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Vehicle data rewrite technique

  • US 20020046344A1
  • Filed: 08/08/2001
  • Published: 04/18/2002
  • Est. Priority Date: 08/31/2000
  • Status: Abandoned Application
First Claim
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1. An electronic control apparatus, comprising:

  • a storage portion;

    a memory portion in said storage portion;

    a security flag portion in said storage portion;

    said memory portion being in at least one of an initial state and a written state;

    said written state exiting on a successful writing to said memory portion;

    said initial state existing on at least one of an unsuccessful writing to said memory portion and an unwritten state of said memory portion;

    said security flag portion indicating a status of said memory portion as being in said at least one state;

    a control portion for controlling communication with said storage portion;

    said control portion including means for controlling, on a basis of said status, one of a writing and a rewriting to said memory portion according to an external standard having a delay portion; and

    said control portion further including means for bypassing said delay portion when said security flag portion indicates said status as being in said initial state, whereby said control portion avoids said delay portion.

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