Arduino UNO R3 Bedienungsanleitung
Arduino® UNO R3
1 / 13 Arduino® UNO R3 / Rev. 01 - 25/11/2021
Product Reference Manual
SKU: A000066
Description
The Arduino UNO R3 is the perfect board to get familiar with electronics and coding. This versatile microcontroller
is equipped with the well-known ATmega328P and the ATMega 16U2 Processor.
This board will give you a great first experience within the world of Arduino.
Target areas:
Maker, introduction, industries
Arduino® UNO R3
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Features
ATMega328P Processor
Memory
AVR CPU at up to 16 MHz
32KB Flash
2KB SRAM
1KB EEPROM
Security
Power On Reset (POR)
Brown Out Detection (BOD)
Peripherals
2x 8-bit Timer/Counter with a dedicated period register and compare channels
1x 16-bit Timer/Counter with a dedicated period register, input capture and compare channels
1x USART with fractional baud rate generator and start-of-frame detection
1x controller/peripheral Serial Peripheral Interface (SPI)
1x Dual mode controller/peripheral I2C
1x Analog Comparator (AC) with a scalable reference input
Watchdog Timer with separate on-chip oscillator
Six PWM channels
Interrupt and wake-up on pin change
ATMega16U2 Processor
8-bit AVR® RISC-based microcontroller
Memory
16 KB ISP Flash
512B EEPROM
512B SRAM
debugWIRE interface for on-chip debugging and programming
Power
2.7-5.5 volts
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CONTENTS
1 The Board
1.1 Application Examples
1.2 Related Products
2 Ratings
2.1 Recommended Operating Conditions
2.2 Power Consumption
3 Functional Overview
3.1 Board topology
3.2 Processor
3.3 Power Tree
4 Board Operation
4.1 Getting started - IDE
4.2 Getting started - Arduino Web Editor
4.3 Getting started - Arduino IoT Cloud
4.4 Sample Sketches
4.5 Online Resources
4.6 Board Recovery
5 Connector Pinouts
5.1 JANALOG
5.2 JDIGITAL
5.3 Mechanical Information
5.4 Board Outline & Mounting Holes
6 Certifications
6.1 Declaration of Conformity CE DoC (EU)
6.2 Declaration of Conformity to EU RoHS & REACH 211 01/19/2021
6.3 Conflict Minerals Declaration
7 FCC Caution
8 Company Information
9 Reference Documentation
10 Revision History
Arduino® UNO R3
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1 The Board
1.1 Application Examples
The UNO board is the flagship product of Arduino. Regardless if you are new to the world of electronics or will use
the UNO as a tool for education purposes or industry-related tasks.
First entry to electronics: If this is your first project within coding and electronics, get started with our most used
and documented board; Arduino UNO. It is equipped with the well-known ATmega328P processor, 14 digital
input/output pins, 6 analog inputs, USB connections, ICSP header and reset button. This board includes everything
you will need for a great first experience with Arduino.
Industry-standard development board: Using the Arduino UNO board in industries, there are a range of
companies using the UNO board as the brain for their PLC’s.
Education purposes: Although the UNO board has been with us for about ten years, it is still widely used for
various education purposes and scientific projects. The board's high standard and top quality performance makes
it a great resource to capture real time from sensors and to trigger complex laboratory equipment to mention a
few examples.
1.2 Related Products
Starter Kit
Tinkerkit Braccio Robot
Example
2 Ratings
2.1 Recommended Operating Conditions
Symbol Description Min Max
Conservative thermal limits for the whole board: -40 °C (-40°F) 85 °C ( 185°F)
NOTE: In extreme temperatures, EEPROM, voltage regulator, and the crystal oscillator, might not
work as expected due to the extreme temperature conditions
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2.2 Power Consumption
Symbol Description Min Typ Max Unit
VINMax Maximum input voltage from VIN pad 6 - 20 V
VUSBMax Maximum input voltage from USB connector - 5.5 V
PMax Maximum Power Consumption - - xx mA
3 Functional Overview
3.1 Board topology
Top view
Board topology
Ref. Description Ref. Description
X1 Power jack 2.1x5.5mm U1 SPX1117M3-L-5 Regulator
X2 USB B Connector U3 ATMEGA16U2 Module
PC1 EEE-1EA470WP 25V SMD Capacitor U5 LMV358LIST-A.9 IC
PC2 EEE-1EA470WP 25V SMD Capacitor F1 Chip Capacitor, High Density
D1 CGRA4007-G Rectifier ICSP Pin header connector (through hole 6)
J-ZU4 ATMEGA328P Module ICSP1 Pin header connector (through hole 6)
Y1 ECS-160-20-4X-DU Oscillator
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3.2 Processor
The Main Processor is a ATmega328P running at up tp 20 MHz. Most of its pins are connected to the external
headers, however some are reserved for internal communication with the USB Bridge coprocessor.
