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SATA-compatible NAND flash controller supports 150MBps

Posted: 07 Feb 2008 ?? ?Print Version ?Bookmark and Share

Keywords:serial ATA? NAND flash memory controller? LSI circuit?

A serial ATA compatible NAND flash memory controller LSI circuit has been released by TDK Corp. The GBDriver RS1 Series is compatible with 1.5Gbit/s serial ATA I and supports data transmission speeds up to 150MBps. When functioning as a NAND flash memory controller IC, it can control the latest 4Kbyte/page single-level cell (SLC) and multilevel cell (MLC) NAND flash memories. It is thus suitable for a wide range of uses from storing embedded OS to consumer applications such as music and streaming video storage.

NAND flash memory capacities continue to increase while prices fall, and the use of flash memory as an alternative for HDDs is expanding rapidly, with HDD data transfer formats are currently shifting from parallel ATA to serial ATA. Prior to the GBDriver RS1, when NAND flash memory was controlled using the SATA format, it was necessary to have a flash memory controller IC and an SATA converter IC. Now both functions can be handled by a single chip.

Data protection features
The GBDriver RS1 controller secures expanded spare space for future bad blocks, has improved block control structures within the controller, and is equipped with an address control mechanism structure that can be used even when a large number of inherent bad blocks occur in the memory in a short period. It has improved power interruption tolerance, and completely prevents collateral errors that result in corruption of data other than the data being written if power is interrupted when writing data. It is equipped with error correction and recovery, with 8bit/sector ECC functions that have been improved to ensure adequate reliability with regard to the bit error seen when multilevel NAND flash memory is used. An auto-recovery function has also been added to correct bit errors automatically when reading data repeatedly (read-disturbance errors).

The controller is supplied in a 64-pin 12mm x 12mm TQFP package.

TDK will begin releasing the new GBDriver RS1 in May 2008.




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