Product category: Analogue and Mixed Signal ICs
News Release from: Oxford Semiconductor | Subject: OXFW970
Edited by the Electronicstalk Editorial Team on 07 January 2004
FireWire audio chip for high-quality
sound systems
The OXFW970 is a dedicated FireWire audio controller IC that provides eight digital audio output channels.
A dedicated FireWire audio controller IC has been launched by Oxford Semiconductor Compatible with FireWire (IEEE1394A) and FireWire 800 (IEEE1394B) connections, the OXFW970 chip provides eight digital audio output channels
This article was originally published on Electronicstalk on 23 Jun 2004 at 8.00am (UK)
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Controller adds next-generation audio
The latest version of Oxford Semiconductor's OXFW970 FireWire audio controller IC allows next generation audio systems to be easily added to desktop and notebook systems.
FireWire controller enables bus-powered speakers
A FireWire audio controller from Oxford Semiconductor is the enabling technology behind the first ever bus-powered speakers from LaCie.
Enabling the creation of high quality surround sound systems for both Mac and PC platforms, the OXFW970 uses the bandwidth and quality of service attributes of FireWire to overcome the limitations of alternative USB multichannel audio solutions and removes the need to install separate sound cards.
The FireWire audio controller can receive and process 32bit audio data sampled at up to 48kHz at a streaming speed of up to 100Mbyte/s.
FireWire's power carrying capability also means that the speaker configuration does not require the use of external power supplies.
Via an external 1394 PHY, the OXFW970 accepts isochronous audio packets encoded using the IEC61883-6 transmission protocol, initiates buffering and sample rate control before passing them to the multiple serial audio interfaces and conventional DAC output stage.
A highly integrated device presented in a 100-pin TQFP package, the FireWire audio controller IC uses a combination of its onboard ARM7TDMI processor and high performance buffer manager to implement the 1394 transaction layer.
Its link controller complies with IEEE1394-1995, 1394a and 1394b specifications.
The OXFW970 supports remote programming of 512Kbit of onboard Flash memory over the FireWire bus using firmware and flash programming utilities supplied by Oxford Semiconductor.
Integral UART and JTAG ports facilitate debugging.
The chip offers eight programmable GPIO pins for the addition of application specific functionality.
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