Arduino Due Without Headers

The Arduino Due is a microcontroller board based on the Atmel SAM3X8E ARM Cortex-M3 CPU.

It is the first Arduino board featuring a 32-bit ARM core microcontroller.

It offers 54 digital input/output pins, 12 of which can be used as PWM outputs, 12 analog inputs, 4 UARTs, and a clock speed of 84 MHz.

The board also includes USB OTG, 2 DACs, 2 TWIs, a power jack, SPI and JTAG headers, a reset button, and an erase button.

Warning: The Arduino Due operates at 3.3V. Applying voltages higher than 3.3V to any I/O pin may damage the board.

The board supports micro-USB power or AC-to-DC adapters/batteries. It's compatible with Arduino shields that work at 3.3V and adhere to the 1.0 Arduino pinout.

Tech Specs:

• Microcontroller: AT91SAM3X8E
• Operating Voltage: 3.3V
• Input Voltage (recommended): 7-12V
• Input Voltage (limits): 6-16V
• Digital I/O Pins: 54 (12 of which provide PWM output)
• Analog Input Pins: 12
• Analog Output Pins: 2 (DAC)
• Total DC Output Current on all I/O lines: 130 mA
• DC Current for 3.3V Pin: 800 mA
• DC Current for 5V Pin: 800 mA
• Flash Memory: 512 KB (all available for user applications)
• SRAM: 96 KB (two banks: 64KB and 32KB)
• Clock Speed: 84 MHz
• Length: 101.52 mm
• Width: 53.3 mm
• Weight: 36 g

Power:

The Arduino Due can be powered either via the USB connector or an external power supply (AC-to-DC adapter or battery).

External power supply can come from:

• An AC-to-DC adapter connected to the board's power jack
• Battery leads connected to the GND and VIN pin headers

The board can operate with an external supply of 6 to 20V, but the recommended range is 7 to 12V.

The power pins are:

• Vin: Input voltage from the external power source
• 5V: Regulated 5V from the board's regulator
• 3V3: 3.3V supply generated by the on-board regulator (max current: 800 mA)
• GND: Ground
• IOREF: Voltage reference for the microcontroller to operate.