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k_arthur
Visitor II
November 16, 2007
Question

How to erase 20 bytes in flash not all sector?

  • November 16, 2007
  • 3 replies
  • 898 views
Posted on November 16, 2007 at 10:54

How to erase 20 bytes in flash not all sector?

    This topic has been closed for replies.

    3 replies

    K
    k_arthurAuthor
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:46

    Hi all.

    I need to erase only 20 bytes in flash memory.In STR9 Flash Programming Manual no word about it. I tried to write (erase) twenty - 0xFF bytes and after that to write needed bytes. It not work. How to do it?

    J
    jgoril
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:46

    It is not possible to erase single byte(s) for STR9 devices flash memory. You can erase whole sector only.

    M
    m_tibu
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:46

    Just to puntualize,

    it is not possible to erase part of sector in a flash memory in general.

    Suggestion:

    - Copy all the block in RAM and then erase and re-program, coping back whole sector, kepping blank the 20 bytes

    Marco

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