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The Arduino Nano R4 is a compact board from the Nano family featuring a 32-bit Renesas RA4M1 microcontroller with a 48 MHz Arm Cortex-M4 core, delivering enhanced performance while maintaining 5 V logic compatibility and full integration with the existing Arduino ecosystem. The new version expands functionality with a CAN interface, a 12-bit DAC, an integrated operational amplifier, and a Qwiic connector for quick I²C module connectivity. Thanks to castellated pins and single-sided component assembly, the board is suitable for both rapid prototyping and production projects requiring integration into custom PCBs. Arduino ABX00143
The Arduino Nano R4 (ABX00143) expands the capabilities of the popular Nano form factor by integrating the Renesas RA4M1 microcontroller with a 32-bit Arm Cortex-M4 core clocked at 48 MHz. The MCU provides 256 kB of Flash memory, 32 kB of RAM, and 8 kB of EEPROM, offering significantly more space for code and data compared to earlier 8-bit-based designs. The board maintains 5 V logic compatibility, enabling direct use with classic Arduino shields, modules, and sensors without the need for additional level shifters.

The Arduino Nano R4 with pre-soldered headers (ABX00143) offers 21 digital I/O lines, all of which can function as either inputs or outputs, as well as 8 analog inputs enabling voltage measurements in sensing and control projects. The board provides 6 PWM channels, allowing precise control of motors, LEDs, and other actuators requiring signal modulation.
The board is equipped with two I²C interfaces (5 V and 3.3 V via the Qwiic connector), one SPI interface, and two serial ports (including communication over USB), ensuring flexibility when integrating displays, converters, communication modules, and measurement systems. Additionally, pins supporting external interrupts are available, enabling real-time applications that respond to hardware events.
Power can be supplied via the USB-C port or through the VIN pin with an input range of 6–21 VDC, allowing integration both in laboratory environments and in systems powered from industrial installations. Each GPIO line can source or sink up to 8 mA of current, which should be taken into account when designing peripheral circuits.
The compact dimensions of 18 × 45 mm enable installation in space-constrained devices, while the factory-soldered goldpin headers allow immediate use of the board with breadboards and adapters without additional assembly. Arduino Nano R4 maintains full software compatibility with Arduino IDE, CLI, and environments based on the UNO R4 ecosystem, simplifying migration of existing projects.


The central element of the board is the Renesas RA4M1 microcontroller (marking R7FA4M1AB3CFM visible in the photo), responsible for executing the program and handling the built-in hardware peripherals. In its immediate vicinity are the power supply circuitry, voltage stabilization components, and a resonator ensuring stable operation of the system. The compact PCB design and single-sided component placement facilitate integration into space-constrained devices.
The USB-C connector visible on the left side serves for programming and communication with a computer, enabling fast firmware uploading and data transmission. Next to it is the RESET button, which facilitates restarting the microcontroller during testing and debugging. The board features LED indicators — a classic status LED and a programmable RGB LED — allowing visual diagnostics and signaling of system operating states.
On the right side, there is a Qwiic connector for convenient connection of I²C modules operating at 3.3 V logic levels, without the need to solder wires. The dual-row, factory-soldered goldpin headers provide full access to the microcontroller’s pins and enable immediate use of the board with breadboards, adapters, and prototype constructions.
Arduino Nano R4 offers a built-in CAN bus controller, enabling integration with industrial and automotive systems (an external transceiver is required). This expands the board’s range of applications to automation, mobile robotics, and real-time communication systems based on bus topology. Additionally, the board includes a 12-bit digital-to-analog converter (DAC), allowing the generation of analog signals without external components, simplifying the design of control systems and audio applications.

The board is also equipped with a built-in operational amplifier (OPAMP), which enables basic signal conditioning functions — such as amplification, filtering, or buffering — without the need for additional analog components. Complementing this functionality is a hardware real-time clock (RTC) with battery backup support, useful in systems that log data with timestamps. The microcontroller also supports HID mode, allowing emulation of devices such as a keyboard or mouse, which is applicable in user interfaces, dedicated controllers, and interactive projects.
Data sheet
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
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