3.3 Power Tree
Power tree
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4 Board Operation
4.1 Getting started - IDE
If you want to program your Arduino UNO while offline you need to install the Arduino Desktop IDE [1] To connect
the Arduino UNO to your computer, you’ll need a Micro-B USB cable. This also provides power to the board, as
indicated by the LED.
4.2 Getting started - Arduino Web Editor
All Arduino boards, including this one, work out-of-the-box on the Arduino Web Editor [2], by just installing a simple
plugin.
The Arduino Web Editor is hosted online, therefore it will always be up-to-date with the latest features and support
for all boards. Follow [3] to start coding on the browser and upload your sketches onto your board.
4.3 Getting started - Arduino IoT Cloud
All Arduino IoT enabled products are supported on Arduino IoT Cloud which allows you to Log, graph and analyze
sensor data, trigger events, and automate your home or business.
4.4 Sample Sketches
Sample sketches for the Arduino XXX can be found either in the “Examples” menu in the Arduino IDE or in the
“Documentation” section of the Arduino Pro website [4]
4.5 Online Resources
Now that you have gone through the basics of what you can do with the board you can explore the endless
possibilities it provides by checking exciting projects on ProjectHub [5], the Arduino Library Reference [6] and the
online store [7] where you will be able to complement your board with sensors, actuators and more
Arduino® UNO R3
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4.6 Board Recovery
All Arduino boards have a built-in bootloader which allows flashing the board via USB. In case a sketch locks up the
processor and the board is not reachable anymore via USB it is possible to enter bootloader mode by double-
tapping the reset button right after power up.
5 Connector Pinouts
Pinout
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5.1 JANALOG
Pin Function Type Description
1 NC NC Not connected
2 IOREF IOREF Reference for digital logic V - connected to 5V
3 Reset Reset Reset
4 +3V3 Power +3V3 Power Rail
5 +5V Power +5V Power Rail
6 GND Power Ground
7 GND Power Ground
8 VIN Power Voltage Input
9 A0 Analog/GPIO Analog input 0 /GPIO
10 A1 Analog/GPIO Analog input 1 /GPIO
11 A2 Analog/GPIO Analog input 2 /GPIO
12 A3 Analog/GPIO Analog input 3 /GPIO
13 A4/SDA Analog input/I2C Analog input 4/I2C Data line
14 A5/SCL Analog input/I2C Analog input 5/I2C Clock line
5.2 JDIGITAL
Pin Function Type Description
1 D0 Digital/GPIO Digital pin 0/GPIO
2 D1 Digital/GPIO Digital pin 1/GPIO
3 D2 Digital/GPIO Digital pin 2/GPIO
4 D3 Digital/GPIO Digital pin 3/GPIO
5 D4 Digital/GPIO Digital pin 4/GPIO
6 D5 Digital/GPIO Digital pin 5/GPIO
7 D6 Digital/GPIO Digital pin 6/GPIO
8 D7 Digital/GPIO Digital pin 7/GPIO
9 D8 Digital/GPIO Digital pin 8/GPIO
10 D9 Digital/GPIO Digital pin 9/GPIO
11 SS Digital SPI Chip Select
12 MOSI Digital SPI1 Main Out Secondary In
13 MISO Digital SPI Main In Secondary Out
14 SCK Digital SPI serial clock output
15 GND Power Ground
16 AREF Digital Analog reference voltage
17 A4/SD4 Digital Analog input 4/I2C Data line (duplicated)
18 A5/SD5 Digital Analog input 5/I2C Clock line (duplicated)
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5.3 Mechanical Information
5.4 Board Outline & Mounting Holes
Board outline
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