MEGA2560:

   CH340G Replace ATMEGA16U2     

   Microcontroller:ATmega2560     

   Operating Voltage:5V     

   Input Voltage (recommended):7-12V     

   Input Voltage (limits):6-20V     

   Digital I/O Pins:54 (of which 15 provide PWM output)     

   Analog Input Pins:16     

   DC Current per I/O Pin:40 mA     

   DC Current for 3.3V Pin:50 mA     

   Flash Memory:256 KB of which 8 KB used by bootloader     

   SRAM:8 KB     

   EEPROM:4 KB     

   Clock Speed:16 MHz