STMicroelectronics is offering a Bluetooth-based hands-free car-kit reference design. Featuring noise- and echo-cancelling, ST's Blue HFCK is claimed to be ready-to-use, extremely easy to install, and suitable both for OEMs and as an after-market solution.
Bluetooth allows the use of a standard protocol wireless data exchange, independent of the cellphone. Requiring a standard 12 V supply, the product uses advanced DSP technology, optimised for audio applications.
The Bluetooth interface of Blue HFCK uses ST's STLC2410B base-band chip and STLC2150 RF chip. The STLC2410B includes all lower-layer functions of the Bluetooth protocol. The chip's embedded micro supports data as well as voice, and is also used to run the Bluetooth protocol, application layers, and application software. The software runs from external Flash.
Blue HFCK supports the 'Headset' profile which allows it to use the basic functionality of current Bluetooth phones; 'Dial-up networking' profile allows the modem of the mobile phone to be used by any Bluetooth device, such as PCs or PDAs; and the 'Object push' profile (OPP) provides the ability to program the phonebook by sending contacts directly from the PDA.
All DSP functions, such as speech recognition, echo cancellation, noise suppression, automatic gain control, and audio interface are supported by ST's TDA7550R.
For more information contact Simon Churches, Arrow Altech Distribution, +27 (0)11 923 9600, [email protected]
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