ARDUINO ABX00080 UNO R4 Minima Evolution Board User Manual
- June 17, 2024
- ARDUINO
Table of Contents
- ABX00080 UNO R4 Minima Evolution Board
- The Board
- Recommended Operating Conditions
- Block Diagram
- Board Topology
- Microcontroller (R7FA4M1AB3CFM#AA0)
- USB Connector
- Digital Analog Converter (DAC)
- Power Options
- Pinout
- Mounting Holes And Board Outline
- Board Operation
- Declaration of Conformity to EU RoHS & REACH 211 01/19/2021
- Conflict Minerals Declaration
- FCC Caution
- Company Information
- Reference Documentation
- Change Log
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
Arduino® UNO R4 Minima
Product Reference Manual
SKU: ABX00080
ABX00080 UNO R4 Minima Evolution Board
Description
The Arduino UNO R4 Minima (from here on referred to as UNO R4 Minima) is the
first UNO board to feature a 32-bit microcontroller. It features a RA4M1 series
microcontroller from Renesas (R7FA4M1AB3CFM#AA0), which embeds a 48 MHz Arm®
Cortex®-M4 microprocessor. The UNO R4’s memory is larger than its
predecessors, with 256 kB flash, 32 kB SRAM and 8 kB data memory (EEPROM).
The UNO R4 Minima board’s operating voltage is 5 V, making it hardware
compatible with UNO form factor accessories with the same operating voltage.
Shields designed for previous UNO revisions are therefore safe to use with
this board but are not guaranteed to be software compatible due to the change
of microcontroller.
Target areas:
Maker, beginner, education
Features
- R7FA4M1AB3CFM#AA0
- 48 MHz Arm® Cortex®-M4 microprocessor with a floating point unit (FPU)
- 5 V operating voltage
- Real-time Clock (RTC)
- Memory Protection Unit (MPU)
- Digital Analog Converter (DAC)
- Memory
- 256 kB Flash Memory
- 32 kB SRAM
- 8 kB Data Memory (EEPROM)
- Pins
- 14x digital pins (GPIO), D0-D13
- 6x analog input pins (ADC), A0-A5
- 6x PWM pins: D3,D5,D6,D9,D10,D11
- Peripherals
- Capacitive Touch Sensing Unit (CTSU)
- USB 2.0 Full-Speed Module (USBFS)
- up to 14-bit ADC
- up to 12-bit DAC
- Operational Amplifier (OPAMP)
- Power
- Recommended input voltage (VIN) is 6-24 V
- 5 V operating voltage
- Barrel jack connected to VIN pin
- Power via USB-C® at 5 V
- Schottky diodes for overvoltage and reverse polarity protection
- Communication
- 1x UART (pin D0, D1)
- 1x SPI (pin D10-D13, ICSP header)
- 1x I2C (pin A4, A5, SDA, SCL)
- 1x CAN (pin D4, D5, external transceiver is required)
The Board
1.1 Application Examples
The UNO R4 Minima is the first UNO series 32-bit development board, being
previously based on 8-bit AVR microcontrollers. There are thousands of guides,
tutorials and books written about the UNO board, where UNO R4 Minima continues
its legacy.
The board features the standard 14 digital I/O ports, 6 analog channels,
dedicated pins for I2C, SPI and UART connections. Compared to its predecessors
the board has a much larger memory: 8 times more flash memory (256 kB) and 16
times more SRAM (32 kB).
Entry level projects: If this is your first project within coding and
electronics, the UNO R4 Minima is a good fit. It is easy to get started with
and has a lot of online documentation (both official + 3rd party).
Easy power management: the UNO R4 Minima has a barrel jack connector and
supports input voltages from 6-24 V. This connector is widely popular and
removes the need for additional circuitry required to step down the voltage.
Cross compatibility: the UNO form factor automatically makes it compatible
with hundreds of existing third-party shields and other accessories.
