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Details zu  TAIJIUINO Due Pro Board -- completely compatible with Arduino Due

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TAIJIUINO Due Pro Board -- completely compatible with Arduino Due
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This board has been updating to R2, here is the new link for the new version: 

TAIJIUINO Due Pro R2

TAIJIUINO Due Pro R2 w/ Programmer,

What is TAIJIUINO Due Pro Board?

TAIJIUINO Due Pro board derives from Arduino Due. It is completely compatible with Arduino Due. Users could program it with Arduino IDE.

Differnece from Arduino DUE

  1. Removed the ATmega16U2 chip, break out the pins for external downloader.
  2. Break out all the unused pins of the chip ATSAM3X8E on Arduino DUE
  3. Add ethernet interface of ATSAM3X8E on the board
  4. Removed LED on Pin 13
  5. Modified the PCB layout and the PCB is gold-plated
  6. 5V Serial interface is available

Why remove ATmega16U2?

While we got the Arduino DUE board, our feeling is: oh, so complicated! We found it could be programmed either through Programming USB port or Native USB Port on Arduino Due. The we thought, why not remove one USB Port, to keep it simple and leave users more chances for innovation. As ATmega16U2 circuit takes much space on the board, we decide to remove it.

Why external programmer?

Extenal programmer is more cost-efficient. Similar with boards such as Arduino Mini or Arduino Pro, many boards could share one external programmer. If you need 10 boards to build your projects, you only need one external programmer. That will save you much money.

We developed 2 kinds of external programmer:

DUE_PROG

You could get this product from this page: Downloader / Programmer for TAIJIUINO Due Pro Board.

Basically this module is designed based on the ATmega16U2 circuit on Arduino DUE. With the bended-pin female header, users could plug in the header to Taijiuino Pro board.

DUE WIRELESS PROG

Product page: Wireless programmer

Those modules could program the Taijiuino board wirelessly. This module could also be used to send data wireless between PC and TAIJIUINO board.

Why break out more pins?

As we could see from the schematic of Arduino DUE, ATSAM3X8E has several pins which are not broken out on Arduino DUE. For most Arduino users, those pins will not be used anyway. However, we believe that on certain occasion they will be used.

We also found that the Arduino DUE schematic contains ethernet pins which, however, are not found on Arduino DUE board. It might because of the limited space on the Arduino Due board. We break them out on Taijiuino Pro Board.

Why remove the led to pin 13?

Led on Pin 13 might be helpful sometimes. We found that both PC30 and PA23 connected with LEDs. Users could use those 2 leds if neccessary. So we remove the led on pin 13 to keep the board more simple.

Warning: same with Arduino Due, this board runs at 3.3V. The maximum voltage that the I/O pins can tolerate is 3.3V. Providing higher voltages, like 5V to an I/O pin may damage the board.

Overview

The TAIJIUINO Due Pro is a microcontroller board based on the Atmel SAM3X8E ARM Cortex-M3 CPU (datasheet).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.

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. This board 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.

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 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: TAIJIUINO-Due-Pro-Reference-design.zip

Gerber files: TAIJIUINO-Due-Pro-gerber.zip

Schematic: TAIJIUINO-Due-Pro-schematic.pdf

Summary

MicrocontrollerAT91SAM3X8E
Operating Voltage3.3V
Input Voltage (recommended)7-12V
Input Voltage (limits)6-20V
Digital I/O Pins54 (of which 12 provide PWM output)
Analog Input Pins12
Analog Outputs Pins2 (DAC)
Total DC Output Current on all I/O lines130 mA
DC Current for 3.3V Pin800 mA
DC Current for 5V Pin800 mA
Flash Memory512 KB all available for the user applications
SRAM96 KB (two banks: 64KB and 32KB)
Clock Speed84 MHz

Power

The TAIJIUINO Due Pro 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 24 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 TAIJIUINO 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 SAM3X microcontroller.
  • GND. Ground pins.
  • IOREF. This pin on the TAIJIUINO 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(),digitalWrite(), anddigitalRead() 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 external programmer pins. The TTL serial data on external programmer pins are 5V.
  • PWM: Pins 2 to 13 
    Provide 8-bit PWM output with the analogWrite() function. the resolution of the PWM can be changed with theanalogWriteResolution() function.
  • SPI: SPI header (ICSP header on other Arduino boards) 
    These pins support SPI communication using the SPI library. 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.
  • CAN: CANRX and CANTX 
    These pins support the CAN communication protocol but are not not yet supported by Arduino APIs.
  • TWI 1: 20 (SDA) and 21 (SCL)
  • TWI 2: SDA1 and SCL1. 
    Support TWI communication using the Wire library.
  • 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 withanalogReadResolution(). The Due’s analog inputs pins measure from ground to a maximum value of 3.3V. Applying more then 3.3V on the Due’s 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, resistorBR1 must be desoldered from the PCB.

  • DAC1 and DAC2 
    These pins provides true analog outputs with 12-bits resolution (4096 levels) with theanalogWrite() function. These pins can be used to create an audio output using the Audio library.

Other pins on the board:

  • AREF 
    Reference voltage for the analog inputs. Used with 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 Taijiuino Due Pro 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 broken out for expternal programmers. Those pins could also be used to communicate with Taijiuino board. The TXD and RXD pins are connect to TX0 and RX0 pins of Taijiuino board through a TTL shifter, which converts TTL between 5V and 3V3.

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.

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.

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 for details. For SPI communication, use the SPI library.

Programming

The TAIJIUINO Due Pro can be programmed with the Arduino software (download). For details, see the reference and tutorials.

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 theSAM3X, which is run only when the chip's flash memory is empty.

There are two ways to program the boards:

  1. Native port: To use this port, select "TAIJIUINO Due Pro (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.
  2. External Programming port: To use this port, you need external programmers. Now the  Downloader / Programmer for TAIJIUINO Due Pro Board is available.

USB Overcurrent Protection

The TAIJIUINO Due Pro 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.

Product List

TAIJIUINO Pro board x1

Shipping Information

PLEASE DO NOT CHOOSE FREE SHIPPING IF YOU COULDN'T WAIT!!!!!

Standard Int'l Shipping is recommended !!!

Economy Int'l Shipping

(Free Shipping)

Usually we ship it as Registered Mail of China Post(trackable) or Air Mail of HK Post (not trackable).The shipping time is usually 15~45 workdays.

Registered Mail of China Post has a tracking number. Sometimes it is fast but sometimes it is slow.

Air Mail of HK Post is not trackable. If you don't receive it within 45 workdays, please contact us and we will ship again.

Standard Int'l Shipping

We shipped mails as Registered Mail of Hongkong/Singapore Post. For most countries, you could track the whole shipping process. Usually it is faster than the Free Shipping above.

You could refer to this document to learn the shipping time.

Express Delivery Shipping This shipping service contains DHL, UPS, EMS and Fedex. Usually it takes 4~7 workdays. If you couldn't find this option but you need it, please contact us.

Hanlding time will be 1~3 workdays.

Shipping Policy

  • Import duties and taxes are supposed at buyers' charge.
  • We always mark our customers' parcels as a gift.
  • We ship to worldwide.

Returns and Refund Policy

We will ship again or do the refund if you are not satisfied with our products for any reason. For due to our products' problem, we will do full refund (including shipping fee).

Note

DO NOT LEAVE NEGATIVE FEEDBACK BEFORE CONTACING WITH US.All the problems could be solved well. Please contact us if you have any problem. Negative feedback offers no help to solving problems. We keep the right to refuse offering any post-sale service if negative feedback was received.

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