Arduino A000066

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 A000066 Specifications

General

Microcontroller	ATmega328P
Operating Voltage	5V
Input Voltage (recommended)	7-12V
Input Voltage (limit)	6-20V
Digital I/O Pins	14
PWM Digital I/O Pins / Channels	6
Analog Input Pins	6
DC Current per I/O Pin	20 mA
DC Current for 3.3V Pin	50 mA
Flash Memory	32 KB (ATmega328P) of which 0.5 KB used by bootloader
SRAM	2 KB (ATmega328P)
EEPROM	1 KB (ATmega328P)
Clock Speed	16 MHz
Length	68.6 mm
Width	53.4 mm
Weight	25 g

Summary

Functional Overview

Board Topology

Processor Details

Information on the main ATmega328P processor and its clock speed.

Power Tree Diagram

Board Operation

Getting Started with IDE

Guide on setting up the Arduino Desktop IDE for programming the UNO R3.

Getting Started with Web Editor

Board Recovery

Procedure for restoring the board's bootloader if the processor locks up.

Connector Pinouts

Analog Connector Pinout

Detailed listing of analog and general purpose I/O pins and their functions.

Digital Connector Pinout

Detailed listing of digital I/O, SPI, and I2C pins and their functions.

Mechanical Specifications

FCC Compliance and Caution