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Oxford bridge chip offers 88MBps transfer rate

Posted: 03 Nov 2003 ?? ?Print Version ?Bookmark and Share

Keywords:oxfw912? oxford semiconductor? firewire800? ide? bridge chip?

The OXFW912 from Oxford Semiconductor is claimed by the company as the first FireWire800 (IEEE1394b) to IDE (ATA7) bridge chip to maximize transfer rates for both single and dual disk drives. When striping data across two drives, the chip can achieve a transfer rate of more than 88MBps and maintains its high transfer efficiency even for small data block sizes in single drive applications.

Used with an IEEE1394b PHY, the device provides a cost effective two-chip solution for smart-cable or tailgate interfaces used in removable media drives, CF card readers, CD, DVD, and hard disk drives. The bridge chip is backwards compatible with IEEE1394-1995 and IEEE1394a PHYs and allows IDE drives to use the FireWire's plug and play functionality.

It supports the SBP-2 protocol and uses generic SBP-2 drivers available in Windows 98 and later versions, as well as Apple Mac OS8.4 OSs and above. Compliant with the ATA7 and UDMA6 drive standards, the OXFW912 IDE interface also provides 48-bit LBA support for larger drives.

Packaged in a 100-pin TQFP, the OXFW912 features a range of speed enhancements and is supported by an on-board ARM7TDMI processor. An on-board ORB coprocessor accelerates ORB to ATA command translation.

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