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Original question:

TM4C1231H6PM: date codes and silicon revisions

TM4C1231H6PM: Silicon Revision / unqualified engineering samples

Jan Bock
Expert 3025 points
Part Number: TM4C1231H6PM

Hi Team,

My customer has procured various versions of the TM4C123 controller due to the current allocation situation.
Among other things, it has now been noticed that controllers of version 6 are described as "unqualified Engineering Sample" DID1 registers.

They have the following questions:

1. Are all controllers that do not have 7 in the order code automatically version 6?
2. Are all controllers of version 6 produced as "unqualified engineering samples"?
3. Are the components declared as "unqualified engineering samples" excluded from sale?
4. The TI logo is printed on the chips. But there are also parts without TI logo. Is this a distinguishing feature that it is an engineering sample?

The problems with the EEPROM in version 6 are known and are circumvented with a workaround.

Register DID0, DID1 (Version 6)

Thanks 

Jan

  • +1
    TI__Guru*** 135355 points

    Hello Jan,

    Jan Bock said:
    2. Are all controllers of version 6 produced as "unqualified engineering samples"?

    The DID1 field for Revision 6 silicon is subject to an errata item. It incorrectly indicates that the device is not qualified but all TM4C Revision 6 devices are qualified. Please show the customer our errata for SYSCTL#20: https://www.ti.com/lit/pdf/spmz849

    Jan Bock said:
    1. Are all controllers that do not have 7 in the order code automatically version 6?

    Yes.

    Jan Bock said:
    3. Are the components declared as "unqualified engineering samples" excluded from sale?

    Yes, we do not ship anything that is not qualified for Rev 6.

    Jan Bock said:
    4. The TI logo is printed on the chips. But there are also parts without TI logo. Is this a distinguishing feature that it is an engineering sample?

    This hasn't come up before so I am not entirely certain on the reason for the change but I imagine it was an update to the device markings with Rev 7 to align with TI standards. Regardless of the full backstory, what I can say for sure is that it has nothing to do with engineering samples - pre-production/unqualified devices would be marked XM4C not TM4C.

    Best Regards,

    Ralph Jacobi