Arduino ATmega2560-16AU is the newest and most powerful arduino board.

Descruption
Arduino ATmega2560-16AU is the newest and most powerful arduino board.
Compared with ATmega128, it has the following 2 new features:
1. ATMEGA2560 is used, the memory size is doubled comparing to ATmeaga 128
2. ATmega8U2 is used as replacement of FT232RL as USB bridget. Besids USB-UART bridge, it can also be configured as mouse, joystick, camera or keyboard.
Features:

ATmega2560

  
 1.Microcontroller:ATmega2560


 2.Operating Voltage:5V


 3.Input Voltage (recommended):7-12V


 4.Input Voltage (limits):6-20V


 5.Digital I/O Pins:54 (of which 14 provide PWM output)


 6.Analog Input Pins:16


 7.DC Current per I/O Pin:40 mA


 8.DC Current for 3.3V Pin:50 mA


 9.Flash Memory:256 KB of which 4 KB used by bootloader


 10. SRAM:8 KB


 11.EEPROM:4 KB


 12.Clock Speed:16MHz