Features

• 100% compatible with Arduino Mega
• 54 Digital IO
• 16 Analog inputs
• 14 PWM outputs
• 4 Hardware serial ports (UART)
• Compatible with most Arduino Duemilanove and Diecimila Shields
• ICSP Header
• Can be powered through a battery or through a AC to DC adaptor

Specification

• Microcontroller: ATmega2560
• Operating Voltage? 5V
• Input Voltage (recommended): 7-12V
• Input Voltage (limits): 6-20V
• 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

Usage

• Mega2560 Pin Mapping.
• Wiki link