On Rev1 boards: connecting the solder jumper on the back of the board (near the map of Italy) and then rese ing the 8U2.The ATmega16U2/8U2 is loaded with a DFU bootloader, which can be activated by: 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)). * Please note that USB cables, adaptors and batteries are not included! Tech Specs Microcontrollerģ2 KB (ATmega328P) of which 0.5 KB used by bootloaderĪrduino Uno is open-source hardware! You can build your own board using the follwing files: 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: The Arduino Uno SMD R3 is a microcontroller board based on the ATmega328, simply connect it to a computer with a USB type B cable or power it with a AC-to-DC adapter or battery to get started.* It has 14 digital IO pins (6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, and more. The board everybody gets started with, with the ATmega328 (SMD).
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