Emartee Nano Mega 2560 is a microntrolller board based on ATmega2560, derived from Arduino Mega 2560 with changes in pursuit for small form factor, flexibility and functionality.It has 70 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. Emartee Nano Mega 2560 is compatible with most shields designed for the Arduino Duemilanove or Diecimila, also share accessories with other Arduino family.
Difference vs. Arduino Mega2560 :
1. Smaller (30% smaller) and flat form factor
2. All IO pin break out.
3. Move Reset button for easy access
4. 2.54mm alighment for proto boards compatiblity
5. 3.3V selectable
6. Auto/Manual reset selectable
7. Full featured Uart, Bitbang ready
8. FT232RL VS ATmega8U2