# Arduino Nano R4

> The newest Arduino Nano — Renesas RA4M1 ARM Cortex-M4F at 48MHz with 256KB flash, 32KB SRAM, Qwiic connector, RGB LED, castellated pins, and USB-C in an ultra-compact 43×17mm form factor. No wireless, pure embedded power.

## Quick Facts

- **Brand:** Arduino
- **Board Type:** dev-board
- **Price:** ~$12.2
- **Product Readiness:** consumer
- **CPU:** ARM Cortex-M4F @ 48MHz, FPU, DSP
- **CPU Architecture:** ARM Cortex-M4F
- **CPU Cores:** 1
- **RAM:** 32KB SRAM
- **Flash:** 256KB,8KB EEPROM
- **USB:** USB-C 2.0 (Full-Speed)
- **Power:** 5V via USB-C or Vin
- **Operating Voltage:** 5V
- **Dimensions:** 43 × 17mm
- **Weight:** 5g
- **Antenna:** No
- **SD Card:** No

## Open Source

- **Firmware:** Yes
- **Schematics:** Yes
- **PCB Layout:** No

## Compatible Firmware

arduino, micropython

## Use Cases

- educational-platform
- iot
- industrial-iot

## Components

- **R7FA4M1AB3CFM** (mcu): Renesas RA4M1 ARM Cortex-M4F at 48MHz with FPU, DSP, 256KB flash, 32KB SRAM, 14-bit ADC, 12-bit DAC, CAN 2.0B. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2Fra4m1-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-r4&source=md-export)

## Protocols

- **SPI**: MOSI: D11, MISO: D12, SCK: D13, SS: D10
- **I2C**: SDA: A4, SCL: A5
- **UART**: TX: D1, RX: D0
- **CAN**: CANRX: D4, CANTX: D5

## GPIO Map

| Pin | Name | Type | Functions |
|-----|------|------|-----------|
| D0 | UART RX | UART | digital-input, digital-output |
| D1 | UART TX | UART | digital-input, digital-output |
| D2 | Digital I/O |  | digital-input, digital-output |
| D3 | PWM | PWM | digital-input, digital-output, pwm |
| D4 | CAN RX | CAN | digital-input, digital-output |
| D5 | CAN TX / PWM | CAN | digital-input, digital-output, pwm |
| D6 | PWM | PWM | digital-input, digital-output, pwm |
| D7 | Digital I/O |  | digital-input, digital-output |
| D8 | Digital I/O |  | digital-input, digital-output |
| D9 | PWM | PWM | digital-input, digital-output, pwm |
| D10 | SPI SS / PWM | SPI | digital-input, digital-output, pwm |
| D11 | SPI MOSI / PWM | SPI | digital-input, digital-output, pwm |
| D12 | SPI MISO | SPI | digital-input, digital-output |
| D13 | SPI SCK | SPI | digital-input, digital-output |
| A0 | Analog / DAC | ADC | digital-input, digital-output, adc, dac |
| A1 | Analog Input | ADC | digital-input, digital-output, adc |
| A2 | Analog Input | ADC | digital-input, digital-output, adc |
| A3 | Analog Input | ADC | digital-input, digital-output, adc |
| A4 | I2C SDA / Analog | I2C | digital-input, digital-output, adc |
| A5 | I2C SCL / Analog | I2C | digital-input, digital-output, adc |

## Description

## Overview

The Arduino Nano R4 is the latest addition to the Nano family, bringing the same Renesas RA4M1 ARM Cortex-M4F processor from the UNO R4 series into the smallest Arduino form factor yet at 43×17mm. With 256KB flash, 32KB SRAM, a 12-bit DAC, CAN bus, and on-chip op-amp, it delivers modern 32-bit ARM processing in a board designed for integration.

Key design features include castellated pins for direct surface-mount soldering onto custom PCBs, single-sided component placement for easy reflow, a built-in Qwiic/STEMMA QT connector for sensor daisy-chaining, and a programmable RGB LED. USB-C provides power and programming.

The Nano R4 is ideal for production-ready embedded applications where the full UNO R4 is too large, and for makers who want the latest ARM Cortex-M4F processing without wireless overhead. It maintains compatibility with the Arduino IDE and the growing RA4M1 library ecosystem.

## Where to Buy

- [Arduino Store (US)](https://openhardware.directory/r?to=https%3A%2F%2Fstore-usa.arduino.cc%2Fproducts%2Fnano-r4&ref=openhardware.directory&product=arduino-nano-r4&source=md-export) — $12.20
- [Arduino Store (EU)](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-r4&ref=openhardware.directory&product=arduino-nano-r4&source=md-export) — €13.40
- [DigiKey](https://openhardware.directory/r?to=https%3A%2F%2Fwww.digikey.com%2Fen%2Fproducts%2Fdetail%2Farduino%2FABX00142%2F25828340&ref=openhardware.directory&product=arduino-nano-r4&source=md-export) — $14.00
- [Mouser](https://openhardware.directory/r?to=https%3A%2F%2Fwww.mouser.com%2FProductDetail%2FArduino%2FABX00142&ref=openhardware.directory&product=arduino-nano-r4&source=md-export) — $14.00

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fstore.arduino.cc%2Fproducts%2Fnano-r4&ref=openhardware.directory&product=arduino-nano-r4&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fhardware%2Fnano-r4%2F&ref=openhardware.directory&product=arduino-nano-r4&source=md-export)
- [datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fdocs.arduino.cc%2Fresources%2Fdatasheets%2FABX00142-datasheet.pdf&ref=openhardware.directory&product=arduino-nano-r4&source=md-export)

## Tags

`arduino`, `nano`, `r4`, `renesas`, `arm-cortex-m4`, `qwiic`, `usb-c`, `castellated`

## Images

![Arduino Nano R4](https://nbg1.your-objectstorage.com/openhardware-directory/entities/arduino-nano-r4/fb249f81b2ee.jpg)
![Arduino Nano R4](https://nbg1.your-objectstorage.com/openhardware-directory/entities/arduino-nano-r4/8d2a322bf5cb.jpg)

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