Arduino - ArduinoBoardDue

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Arduino Due

(http://arduino.cc/en/uploads/Main/ArduinoDue_Front.jpg) (http://arduino.cc/en/uploads/Main/ArduinoDue_Back.jpg)

Arduino Due Front Arduino Due Back

(http://store.arduino.cc/it/index.php?

main_page=product_info&cPath=11_12&products_id=243) (http://arduino.cc/en/Main/Buy)

Overview

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

(http://www.atmel.com/Images/doc11057.pdf)). 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.

Warning: Unlike other Arduino boards, the Arduino Due board runs at 3.3V. The maximum voltage that the I/O pins can tolerateis 3.3V. Providing higher voltages, like 5V to an I/O pin could damage the board.

The 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.

The Due follows the 1.0 pinout:

TWI: SDA and SCL pins that are near to the AREF pin.

The IOREF pin which 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.

An unconnected pin, reserved for future use.

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The Due has a dedicated forum (http://arduino.cc/forum/index.php/board,87.0.html) for discussing the board.

ARM Core benefits

The Due has a 32-bit ARM core that can outperform typical 8-bit microcontroller boards. The most significant differences are:

A 32-bit core, that allows operations on 4 bytes wide data within a single CPU clock. (for more information look int type

(http://arduino.cc/en/Reference/Int) page).

CPU Clock at 84Mhz.

96 KBytes of SRAM.

512 KBytes of Flash memory for code.

a DMA controller, that can relieve the CPU from doing memory intensive tasks.

Schematic, Reference Design & Pin Mapping

EAGLE files: arduino-Due-reference-design.zip (http://arduino.cc/en/uploads/Main/arduino-Due-Reference-design.zip)

Schematic: arduino-Due-schematic.pdf (http://arduino.cc/en/uploads/Main/arduino-Due-schematic.pdf)

Pin Mapping: SAM3X Pin Mapping page (http://arduino.cc/en/Hacking/PinMappingSAM3X)

Summary

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)

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 the user applications

SRAM 96 KB (two banks: 64KB and 32KB)

Clock Speed 84 MHz

Power

The Arduino Due can be powered via the USB connector or with an external power supply. The power source is selected

automatically.

External (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.

The 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.

The power pins are as follows:

VIN. 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.

5V. 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.

3.3V. 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

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SAM3X microcontroller.

GND. Ground pins.

IOREF. 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.

Memory

The 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.

It 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.

Input and Output

Digital I/O: pins from 0 to 53

Each of the 54 digital pins on the Due can be used as an input or output, using pinMode() (http://arduino.cc/en/Reference/PinMode), digitalWrite()

(http://arduino.cc/en/Reference/DigitalWrite), and digitalRead() (http://arduino.cc/en/Reference/DigitalRead) 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 KOhm. In addition, some pins have specialized functions:

Serial: 0 (RX) and 1 (TX)

Serial 1: 19 (RX) and 18 (TX)

Serial 2: 17 (RX) and 16 (TX)

Serial 3: 15 (RX) and 14 (TX)

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.

PWM: Pins 2 to 13

Provide 8-bit PWM output with the analogWrite() (http://arduino.cc/en/Reference/AnalogWrite) function. the resolution of the PWM can be

changed with the analogWriteResolution() (http://arduino.cc/en/Reference/AnalogWriteResolution) function.

SPI: SPI header (ICSP header on other Arduino boards)

These pins support SPI communication using the SPI library (http://arduino.cc/en/Reference/SPI). 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 Extended SPI methods for Due (http://arduino.cc/en/Reference/DueExtendedSPI).

CAN: CANRX and CANTX

These pins support the CAN communication protocol but are not not yet supported by Arduino APIs.

"L" LED: 13

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 outuput.

TWI 1: 20 (SDA) and 21 (SCL)

TWI 2: SDA1 and SCL1.

Support TWI communication using the Wire library (http://arduino.cc/en/Reference/Wire).

Analog Inputs: pins from A0 to A11

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 analogReadResolution()

(http://arduino.cc/en/Reference/AnalogReadResolution). The Dues analog inputs pins measure from ground to a maximum value of 3.3V. Applying

more then 3.3V on the Dues pins will damage the SAM3X chip. The analogReference() function is ignored on the Due.

The 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.

DAC1 and DAC2

These pins provides true analog outputs with 12-bits resolution (4096 levels) with the analogWrite() (http://arduino.cc/en/Reference/AnalogWrite)

function. These pins can be used to create an audio output using the Audio library (http://arduino.cc/en/Reference/Audio).

