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Monday, March 04, 2002
Oak Technology debuts industry's first 48X CD-R/RW controller

Oak Technology announced the availability of the industry's first 48X Compact Disc - Recordable/ReWritable (CD-R/RW) optical storage controller, for deployment in the rapidly expanding CD-RW drive market.

The OTI-9797T controller is capable of 48X CD-R as well as 24X CD-RW write speeds, and is pin-compatible with Oak's 32X OTI-9797S controller to provide an easy upgrade path and a fast time-to-market for OEMs. The OTI-9797T is suitable for use in PC-based or consumer audio CD-R/RW applications with IDE interfaces. Supporting Constant Angular Velocity (CAV), an advanced writing technique that achieves 20 percent faster write times than Zoned Constant Linear Velocity (Z-CLV)-enabled drives, the OTI-9797T will enable drives to record a full 650 Megabyte compact disc in just over two minutes.

"The ability for consumers to capture and store music, data, and video applications on CD-RW media is growing at an exceptional pace, and not surprisingly, consumers are demanding faster recording speeds," said Clark Foy, vice president, product marketing, for Oak's Optical Storage Group. "As drive speed continues to migrate upward, Oak is aggressively advancing CD-RW technology and delivering to that demand."

Oak's OTI-9797T controller employs advanced features to achieve the fastest overall recording times while still maintaining high reliability and buffer underrun protection. By supporting CAV at the platform level, the OTI-9797T simplifies integration of this feature for drive OEMs with no previous CAV writing experience, and enables faster write access times for packet writing to CD-RW media. For best performance, the new controller also incorporates support for the Mt. Rainier standard, which allows OEMs the ability to offer drag-and-drop CD rewriting and on-the-fly formatting of the disc. Integrating Oak's patent pending ExacLink™ buffer underrun protection, the OTI-9797T is one of the most reliable CD-R/RW controllers on the market.

CAV Improves Recording Quality

CAV write offers faster overall write speeds as well as an ability to complete the entire write process without pausing the data transfer for zone changes, eliminating the need to invoke the buffer overflow link. With CAV, the drive is not required to change the disc spin rate when tracking from one area of the disc to another, thereby reducing seek times and power disipation. The OTI-9797T employs partial and full CAV write and audio DAC/filter circuits that offer the best performance in the industry, as well as dyanamic write strategy, which allows for a high degree of programability and flexibility in the implementation of CD-R and CD-RW write strategies.

Compatibility with Mt. Rainier Standard

The Mt. Rainier standard enables native OS support of data storage on CD-RW. This makes the technology far easier to use and allows the replacement of the floppy. The Mount Rainier open standard is promoted by Compaq, Microsoft, Philips, and Sony and is supported by 38 industry leaders. Oak Technology has been involved in the development of the specification and is one of the supporting members.

Maximum Integration

In addition to a highly automated block decoder/encoder, the OTI-9797T integrates a 48X CD-DSP that uses a proprietary slicing technique and digital symmetry control to offer increased frequencies and gain programmability. The OTI-9797T digital CD servo provides highly accurate and advanced track counting, enabling the unit to jump an exact number of tracks - up to 2047 tracks - to substantially reduce seek time. The CD wobble servo block supports speeds up to 48X and allows CD encoding at all legacy speeds from 1X to 48X. The controller provides a high level of integration that also includes an Ultra DMA IDE/ATAPI controller and USB1.1 interface. Power management is also provided to reduce power consumption and increase power efficiency.


Oak's OTI-9797T controller is available now, in 208 pin LQFP package, is priced at $15 each in sample quantities, and under $10 each in production quantities of 10,000.

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