complete reference design hands free operation connecting Bluetooth de

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Bluetooth Hands-free
complete reference design hands free operation connecting Bluetooth device
Today, Bluetooth increasingly popular establishing wireless connection between driver's cellphone hands-free kit. STMicroelectronics' high-performance, Blue Hands-free (HFCK) ready-to-use Bluetooth hands-free reference design which extremely easy install, ideal both after-market solution.
Bluetooth interface DSP-based Echo canceling Noise suppression Voice activation phone-book (speaker dependent)
Using advanced technology, optimized audio applications, Blue HFCK offers powerful functionality which includes echo canceling, noise suppression voice activation. Bluetooth interface Blue HFCK uses ST's STLC2410B base-band chip STLC2150 chip. STLC2410B offers compact complete solution short-range wireless connectivity, includes lower layer functions Bluetooth protocol. chip's embedded microprocessor supports data well voice, also used Bluetooth protocol, application layers application software. software located external Flash.
Blue HFCK Audio selection Flash Flash Bluetooth® section BlueToothRF STLC2150
TDA7550R
ARM7 STLC2410
On/off Power supply Display alpha numeric Hangup pickup Push talk
Main power
www.st.com
Bluetooth profiles
Generic access
Provides interoperability with Bluetooth device delivers basic functionality.
Object push profile
Eliminating need complex user operations phone customization, profile standard implemented Bluetooth phones other devices such PDAs allow users program phonebook sending contacts directly from PDA.
Headset
Implementing headset profile means that Blue HFCK used Bluetooth phones currently available communicate with device that acts audio gateway.
Hands-free profile
Allows cellphone full functionality kit. Basic functionality bi-directional voice communication ability answer incoming calls.
Dial-up networking profile
Allows mobile phones offer capability their modem Bluetooth device, such PDAs which need gain wireless access data infrastructures.
TDA7550R powerful functions
ST's TDA7550R complete system chip (SOC) offering:
Echo canceling noise suppression
clear conversation important cancel echos suppress noise. TDA7550R's algorithms provide:
High-performance 24-bit, fixed-point core Program memory Data memory On-chip stereo, 16-bit Sigma-Delta AD/DA converters SPI/I2C interface External memory interface (EMI) function with fine tune clock generator
Full duplex streaming Cellular phone speaker Microphone cellphone
Digital signal processing (On/off switch each component) Acoustic echo cancellation Typical -50dB moving Microphone background noise suppression -40dB) Microphone (automatic gain control) Cellular output
Voice activation
Blue HFCK supports speech activation phone numbers using speech recognition software running TDA7550R. board contains necessary components analog audio drive phone. Speech recognition software provides:
User words selection number from personal phonebook (speaker dependent, language independent) Voice prompt availability High reliability noisy conditions Response time: 250ms
Speaker independent speech recognition available upon request.
STMicroelectronics February 2005 Printed Italy rights reserved
STMicroelectronics corporate logo registered trademark STMicroelectronics group companies. other names property their respective owners.
selected STMicroelectronics sales offices fax:
France 55489569; Germany 4605454; Italy 8250449; Japan 57838216; Singapore 6481 5124; Sweden 58774411; Switzerland 9292900; United Kingdom Eire 1628 890391; 2678
Full product information www.st.com
Order code: FLBLUE0205
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complete reference design hands free operation connecting Bluetooth de

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