The arduino mega 2560 is a microcontroller board based on the atmega2560. It has 54 digital input/output pins (of which 15 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. The mega 2560 is an update to the arduino mega, which it replaces. The mega2560 differs from all preceding boards in that it does not use the ftdi usb-to-serial driver chip. Instead, it features the atmega16u2 (atmega8u2 in the revision 1 and revision 2 boards) programmed as a usb-to-serial converter.

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