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Other pins on the board:

AREF

Reference voltage for the analog inputs. Used with analogReference (http://arduino.cc/en/Reference/AnalogReference)().

Reset

Bring this line LOW to reset the microcontroller. Typically used to add a reset button to shields which block the one on the board.

Communication

The 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.

The 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).

The 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 Mouse and Keyboard library reference pages

(http://arduino.cc/en/Reference/MouseKeyboard).

The 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 USBHost reference pages (http://arduino.cc/en/Reference/USBHost).

The SAM3X also supports TWI and SPI communication. The Arduino software includes a Wire library to simplify use of the TWI bus;

see the documentation (http://arduino.cc/en/Reference/Wire) for details. For SPI communication, use the SPI library

(http://arduino.cc/en/Reference/SPI).

Programming

The Arduino Due can be programmed with the Arduino software (download (http://arduino.cc/en/Main/SoftwareDue)). For details,

see the reference (http://arduino.cc/en/Reference/HomePage) and tutorials (http://arduino.cc/en/Tutorial/HomePage).

Uploading 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.

Either 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 :

Programming port: To use this port, select "Arduino Due (Programming Port)" 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

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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.

Native port: To use this port, select "Arduino Due (Native USB Port)" 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.

Unlike other Arduino boards which use avrdude for uploading, the Due relies on bossac (http://sourceforge.net/projects/b-o-s-s-

a/).

The ATmega16U2 firmware source code is available in the Arduino repository

(http://github.com/arduino/Arduino/tree/master/hardware/arduino/firmwares/). You can use the ISP header with an external

programmer (overwriting the DFU bootloader). See this user-contributed tutorial

(http://arduino.cc/forum/index.php/topic,111.0.html) for more information.

USB Overcurrent Protection

The 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.

Physical Characteristics and Shield Compatibility

The 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.

The 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). Please 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).

COMMENTS

ahref 1/24/2013

So you changed the pin layouts again and the voltage. Can we get some shield backwards compatibility please. As the rest of the

community seem intent on living in the dark ages of the UNO pin layout.

mbanzi 1/24/2013

The pin layout is the same as the recent (2010) boards. it's called R3 layout.

This class of processors do not work at 5v so we have to run at 3.3v. We added the IOREF pin so that shields can detect the

operating voltage of their "motherboard" our Ethernet and Wifi shield support that.

To make the IO on this board work at 5v we would have to make it much more complex and expensive.

mbanzi 1/25/2013

ahref I apologise but I have , by mistake, deleted your comment... I'm pasting it here for future reference: Ahref "I understand that

is an issue. My issue is not exactly with the voltage but

more with SPI, a lot of shields take SPI from the 10-13 range of pins. On

the mega this was moved up to 50. In addition to this every shield involving

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serial components still drives from pin 2 and 3. I can enable software SPI

but this is slower. By moving SPI yet again you yield 0 backwards

compatibility for SPI dependent shields.

I understand the complexity issues and apologize if my last comment seemed a

tad ranty."

mbanzi 1/25/2013

Moving SPI to the ICSP connector even predates the R3 layout... not all shield designers are willing to update their design but the

world has to change anyway... :)

ahref 1/26/2013

I love change, Greatly enjoyed the freedom purchasing a mega gave but then D:'ed at the inaccuracies on its product page. It says

UNO shields are mostly compatible. Any chance this could be expanded to warn about the SPI move and perhaps mildy shunning

the use of 2 and 3 for software serial. I need those for interrupts :)

meatmydesk 2/1/2013

DsPic33 convert, ive lost the pwm capability but gained 32 vs 16 bit,so no need for floats really but the pic had fp hardware. I2c on

DMA is nice . 84 MHz is nice, could be better. new to Arduino 4 weeks ago but very easy transition , mixed MPU6050 with Micromag

using LSM303 algorythm. sweet. will be sweeter when both are pushed to DMA.

niccoreyes 2/10/2013

is it possible to use 5v IR sensors (ex Sharp 2Y0A02) with any of the Due's analog pins with the AREF pin connected to the 5v?

ksander 2/17/2013

What is the maximum sample rate possible at one Analog Input?

CephasAntipodes 2/19/2013

It depends. The core CPU supports sampling at 1 sample per microsecond (1Ms/S). But the AnalogRead() function has so much

library overhead that you will not get more than about 50ks/S (50,000 samples per second). If you examine the library code, you

can find the main source statements to put in your own file, but that will take some skill. If you're a C programmer, it's a piece of

cake. If you're not, it's a bucket of spaghetti! I hope this helps.

