>> Why do you want to do this?

To comply with the UL1998 requirement, I need to test the integrity of the
ROM. The chip that I am using is not capable of accessing program memory.
Therefore the UL engineer told me that I can perform instruction set test
instead. But he didn't tell me how to do it.

Do I have to test ALL instructions? Or just the ones that I use in my
program?

Thanks,
Tony


----- Original Message -----
From: "Olin Lathrop" <olin_piclist@EMBEDINC.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Tuesday, August 20, 2002 11:11 AM
Subject: Re: [PIC]: What's "instruction set test"?


> >Can someone tell me what's instruction set test?
> >
> >It is supposed to be the execution of a set of instructions to verify if
> the
> >result of the instructions match a known value. If it doesn't, it
indicates
> >the program has corrupted.
>
> Why do you want to do this?  Performing an instruction test on a single
chip
> micro seems rather pointless to me.  Instruction tests used to be popular
> back when a computer was on a bunch of boards and there could be failurs
> inside the CPU.  The likelyhood of blowing an individual transistor inside
> the CPU of a single chip micro is vanishingly small.  When chips go bad,
it
> is usually the I/O drivers, power related, or in the case of some PICs the
> flash could wear out.
>
>
> *****************************************************************
> Embed Inc, embedded system specialists in Littleton Massachusetts
> (978) 742-9014, http://www.embedinc.com
>
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