Arduino Mega 2560 R3 Board, 54, Atmega2560

This Arduino Mega 2560 R3 Board is based on and fully compatible with Arduino Mega 2560 R3. 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 Uno, Duemilanove or Diecimila.The Arduino Mega 2560 R3 Board also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided from the board. The other is a not connected and is reserved for future purposes. The Mega 2560 R3 works with all existing shields but can adapt to new shields which use these additional pins.Microcontroller ATmega2560Flash Memory 256 KB of which 8 KB used by bootloader,Operating Voltage 5V to 12V DCDigital I/O Pins 54 (of which 15 provide PWM output)Clock Speed 16 MHz