Arduino Due Description

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

Warning : Unlike most Arduino boards, the Arduino Due board runs at 3.3V.
The maximum voltage the I/O pins can tolerate is 3.3V.
Applying voltages higher than 3.3V to any I/O pin may damage the board.
The board includes 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 operate at 3.3V and adhere to the 1.0 Arduino pinout. The Due follows the 1.0 pinout:

• TWI : SDA and SCL pins that are close to the AREF pin.
• IOREF : Allows an attached shield with the correct configuration to match the voltage provided by the board. This ensures shield compatibility with a 3.3V board such as the Due and AVR based boards that operate at 5V.
• An unconnected pin, reserved for future use.

Properties Due

• Microcontroller: AT91SAM3X8E
• Operating voltage: 3.3V
• Input Voltage: 7-12V (Recommended)
• Digital I/O Pins: 54 (of which 12 provide PWM output)
• Analog Input Pins: 12
• Total DC Current on all I/O rows: 130 mA
• DC Current for 3.3V Pin: 800 mA
• DC Current for 5V Pin: 800 mA
• Flash Memory: 512 KB
• SRAM: 96 KB (two locations: 64KB & 32KB)
• Clock Speed: 84 MHz