Our solution facilitates seamless Auracast broadcast transmission, reception, and assistant functionality, fully integrating these capabilities into your system to create a comprehensive Bluetooth broadcast application. Leveraging the advanced computing power of a multifunctional MCU and DSP combination, you can effortlessly implement specialized application processes. Additionally, our solution supports display capabilities, providing Auracast assistant displays for presenting visual information. With a wide range of audio interface options, including I2S, USB, and analog ADC, our solution offers extensive flexibility for connecting to various external audio sources.
System Structure
The RTL8763E serves as the primary Auracast controller, interfacing with the audio source from the audio processor through I2S or UART. Additionally, the RTL8763E can independently receive analog signals from a line-in or a physical microphone. Its integrated Bluetooth module facilitates Auracast broadcast functionality, making it a fully equipped transmitter.
The RTL8762EMF chip is specifically designed for smart locks, providing Bluetooth data passthrough functionality to enable wireless communication between devices.
Bluetooth dual mode microcontroller implements a Bluetooth transmitter, which is a device capable of wirelessly transmitting audio or other data to Bluetooth-enabled devices. It can be connected to non-Bluetooth audio sources, such as TVs, computers, or stereo systems, through various interfaces. Utilizing Bluetooth technology, it sends the audio signal to Bluetooth headphones, speakers, or other receiving devices.
Realtek's single-mode BLE SoC and dual-mode BT SoC platforms provide robust Bluetooth communication capabilities, integrating mainstream display interfaces and image processing engines within the chip. Coupled with a wealth of peripheral interfaces like SPI, I2C, CAN, PWM, and Keyscan, these platforms enable developers to fully unleash their creativity. The comprehensive product family makes it easy for developers to choose suitable and competitive solutions.
The Realtek SDK includes a complete user interface development toolkit, allowing developers to quickly bring their ideas to life.
The Realtek RTL87x2G integrates USB 2.0 High-Speed and 2.4GHz wireless interfaces within a single-chip architecture, delivering a smooth 8K user experience with ultra-low latency. Additionally, its rich peripheral interfaces such as SPI, QDecoder, Keyscan, I2C, GPIO, and PWM enable developers to add advanced features for product differentiation while maintaining excellent power performance. The chip, combined with the mature and comprehensive Realtek SDK, development documentation, and related tools, allows developers to quickly realize their creative ideas.
The RTL8762CKF/RTL8762DKF-VS are dedicated control chips for smart locks, primarily responsible for connecting and managing various peripheral modules to implement basic lock functions. These low-power, fast-response chips do not support security features like fingerprint recognition and must be paired with a dedicated security chip to form a complete smart lock solution.
Bluetooth dual mode microcontroller implements a Bluetooth receiver solution is capable of receiving wireless audio or other data from Bluetooth-enabled devices. It can be connected to non-Bluetooth audio output devices, such as car stereos, home theater systems, or headphones. The receiver then converts the received digital signal into analog audio that can be played through the connected output device. It can also be connected to audio processors through interfaces such as I2S/UART/SPI to expand audio signal formats and provide additional transmission interfaces.
The RTL8763E Bluetooth receiver solution can scan for wireless audio from Auracast transmitter devices. It also connects to an Auracast assistant device, decoding the broadcast parameters of the selected program from the assistant. The receiver then configures these parameters to receive the specific wireless audio signal from the Auracast transmitter and plays it back through the output device.
The RTL8763E serves as the Auracast Assistant, scanning and managing audio streams from Auracast transmitters. It assists in discovering available transmitters and their respective audio streams, providing users with channel information and metadata to make informed choices. The RTL8763E offers an I8080 interface and an SPI display interface, enabling developers to connect a screen that allows end users to browse, select, and switch between different audio streams with ease. The assistant communicates the chosen channel information to the Auracast receiver and decodes the necessary parameters for seamless configuration.
RTL8762 series not only supports standard SIG Mesh based on ADV communication, but also supports multi-master and multi-slave connection, which can build private Mesh internet based on GATT connection, to actualize the device's AD hoc network function. These two Mesh technologies complement each other and each has its own strengths.
RTL8772GWF & RTL8762GKH are Bluetooth SoC Solutions optimized for smart locks.
RTL8772GWF features a Real-M300V 125MHz MCU (Cortex-M55 compatible) with ample SRAM resources to support fingerprint algorithm processing. It integrates hardware-level security mechanisms like Trust Zone and has obtained PSA-L2 certification, providing financial grade security for smart door lock applications. The QFN88 package offers up to 56 general purpose GPIOs, supporting rich peripheral interfaces through pin multiplexing, making it suitable as a single-chip solution for smart door locks.
RTL8762GKH also provides sufficient computing power for fingerprint algorithms while maintaining PSA-L2 security level. Its compact QFN48 package is designed for main control solutions requiring fewer peripheral interfaces.
