It has 54 digital input/output pins (of which 15 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. The Mega 2560 board is compatible with most shields designed for Arduino Uno and the former boards Duemilanove or Diecimila.

• Microcontroller: Atmega328p – 8 BIT AVR controller
• Operating Voltage: 5V
• Raw Voltage input: 5V to 12V
• Maximum current through each I/O pin: 40mA
• Maximum total current drawn from the chip: 200mA
• Flash Memory: 32Kbytes
• EEPROM: 1Kbyte

1. 1.14 digital input / output port RX, TX, D2 ~ D13,
2. 2.8 analog inputs A0 ~ A7
3. 3.1 pairs TTL level serial port transceiver RX / TX
4. 4.6 PWM ports, D3, D5, D6, D9, D10, D11
5. Microcontroller using Atmel Atmega328P-AU
6. Support serial download
7. Support for external 3.5V ~ 12V DC power supply (using RAW and GND power port)
8. Support 9V battery
9. 8MHz clock frequency

Microcontroller Chip ATmega328
Analog I/O Pins 6
Digital I/O Pins 14 (of which 6 provide PWM output)
DC Current per I/O Pin 40 mA
DC Current for 3.3V Pin 50 mA
SRAM 2 KB
EEPROM 1 KB
Flash Memory 32 KB of which 0.5 KB used by bootloader
Clock Speed 16 MHz
Operating Voltage 5V
Input Voltage
7-12V