• Microcontroller: AT91SAM3X8E
  
• Operating Voltage: 3.3V 
  
• Input Voltage (recommended): 7-12V 
  
• Input Voltage (limits): 6-16V 
  
• Digital I/O Pins: 54 (of which 12 provide PWM output) 
  
• Analog Input Pins: 12 
  
• Analog Outputs Pins: 2 (DAC) 
  
• A 32-bit core, that allows operations on 4 bytes wide data within a single CPU clock. 
  
• CPU clock at 84Mhz 
  
• 96KBytes of SRAM

The Due is a microcontroller board based on the Atmel SAM3X8E ARM Cortex-M3 CPU. The Due Arduino AT91SAM3X8E ARM Cortex-M3 Board is the first Arduino board based on a 32-bit ARM core microcontroller. It has 54 digital input / output pins (of which 12 can be used as PWM outputs), 12 analog inputs, 4 UARTs (hardware serial ports), a 84 MHz clock, an USB OTG capable connection, 2 DAC (digital to analog), 2 TWI, a power jack, an SPI header, a JTAG header, a reset button and an erase button.

The board contains everything needed to support the microcontroller; simply connect it to a computer with a micro-USB cable or power it with an AC-to-DC adapter or battery to get started. The Due is compatible with all Arduino shields that work at 3.3V and are compliant with the 1.0 Arduino pinout.