Arduino Mega 2560

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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).

Arduino Mega 2560 board

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.