{"product_id":"arduino-due-1","title":"Arduino Due","description":"\u003cp\u003eThe Arduino Due is the first Arduino board based on a 32-bit ARM core microcontroller. With 54 digital input\/output pins, 12 analog inputs, it is the perfect board for powerful larger scale Arduino projects.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003eArduino Due\u003c\/strong\u003e is a microcontroller board based on the \u003ca href=\"http:\/\/www.atmel.com\/Images\/Atmel-11057-32-bit-Cortex-M3-Microcontroller-SAM3X-SAM3A_Datasheet.pdf\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eAtmel SAM3X8E ARM Cortex-M3 CPU\u003c\/a\u003e. It 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.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarning: Unlike most Arduino boards, the Arduino Due board runs at 3.3V. The maximum voltage that the I\/O pins can tolerate is 3.3V. Applying voltages higher than 3.3V to any I\/O pin could damage the board.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe board contains everything needed to support the microcontroller; simply connect it to a computer with a micro-USB cable or power it with a 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.\u003c\/p\u003e\n\u003cp\u003eThe Due follows the 1.0 pinout:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTWI\u003c\/strong\u003e: SDA and SCL pins that are near to the AREF pin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIOREF\u003c\/strong\u003e: allows an attached shield with the proper configuration to adapt to the voltage provided by the board. This enables shield compatibility with a 3.3V board like the Due and AVR-based boards which operate at 5V.\u003c\/li\u003e\n\u003cli\u003eAn unconnected pin, reserved for future use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou can find your board warranty information \u003ca href=\"https:\/\/www.arduino.cc\/en\/Main\/warranty\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ehere\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eGetting Started\u003c\/h2\u003e\n\u003cp\u003eIn the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Guide\/ArduinoDue\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eGetting Started section\u003c\/a\u003e, you can find all the information you need to configure your board, use the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Main\/Software\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eArduino Software (IDE)\u003c\/a\u003e, and start to tinker with coding and electronics.\u003c\/p\u003e\n\u003ch2\u003eNeed Help?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOn the Software \u003ca href=\"https:\/\/forum.arduino.cc\/index.php?board=87.0\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eon the Arduino Forum\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eOn Projects \u003ca href=\"https:\/\/forum.arduino.cc\/index.php?board=3.0\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eon the Arduino Forum\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eOn the Product itself through \u003ca href=\"https:\/\/store.arduino.cc\/index.php?main_page=contact_us\u0026amp;language=en\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eArduino Customer Support\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTech Specs\u003c\/h2\u003e\n\u003ctable class=\"table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMicrocontroller\u003c\/td\u003e\n\u003ctd\u003eAT91SAM3X8E\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e3.3V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage (recommended)\u003c\/td\u003e\n\u003ctd\u003e7-12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Voltage (limits)\u003c\/td\u003e\n\u003ctd\u003e6-16V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital I\/O Pins\u003c\/td\u003e\n\u003ctd\u003e54 (of which 12 provide PWM output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Input Pins\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnalog Output Pins\u003c\/td\u003e\n\u003ctd\u003e2 (DAC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal DC Output Current on all I\/O lines\u003c\/td\u003e\n\u003ctd\u003e130 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC Current for 3.3V Pin\u003c\/td\u003e\n\u003ctd\u003e800 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDC Current for 5V Pin\u003c\/td\u003e\n\u003ctd\u003e800 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlash Memory\u003c\/td\u003e\n\u003ctd\u003e512 KB all available for the user applications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSRAM\u003c\/td\u003e\n\u003ctd\u003e96 KB (two banks: 64KB and 32KB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClock Speed\u003c\/td\u003e\n\u003ctd\u003e84 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e101.52 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e53.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e36 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOSH: Schematics\u003c\/h2\u003e\n\u003cp\u003eArduino Due is open-source hardware! You can build your own board using the following files:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.arduino.cc\/en\/uploads\/Main\/arduino-Due-Reference-design.zip\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eEagle Files\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/files\/arduino-Due-schematic.pdf?9350859181617147751\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePower\u003c\/h2\u003e\n\u003cp\u003eThe Arduino Due can be powered via the USB connector or with an external power supply. The power source is selected automatically.