Realtek partners with financial grade security solution providers to deliver complete security solutions from chip to system level, accelerating smart door lock product development and deployment.
Realtek offers flexible HMI system solutions, featuring mature and stable UI designs and efficient implementation techniques. These help a wide range of customers to quickly complete technical selection and transition to rapid development and acceptance phases. For gateway devices, Realtek provides cost-effective dual RF solutions, ensuring that 15.4/BLE mesh gateways operate 100% of the time and reducing event loss probability. For high-QoS customers, Realtek offers Ethernet solutions to ensure more stable communication over long-distance nodes. Interface technologies such as CAN provide integrated advantages for industrial users and vehicle scenarios. The solutions integrate a series of mature SDKs including Wi-Fi driver, LWIP, Thread, Matter, Classic Bluetooth, and BLE mesh. UI support is tailored to customer needs, with several UI engines like RTK-UI, RVD (Realtek Visual Designer), and LVGL (Light and Versatile Graphics Library) meeting different design requirements.
For Apple Find My tag, Gsensor and buzzer are two essential peripheral components. The typical architecture diagram is as follows:
Realtek smart watch solution based on RTL8773E uses a single BT SoC as the main controller. It connects to peripherals via interfaces such as SPIC, I2C, SPI, GPIO, I8080, MIC, and DAC, and connects to phones via Bluetooth to create a highly integrated smart watch solution.
Realtek provides reference designs, SDK, and toolchains, characterized by high integration and ease of development.
The main control MCU in the product extends physical communication interfaces such as UART, SPI, I2C, and USB to connect with the Realtek solution, enabling Bluetooth data passthrough functionality.
Bluetooth dual mode microcontroller implements a Bluetooth transceiver is a solution that integrates both Bluetooth transmitter and receiver functionalities. It allows bidirectional communication between Bluetooth-enabled devices by wirelessly transmitting and receiving data. The solution utilizes two RTL8763E chips, one for transmitting and one for receiving, and communicates through the SPI interface to establish and maintain Bluetooth connections. Additionally, it can also be used with a main processor over the UART interface, making it versatile for various applications like wireless audio streaming, data transfer between devices, and remote control capabilities.
Practical Application Case
From a technical perspective, Find My tag can support both Apple Find My and Google Find My protocols, enabling the same tag to be located and searched for by both iOS and Android devices. However, in the actual implementation of the solution, how to run the two protocols on the same tag must strictly follow the protocol specifications of Apple and Google.
Phone <-> ACI Device 1: Communication with Bluetooth/Bluetooth Low Energy
ACI Host <-> ACI Device 1: Communication with UART
ACI Host <-> ACI Device 2: Communication with UART
ACI Device 1 <-> ACI Device 2: Communication with SPI and GPIO or just use I2S as a replacement
ACI Device 2 <-> BT Headset: Communication with Bluetooth/Bluetooth Low Energy.
ACI Device 1 supports A2DP Sink and HFP HF; ACI Device 2 supports A2DP Source and HFP AG. The audio data flow is identified by the blue line with arrows.
In A2DP scenario:
Audio data : Phone -> ACI Device 1 -> ACI Device 2 -> BT Headset;
In SCO scenario:
Downstream voice data : Phone -> ACI Device 1 -> ACI Device 2 -> BT Headset spk;
Upstream voice data : BT headset MIC -> ACI Device 2 -> ACI Device 1 -> Phone.
Application Scenario
Advantages of Solution
Supports I2S, Line In to connect audio data; while digital interfaces such as GPIO/I2C/UART/SPI can be connected to a wider range of sensors or external devices.
Haven been verified by actual projects, the Mesh protocol stack targeted optimizing and improving the efficiency of Mesh communication, reliability and stability. Supports simultaneous operation of Bluetooth Mesh and GATT connection, which satisfies the requirement of efficient communication in large-scale application scenarios.
Realtek's chip series delivers outstanding low-power performance, enabling smart locks to operate reliably over extended periods while maintaining stable functionality.
Supports Mainstream Display Interfaces on the Market.
The MCU is ARM Cortex processor, with optional main frequency of 40MHz ~ 90MHz and optional SRAM 104KByte ~ 192Kbyte. Supports hardware AES/ECC, very suitable for algorithm-intensive application scenarios. Supports Bluetooth 5.0, ultra-low power consumption.
A 2.5D hardware graphics engine that supports rendering, scaling, rotating, deforming, and other processing of graphics.
Support dual-mode (BR/EDR/BLE) pass-through and BLE pass-through solution. GATT, SPP and iAP profiles inside for dual-mode，GATT profile inside for BLE mode.
High-speed USB and 2.4G interfaces providing 8K polling rate.
Highly integrated with various peripheral interfaces such as SPI, QDecoder, I2C, PWM, GPIO, and display interfaces.
Baud rate up to 4Mbps，Default baud rate 115200bps，UART I/F (H4 supported)，Hardware flow control supported.
