scanning for VLSI

Discussion in 'Homework Help' started by vead, Jun 16, 2014.

  1. vead

    Thread Starter Active Member

    Nov 24, 2011
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    I am little bit confused about scanning

    VLSI chip testing is done in several different places by different type of people .

    scan in vlsi circuit used for testing VLSI circuit

    Can anyone give some example ,
    I mean If we are going to make micro controller, how we will scan circuit
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,179
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    I'm not sure, but I think you are referring to the following:

    http://en.wikipedia.org/wiki/Boundary_scan

    You keep omitting critical details and words from your posts. Would it kill you to write out coherent questions with all of the critical words included?
     
  3. vead

    Thread Starter Active Member

    Nov 24, 2011
    621
    8
    generally we scan PC to determine the virus

    we scan vlsi circuit to determine fault

    but what type of fault is determine by scanning
     
  4. Papabravo

    Expert

    Feb 24, 2006
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    Did you read the article? All bets are off until you do that and specify that it is what you mean by "scanning" when it comes to hardware on a chip.
     
  5. Brownout

    Well-Known Member

    Jan 10, 2012
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  6. MrCarlos

    Active Member

    Jan 2, 2010
    400
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    Hello vead

    Well:
    From this point of view: We scan PC to determine the virus.
    We scan VLSI circuit to determine fault.

    Like:
    Open Resistors, coils, capacitors etc.
    Failures in operational amplifiers, logic gates, transistors Etc.
    open wires (tracks).
    But also:
    Operational amplifiers that do not meet their specifications as: propagation delay, slew rate, frequency response, etc..

    In other words: We scan the VLSI to discover if they have any fault against their datasheets.
    or:
    If they meet the parameters established In its data sheet.
     
    vead likes this.
  7. Papabravo

    Expert

    Feb 24, 2006
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    We can assume and infer all we want, but until the OP can pose a well formed unambiguous question we are just producing a lot of hot air.

    He might mean scanning with an electron microscope or positron beams or some other exotic gee-gaw.
     
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