\u003c\/p\u003e\n\u003cp\u003eExternal (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the board's power jack. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector.\u003c\/p\u003e\n\u003cp\u003eThe board can operate on an external supply of 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 7 to 12 volts.\u003c\/p\u003e\n\u003cp\u003eThe power pins are as follows:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVin.\u003c\/strong\u003e The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). You can supply voltage through this pin, or if supplying voltage via the power jack, access it through this pin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5V\u003c\/strong\u003e.This pin outputs a regulated 5V from the regulator on the board. The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. We don't advise it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3V3\u003c\/strong\u003e. A 3.3 volt supply generated by the on-board regulator. Maximum current draw is 800 mA. This regulator also provides the power supply to the SAM3X microcontroller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGND\u003c\/strong\u003e. Ground pins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIOREF\u003c\/strong\u003e. This pin on the Arduino board provides the voltage reference with which the microcontroller operates. A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs for working with the 5V or 3.3V.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eMemory\u003c\/h2\u003e\n\u003cp\u003eThe SAM3X has 512 KB (2 blocks of 256 KB) of flash memory for storing code. The bootloader is preburned in factory from Atmel and is stored in a dedicated ROM memory. The available SRAM is 96 KB in two contiguous bank of 64 KB and 32 KB. All the available memory (Flash, RAM and ROM) can be accessed directly as a flat addressing space.\u003c\/p\u003e\n\u003cp\u003eIt is possible to erase the Flash memory of the SAM3X with the onboard erase button. This will remove the currently loaded sketch from the MCU. To erase, press and hold the Erase button for a few seconds while the board is powered.\u003c\/p\u003e\n\u003ch2\u003eInput and Output\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eDigital I\/O: pins from 0 to 53\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eEach of the 54 digital pins on the Due can be used as an input or output, using \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/PinMode\" target=\"_blank\" rel=\"noopener noreferrer\"\u003epinMode()\u003c\/a\u003e,\u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/DigitalWrite\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edigitalWrite()\u003c\/a\u003e, and \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/DigitalRead\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edigitalRead()\u003c\/a\u003e functions. They operate at 3.3 volts. Each pin can provide (source) a current of 3 mA or 15 mA, depending on the pin, or receive (sink) a current of 6 mA or 9 mA, depending on the pin. They also have an internal pull-up resistor (disconnected by default) of 100 KΩ. In addition, some pins have specialized functions:\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSerial: 0 (RX) and 1 (TX)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSerial 1: 19 (RX) and 18 (TX)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSerial 2: 17 (RX) and 16 (TX)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial 3: 15 (RX) and 14 (TX)\u003c\/strong\u003e Used to receive (RX) and transmit (TX) TTL serial data (with 3.3 V level). Pins 0 and 1 are connected to the corresponding pins of the ATmega16U2 USB-to-TTL Serial chip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePWM: Pins 2 to 13\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003e Provide 8-bit PWM output with the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/AnalogWrite\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eanalogWrite()\u003c\/a\u003e function. the resolution of the PWM can be changed with the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/AnalogWriteResolution\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eanalogWriteResolution() function.\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSPI: SPI header (ICSP header on other Arduino boards)\u003c\/strong\u003e  These pins support SPI communication using the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/SPI\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSPI library\u003c\/a\u003e. The SPI pins are broken out on the central 6-pin header, which is physically compatible with the Uno, Leonardo and Mega2560. The SPI header can be used only to communicate with other SPI devices, not for programming the SAM3X with the In-Circuit-Serial-Programming technique. The SPI of the Due has also advanced features that can be used with the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/DueExtendedSPI\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eExtended SPI methods for Due.\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCAN: CANRX and CANTX\u003c\/strong\u003e These pins support the CAN communication protocol but are not not yet supported by Arduino APIs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\"L\" LED: 13\u003c\/strong\u003e\u003cstrong\u003e \u003c\/strong\u003e There is a built-in LED connected to digital pin 13. When the pin is HIGH, the LED is on, when the pin is LOW, it's off. It is also possible to dim the LED because the digital pin 13 is also a PWM output.