Re: Microprocessor question

From: Joerg (notthisjoergsch_at_removethispacbell.net)
Date: 10/26/04 

Date: Tue, 26 Oct 2004 22:10:28 GMT

Hi Gary,

>1. Is there any way to do a quick check on a microprocessor to
>determine if it's "alive"? I realize manufacturers use million-dollar
>testers for functional testing, but is there a way to "generically" do
>a quick check on the bench using standard test equipment?
>
>
Tough. The only crude way I have used in the past is a coil placed on
top of it in a precisely repeatable position and looking at the
spectrum. But that is crude and only comparative. I just needed it to
see if something was running on it and to figure out if any of the
spectrum would be synchronous to noise I was chasing.

>2. Ditto for speed? How can one determine if a microprocessor will run
>at its marked speed on a bench?
>
>
Only via a full electrical test, since all its functions must keep up at
the rated speed.

>3. If there is a "generic" feature set that is common to most
>microprocessors, and what might that be?
>
>
For me it is the noise spectrum emitted from the enclosure and the lines
but that is different for every processor and circuit board. Kind of
like submarine guys who are able to determine what kind of vessel is
cruising above just from hearing its noise.

>4. How can one check for this - as far as hardware and software
>requirements?
>
>I guess I am looking for a "generic" test setup that can do something
>like a bare-bones electrical QC on different microprocessor families.
>
>
It'll be different for every processor and you would have to obtain the
QC procedure from the manufacturer, if they are willing to share it for
incoming QC purposes.

Regards, Joerg

http://www.analogconsultants.com

Relevant Pages

  • Re: Microprocessor question
    ... >a quick check on the bench using standard test equipment? ... But that is crude and only comparative. ... For me it is the noise spectrum emitted from the enclosure and the lines ...
    (sci.electronics.design)
  • Re: Microprocessor question
    ... >a quick check on the bench using standard test equipment? ... But that is crude and only comparative. ... For me it is the noise spectrum emitted from the enclosure and the lines ...
    (sci.electronics.components)
  • Re: Microprocessor question
    ... >a quick check on the bench using standard test equipment? ... But that is crude and only comparative. ... For me it is the noise spectrum emitted from the enclosure and the lines ...
    (sci.electronics.basics)
  • Re: Microprocessor question
    ... Is there any way to do a quick check on a microprocessor to ... > a quick check on the bench using standard test equipment? ... Buy it from a reputable supplier. ...
    (sci.electronics.design)