The ATmega16U2 (or 8U2 in the rev1 and rev2 boards) firmware source code is available in the Arduino repository. You can also bypass the bootloader and program the microcontroller through the ICSP (In-Circuit Serial Programming) header using Arduino ISP or similar see these instructions for details.
It communicates using the original STK500 protocol ( reference, C header files). The ATmega328 on the Arduino Uno comes preprogrammed with a bootloader that allows you to upload new code to it without the use of an external hardware programmer. For details, see the reference and tutorials. Select "Arduino/Genuino Uno from the Tools > Board menu (according to the microcontroller on your board). The Arduino Uno can be programmed with the ( Arduino Software (IDE)). You can find here your board warranty information. Need any help with your board please get in touch with the official Arduino User Support as explained in our Contact Us page. Need Help?Ĭheck the Arduino Forum for questions about the Arduino Language, or how to make your own Projects with Arduino. The Getting Started section contains all the information you need to configure your board, use the Arduino Software (IDE), and start tinkering with coding and electronics.įrom the Tutorials section you can find examples from libraries and built-in sketches as well other useful information to expand your knowledge of the Arduino hardware and software. If you are interested in boards with similar functionality, at Arduino you can find: The Uno is the latest in a series of USB Arduino boards, and the reference model for the Arduino platform. The Uno and version 1.0 will be the reference versions of Arduino, moving forward. "Uno" means "One" in Italian and is named to mark the upcoming release of Arduino 1.0. 1.0 pinout: added SDA and SCL pins for TWI communication placed near to the AREF pin and two other new pins placed near to the RESET pin, the IOREF that allow the shields to adapt to the voltage provided from the board and the second one is a not connected pin, that is reserved for future purposes.ATmega16U2 instead 8U2 as USB-to-Serial converter.The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip.Īdditional features coming with the R3 version are: It contains everything needed to support the microcontroller simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator (CSTCE16M0V53-R0), a USB connection, a power jack, an ICSP header, and a reset button. The Arduino Uno Rev3 SMD is a microcontroller board based on the ATmega328.
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