Power 

• Powered via USB connection or external power supply - with power source selected automatically

• External (non-USB) power from AC-to-DC adapter (wall-wart) or battery

• Operates on an external supply of 6 to 20 volts (7-12V recommended)

Memory 

• 256KB flash memory for storing code (of which 8KB is used for the bootloader)

• 8KB SRAM

• 4KB EEPROM

Input and Output 

• 54 digital pins that can be used as an input or output

• 16 analog inputs, each of which provides 10 bits of resolution (i.e. 1024 different values)

Physical Characteristics 

• Max PCB length and width of 4 and 2.1 inches

• USB connector and power jack extend beyond PCB

  Communication 

•   Designed to communicate with a computer, 
    another Arduino, or other MCUs

•   ATmega2560 provides four hardware UARTs for 
    TTL (5V) serial communication.

•   Onboard ATmega8U2 channels one UART over 
    USB

•   ATmega2560 supports I²C (TWI) and SPI 
    communication

  Programming 

•   Can be programmed with the Arduino software

•   ATmega2560 comes preburned with bootloader 
    that allows new code to be uploaded without an 
    external hardware programmer.

•   Microcontroller can be programmed through

•   ICSP (In-Circuit Serial Programming) header