DanRek 11/29/2013

So if I need 100ksps Due is useless?

josheeg 2/27/2013

I wanted to program the arduino due to do some linear algebra operations. Linear Discriminant Analysis. The code blocks c++

release code is over 520k already So I wonder is their ways to compile the program smaller and will it be smaller put into the

arduino due as shown in the forums? It is on my pc now.

What are ways to add more program memory???

vanderleymaia 3/2/2013

Very Nice! :)

Waiting to test

spok 3/2/2013

A version with loads of 3.3/5V converters on every port would me nice so i don't have to buy a 3.3v version of the hunderets of 5v-

chips i alrady have.

mbanzi 4/4/2013

this would have made the product incredibly expensive.. already a lot of people find it too costly at 49USD... imagine if it cost

70USD..

LaMega 3/6/2013

Why don`t works some of the library?

For example: IRremote.h

mbanzi 4/4/2013

Many libraries written for Arduino by users are designed to access the ATMEGA328 registers directly (the processor found on the

Arduino Uno) which obviously don't exist on the SAM3X processor. it's impossible for those libraries to work unless they are

adapted for the Due.

Many libraries are user contributed so we can't port them all without the help of the original author and the community

josheeg 3/10/2013

I see their is a eagle schematic and board.

Does anyone have a bill of materials or parts list like the one that can be exported from eagle with the actual manufactures part

numbers they use?

mbanzi 4/4/2013

All the information officially available is the Eagle files. People have been able to make their own version just using those files.

Janos 3/16/2013

Is Arduino Due certificated UL?

alya 3/22/2013

can matlab 2012a support arduino due ?

tbit 3/28/2013

It appears the reference design provided does not match up with the photo? See the silkscreen on the comms pins...which one is

correct? Is there a board and schematic floating around?

tbit 3/28/2013

Sorry i mean is there a "new" reference design board and schematic available

fuscof 3/29/2013

Arduino Due is very frustrating. I cannot imagine who of your team decided to meke it sellable. The creator of iphone4 was fired for

less.

mbanzi 4/4/2013

fuscof: There is a lot of people using the Due right now to build quite complex projects. what is it that you find frustrating? you

should post here and we can help you http://arduino.cc/forum/index.php/board,87.0.html

sambino 4/6/2013

hello i am a news comon on this forum !!!

can you tell me if the shield wifi is compatible with the arduino DUE.

i have many error if i compilate my programme using arduino DUE.

wanghuynh 4/7/2013

Can it use with Simulink Coder

Kuya_Marc 4/8/2013

Hello World! I'm in the process of improving my multiplexing 7-Segment LED display code on my Arduino DUE that I received a

week ago from element14. As a veteran programmer, I've quickly learned how to change frustrations into programming ideas. If a

library doesn't exist, write code to make it run as a function.

By the way, I'm not writing libraries for other people, I'm just making the Arduino Due work for me. It's both an Educational and

Programming experiences, combined into one!

paresh1990 4/12/2013

Whats the library for using code like TIMSK2, TOIE2, TCCR2A, WGM21, WGM20, TCCR2B, WGM22, ASSR, AS2, OCIE2A, CS22, CS20, CS21,

TCNT2....I am fully in trouble with Arduino Due as I don't know why it is giving error like this " 'TCNT2' was not declared in this

scope" for every syntax....? Please help if any one knows it...

sufyan785 4/23/2013

how to get data coming serially from due Board plotted?

benabdifateh 4/24/2013

I have a problem with my arduino due, I have the processor heats, and when I am trying to load a program in aruino due after the

compilation it shows me this message (No Device detected in COM3), if You have a solution for this problem please help me! and

thank you

AC3000 4/24/2013

Hi benabdifateh,

be sure of using the proper "Board" in the ide [Arduino Due (Native USB Port) / Arduino Due (Programming Port)] and the right

"Serial Port".

However, if you need, the Due has a dedicated forum for discussing the board here:

http://arduino.cc/forum/index.php/board,87.0.html

AC

benabdifateh 4/24/2013

thank you AC3000 for the answer, but i'm sure i use the right port tha programming port and the com3 but when i branche my

arduino due the processor be very heat ,

wilbert_bongers 4/25/2013

Hello,

For a upcoming project I am thinking of using a Due because of the number of external interrupts. Are these allready supported by

Arduino?

Thanks

sufyan785 4/27/2013

Hello,

I got my DUE board a week ago and tried its I2C connection but it is not working and when i browsed a little and i find out its not

only my problem.

http://arduino.cc/forum/index.php?topic=146802.0

http://arduino.cc/forum/index.php?topic=145697.0

how can YOU start selling a product without verifying?Is there any solution to that problem?

twocsies 4/28/2013

I read this note above, but this trivia is not mentioned on those threads that you posted.

