BTM520/521 Bluetooth™ Multimedia Plus Module

Applications:
High quality stereo headsets
Mono voice headsets
Hands-free devices
Wireless audio cable replacement
MP3 and music players
Medical and healthcare devices
Phone accessories
VoIP products
Cordless headsets
Automotive applications

Designed for applications requiring the ultimate Bluetooth audio performance and flexibility, these modules include everything required for a fully qualified and functional Bluetooth multimedia application.
As well as providing best-in-class radio performance, range, and power consumption, BTM520 and 521 support Cambridge Silicon Radio's RoadTunes and BlueTunes development environments, and the latest Bluetooth Version 2.1+EDR Specification, providing secure simple pairing that improves security and enhances easy use. The BTM521 has an integrated high-performance, multilayer ceramic antenna that can achieve open-field ranges in excess of 300 metres.
The modules include a 16-bit stereo codec and microphone input to support both stereo and mono applications, with the ability to drive 16Ω stereo speakers. Containing all the necessary audio filtration and biasing components, these modules only require the addition of speakers, microphone, and push buttons to make a complete system implementation.
BTM520 and 521 contain a full, integrated Bluetooth stack along with SPP, HFP 1.5, HSP, AVRCP, and A2DP profiles, all of which are Bluetooth qualified. Additional profiles are available for file transfer, object exchange, dial up networking, messaging, and phonebook control.
Future support includes a health device profile, making this the ideal module for development of Continua-compliant medical devices.
These modules include an embedded 32-bit, 64-MIPS DSP core within the BC05 that is integrated with the Bluetooth functionality, allowing significant product enhancements such as echo cancellation, noise reduction, and audio enhancement using additional soft codecs. The 16Mb of flash memory in the module allows complex functionality to be included. DSP routines can be licensed through a number of specialist partners.
Laird has developed a comprehensive AT command interface that simplifies application development, including support for audio and headset functionality. Access to GPIO pins allows mapping for direct connection to actuator buttons on headsets.