MEGA 2560 ADK R3 is a board based on the ATmega2560 microcontroller. The board has a USB host interface for connecting with MAX3421e. The board is compatible with Android accessories. It has 54 digital inputs/outputs (of which 14 can be used as PWM outputs), 16 analogue inputs, 4 UART (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power connector, ICSP, and a reset button. MEGA 2560 ADK is an enhanced version. The board has an additional function for powering the ATmega2560 microcontroller and input/output for 5V and 3.3V. Which is more convenient for developing projects on 5V or 3.3V. Like Mega 2560 and Uno, the board features the ch340G as a USB-to-serial converter. The USB-serial port uses a micro-USB connector. All functions and PinOut are similar to the official Mega ADK.