1.2 Related Products
- UNO R3
- UNO R3 SMD
- UNO R4 WiFi
Rating
Recommended Operating Conditions
| Symbol | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VIN | Input voltage from VIN pad / DC Jack | 6 | 7 | 24 | V |
| VUSB | Input voltage from USB connector | 4.8 | 5 | 5.5 | V |
| TOP | Operating Temperature | -40 | 25 | 85 | °C |
Functional Overview
Block Diagram
Board Topology
4.1 Front View
| Ref. | Description | Ref. | Description |
|---|---|---|---|
| U1 | R7FA4M1AB3CFM#AA0 Microcontroller IC | J4 | DC Jack |
| U2 | ISL854102FRZ-T Buck Converter | DL1 | LED TX (serial transmit) |
| PB1 | RESET Button | DL2 | LED RX (serial receive) |
| JANALOG | Analog input/output headers | DL3 | LED Power |
| JDIGITAL | Digital input/output headers | DL4 | LED SCK (serial clock) |
| J1 | ICSP header (SPI) | D2 | PMEG6020AELRX Schottky Diode |
| J2 | SWD/JTAG Connector | D3 | PMEG6020AELRX Schottky Diode |
| J3 | CX90B-16P USB-C® connector | D4 | PRTR5V0U2X,215 ESD Protection |
4.2 Back View
Microcontroller (R7FA4M1AB3CFM#AA0)
The UNO R4 Minima is based on the 32-bit RA4M1 series microcontroller,
R7FA4M1AB3CFM#AA0, from Renesas, which uses a 48 MHz Arm® Cortex®-M4
microprocessor with a floating point unit (FPU).
On the UNO R4 Minima, the operating voltage is fixed at 5 V to be fully retro
compatible with shields, accessories & circuits originally designed for older
UNO revisions.
The R7FA4M1AB3CFM#AA0 features:
- 256 kB flash / 32 kB SRAM / 8 kB data flash (EEPROM)
- Real-time Clock (RTC)
- 4x Direct Memory Access Controller (DMAC)
- up to 14-bit ADC
- up to 12-bit DAC
- OPAMP
- 1x CAN bus
For more technical details on this microcontroller, visit Renesas – RA4M1 series.
USB Connector
The UNO R4 Minima has one USB-C® port, used to power and program your board as
well as send & receive serial communication.
Note: You should not power the board with more than 5 V via the USB-C® port.
Digital Analog Converter (DAC)
The UNO R4 Minima has a DAC with up to 12-bit resolution attached to the A0 analog pin. A DAC is used to convert a digital signal to an analog signal.
Power Options
Power can either be supplied via the VIN pin, the barrel jack, or via USB-C®
connector. If power is supplied via VIN, the ISL854102FRZ buck converter steps
the voltage down to 5 V.
The VUSB, barrel jack connector and VIN pins are connected to the ISL854102FRZ
buck converter, with Schottky diodes in place for reverse polarity &
overvoltage protection respectively.
Power via USB supplies about ~4.7 V (due to Schottky drop) to the RA4M1
microcontroller.
8.1 Power Tree
8.2 Pin Voltage
The UNO R4 Minima operates on 5 V, as does all pins on this board except for
the 3.3V pin. This pin draws power from the VCC_USB pin on the
R7FA4M1AB3CFM#AA0, and is not connected to the buck converter.
8.3 Pin Current
The GPIOs on the R7FA4M1AB3CFM#AA0 microcontroller can handle up to 8 mA.
Never connect devices that draw higher current directly to a GPIO.
In case you need to power external devices that require more power, e.g. servo
motors, use an external power supply.
