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Error programming 16F628

Discussion in 'Beginner Electronics' started by [email protected], Aug 19, 2005.

  1. Guest

    I have just build the P16PRO40 and am using WinICProg to program my
    PIC.

    I tried posting this message on the winicprog site but there seems to
    be a problem with the registration process.

    I have tried toggling the button in the hardware setting and I get the
    following:

    vpp on: MCLR = 12.85V
    clock high: PGC = 4.9V
    output high: PGD = 4.5V

    I'm using the circuit from www.olimex.com/dev/pdf/pic-pg3b.pdf

    When I program the chip it fails on a verify. It does seem to program
    something as the first few bytes are written although incorrect values.
    I can then erase the device and reprogram it, and different bytes get
    written to the start.

    any idea where I can start looking? I've checked the supply voltage
    with a scope and its stable.
     
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