Arduino UNO R4 Minima

Arduino
SKU: TH0735 MPN: ABX00080
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The Arduino UNO R4 Minima is a powerful upgrade to the classic UNO board, featuring a 32-bit microcontroller for faster processing and more memory. It maintains compatibility with existing shields and offers built-in features like a DAC and RTC, making it ideal for both beginners and experienced makers.

Features

  • Renesas RA4M1 Arm® Cortex®-M4 microprocessor @ 48MHz with a floating point unit (FPU) @ 5V operating voltage
  • Real-time Clock (RTC)
  • Memory Protection Unit (MPU)
  • Digital Analog Converter (DAC)
  • 256 KB Flash
  • 32 KB SRAM
  • 14-bit ADC
  • 12-bit DAC

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Overview

The Arduino UNO R4 Minima is a latest new upgrade to the popular and world famous Arduino UNO R3 board. UNO R4 has the same form factor as the UNO R3 measuring 68.58 x 53.34 mm in dimensions. UNO R4 Minima comes with a Renesas RA4M1 (Arm® Cortex®-M4) a 32-bit microprocessor clocked at 48 MHz, expanded menory with 32kB of SRAM and 256kB of flash memory and supports 5V operating voltage.

Apart from the improved performance and expanded memory, it has an onboard RTC (Real Time Clock), DAC (Digital to Analog Converter), 14-bit ADC (Analog to Digital Converter), OPAMP (Operational Amplifier) and a MPU (Memory Protection Unit). All these features eliminate the need for additional components in projects, simplifying the design process.

The UNO R4 Minima's user-friendly design makes it easy to learn for beginners, while its powerful features provide ample room for experienced users to explore more complex projects. Whether you're building a sophisticated robot with advanced motor control or developing a data logger that captures and analyzes intricate sensor readings, the UNO R4 Minima has the power and memory to handle your project's needs.

Features

Microprocessor
  • Renesas RA4M1 Arm® Cortex®-M4 microprocessor @ 48MHz with a floating point unit (FPU) @ 5V operating voltage
  • Real-time Clock (RTC)
  • Memory Protection Unit (MPU)
  • Digital Analog Converter (DAC)
Memory
  • 256 KB Flash
  • 32 KB SRAM
  • 8 KB 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
  • USB 2.0 Full Speed Module
  • 14-bit ADC
  • 12-bit DAC
  • Operational Amplifier (OPAMP)
Power
  • 6 to 24V Recommended Voltage
  • 5V Operating Voltage
  • Power via USB-C @ 5V
  • Overvoltage and Reverse Polarity Portection with Schottky Diodes

Specification

Microcontroller Renesas RA4M1 (Arm® Cortex®-M4)
USB USB-C®
Pins 14x Digital I/O Pins
6x Analog Input Pins
1x DAC
6x PWM Pins
Communication 1x USB (Programming Port)
1x UART
1x I2C
1x SPI
1x CAN Bus
Input Voltage 6 to 24V
Operating Voltage 5V
Current per I/O Pin 8mA
Clock Speed 48 MHz
Memory 256 KB Flash
32 KB SRAM
8 KB EEPROM
Dimensions 68.58 x 53.34 mm 
Arduino UNO R4 Mechanical Drawing

Pinout

Pinout for Arduino UNO R4 Minima

Arduino UNO R4 Pinout
Power
Pin Function   Description
Analog Side
4 +3V3   +3V3 Output Power Rail
5 +5V   +5V Output Power Rail
6 GND   Ground
7 GND   Ground
8 VIN   Voltage Input
Digital Side
4 GND   Ground

Analog
Pin Function   Description
9 A0   Analog Input 0 / DAC
10 A1   Analog Input 1 / OPAMP+
11 A2   Analog Input 2 / OPAMP-
12 A3   Analog Input 3 / OPAMP Out
13 A4 / D18   Analog Input 4 / SDA
14 A5 / D19   Analog Input 5 / SCL

Digital
Pin Function   Description
1 SCL / D19   I2C Serial Clock
2 SDA / D18   I2C Serial Data
3 AREF   Analog Reference Voltage
5 D13 / SCK   GPIO13 / SPI Clock
6 D12 / CIPO   GPIO12 / SPI Controller In Peripheral Out
7 D11 / COPI   GPIO11 / SPI Controller Out Peripheral In
8 D10 / CS   GPIO 10 / SPI Chip Select
9 D9   GPIO 9 (PWM ~)
10 D8   GPIO 8
11 D7   GPIO 7
12 D6   GPIO 6 (PWM ~)
13 D5 / CANRX0   GPIO 5 (PWM ~) / CAN Transmitter (TX)
14 D4 / CANTX0   GPIO 4 / CAN Receiver (RX)
15 D3   GPIO 3 (PWM ~) / Interrupt Pin
16 D2   GPIO 2 / Interrupt Pin
17 D1 / TX0   GPIO 1 / Serial 0 Transmitter (TX)
18 D0 / RX0   GPIO 0 / Serial 0 Receiver (RX)

ICSP Header

Pinout and pin position for ICSP Header

  RESET   SCK   CIPO
  GND   COPI   +5V

SWD/JTAG Header

Pinout and pin position for SWD/JTAG Header

  SWDIO   SWCLK   NC   TX 10 RESET
  +5V   GND   GND   RX   GND

Arduino UNO R4 vs UNO R3

Let's compare the all new UNO R4 and the world famous UNO R3.

  UNO R4 Minima
New!
UNO R3
Microcontroller Renesas RA4M1 (Arm® Cortex®-M4) ATmega328P (8-bit AVR® RISC-based microcontroller)
USB USB-C® USB B Connector
Pins 14x Digital I/O Pins
6x Analog Input Pins
1x DAC
6x PWM Pins
14x Digital I/O Pins
6x Analog Input Pins
6x PWM Pins
Communication 1x USB (Programming Port)
1x UART
1x I2C
1x SPI
1x CAN Bus
1x USB (Programming Port)
1x UART
1x I2C
1x SPI
Input Voltage 6 to 24V 7 to 12V (Recommended)
6 to 20V (limit)
Operating Voltage 5V 5V
Current per I/O Pin 8mA 20mA
Clock Speed 48 MHz 16 MHz
Memory 256 KB Flash
32 KB SRAM
8 KB EEPROM
32 KB Flash
2 KB SRAM
1 KB EEPROM
Dimensions 68.58 x 53.34 mm  68.58 x 53.34 mm 

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