Easy-to-use hardware platform for Voice User Interface (VUI) solutions based on the RA4E1 MCU.

This VUI partner enabled solution is based on the RA family of 32-bit MCUs. The hardware platform is used for all VUI partner enabled solutions provided by Renesas within the Renesas Ready Partner Network. It demonstrates how easy it is to control your system with a simple voice command interface without extensive coding experience or in-house expertise.

You will build an enhanced working solution that recognizes your own voice commands to trigger the corresponding operation using the Renesas Partner Network Solutions utilizing the Voice Hardware Platform.


  • Hardware Features
    • Compact VUI solution using RA4E1. Small 10*10mm size to fit into end product.
    • Local voice recognition algorithm, no network connectivity needed.
    • Microphones: choices of digital and analog microphones are populated for alternative input options.
    • External QSPI flash memory enhances storage for voice samples and library data.
  • Partner Enabled Solution Features
    • Cyberon DSpotter (PDF | English, 日本語) enabled features:
      • Global language support: 40+ languages worldwide.
      • Support voice tag function to let user change command by voice recording.
      • Support voice response function for acknowledge. Enhance user experience.
      • DSMT tool: wake-word and commands customization, performance tuning, testing, no prior neural network knowledge needed.
  • Low BOM cost and footprint. Minimum requirements are the MCU, one DMIC and power supply.



  • Edge applications enabling endpoint voice user interface independent from network/cloud/edge connections.
    • IoT Devices​
    • Home Appliances​
    • Wearable/Hearable Devices


Design & Development


Supporting content such as a Board Support Package (BSP) and Quick Setup Guide (QSG) are available from the Renesas Ready Solutions Repository on GitHub.


To use Cyberon’s D-Spotter Modeling Tool (DSMT) together with this kit, please fill in and submit the following form.

Request Cyberon D-Spotter Modeling Tool

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
1 item
Voice User Interface Solution for RA MCUs

Watch for an overview of how the Renesas Voice Kits make it easy to add a Voice User Interface (VUI) in minutes using your own voice commands. Visit renesas.com/voice-recognition for all the details.