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DEVICE AND METHOD FOR BACKING UP DATA ON NON- VOLATILE MEMORY MEDIA, OF THE NAND FLASH TYPE, DESIGNED FOR ONBOARD COMPUTERS

  • US 20100011157A1
  • Filed: 06/25/2009
  • Published: 01/14/2010
  • Est. Priority Date: 07/08/2008
  • Status: Abandoned Application
First Claim
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1. Device for backing up data on a non-volatile memory medium of onboard computers, the device comprising:

  • a microcontroller having a random access memory; and

    a flash memory component, wherein the flash memory component comprises;

    N backup-dedicated sectors used to backup files and messages, the files associated with one or more of the messages, the backup-dedicated sectors having one or more respective addresses and comprising;

    corrupted backup-dedicated sectors; and

    uncorrupted backup-dedicated sectors,wherein the uncorrupted backup-dedicated sectors exhibit a number of completed erasure cycles;

    the flash memory component further comprises a master table block comprising;

    a corrupted sectors table, to list the addresses of the corrupted backup-dedicated sectors;

    a wear levelling table, to list the number of completed erasure cycles associated with each of the uncorrupted backup-dedicated sectors; and

    a logbook and message table, comprising a set of file identifiers to identify one or more files, each file containing one or more messages, the logbook and message table making it possible to list the addresses of the backup-dedicated sectors containing the data associated with the messages; and

    the backup device further comprises;

    a circuit to erase and to recreate the master table block at a different address upon each modification of at least one backup-dedicated sector.

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