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Method for detaching sectors in a flash EEPROM memory array

  • US 5,357,475 A
  • Filed: 10/30/1992
  • Issued: 10/18/1994
  • Est. Priority Date: 10/30/1992
  • Status: Expired due to Term
First Claim
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1. A method of releasing sectors of memory in a flash EEPROM memory array comprising the steps of:

  • storing a list of sectors to be deleted in a first table,selecting a sector from the first table,searching a second table for a physical position of the sector,seeking the sector specified by the physical position in the flash EEPROM memory array,marking a header of the sector found as invalid,writing in free space in the flash EEPROM memory array without data a new header for the sector found,updating the second table with a new physical position of the new header for the sector, andrepeating the steps of selecting a sector from the first table until a selected number of sectors listed in the first table have been selected.

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