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Oxford chip supports FireWire standards

Posted: 08 Jan 2004 ?? ?Print Version ?Bookmark and Share

Keywords:audio controller ic? oxford semiconductor? oxfw970? arm7tdmi? processor?

A dedicated FireWire audio controller IC has been launched by Oxford Semiconductor that is compatible with FireWire (IEEE1394A) and FireWire 800 (IEEE1394B) connections.

Enabling the creation of high quality surround sound systems for both Mac and PC platforms, the OXFW970 chip uses the bandwidth and QoS attributes of FireWire to overcome the limitations of alternative USB multi-channel audio solutions.

The audio controller can receive and process 32-bit audio data sampled at up to 48kHz at a streaming speed of up to 100MBps, and provides eight digital audio output channels. Via an external 1394 PHY, the device 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.

Supporting remote programming of 512Kb of on-board flash memory over the FireWire bus using firmware and flash programming utilities supplied by the company, the chip offers eight programmable GPIO pins for the addition of application specific functionality.

The chip is offered in a 100-pin TQFP package, and uses a combination of its on-board ARM7TDMI processor and buffer manager to implement the 1394 transaction layer.

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