Address mapping method and mapping information managing method for flash memory, and flash memory using the same
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United States of America Patent
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Apr 20, 2010
Grant Date -
Jun 30, 2005
app pub date -
Dec 22, 2004
filing date -
Dec 30, 2003
priority date (Note) -
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Abstract
A method for minimizing the degradation of performance upon accessing a flash memory using a logical-physical mapping scheme, and a method for efficiently storing and managing information on logical-physical mapping in a flash memory. A method for writing data in a flash memory includes determining whether a sector is empty in a physical page having a most recently written logical page number of data to be written, the offset of the sector matching that of the data to be written; if the sector is empty, writing the data in the sector to the physical page; and if the sector is not empty, selecting an empty physical page to write the data to a sector in the selected empty physical page of which the offset matches that of the data to be written and writing a logical page number for the data to the selected empty physical page.
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