Bluetooth® 5 Dual Mode Programmable Audio Module – LM747
The LM747 Bluetooth® 5 compliant programmable audio module is a compact and cost effective solution.
Enabling audio data to be wirelessly communicated between audio devices. Using a Bluetooth® v2.0, v2.1 and Bluetooth® v4.0, v4.1, (or 5 compliant) connection. It’s sound enhancement features, makes it a perfect fit within your premium audio device.
The sound enhancement features includes CSR’s aptX® audio technology. Providing CD-like quality over a Bluetooth® connection. And CSR’s cVc audio technology for noise cancellation.
Perfectly suited to wireless headphones, speakers and hand-free headsets. This standalone module allows the developer to connect a microphone, speakers and other I/O devices.
Running the user application without using an external MCU. LM offer application support to the developer and can create new user applications for the module.
Your developed user application and settings can be preloaded to the LM747, simplifying the manufacturing and testing process. Its SMT side and bottom pads allows for easy integrations into your embedded system.
Typical Applications
- Wireless headphones and speakers
- Hand-free headsets
- Automotive infotainment systems
- Home entertainment devices
- Audio adapters
Documentation
USER MANUALS
LEGACY MANUALS
* For any other product documentation please Contact Us
Applications
LM offers firmware development support to assist with bespoke solutions. The LM747 Multimedia Module comes with a range of firmware for quick deployment. Firmware can be modified to meet your unique requirements or used for evaluation purposes.
Available Applications
Headset (Default)
The Headset application is Bluetooth 5 complaint, supporting the Headset Profile (HSP), Advance Audio Distribution Profile (A2DP) and Audio/Video Remote Control Profile (AVRCP). This defines the way the LM747 receives audio streaming from a connected device. It also enables basic control functionality such as play-pausing music, answering-rejecting calls and adjusting the volume. This makes it the perfect solution for manufacturing wireless head phones.
Latest firmware version: 74XLM_SINK_0202
Audio Gateway with AT Commands (0103)
The AT Commands Structure (0103) application contains the Audio Gateway Hands Free Profile (AGHFP). AGHFP allows the LM747 module to be the source of the audio stream for the connected device to output. The application also provides AT Commands for Bluetooth and Bluetooth low energy connections. Serial data is transmitted with the Serial Port Profile (SPP) and the Serial over GATT (Bluetooth low energy service). Users can read, write or modify data on the connected devices by utilising simple AT commands.
Latest firmware version: 74XLM_ATSRC_0103
Audio Gateway with AT Commands (0102)
The AT Commands Structure (0102) application contains the Audio Gateway Hands Free Profile (AGHFP). AGHFP allows the LM747 module to be the source of the audio stream for the connected device to output. The application also provides AT Commands for the Bluetooth connection. Serial data is transmitted with the Serial Port Profile (SPP). Users can read, write or modify data on the connected devices by utilising simple AT commands.
Firmware version: 74XLM_ATSRC_0102
Getting Started
Applications are evaluated with the LM559 Multimedia Development Kit.
Certifications
View the certifications for this product.
