Boot | C31 | TMS320VC33 | VC33

Hello... I am having an issue with a TMS320C33 and I would appreciate
some guidance. I am using the TI utility c3xcheck.asm and it is
integrated into my boot-loader code. I am seeing failures at -30C to
-40C and the self check utility returns a failure code for "ALU Test
Integer Error".

Is there any way this can be related to anything external to the DSP?
I am having a hard time believing that an ALU error can be something
outside the chip. I have had some chips returned to TI for analysis
and they said they checked out fine, but something just does not seem
right.

Thank you for your assistance.

Glock

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> Hello... I am having an issue with a TMS320C33 and I would appreciate
> some guidance. I am using the TI utility c3xcheck.asm and it is
> integrated into my boot-loader code. I am seeing failures at -30C to
> -40C and the self check utility returns a failure code for "ALU Test
> Integer Error".

The C33 data sheet shows an industrial grade version spec'ed to -40C.  Is that
what
you have?  Or do you have the commercial grade?

> Is there any way this can be related to anything external to the DSP?
> I am having a hard time believing that an ALU error can be something
> outside the chip. I have had some chips returned to TI for analysis
> and they said they checked out fine, but something just does not seem
> right.

If your chips are not spec'ed to -30C, then results would be undefined.  A
failure
could manifest as anything... an ALU error, an internal memory error... who
knows.

-Jeff

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