UNO R4 Minima-board

UNO R4 Minima

The Arduino UNO R4 Minima is the first UNO board featuring a 32-bit microcontroller, the RA4M1 from Renesas. It is faster, has more memory and has a number of built-in features such as a DAC, RTC and HID. The UNO R4 Minima is a 5 V only board.

GET STARTED
pinout
DATASHEET

The UNO R4 Minima features a microcontroller based on the Renesas RA4M1 (Arm® Cortex®-M4) with an operating voltage of 5 V. It has 14 digital I/O, 6 analog inputs with up to 14-bit resolution, a clock speed of 48 MHz, and 32 kB SRAM, 256 kB flash memory & 8 kB of EEPROM.

It features a DAC for audio projects, RTC for accurate time tracking and HID for emulating a keyboard/mouse. The barrel jack plug (VIN) supports voltages at up to 24V, making it compatible with common higher voltage adapters.

UNO Form Factor
Cheat Sheet
A reference to all technical features on this board, with pointers to additional documents.
Cheat Sheet
USB
USB-C
The UNO R4 Minima is the first UNO to feature a USB-C® connector.
Microcontroller
Real-Time Clock (RTC)
Keep track of time & date and set alarms with the built-in RTC.
Documentation
Microcontroller
Digital-to-Analog Converter (DAC)
Use the onboard 12-bit DAC to build sophisticated audio projects.
Documentation
USB
Mouse/Keyboard Emulation (HID)
Build game controllers by emulating a mouse/keyboard.
Documentation
Power
Power up to 24 V
Power your UNO R4 Minima board through the VIN Pin with any voltage between 6-24 V.
Communication
CAN Bus
Connect your board to other CAN devices. This requires an external transceiver.
Documentation
Pressure Sensor
ADC Resolution
This board supports analog read resolutions at up to 14-bit.
Documentation

Essentials

First Steps

Quickstart Guide
All you need to know to get started with your new Arduino board.

Suggested Libraries

Wire
This library allows you to communicate with I2C / TWI devices.
SPI
The SPI library allows you to communicate with SPI devices, with the Arduino board as the controller device.
Servo
The Servo library allows an Arduino board to control RC (hobby) servo motors.

Arduino Basics

Built-in Examples
Built-in Examples are sketches included in the Arduino IDE and demonstrate all basic Arduino commands.
Learn
Discover interesting articles, principles and techniques related to the Arduino ecosystem.
Language References
Arduino programming language can be divided in three main parts: functions, values (variables and constants), and structure.

Tutorials

Arduino UNO R4 Minima ADC Resolution

Learn how to change the ADC resolution on the UNO R4 Minima.

ADC
14-bit
Arduino UNO R4 Minima CAN Bus

Learn how to send messages using the CAN bus on the UNO R4 Minima.

CAN
Arduino UNO R4 Minima Cheat Sheet

Learn how to set up the UNO R4 Minima, the fourth revision of our most popular and important development board.

Installation
I2C
SPI
UART
JTAG
DAC
Arduino UNO R4 Minima Digital-to-Analog Converter (DAC)

Learn how create waveforms and output them on a piezo, using the DAC on the UNO R4 Minima board.

Waveform Generation
Analog
DAC
Debugging the Arduino UNO R4 Minima

Learn how to debug the UNO R4 Minima.

Debugger
J-Link®
Segger® Ozone
Arduino UNO R4 Minima EEPROM

Learn how to access the EEPROM memory on the UNO R4 Minima.

EEPROM
Getting Started with Arduino UNO R4 Minima

A step-by-step guide to install the board package needed for the UNO R4 Minima board.

UNO R4 Minima
Installation
IDE
Arduino UNO R4 Minima Real-Time Clock

Learn how to access the real-time clock (RTC) on the UNO R4 Minima.

RTC
Alarm
Arduino UNO R4 Shield Compatibility

This article covers popular shields and their compatibility including the libraries used.

shields
compatibility
UNO R4 Minima
UNO R4 WiFi
Arduino UNO R4 Shield Guide

This article covers the basic steps for developing your own shield for the Arduino UNO R4 Minima and the UNO R4 WiFi.

Shields
Arduino UNO R4 Minima
Arduino UNO R4 WiFi
Arduino UNO R4 Minima USB HID

Learn how to use the UNO R4 Minima as a mouse/keyboard.

USB
HID
Keyboard
Mouse

Resources

Interactive Viewer

Interact with the schematics, the PCB and a 3D model of the product.

Open Viewer

Pinout Diagram

A diagram showing the functions and the arrangement of the pins on your product.

Open Diagram
Downloads
Datasheet
Full Pinout
Schematics
CAD Files