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)
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
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
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
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
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)|
|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.
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.
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.
Common Tools & Applications
The following common tools and applications can be used by Bluetooth LE MCUs.
QE for BLE － Development Assistance Tool
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
GATTBrowser － iOS/Android Application
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.
TryBT － Smartphone Application
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)
BTTS － Windows Application
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)
|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|
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Renesas Electronics Corporation is under license. Other trademarks and trade names are those of their respective owners.