Arduino Due Specifications/Functions

In this article, we will explain in detail the specifications and functions of Arduino Due.

Compared to Arduino Uno, Arduino Due has more memory and I/O, and its clock speed is about 5 times higher. However, unlike other Arduino boards, the operating voltage is “+3.3V”.

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Arduino Due Specifications

Tech SpecsArduino Due
Board Size101.6×53.3mm
Microcontroller/
Clock Speed
AT91SAM3X8E/
84MHz
SRAM
(Main Memory)
96kB
Flash Memory512kB
EEPROM
Operating Voltage+3.3V
Input Voltage
(recommended)
+7~+12V
Output Voltage+5V, +3.3V
Digital I/O Pins54
PWM Digital I/O Pins12
Analog Input Pins12
Analog Output Pins
(DAC)
2
Rated Current per Pin130mA/All Pins
Program Writing PinsMicro USB Type-B
Micro USB Type-AB
ICSP
InterfaceUART
I2C
SPI
CAN
USB

For the specifications of Arduino boards other than Arduino Due, see the following article.

Arduino Due Functions

Arduino Due Appearance

Socket Header Placement(Pin Header Placement)/LED Placement

Arduino Due Pin Header LED Placement

↑Click to enlarge.

①Microcontroller(Microcomputer)

The Arduino Due Microcontroller(Microcomputer) uses “AT91SAM3X8E” from Microchip Technology(USA).

A microcontroller(microcomputer) is a very important component in controlling electronic devices that correspond to the human “brain”.

In addition, various memories such as SRAM and Flash memory are also built into the microcontroller.
(The Arduino Due does not have EEPROM.)

②USB Port

The Arduino Due has two USB ports, a “Programming Port” and a “Native USB Port”. Both can write program(sketche), but writing from the Programming port is recommended due to the difference in chip erasing behavior.

You can also power the Arduino Due via USB instead of the power jack.

Programming Port(Micro USB Type-B)

The Programming Port is connected to the Rx0/TX0 of SAM3X via the ATMmega16U2.

To write a program(sketche) on the Programming Port, select “Arduino Due (Programming Port)” in the Arduino IDE.

Since chip erasing is done by “hard erasing”, it is usually recommended to write a program on the Programming Port.

Native USB Port(Micro USB Type-AB)

The Native USB Port is directly connected to the SAM3X. USB devices such as keyboards and mice can be connected with serial communication or host mode.

To write a program(sketche) on the Native USB Port, select “Arduino Due (Native USB Port)” in the Arduino IDE.

However, since chip erasing is done by “soft erasing”, it is not recommended to write a program on the Native USB Port.

③Power Jack

You can connect an AC adapter(outer diameter 5.5mm, inner diameter 2.1mm) to power the Arduino Due.

④Reset Button

You can restart the Arduino Due by pressing the reset button. Use this when you want to restart the program from the beginning or when the Arduino Due behaves strangely.

⑤I/O Port・Power

Digital I/O・PWM

Digital I/O・PWMExplanation
D0-D53Digital input/output(0-53)
HIGH(+3.3V)/LOW(0V)
PWM
0 to +3.3V analog output
Analog output by switching between 0V and +3.3V at high speed

PWM and serial communication are shared with digital I/O. You can specify which one to use in the program.

Analog Input/Analog Output

Analog InputExplanation
A0-A11Analog input(0-11)
10-bit A/D converter(1step change every 3.2mV)
Analog OutputExplanation
DAC0-DAC1Analog output(0-1)
12-bit A/D converter(1step change every 0.81mV)

Communication

CommunicationExplanation
UART
(Serial communication)
TXSerial data transmission
RXSerial data reception
I2CSCLSerial clock
SDASerial data transmission/reception
SPISSSelect device to control
SCKSerial clock
MOSIMaster ⇒ Slave data transfer
MISOSlave ⇒ Master data transfer
CANTXSerial data transmission
RXSerial data reception

Power

PowerExplanation
VinThe voltage of “③Power jack” is output,
Power can be supplied from “Vin” without using the power jack.
GNDGround/Reference point
+5V+5V voltage output
+3.3V+3.3V voltage output

Other

OtherExplanation
GNDGround/Reference point
AREFAnalog input reference voltage (0 to +3.3V input),
Not normally used
RESETReset
(Same function as “④Reset Button”)
IOREF+3.3V voltage output

⑥LED

LEDExplanation
ONLights up when the Arduino Due is powered
TXBlinks when sending via serial communication
RXBlinks when receiving via serial communication
LConnect to digital I/O No.13

Arduino Uno has 4 LEDs(chip parts). The “L” of LED is connected to the 13th digital I/O, and can be lighted up by setting the 13th pin to HIGH(3.3V) in the program.

⑦ICSP/SPI/DEBUG/JTAG

The following terminals are installed in Arduino Due.

ICSP/SPI/DEBUG/JTAG
  • ICSP(For ATmega16U2)
  • SPI
  • DEBUG(SWD)
  • JTAG

How to get technical data for Arduino Due

Various technical materials of Arduino Due can be obtained from the official Arduino website.

Arduino Due Technical Data
  • EAGLE FILES
  • SCHEMATICS: PDF Format
  • FRITZING FILE
2
Arduino Due DOCUMENTATION

Click “DOCUMENTATION”.

3
Arduino Due EAGLE FILES SCHEMATICS FRITZING FILE Download

Click each icon to download the “EAGLE FILES”, “SCHEMATICS”, and “FRITZING FILE”.

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