Bluetooth® Low Energy for RX Family

Bluetooth® Low Energy

Bluetooth® Low Energy Wireless Solution to Accelerate Realization of IoT of Embedded Devices

Supports the full functionality of Bluetooth® 5, realizing system control and
wireless communication on a single chip

Renesas Electronics provide the "RX23W solution" that built-in security functions essential for Bluetooth® 5.0 LE and IoT devices, as well as a wealth of peripheral functions such as touch keys, USB and CAN, and realizes system control of devices and wireless communication on a single chip.

The RX23W supports full features such as the Long Range and Mesh Network of Bluetooth 5.0 LE. By supporting "Channel Selection Algorithm #2", it is more resistant to interference from other 2.4GHz RF signals and realizes stable communication even in environments with radio interference.


Chip (RL78/G1D)


Chip (RL78/G1D)

The RX23W incorporates a dedicated to Bluetooth high-precision low-speed on-chip oscillator, eliminating the need for external matching circuits and external capacitors.

RX23W Group User’s Manual: Hardware


Development Environment

Target Board for RX23W

Target Board for RX23W incorporates an emulator circuit, you can use it for your own application design without the need for further tool investments. This product provides through-holes for pin headers that allow access to all MCU signal pins, allowing an easy prototyping with a breadboard. You can begin evaluation immediately after purchasing of evaluation board using software which can be downloaded from the website.

This Evaluation Board is best suited for the following purposes.

  • Evaluation of Renesas's device (RX23W)
  • Evaluation of Bluetooth LE functions and performance
  • Use for customer's principle prototype


Bluetooth® Low Energy Protocol Stack for RX family

The Bluetooth Low Energy protocol stack is the software required to operate the RX23W and is confirming to the Bluetooth v5.0 specification. All LE functions of Core Specification v5.0 can be supported. In addition, three types of libraries are provided depending on the function set, so that a configuration suitable for the specifications of the end product can be selected.

Bluetooth qualified 56 types (as of December 2019) standard Profiles/Services are available. Among them, the Mesh profile is provided as a dedicated library "Bluetooth Mesh Package", so please use to develop products that conform to the Bluetooth Mesh Networking specification.

We offer Bluetooth LE software solutions corresponding to a wide variety of application development. For more information, please see "Software Details".


QE for BLE [RX]

The QE for BLE is a dedicated tool for developing embedded software in systems which support the Bluetooth low energy protocol stack. This solution toolkit runs in the e² studio integrated development environment. The combination of the e² studio and QE for BLE makes it easy to test the communications features of Renesas Bluetooth LE microcomputer RX23W, thus reducing development periods up to products being placed on the market. The standard profiles are generated from this tool. It can also design and generate the custom profile.


Windows application "BTTS"

In the "Survey/Evaluation" phase of the development process, It can be understand new LE functions, API execution procedures, and parameters of API by evaluating the functions and performance of Bluetooth LE supported by the RX23W using BTTS (Bluetooth Test Tool Suite).
In the "certification" phase of the device, it can be used as a GUI tool to operate the device under test (DUT) in the Radio Law certification test.



Application Note/Sample Code

Application notes are available for each hardware development process.

Principle Prototype/Evaluation

Differences Between the RX23W Group and the RX231 Group Download


RX23W Group Guidelines for Bluetooth Board Design Download
RX23W Group Tuning procedure of Bluetooth dedicated clock frequency Download
RX Family Hardware Design Guide Download
Bluetooth® Low Energy microcomputer Design Guidelines for a Pattern Antenna Download

Certification of the Radio Law

RX23W Group Testing for Certification of Compliance with the Radio Law (Japan) Download

Certification of Bluetooth SIG

BLE microcomputer / module Bluetooth qualification acquisition Download


In preparation



Introduction of Partners

Renesas Electronics, together with our partners, will strongly support the development of your Bluetooth Low Energy application.

Silex Technology, Inc.

<Contact information>


Microcomputer module SX-23BT compatible with Bluetooth5.0LE mounted in RX23W is for sale.


  • Obtained Radio Law Certification in Japan, United States, Canada, and Europe.
  • Install RX23W-BGA85pin and fully supports the functions of RX23W.
  • Employs 0.7mm pitch SMT to facilitate board mounting


[SX-23BT-EVK] SX-23BT evaluation kit

  • Mount SX-23BT and output each terminal to a through hole.
  • By connecting the Renesas E2 emulator, immediate evaluation is possible.


Click here for details

Demo Videos
Introducing high performance RX23W BT5.0 enabled MCU, ideal for system controller and provides robust security for IoT connected devices.
Introducing high performance RX23W BT5.0 enabled MCU, ideal for system controller and provides robust security for IoT connected devices.
Introducing high performance RX23W BT5.0 enabled MCU, ideal for system controller and provides robust security for IoT connected devices.
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