Arduino Mega 2560

The board as it appears on the Velxio canvas, with its full pin map read live from the simulator (regenerated by scripts/gen-boards.mjs, so it always matches what you can wire).

Family: Arduino & AVR · Languages: Arduino C++

About this board

The ATmega2560 at 16 MHz with 256 KB of flash — the pin-hungry member of the family, with 54 digital I/O against the UNO’s 14. That pin count, not the clock speed, is what usually decides a project onto a Mega.

The pin map below is the board’s own, all 85 entries, and it is one of only three in the catalog that carries signal names: the PWM-capable pins, the USART pins, the I2C pair on 20/21 and the SPI set on 50/51/52 are labelled from the board’s metadata rather than a table maintained here.

Start here

New Arduino Mega project opens the editor with this board and a working blink sketch.

Pins (85)

• SCLi2c
• SDAi2c
• AREF
• GND.1power
• 13pwm
• 12pwm
• 11pwm
• 10pwm
• 9pwm
• 8pwm
• 7pwm
• 6pwm
• 5pwm
• 4pwm
• 3pwm
• 2pwm
• 1usart
• 0usart
• 14usart
• 15usart
• 16usart
• 17usart
• 18usart
• 19usart
• 20i2c
• 21i2c
• 5V.1power
• 5V.2power
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44pwm
• 45pwm
• 46pwm
• 47
• 48
• 49
• 50spi
• 51spi
• 52spi
• 53
• GND.4power
• GND.5power
• IOREF
• RESET
• 3.3Vpower
• 5Vpower
• GND.2power
• GND.3power
• VINpower
• A0analog
• A1analog
• A2analog
• A3analog
• A4analog
• A5analog
• A6analog
• A7analog
• A8analog
• A9analog
• A10analog
• A11analog
• A12analog
• A13analog
• A14analog
• A15analog

Every pin above is clickable on the canvas — click one to start a wire. Board-level behavior, quirks and example links live on the family page.