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTWI 1: 20 (SDA) and 21 (SCL)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTWI 2: SDA1 and SCL1.\u003c\/strong\u003e Support TWI communication using the Wire library. SDA1 and SCL1 can be controlled using the Wire1 class provided by the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/Wire\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eWire library\u003c\/a\u003e. While SDA and SCL have internal pullup resistors, SDA1 and SCL1 have not. Adding two pullup resistor on SDA1 and SCL1 lines is required for using Wire1.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnalog Inputs: pins from A0 to A11\u003c\/strong\u003e The Due has 12 analog inputs, each of which can provide 12 bits of resolution (i.e. 4096 different values). By default, the resolution of the readings is set at 10 bits, for compatibility with other Arduino boards. It is possible to change the resolution of the ADC with\u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/AnalogReadResolution\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eanalogReadResolution()\u003c\/a\u003e. The Due’s analog inputs pins measure from ground to a maximum value of 3.3V. Applying more than 3.3V on the Due’s pins will damage the SAM3X chip. The analogReference() function is ignored on the Due.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe AREF pin is connected to the SAM3X analog reference pin through a resistor bridge. To use the AREF pin, resistor BR1 must be desoldered from the PCB.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDAC1 and DAC2\u003c\/strong\u003e These pins provides true analog outputs with 12-bits resolution (4096 levels) with the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/AnalogWrite\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eanalogWrite()\u003c\/a\u003e function. These pins can be used to create an audio output using the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/Audio\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eAudio library.\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease note that DAC output range is actually from 0.55 V to 2.75 V only.\u003c\/p\u003e\n\u003cp\u003eOther pins on the board:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAREF\u003c\/strong\u003e Reference voltage for the analog inputs. Used with \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/AnalogReference\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eanalogReference()\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset\u003c\/strong\u003e Bring this line LOW to reset the microcontroller. Typically used to add a reset button to shields which block the one on the board.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.arduino.cc\/en\/Hacking\/PinMappingSAM3X\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eSee also the mapping between Arduino pins and SAM3X ports\u003c\/a\u003e\u003c\/p\u003e\n\u003ch2\u003eCommunication\u003c\/h2\u003e\n\u003cp\u003eThe Arduino Due has a number of facilities for communicating with a computer, another Arduino or other microcontrollers, and different devices like phones, tablets, cameras and so on. The SAM3X provides one hardware UART and three hardware USARTs for TTL (3.3V) serial communication.\u003c\/p\u003e\n\u003cp\u003eThe Programming port is connected to an ATmega16U2, which provides a virtual COM port to software on a connected computer (To recognize the device, Windows machines will need a .inf file, but OSX and Linux machines will recognize the board as a COM port automatically). The 16U2 is also connected to the SAM3X hardware UART. Serial on pins RX0 and TX0 provides Serial-to-USB communication for programming the board through the ATmega16U2 microcontroller. The Arduino software includes a serial monitor which allows simple textual data to be sent to and from the board. The RX and TX LEDs on the board will flash when data is being transmitted via the ATmega16U2 chip and USB connection to the computer (but not for serial communication on pins 0 and 1).\u003c\/p\u003e\n\u003cp\u003eThe Native USB port is connected to the SAM3X. It allows for serial (CDC) communication over USB. This provides a serial connection to the Serial Monitor or other applications on your computer. It also enables the Due to emulate a USB mouse or keyboard to an attached computer. To use these features, see the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/MouseKeyboard\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eMouse and Keyboard library reference pages\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe Native USB port can also act as a USB host for connected peripherals such as mice, keyboards, and smartphones. To use these features, see the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/USBHost\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eUSBHost reference pages\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe SAM3X also supports TWI and SPI communication. The Arduino software includes a Wire library to simplify use of the TWI bus; see the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/Wire\" target=\"_blank\" rel=\"noopener noreferrer\"\u003edocumentation for details. For SPI communication, use the \u003c\/a\u003e\u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/SPI\"\u003eSPI library\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eProgramming\u003c\/h2\u003e\n\u003cp\u003eThe Due can be programmed with the Arduino \u003ca href=\"https:\/\/www.arduino.cc\/en\/Main\/Software\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eArduino Software\u003c\/a\u003e (IDE). For details, see the \u003ca href=\"https:\/\/www.arduino.cc\/en\/Reference\/HomePage\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ereference\u003c\/a\u003e and \u003ca href=\"https:\/\/www.arduino.cc\/en\/Tutorial\/HomePage\" target=\"_blank\" rel=\"noopener noreferrer\"\u003etutorials\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eUploading sketches to the SAM3X is different than the AVR microcontrollers found in other Arduino boards because the flash memory needs to be erased before being re-programmed. Upload to the chip is managed by ROM on the SAM3X, which is run only when the chip's flash memory is empty.\u003c\/p\u003e\n\u003cp\u003eEither of the USB ports can be used for programming the board, though it is recommended to use the Programming port due to the way the erasing of the chip is handled :\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgramming port:\u003c\/strong\u003e To use this port, select \"Arduino Due (ProgrammingPort)\" as your board in the Arduino IDE. Connect the Due's programming port (the one closest to the DC power jack) to your computer. The programming port uses the 16U2 as a USB-to-serial chip connected to the first UART of the SAM3X (RX0 and TX0). The 16U2 has two pins connected to the Reset and Erase pins of the SAM3X. Opening and closing the Programming port connected at 1200bps triggers a “hard erase” procedure of the SAM3X chip, activating the Erase and Reset pins on the SAM3X before communicating with the UART. This is the recommended port for programming the Due. It is more reliable than the \"soft erase\" that occurs on the Native port, and it should work even if the main MCU has crashed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNative port:\u003c\/strong\u003e To use this port, select \"Arduino Due (NativeUSBPort)\" as your board in the Arduino IDE. The Native USB port is connected directly to the SAM3X. Connect the Due's Native USB port (the one closest to the reset button) to your computer. Opening and closing the Native port at 1200bps triggers a 'soft erase' procedure: the flash memory is erased and the board is restarted with the bootloader. If the MCU crashed for some reason it is likely that the soft erase procedure won't work as this procedure happens entirely in software on the SAM3X. Opening and closing the native port at a different baudrate will not reset the SAM3X.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eUnlike other Arduino boards which use avrdude for uploading, the Due relies on \u003ca href=\"http:\/\/sourceforge.net\/projects\/b-o-s-s-a\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ebossac\u003c\/a\u003e.The ATmega16U2 firmware source code is available in the \u003ca href=\"http:\/\/github.com\/arduino\/Arduino\/tree\/master\/hardware\/arduino\/firmwares\/\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eArduino repository\u003c\/a\u003e. You can use the ISP header with an external programmer (overwriting the DFU bootloader). See this \u003ca href=\"http:\/\/arduino.cc\/forum\/index.php\/topic,111.0.html\" target=\"_blank\" rel=\"noopener noreferrer\"\u003euser-contributed tutorial\u003c\/a\u003e for more information.\u003c\/p\u003e\n\u003ch2\u003eUSB Overcurrent Protection\u003c\/h2\u003e\n\u003cp\u003eThe Arduino Due has a resettable polyfuse that protects your computer's USB ports from shorts and overcurrent. Although most computers provide their own internal protection, the fuse provides an extra layer of protection. If more than 500 mA is applied to the USB port, the fuse will automatically break the connection until the short or overload is removed.\u003c\/p\u003e\n\u003ch2\u003ePhysical Characteristics and Shield Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe maximum length and width of the Arduino Due PCB are 4 and 2.1 inches respectively, with the USB connectors and power jack extending beyond the former dimension. Three screw holes allow the board to be attached to a surface or case. Note that the distance between digital pins 7 and 8 is 160 mil (0.16\"), not an even multiple of the 100 mil spacing of the other pins.\u003c\/p\u003e\n\u003cp\u003eThe Arduino Due is designed to be compatible with most shields designed for the Uno, Diecimila or Duemilanove. Digital pins 0 to 13 (and the adjacent AREF and GND pins), analog inputs 0 to 5, the power header, and \"ICSP\" (SPI) header are all in equivalent locations. Further the main UART (serial port) is located on the same pins (0 and 1). \u003cstrong\u003e\u003cem\u003ePlease note that I2C is not located on the same pins on the Due (20 and 21) as the Duemilanove \/ Diecimila (analog inputs 4 and 5)\u003c\/em\u003e\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Arduino","offers":[{"title":"Default Title","offer_id":3092621656074,"sku":"A000062","price":42.95,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0174\/1800\/products\/A000062_front_2_1_cd692a78-0277-41c4-8151-cd2152990e48.jpg?v=1530371786","url":"https:\/\/shop.pimoroni.com\/en-eu\/products\/arduino-due-1","provider":"Pimoroni Ltd","version":"1.0","type":"link"}