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stupid error migrating from pic16f628 to 628A

Discussion in 'Electronic Design' started by blisca, May 25, 2007.

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  1. blisca

    blisca Guest

    In this world we are 6 billions,so there is a reasonablance that someone
    else did the same error

    i simply turned my programmer(Willepro ,a good amateurish programmer) from
    one device,16f628 to another 16f628A

    doing this the configuration word that was good for re-programming 16f628
    set the 16f628A in protected all mode

    well,it is just about 3 ics,less than 6 euro,but i 'm not used to throw away
    anything until i'm shure that there are no more ways to recover it

    the question is:no way to erase it completely so it can be used more and
    more again?

  2. All of the PIC flash parts (including the 16F628A) can be re-
    programmed as many times as you need it. The protected mode does not
    prevent you erasing the chip and re-programming.
    If for some reason your programmer does not somehow support this then
    get one that does. Perhaps there is an option you have missed?

  3. blisca

    blisca Guest

    thank you but still looks otp-like
    i use the configuration word 03A2,after programming the first time i have
    the indication "error blowing fuses",and no way to program it again....
    i'm desperate ,it is 4:32 am here and i have to finish before 9:00 :-(
  4. AJ

    AJ Guest

    I don't like 628's....
  5. blisca

    blisca Guest

  6. blisca

    blisca Guest

  7. As for the configuration bits, /MCLR is enabled so it is not used for input.

    As far as I learn from MPLAB, the configuration word "03A2" is accepted for
    both the 16F628 and the 16F628A.

    It is said that the programming algorithms for the 16F628 and the 16F628A
    differ. Both have their own specifications but I did not compare in detail.
    It is rumoured that using the wrong algorithm may do damage to the device,
    though I did not find a confirmation so far.

    AFAIK the only thing you can do is finding another, high voltage, programmer
    and trying to perform a bulk erase. I can try it for you, but I don't think
    it to be cost effective :)

    petrus bitbyter
  8. Marra

    Marra Guest

    MPLAB will erase it for you.

    I use the PICSTART by Microchip.

    Why buy cheap rubbish instead ?
  9. blisca

    blisca Guest

    Subject: Re: stupid error migrating from pic16f628 to 628A

    one good reason could be that at that time willepro fit my budget ,and was a
    good choice for the hobbyst,being able even to program other devices(flash
    memories,atmel devices and so on)
    of course i would like a more microchip-oriented programmer,with the ICD

    thanks to Marra,Petrus,AJ and David
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