Overview
The Arduino Mega 2560 is a microcontroller board based on the ATmega2560 (datasheet). 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 a AC-to-DC adapter or battery to get started. The Mega is compatible with most shields designed for the Arduino Duemilanove or Diecimila.
Schematic & Reference Design
EAGLE files: arduino-mega2560-reference-design.zip
Schematic: arduino-mega2560-schematic.pdf
Summary
| Microcontroller |
ATmega2560 |
| Operating Voltage |
5V |
| Input Voltage (recommended) |
7-12V |
| Input Voltage (limits) |
6-20V |
| Digital I/O Pins |
54 (of which 14 provide PWM output) |
| Analog Input Pins |
16 |
| DC Current per I/O Pin |
40 mA |
| DC Current for 3.3V Pin |
50 mA |
| Flash Memory |
256 KB of which 8 KB used by bootloader |
| SRAM |
8 KB |
| EEPROM |
4 KB |
| Clock Speed |
16 MHz |
Documents:
Arduino Home Page
How To
Programming Reference
Arduino Forum