Uno MCU Board

ATmega328-based microcontroller board from Arduino

Image of Arduino's Uno MCU BoardThe Arduino Uno is a microcontroller board based on the ATmega328. It has 14 digital input/output pins (of which six can be used as PWM outputs), six analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with an AC-to-DC adapter or battery to get started.

The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead, it features the ATmega8U2 programmed as a USB-to-serial converter. Revision 2 of the Uno board has a resistor pulling the 8U2 HWB line to ground, making it easier to put into DFU mode.

  • 14 digital I/O pins (six of which provide PWM output)
  • 3.3 V supply generated by an on-board regulator
  • Six analog input pins
  • 32 KB of flash memory
  • Can supply 40 mA of DC current per pin
  • 16 MHz clock speed
  • Code example from Arduino website to help get started

Uno MCU Board

ImageManufacturer Part NumberDescriptionBoard TypeTypeCore ProcessorAvailable Quantity
ARDUINO UNO BOARD REV3A000066ARDUINO UNO BOARD REV3Evaluation PlatformMCU 8-BitAVR931 - Immediate
A000066 product page link
Published: 2012-06-29