The Arduino MEGA 2560 is a board based on the ATmega2560 and replaces the Arduino MEGA 1280.
Required for RAMPS boards to work.
Contains:
54 digital inputs/outputs
15 PWM outputs,
4 hardware serial ports,
external interrupts),
16 analog ch inputs
16MHz crystal oscillator
USB connector
Power connector
ICSP connector and
Reset button.
LED indication of supply voltage, RX/TX signals and user LED.
The Arduino MEGA 2560 differs in the absence of an FTDI chip for converting a USB to serial interface. Instead, the newer version provides an ATmega16U2 that works as USB-to-serial.
NEW MEGA 2560 FEATURES
added SDA and SCL pins near the AREF pin and two new pins located near the RESET signal
