The EK-RA4W1 evaluation kit enables users to effortlessly evaluate the features of the RA4W1 MCU Group and develop embedded systems applications using Renesas' Flexible Software Package (FSP) and various IDEs.

Getting Started

Running the Quick Start Example Project

  1. Power up the EK-RA4W1 board through the USB debug port (J11) using the micro USB device cable connected to a 5V power source. The green power LED will light up.
  2. The Quick Start example project will begin to execute blinking the red user LED.
  3. Refer to the EK-RA4W1 – Quick Start Guide (ZIP) to explore additional functionality of the Quick Start example project.

Developing Embedded Applications

  1. Modifying the Quick Start example project – Refer to the EK-RA4W1 Quick Start Guide for instructions on importing, modifying and building the Quick Start example project.
  2. Start with one of the many other example projects – Choose from many example projects to learn about different peripherals of the RA4W1 MCU group. These example projects can serve as excellent starting points for you to develop your custom applications.

Building Custom Hardware

  1. Start by building a functional prototype - Utilize the EK-RA4W1 board with your choice of ecosystem add-ons.
  2. Build custom hardware – Develop custom hardware by referring to the design and manufacturing information provided in the EK-RA4W1 design package.


  • MCU Native Pin Access
    • 48MHz, Arm Cortex®-M4 core
    • 512kB Code Flash, 96kB SRAM
    • 56 pins, QFN package
    • MCU headers: 28 pins x2
    • MCU current measurement points
  • Ecosystem & System Control Access
    • USB Full Speed device
    • 5V input through USB debug
    • Debug on-board (Segger J-Link®)
    • One Digilent PmodTM (SPI)
    • User LED
    • Mechanical user button
    • MCU boot configuration jumper
    • ArduinoTM UNO connector
  • Kit Contents: EK-RA4W1 board



Design & Development

Software & Tools

Software & Tools

Software title
Software type
Flexible Software Package (FSP)
FSP is an enhanced software package designed to provide easy-to-use, scalable, high-quality software for embedded system designs using Renesas RA Family of Arm Microcontrollers. Note: FSP with e² studio Installer (Platform Installer) will install the e² studio tool, FSP packs, GCC toolchain, and Segger J-Link drivers required to use this software. No additional installations are required.
Software Package Renesas
Renesas Flash Programmer (Programming GUI)
Flash memory programming software [Support MCU/MPU and devices: RA, RE, RX, RL78, RH850, RISC-V MCU Renesas Synergy, DA1459x, DA1469x, DA1470x, Power Management, Renesas USB Power Delivery Family, ICs for Motor Driver/Actuator Driver, V850, 78K0R, 78K0]
Programmer (Unit/SW) Renesas
Quick-Connect Platform
Quick-Connect platform enables fast prototyping by providing compatible hardware and software building blocks.
Other Hardware Renesas
3 items

Sample Code

Introducing the Renesas RA Family of 32-Bit Microcontrollers

The Renesas RA Family of 32-bit MCUs is designed to help device developers create the next generation of secure IoT devices. They are low power, have a wide variety of peripherals and connectivity options, and sport the latest HMI to help end customers have an immersive experience.


The EK-RA4W1 kit meets several certifications/standards. Refer to the for the disclaimer, precautions and details on the certifications.