Mechanical Information
Pinout
9.1 Analog
| Pin | Function | Type | Description |
|---|---|---|---|
| 1 | BOOT | MD | Mode selection |
| 2 | IOREF | IOREF | Reference for digital logic V – connected to 5 V |
| 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 | Analog input 0 / DAC |
| 10 | A1 | Analog | Analog input 1 / OPAMP+ |
| 11 | A2 | Analog | Analog input 2 / OPAMP- |
| 12 | A3 | Analog | Analog input 3 / OPAMPOut |
| 13 | A4 | Analog | Analog input 4 / I²C Serial Datal (SDA) |
| 14 | A5 | Analog | Analog input 5 / I²C Serial Clock (SCL) |
9.2 Digital
| Pin | Function | Type | Description |
|---|---|---|---|
| 1 | SCL | Digital | I²C Serial Clock (SCL) |
| 2 | SDA | Digital | I²C Serial Datal (SDA) |
| 3 | AREF | Digital | Analog Reference Voltage |
| 4 | GND | Power | Ground |
| 5 | D13/SCK | Digital | GPIO 13 / SPI Clock |
| 6 | D12/CIPO | Digital | GPIO 12 / SPI Controller In Peripheral Out |
| 7 | D11/COPI | Digital | GPIO 11 (PWM) / SPI Controller Out Peripheral In |
| 8 | D10/CS | Digital | GPIO 10 (PWM) / SPI Chip Select |
| 9 | D9 | Digital | GPIO 9 (PWM~) |
| 10 | D8 | Digital | GPIO 8 |
| 11 | D7 | Digital | GPIO 7 |
| 12 | D6 | Digital | GPIO 6 (PWM~) |
| 13 | D5/CANRX0 | Digital | GPIO 5 (PWM~) / CAN Transmitter (TX) |
| 14 | D4/CANTX0 | Digital | GPIO 4 / CAN Receiver (RX) |
| 15 | D3 | Digital | GPIO 3 (PWM~) / Interrupt Pin |
| 16 | D2 | Digital | GPIO 2 / Interrupt Pin |
| 17 | D1/TX0 | Digital | GPIO 1 / Serial 0 Transmitter (TX) |
| 18 | D0/TX0 | Digital | GPIO 0 / Serial 0 Receiver (RX) |
9.3 ICSP
| Pin | Function | Type | Description |
|---|---|---|---|
| 1 | CIPO | Internal | Controller In Peripheral Out |
| 2 | +5V | Internal | Power Supply of 5 V |
| 3 | SCK | Internal | Serial Clock |
| 4 | COPI | Internal | Controller Out Peripheral In |
| 5 | RESET | Internal | Reset |
| 6 | GND | Internal | Ground |
9.4 SWD/JTAG
| Pin | Function | Type | Description |
|---|---|---|---|
| 1 | +5V | Internal | Power Supply of 5 V |
| 2 | SWDIO | Internal | Data I/O pin |
| 3 | GND | Internal | Ground |
| 4 | SWCLK | Internal | Clock Pin |
| 5 | GND | Internal | Ground |
| 6 | NC | Internal | Not connected |
| 7 | RX | Internal | Serial Receiver |
| 8 | TX | Internal | Serial Transmitter |
| 9 | GND | Internal | Ground |
| 10 | NC | Internal | Not connected |
Mounting Holes And Board Outline
Board Operation
11.1 Getting Started – IDE
If you want to program your UNO R4 Minima while offline you need to install the
Arduino® Desktop IDE [1]. To connect the UNO R4 Minima to your computer, you
will need a Type-C® USB cable, which can also provide power to the board, as
indicated by the LED (DL1).
11.2 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 sketches onto your board.
11.3 Getting Started – Arduino Cloud
All Arduino IoT enabled products are supported on Arduino Cloud which allows
you to log, graph and analyze sensor data, trigger events, and automate your
home or business.
11.4 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 Arduino Project Hub [4], the Arduino Library Reference [5], and
the online store [6]; where you will be able to complement your board with
sensors, actuators and more.
11.5 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
doubletapping the reset button right after the power-up.
Certifications
12 Declaration of Conformity CE DoC (EU)
We declare under our sole responsibility that the products above are in
conformity with the essential requirements of the following EU Directives and
therefore qualify for free movement within markets comprising the European
Union (EU) and European Economic Area (EEA).
Declaration of Conformity to EU RoHS & REACH 211 01/19/2021
Arduino boards are in compliance with RoHS 2 Directive 2011/65/EU of the European Parliament and RoHS 3 Directive 2015/863/EU of the Council of 4 June 2015 on the restriction of the use of certain hazardous substances in electrical and electronic equipment.
| Substance | Maximum Limit (ppm) |
|---|---|
| Lead (Pb) | 1000 |
| Cadmium (Cd) | 100 |
| Mercury (Hg) | 1000 |
| Hexavalent Chromium (Cr6+) | 1000 |
| Poly Brominated Biphenyls (PBB) | 1000 |
| Poly Brominated Diphenyl ethers (PBDE) | 1000 |
| Bis(2-Ethylhexyl} phthalate (DEHP) | 1000 |
| Benzyl butyl phthalate (BBP) | 1000 |
| Dibutyl phthalate (DBP) | 1000 |
| Diisobutyl phthalate (DIBP) | 1000 |
Exemptions : No exemptions are claimed.
