Fixing an IC

Discussion in 'General Electronics Chat' started by jamus, Sep 30, 2014.

  1. jamus

    Thread Starter Member

    Feb 11, 2013
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    This may sound like a dumb question, but has anyone ever encountered a method of fixing zapped ICs?
    A method for retrieving programming from a dead microcontroller?

    I have a burnt up micro controller and it is pretty unlikely that I am going to be able to get source code or a bitstream from the company. If I could make it work long enough to bit sniff or if I could somehow extract its programming I just might be able to replace it.
     
  2. JDT

    Well-Known Member

    Feb 12, 2009
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    Impossible.
     
  3. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
    5,694
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    You might find this report interesting. I noticed that I downloaded it in 2006. My how time flies.

    http://core.kmi.open.ac.uk/download/pdf/72289.pdf

    A blown chip would make it even harder. You don't describe the extent of "blown." I have "blown" a single pin on a PIC, but was able to use the others. I assume that your chip is more blown than that. In any event, it sees like buying a new device would be cheaper than trying to reverse engineer the device you have.

    John
     
  4. Papabravo

    Expert

    Feb 24, 2006
    10,144
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    It would be easier to publish a functional specification of the device and get some help in making a new improved model. Less cost in time and money as well.
     
  5. alfacliff

    Well-Known Member

    Dec 13, 2013
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    whst is the number on the chip? what kind of chip;?
     
    #12 likes this.
  6. jamus

    Thread Starter Member

    Feb 11, 2013
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    Good news. Although the chip has the telltale burn mark in the center, it was not the source of the problem. Just a loose connection.
    As the saying goes "CHECK THE CABLES".

    Anyway, the chip was a PALCE22V10H-15PI/4, a programable logic device. If it had been dead, I would have been buying a new and expensive board.
     
  7. alfacliff

    Well-Known Member

    Dec 13, 2013
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    if the equipment is vsluable or important, find a way to copy the chip and any other programable chips as soon as you can.
     
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