"Please 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)."

sufyan785 4/28/2013

i know about the pins .i checked connections hundred times.but its not working. i want to interface sparkfun altitude sensor

MPL3115a2 with Arduino DUE through I2C communication.i burned the following linked code but nothing happend.

https://github.com/sparkfun/MPL3115A2_Breakout/blob/master/firmware/mpl3115a2/mpl3115a2.ino

can someone detect where the problem is?

AC3000 4/30/2013

Hi to all,

you can write to [email protected] or ask on the official DUE forum (http://arduino.cc/forum/index.php/board,87.0.html).

AC

sufyan785 5/1/2013

i asked there too but no one answer me.or may be on one has the answer.

michael__k 5/11/2013

Hi,

I have a question. If i try to upload a sketch to my due via the programming port, the IDE writes "no device found on COM18". But it

has already worked. I use windows and I have installed the driver for the board. However when I try to upload a sketch via the

native usb port it works. How can I fix this problem.

mic_76 5/25/2013

Is the TFT library compatible with the DUE board?

ACicchi 5/25/2013

Hi mic,

yes it is. Take a look at how to connect the TFT LCD to the Due: http://arduino.cc/en/Guide/TFTtoBoards

AC

mic_76 5/25/2013

I have the IDE v.1.5.2 (the version with the DUE support) but in this version there isn't the TFT library. I have found the library in the

folder of the IDE v.1.0.5 and I have imported this library in IDE v.1.5.2, but if I try to compile any TFT example sketch an error is

generated.

ACicchi 5/27/2013

Hi mic,

the TFT library, for now, works on the Due just with the "Nightly Build" version. You can download it from this link:

http://arduino.cc/en/Main/Software.

AC

mic_76 5/27/2013

Thank you.

Michele

jens_munk 5/31/2013

I have an older Ethernet shield laying around. Will this work with the Due or do I need to get the latest Rev. 3 shield?

Jens.

ACicchi 6/4/2013

Hi jens_munk,

yes, for the Due, you have to get the latest Rev 3.

AC

hnygaard87 6/6/2013

Why is it not recommended to run directly off 5V (bypassing the LM2734Y) As I see it, the 3.3V regulator (NCP1117ST33T3G) can

handle up to 20V input. The only other component running off 5V as far as I can see is the ATMEGA16U2, and that is decoupled and

5.5V tolerant.

For my project it would be more convenient to use a 5V supply (as it will be supplying some motors)

ACicchi 6/10/2013

Hi hnygaard87,

theoretically it could be possible (even if not absolutely recommended). But, if you bypass the regulator, you could not have

precisely 5V but also spikes, fluctuations etc... It will damage the board and void the Arduino warranty.

However, you can supply power to the motors with external sources, using also an H-Bridge or a Mosfet to drive them.

AC

adamatcooranbong 6/13/2013

Hi ACicchi,

Do you have a rough ETA of when the Due board will be supported on the GSM shield?

Cheers

Adam

ACicchi 6/13/2013

Hi Adam,

unluckily we still don't have an ETA for the software serial library to make the GSM compatible with the Due. We have to wait.. :)

Cheers,

AC

Lord_Corwin 6/30/2013

Hi, how much does it weight this board? Thanks.

ACicchi 7/4/2013

Hi Lord,

its weight is 36,17g.

AC

Stefanodal74 7/10/2013

The arduino DUE board support the realy shield v 2.0 ?

ACicchi 7/11/2013

Hi Stefanodal74,

I'm sorry but the relay shield is not an official Arduino product so you should ask to the distributor where you decided to purchase

it from.

Regards,

AC

ehacker 7/23/2013

What is the exact sampling rate for a simple Analog read, with serial print function? Would it increase if I decrease the resolution to

10-bit? (It would be great if you could have a page for sampling rate of this board)

Also is the "Input Voltage 6-16V" refers to analag input voltage? Could you explain.

Thanks a lot

I'll be waiting for your respond.

Ehsan

Federico_Vanzati 7/24/2013

The default sample rate of the analog inputs of the Arduino Due is 39 s. If you add serial prints in your sketch your loop time will

increase with the overall effective time between two analog readings. Increasing or decreasing the resolution will not have any

affect on the sampling rate.

The input voltage is intended for providing external power supply with a wall wart connected to the DC connector on the board.

Kind,

FV

ehacker 7/26/2013

Thank you for your reply.