Arduino Boards are fully compliant with the related requirements of European
Union Regulation (EC) 1907 /2006 concerning the Registration, Evaluation,
Authorization and Restriction of Chemicals (REACH). We declare none of the
SVHCs (<https://echa.europa.eu/web/guest/candidate-list-
table), the
Candidate List of Substances of Very High Concern for authorization currently
released by ECHA, is present in all products (and also ackage) in quantities
totaling in a concentration equal or above 0.1%. To the best of our knowledge,
we also declare that our products do not contain any of the substances listed
on the “Authorization List” (Annex XIV of the REACH regulations) and
Substances of Very High Concern (SVHC) in any significant amounts as specified
by the Annex XVII of Candidate list published by ECHA (European Chemical
Agency) 1907 /2006/EC.
Conflict Minerals Declaration
As a global supplier of electronic and electrical components, Arduino is aware of our obligations with regards to laws and regulations regarding Conflict Minerals, specifically the Dodd-Frank Wall Street Reform and Consumer Protection Act, Section 1502. Arduino does not directly source or process conflict minerals such as Tin, Tantalum, Tungsten, or Gold. Conflict minerals are contained in our products in the form of solder, or as a component in metal alloys. As part of our reasonable due diligence Arduino has contacted component suppliers within our supply chain to verify their continued compliance with the regulations. Based on the information received thus far we declare that our products contain Conflict Minerals sourced from conflict-free areas.
FCC Caution
Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference
- this device must accept any interference received, including interference that may cause undesired operation.
FCC RF Radiation Exposure Statement:
- This Transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
- This equipment complies with RF radiation exposure limits set forth for an uncontrolled environment.
- This equipment should be installed and operated with a minimum distance of 20 cm between the radiator & your body.
User manuals for licence-exempt radio apparatus shall contain the following or equivalent notice in a conspicuous location in the user manual or alternatively on the device or both. This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions:
- this device may not cause interference
- this device must accept any interference, including interference that may cause undesired operation of the device.
IC SAR Warning:
English This equipment should be installed and operated with a minimum
distance of 20 cm between the radiator and your body.
Important: The operating temperature of the EUT can’t exceed 85 ℃ and
shouldn’t be lower than -40 ℃.
Hereby, Arduino S.r.l. declares that this product is in compliance with
essential requirements and other relevant provisions of Directive 201453/EU.
This product is allowed to be used in all EU member states.
Company Information
| Company name | Arduino SRL |
|---|---|
| Company Address | Via Andrea Appiani, 25 – 20900 MONZAItaly) |
Reference Documentation
| Ref | Link |
|---|---|
| Arduino IDE (Desktop) | https://www.arduino.cc/en/Main/Software |
| Arduino IDE (Cloud) | https://create.arduino.cc/editor |
| Cloud IDE Getting Started | <https://docs.arduino.cc/cloud/web-editor/tutorials |
/getting-started/getting-started-webeditor>
Arduino Project Hub|
https://create.arduino.cc/projecthub?by=part&part_id=11332&sort=trending
Library Reference| https://github.com/arduino-libraries/
Online Store| https://store.arduino.cc/
Change Log
| Date | Revision | Changes |
|---|---|---|
| 25/07/2023 | 2 | Update Pin Table |
| 6/19/2023 | 1 | First Release |
Arduino® UNO R4 Minima
Modified: 22/01/2024
References
- Arduino Project Hub
- docs.arduino.cc/cloud/web-editor/tutorials/getting-started/getting-started-web-editor
- Arduino Libraries · GitHub
- Arduino Official Store | Boards Shields Kits Accessories
- Software | Arduino
- RA4M1 - 32-bit Microcontrollers with 48MHz Arm® Cortex®-M4 and LCD Controller and Cap Touch for HMI | Renesas