Highly integrates various peripheral interfaces such as SPI, I2C, GPIO, CAN, PWM, and Keyscan interface.
CPU computing power and MCU memory provide sensor algorithms or external device control capabilities.
Use one BLE SoC to actualize a single-chip solution, BLE connection and other functions. High degree of integration, extremely reduce the cost of the solution.
Realtek's Bluetooth technology ensures a stable connection between the lock and paired devices, delivering rapid response at short range, enhancing both user experience and security.
Had been connected to Tmall, Xiaomi, Xiaodu, Huawei, Haier, Gree and other platforms for batch shipment, meaning it is a mature and stable solution.
Equipped with a lithium battery charging function, it can provide a charging current of up to 300mA (Constant Current Mode). This allows it to charge small mobile devices with built-in lithium batteries, reducing the need for additional PCB circuit components.
Equipped with I8080 and SPI display interfaces, it allows developers to connect a screen for showing information. This can be used to display internal information for transmitters and receivers or to present program listings on an assistant device.
Full-featured Mesh SDK, includes various product prototype engineering and Mesh SDK and OTA SDK for different mobile phone platforms, which greatly reduces customer's development workload and accelerates the implementation of project.
Whether for entry-level or high-end smart locks, Realtek's chip series provides seamless compatibility, meeting diverse user demands.
The Find My SDK has fully implemented the dual protocols of Apple Find My and Google Find My, which is stable and reliable. Customers only need to do secondary development of application layer functions.
DSP computing power provides powerful speech and audio processing capabilities.
Full-featured dashboard SDK, supporting mobile phone APP engineering, reduces customer's development workload, accelerates the implementation of project.
Supports 2.5D display effect and hardware-level lossless image data compression; supports dual-helmet two-way local voice communication.
While delivering high performance, it also exhibits excellent power consumption characteristics.
BLE/2.4G/high-speed USB interfaces highly integrated on a single chip, providing product applications across various platforms.
Realtek offers well-developed SDKs and detailed technical documentation, helping customers streamline functional development, testing, and mass production, reducing time to market.
Supports interfaces such as GPIO/I2C/SPI/UART/ADC/DAC/MIC, and can be externally connected to a wide range of devices.
Full-featured SDK/HDK/Tools development kits, with supporting mobile phone APP engineering, which greatly reduces customer's development workload and accelerates the implementation of project.
Equipped with Auracast transmitter, receiver, and assistant roles, it enhances the variety of products customers can design, enabling the complete development of an entire Auracast product application.
Fully-featured SDK, including a variety of product prototype projects such as Auracast transmitter, receiver, and assistant example code, and mobile App SDK, OTA Tool, significantly reduces the design time and accelerates project mass production.
Includes Bluetooth LE Bluetooth Legacy Audio、LE Audio， Implement product requirements with the latest technology.
From solution selection to certification services, Realtek ensures fast and high-quality support at every stage, empowering customers to succeed.
Certified by Allion Labs and widely validated in the market.
Versatile IC packaging can be flexibly used in a variety of different applications.
A fully functional SDK development package that includes complete product prototype engineering, mobile APP SDK, OTA tools, and production tools, Provides an RVD graphical interface design tool， reducing customer development work and accelerating project implementation.
A wide range of IC packages can be flexibly used in various applications.
A fully functional SDK development package that includes complete product prototype engineering, mobile APP SDK, OTA tools, and production tools, reducing customer development work and accelerating project implementation.
A fully functional SDK development package that includes a complete product prototype project, development and testing tools, upgrade tools, production tools, etc., which reduces customer development work and accelerates project implementation.
Start implementing my smart lock application
Feature Definition: Identify core functionalities such as Bluetooth unlocking, PIN code access, remote control, security alarms, etc.
User Needs: Consider user habits and security requirements to determine the lock's UI and operation methods.
Register an account
Apply for product plan ID
Chip Selection: Refer to the component selection guide to choose a suitable chip that ensures stable connectivity and fast response.
Evaluation Board Purchase: Buy the corresponding evaluation board from online stores for functional assessment and performance testing to verify hardware compatibility.
App Development: Development based on the Common SDK for secondary development to achieve smart lock functions including remote control, user management, and log recording.
Security Integration: Implement advanced encryption and security protocols to ensure data transmission and storage safety.
SDK Download Portal: RTK8762C SDK | RTK8762D SDK | RTK8762E SDK | RTK87x2G SDK
Select chips and develop product
Obtaining Find My Certification
Hardware Integration: Assemble chips, sensors, actuators, and other components into the door lock system.
Software Testing: Conduct comprehensive functional, performance, and security tests to ensure system stability and reliability.
Certification Preparation: Gather required documentation and test reports to apply for certifications (e.g., Bluetooth SIG, security compliance).
Mass Production Setup: Configure and test production lines to ensure quality and consistency in large-scale manufacturing.
