Configuration error

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  1. - 18th September 2009, 20:29 #26
    Darrel Taylor's Avatar
    Darrel Taylor
    Darrel Taylor is offline Fanatical Contributor
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    OK!
    Here you go Russ.

    I remembered there was one of those 12F675's that I couldn't recover, and amazingly I found it again.
    It still had the same problem, couldn't program it, couldn't read the configs.

    I put it in a breadboard, connected a 7805 to the VPP voltage from the meLabs programmer, with the 5V out going to VDD on the chip, so that the chip gets VPP before VDD. This is the sequence described in the programming spec.

    It now programs, erases, reads, does everything perfect.

    I've loaded the old program again and saw the same programming problem. Then hooked up the 7805 and wala it works.

    Hope this works for you too.

    Last edited by Darrel Taylor; - 19th September 2009 at 15:37. Reason: Added schematic
    DT
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