Product category: Microprocessors, Microcontrollers and DSPs
News Release from: Oxford Semiconductor | Subject: OXFW970
Edited by the Electronicstalk Editorial Team on 23 June 2004
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.
Providing PC and Mac platforms with up to eight audio output and now two audio input channels via a single FireWire connection, 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 Harnessing the high bandwidth and quality of service characteristics of FireWire (IEEE1394) and FireWire800 (IEEE1394b), OXFW970 high quality, multichannel audio solutions avoid the need to install separate sound cards in desktop computers
This article was originally published on Electronicstalk on 7 Jan 2004 at 8.00am (UK)
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FireWire audio chip for high-quality sound systems
The OXFW970 is a dedicated FireWire audio controller IC that provides eight digital audio output channels.
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.
In addition, FireWire's power carrying capability means that smaller speakers will not require external power supplies.
Linked to a FireWire bus by an IEEE1394 PHY, OXFW970 handles serial audio data conforming to the IEC61883-6 transmission protocol and AM824 audio format.
Sampling 24bit audio packets at 96kHz, the chip provides four I2S stereo audio outputs, producing eight high quality digital audio outputs for 7.1 surround sound speaker systems, and two audio inputs for musical instrument and microphone line inputs required in emerging GarageBand applications.
The 100-pin TQFP packaged OXFW970 is a highly integrated, low cost device that features an embedded ARM7 processor, high-speed buffer manager, RAM and 512Kbit of onboard Flash memory.
Firmware upgrades are simply implemented using the FireWire interface and programming utilities provided by Oxford Semiconductor.
Debugging is supported by JTAG pins and the chip's integral UART port.
Eight GPIO pins further extend the device capabilities, enabling for example control of an external DAC using a serial control interface.
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