Since the release and growing popularity of Bluetooth Low Energy (LE), Renesas has been a participant in the Bluetooth SIG to contribute to the continuing evolution of the Bluetooth LE specification. As a result, Bluetooth LE is supported in a wide range of Renesas MCUs such as RA, RX, RE and RL78. Renesas is committed to support the future of Bluetooth LE with next-generation MCU development supporting Bluetooth 5.3 and through the addition of the Dialog Semiconductor ultra-low power portfolio.

Bluetooth LE Product Portfolio

Renesas' whole aspect of commitment to Bluetooth Low Energy is summarized in our portfolio. The portfolio contains information related to Bluetooth LE, MCUs, and solutions for each Bluetooth LE MCU, so please download and use it.

Download: Renesas Bluetooth LE Product Portfolio (PDF | English, 日本語)

Device Solutions

RX 32-Bit LE MCU

The RX23W 32-bit LE MCU offers the full functions of Bluetooth 5.0 LE and the built-in security functions essential to IoT devices, as well as rich peripheral features such as touch keys, USB and CAN. As a result, system control for devices and wireless communication can be realized on a single chip. The RX23W also provide a dedicated library that complies with the Bluetooth Mesh Networking specification for multipoint-to-multipoint communication. Renesas also has a lineup of the world's smallest module products with built-in antennas and oscillators.
RX23W Bluetooth LE Solutions Page

RX23W Chip and Module

RA 32-Bit LE MCU

The RA4W1 32-bit MCU incorporate Bluetooth 5.0 LE, a secure crypto engine and low power functionality essential for any IoT application. The RA4W1 also features a rich set of peripheral features such as a capacitive touch sensing unit (CTSU) and a segment LCD controller (SLCDC), making it ideal for wireless applications that use a human machine interface (HMI).
RA4W1 Bluetooth LE Solutions Page

Chip (RA4W1)

RE 32-Bit LE MCU

The RE01B 32-bit LE MCU offers the full functions of Bluetooth 5.0 LE, large memory footprint (1.5MB Flash memory/256KB SRAM), an energy harvesting control circuit, ultra-low power consumption 14-bit ADC, and built-in security functions. RE01B is suitable for many different battery-driven IoT applications due to its ultra-low power and high-speed operation. It uses SOTB™ technology, which enables the device to operate at low voltages.
RE01B Solutions & Product Page

RE01B Chip

RL78 16-Bit LE MCU

The RL78/G1D low-power 16-bit MCU support Bluetooth LE and enable reliable connections with current consumption levels among the lowest in the industry. We also have a "beacon stack" that pursues low current consumption. We also provide a module that can use the abundant function pins of the RL78/G1D as it is, with a built-in antenna and RF circuit.
RL78/G1D Bluetooth LE Solutions Page

Chip (RL78/G1D)


Bluetooth LE Wireless Technology

Bluetooth LE wireless technology is designed for very low power operation and is optimized to short burst data transmission. In order to achieve reliable communication in the 2.4GHz frequency band, it employs a robust frequency hopping spread spectrum method that transmits data over 40 channels.

The Bluetooth LE wireless technology provides great flexibility to developers with data rates from 125Kb/s to 2Mb/s, multiple PHY options that support power levels from 1mW to 100mW, and multiple high-level security options required by government agencies.

LE supports multiple network topologies such as "Point-to-Point" used for data transfer, "Broadcast" used for location services, and "Mesh" used for building large-scale device networks.

Bluetooth LE Features

Frequency Band 2.4GHz ISM band (2.402GHz – 2.480GHz utilized)
Channels 40 channels with 2MHz spacing
(3 advertising channels/37 data channels)
Channel Usage Frequency-Hopping Spread Spectrum (FHSS)
Modulation GFSK
Power Consumption ~0.01x to 0.5x of reference
(depending on use case)
Data Rate LE 2M PHY: 2Mb/s
LE 1M PHY: 1Mb/s
LE Coded PHY (S=2): 500Kb/s
LE Coded PHY (S=8): 125Kb/s
Max Tx Power Class 1: 100mW (+20dBm)
Class 1.5: 10mW (+10dbm)
Class 2: 2.5mW (+4dBm)
Class 3: 1mW (0dBm)
Network Topologies Point-to-Point (including piconet)

The benefit of LE is that it can communicate with applications for smartphones or tablets. LE is already used in many applications such as for healthcare and fitness, home electric appliances, home automation, gadgets, accessories, and location systems.

The Bluetooth wireless technology includes the LE standard and the BR/EDR standard that supports the Basic Rate and Enhanced Data Rate that are the classic standards.

Devices are classified into types that support LE only, BR/EDR only, and both LE and BR/EDR.

Renesas devices (RX23W, RA4W1, RE01B, RL78/G1D) are the types that support only LE.

Renesas Bluetooth Microcontrollers

Applications using Bluetooth LE wireless technology have spread from healthcare devices and continue to expand into a wide variety of fields such as sports and fitness, smart homes, industrial equipment, and beacon applications.

Bluetooth Low Energy Applications


Bluetooth Qualification

The Bluetooth Special Interest Group (SIG) oversees the development of Bluetooth standards and the licensing of the Bluetooth wireless technologies and trademarks to manufacturers.

Refer to the "Bluetooth LE microcomputer / module Bluetooth qualification acquisition application note" for how to register a product using the Qualified Design Identification number (QDID) of our qualified design when selling a device equipped with a Renesas Bluetooth LE microcomputer or module as a Bluetooth product.

