Control device applicable to flash memory card and method for building partial lookup table
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 9, 2004
Grant Date -
May 22, 2003
app pub date -
Nov 16, 2001
filing date -
Nov 16, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention proposes a control device compatible to Smart Media cards, Memory Stick cards, and NAND-gate type flash memories and applicable to various kinds of capacities and a method for fabricating same. After the control device is turned on and scans physical block addresses of each data block of a memory card one by one, it will partition the memory card into a plurality of segments according to the capacity of a segment lookup table therein. A FAT accessory lookup table in the control device is matched and used for lookup of logical addresses of the FAT. When a host computer is to access a file, the segment lookup table can be used for lookup of data in the segment, and the FAT accessory lookup table will match the operation system to quick find the physical block address when the FAT is accessed. The control device can be compatible to flash memory cards of various kinds of capacities, and the required size of the size of total lookup tables built in RAM can be effectively controlled.
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