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PIC12F629 Question

Discussion in 'Electronic Design' started by Christian Rötzer, Jan 27, 2004.

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  1. Hello World,

    I am currently writing a programming software for a MicroChip PIC12F629.
    During some basic tests I found, that I can delete bits (set to zero) within
    the ID locations (2000h - 2003h), but I can not erase them. I tried
    everything: normal erasing, the unprotect sequence. The bits remain zero.
    The configuration word can be erased. Is there anybody out there who can
    confirm my observations? Or is anybody out there who can erase these bits?

    Thanks in advance

    Christian
     
  2. Don't have any 12F629s handy but the similar 12F675 works fine. MPLAB
    only shows the lower 7 bits, and they recommend only those be
    programmed, so don't know what happens if you program higher order
    bits.

    Best regards,
    Spehro Pefhany
     
  3. Good Idea,

    only to program the specified lower 7 bits. I just programed 3FFEh into
    2001h. That works. So now this bit is zero. And I still can not set it
    again....:-(

    Regards

    Christian
     
  4. I am currently writing a programming software for a MicroChip PIC12F629.
    I recall some problems with the ID bits on F77 but AFAIK my Wisp628
    programs the 12F629 ID bits just fine. I sell these programmers, but
    the firmware source and PC software are available for study (and to
    build your own programmer).


    Wouter van Ooijen

    -- ------------------------------------
    http://www.voti.nl
    PICmicro chips, programmers, consulting
     
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