Download: Bluetooth LE microcomputer / module Bluetooth qualification acquisition Application Note Rev.1.40 (PDF | English, 日本語)


Common Tools & Applications

The following common tools and applications can be used by Bluetooth LE MCUs.

QE for BLE - Development Assistance Tool

RX LogoRA LogoRE LogoRL78 Logo

The QE for BLE is a dedicated tool for developing embedded software in systems which support the Bluetooth LE protocol stack. This solution toolkit runs in the e² studio integrated development environment (IDE). The combination of the e² studio and QE for BLE makes it easy to test the communications features of Renesas Bluetooth LE MCUs, thus reducing development periods for products being placed on the market. The standard profiles are generated from this tool. It can also design and generate the custom profile.
Please refer to the QE for BLE: Development Assistance Tool for Bluetooth Low Energy page for more information.
QE for BLE: Development Assistance Tool for Bluetooth Low Energy

QE for BLE (RX)


GATTBrowser - iOS/Android Application

RX LogoRA LogoRE LogoRL78 Logo

The GATTBrowser smartphone application can be downloaded from the Apple App Store and Google Play.

The GATTBrowser app is used to check Bluetooth LE behavior. It can scan LE devices which are advertising in the vicinity and can perform GATT-based communication with the connected LE device. You can easily check the sample application behavior. GATTBrowser assists in the development of products that implement the Renesas Bluetooth LE MCU and module.

Download GATTBrowser:

GATTBrowser Application


TryBT - Smartphone Application

RX LogoRA LogoRE Logo

TryBT is a smartphone sample application that supports features for communicating with Bluetooth LE products. You can check communication with the firmware preinstalled in Target Board for RX23W. Also, you can use RA4W1 and RE01B, too.
In addition, icon images as well as a project for Android Studio and source code are provided, so you can use this sample application as a base for developing Bluetooth LE communication application in a Proof of Concept (PoC) phase.

Download TryBT: Bluetooth Low Energy Smartphone Application Example TryBT for Android - Sample Code (ZIP | English, 日本語) (PDF + Android Studio project set)

Smartphone App: TryBT


BTTS - Windows Application

RX LogoRA LogoRE Logo

In the survey/evaluation phase of the development process, new LE functions, API execution procedures and parameters of API can be learned by evaluating the functions and performance of Bluetooth LE supported by the LE MCU using the Bluetooth Test Tool Suite (BTTS).
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.

Download BTTS: Bluetooth LE MCU Bluetooth Test Tool Suite operating instructions Application Note Rev.1.05 - Sample Code (ZIP | English, 日本語) (PDF + Windows application)

Bluetooth Test Tool Suite (BTTS)

Related Links

Page Title Description
RX23W 32-bit performance/efficiency RX23W MCU and RX23W module product information
Bluetooth Low Energy for RX Family RX23W Bluetooth LE wireless solutions
RTK5RX23W0C00000BJ Target Board for RX23W product information
RTK5RX23W0C01000BJ Target Board for RX23W module product information
RX23W-Starter-Kit Renesas Solution Starter Kit for RX23W product information
Bluetooth Low Energy Low Energy Protocol Stack for RX family Protocol stack, profile, and sample program information
SX-23BT Silex SX-23BT / SX-23BT-EVK (SX-23BT evaluation board) partner module product information
RA4W1 Arm Cortex-M4 RA4W1 MCU product information
Bluetooth Low Energy for RA Family RA4W1 Bluetooth LE wireless solutions (including sample programs)
EK-RA4W1 Evaluation Kit for RA4W1 MCU Group product information
Flexible Software Package (FSP) Flexible Software Package (FSP) for Bluetooth Low Energy protocol stack-enabled RA4W1 Group
RE01B RE01B Arm Cortex-M0+ ultra-low power SOTB MCU Bluetooth LE wireless solutions and product information
EB-RE01B RE01B MCU Bluetooth Low Energy EB-RE01B evaluation board product information
Ultra-low power consumption energy harvesting, BLE5.0 evaluation board EB-RE01B Tessera Technology RE01B partner evaluation board EB-RE01B product information
RE Family Development Environment RE MCU development procedure, online training, and development tool information
Bluetooth Low Energy Protocol Stack for RE Family Protocol stack, profile, and sample program information
RL78/G1D Low power 16-bit RL78/G1D MCU and RL78/G1D module (RY7011) product information
Bluetooth Low Energy for RL78 Family RL78/G1D Bluetooth LE wireless solutions
RTK0EN0001D01001BZ RTK0EN0001D01001BZ RL78/G1D evaluation board product information
RTKYRLG1D0B00000BJ RL78/G1D BLE Module Expansion Board with Pmod interface that incorporates the RL78/G1D module (RY7011)
Bluetooth Low Energy Protocol Stack for RL78 Family Protocol stack, profile, and sample program information
RL78 Quick Solutions RL78 Quick Solutions demonstrate how RL78 low power MCUs combined with Renesas' analog and power products can create high-performance solutions for a wide variety of applications
Software & Tools
QE for BLE: Development Assistance Tool for Bluetooth Low Energy Dedicated tool for developing embedded software in systems which support the Bluetooth Low Energy protocol stack
e² studio Eclipse-based integrated development environment (IDE) for Renesas MCUs
Renesas Flash Programmer (Programming GUI) Renesas Flash Programmer provides usable and functional support for programming the on-chip flash memory of Renesas MCUs
Knowledge Base > Bluetooth Low Energy FAQ for Bluetooth specifications, MCUs, modules, protocol stacks, development environment, qualification, and more
Bluetooth SIG Official website for Bluetooth wireless technology

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