / TX0 | D1 | digital | Digital pin 1, UART0 transmit. | 5V logic |
| D2-D13 | D2-D13 | digital | Digital GPIO header pins; D2-D13 include interrupt/PWM/SPI-adjacent functions as labelled in the official full pinout. | 5V logic |
| D14-D19 / TX3 RX3 TX2 RX2 TX1 RX1 | D14-D19 | digital | Additional digital pins used for UART3, UART2, and UART1 serial interfaces. | 5V logic |
| D20 / SDA | D20 | i2c | I2C data line, also digital pin 20. | 5V logic |
| D21 / SCL | D21 | i2c | I2C clock line, also digital pin 21. | 5V logic |
| D22-D53 | D22-D53 | digital | Extended Arduino Mega digital GPIO header pins. | 5V logic |
| A0-A15 / D54-D69 | A0-A15 | analog | Sixteen analogue input pins, also usable as digital pins D54-D69. | Analogue input range tied to board reference, normally 0-5V unless AREF is used. |
| AREF | AREF | analog reference | Analogue reference input for ADC measurements. | Reference input for analogue converter; use per Arduino analogue reference guidance. |
| ICSP MOSI / MISO / SCK | ICSP | spi | SPI signals exposed on the ICSP header. | 5V logic |