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Method of writing, erasing, and controlling memory for memory device

  • US 6,584,579 B1
  • Filed: 10/17/2000
  • Issued: 06/24/2003
  • Est. Priority Date: 10/01/1993
  • Status: Expired due to Fees
First Claim
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1. A management method of writing data in a memory device with a memory area unable to be overwritten on a bit-specific basis, the memory area having a plurality of sectors and said memory device erasing and writing data by a unit of one sector, said method comprising:

  • writing data of N logical addresses to N+1 sectors by leaving one of the N+1 sectors as a free sector;

    finding, from the N+1 sectors, a sector that stores data having a specified logical address;

    erasing the sector that stores the data having the specified logical address; and

    writing new data having the specified logical address to the free sector, and designating the erased sector as a free sector for subsequent data writing.

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