So what would be the approximate ADC sampling rate with one serial print for Due?

Also do I have to use the Native USB port for serial print? And can I use micro usb b for the native usb or does it have to be micro

usb a?

One more, Is there any issues with Arduino 1.5.2?

I'll stay tuned for your response.

Thanks again

seulater 8/1/2013

I just received my kit. Would it have killed you guys to throw in a USB - Micro cable ?

arduinowithanuj 9/16/2013

I am using its 12 bit ADC but couldn't get sampling rate limitations in its datasheet. I am interested to know max and min sample

rate allowed in ADC for good accuracy.

chicaaa 9/18/2013

Hi arduinowithanuj,

The minimum sample rate allowed in ADC is 1 sample per microsecond (1Ms/S)and the maximum is 50ks/S (50,000 samples per

second).

BriComp 10/15/2013

When are you going to correct the schematic?

R23 is shown as 10k and the board will not reset with this value.

Pull up resistors on the I2C bus are shown as 1k5. It is unlikely that the I2C bus will work properly or if at all with these low values!!!

These errors have been acknowledged for some time but still you publish erroneous documents!!!

tmirante 10/21/2013

HALLO PLEASE HELP: are sketchs and ethernet shield of arduino uno compatible with arduino 2???

elsiesemico 11/16/2013

Is it possible to program arduino due in cpp?

zczlgr4 12/20/2013

Hi, I am try to apply the DUE in my DC/DC step up converter. I want to feedback output voltage(5V) directly to the input pin. But I

suppose this will damage the board, right?

Do you have product, which is powered by 3.3V, but its I/O pins can suffer above 5V? Thanks.

I try to prevent using potential divider, as the risisters have tolerance.

honboy 12/23/2013

arduino dueTWI1aref

jamastrangi 1/11/2014

A Brazilian Good afternoon for all. I have a question.

What type of oscillator has the Arduino DUE? Is ceramic or crystal?

simonbond 1/31/2014

Dear Forum,

Hi, I am fairly new to the Arduino Due.

I note that the Due uses 3.3v levels. In that case, how would one interface to the standard 5v TTL levels, or the even higher voltages

of CMOS? Say for instance octal data latches, Digital to Analogue Converters etc.

I thought there may be some suitable voltage translator ICs, or could be achieved with some resistors & discrete devices maybe?

Any help or advice would be greatly appreciated.

Thanks,

Simon B.

GnReddy 2/11/2014

I need to collect large data from sensors and pass those data to computer via USB and using this data I need to make a bitmap

Image.Can I use Arduino Due for this.Sensors count is >70.

adriangama94 4/22/2014

Share

Hola quisiera saber si se le puede conectar un sensor ultrasonico que funciona a 5 V ? pero no se si sa seal se puede conectar a este

arduino por que funciona a 3v

??

borocci 4/24/2014

Is it possible to set each single CPU register of the arduino due board?

On Arduino uno i used the syntax:

#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))

#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))

to clear and set each bit register but it seems doesn't work on arduino due board.

eLabGuy 5/4/2014

Hi all, I am trying to build my own Arduino Due and I am wondering

1. if I can use the FT232 to program the Atmel SAM3X8E instead of using the ATMEGA16U2 ?

2. Does the Arduino IDE support using FT232 to program the Atmel SAM3X8E ?

3. There are some unused pin in the ATMEGA16U2 PC10,PC11, can I use the PORTC = ... command to control the PIN in the IDE?

thanks for you all

walterp 5/26/2014

ciao a tutti !

Sarei interessato al Arduino 2 ma leggendo che lavora a 3.3V sono un po confuso .Praticamente vorrei utilizzarlo in un progetto

come cpu principale di un plc.Le schede del plc sono sviluppate con altri micro che lavorano tutte a 5V .Una scheda pannello per

esmepio usa un lcd 16x2 classico con tastierino 4x4 , dspic e i2c come slave e deve comunicare con la cpu Arduino due .Altre schede

come I/O digitale optoisolati si basano su altri micro a 5v , comunicazione I2C compresa.Per cui quello che vorrei sapere come

poter implemetnare arduino due con i suoi 3.3V .Per esempio se voglio testare un lcd 16x2 con arduino 2 potrei alimentare l'lcd a 5 v

e i segnali di dati , enable , RS , W/S a 3.3 V ma non vorrei combinare disastri .all'inizio optavo per un arduino 2560 ma poi vedendo il

due ...sinceramente con memoria programma e ram , uscite DAC a 12 bit , ingressi analogici ect mi fa gola.Potete farmi qualche

delucidazione ? Grazie e ciao

Walter

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