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Need information on ASIC revision

Todd Wiley
Prodigy 10 points

We are using the Tag-it HF-I Plus (TMS37112) in an application and are suddenly having problems reading and writing with a new batch. Upon investigating, we discovered a version change when we read the tag. The previous working listed:

ASIC Version 128

While the new non-working tags list:

ASIC Version 129

For the sake of our internal investigation and to eliminate this difference as a possible root cause, can someone provide some insight on what changed in the revision?

Todd Wiley

Sr. Quality Engineer

Siemens Healthineers

  • 0
    TI__Prodigy 160 points

    Hello Todd,

    Thank you very much for reaching out.

    Would you pls elaborate a bit more on the read-out (differences)? Is that reading done via software? Is that written/printed somewhere on a tag/label/...? Background for my questions is that "ASIC Version 12x" is an unknown tracking nomenclature to us.

    Best regards

    Christian Butz

  • 0 in reply to Christian Butz
    Prodigy 10 points

    Hi Christian, thank you for your reply. I've attached pictures here of the two readings. Maybe this has nothing to do with the tag?

  • 0 in reply to Todd Wiley
    TI__Prodigy 160 points

    Hi Todd,

    Thank you very much for the pictures - they bring more light into this :-)

    The screenshots show that BOTH tags can be read - otherwise there should be nothing visible on the screen for the 129-tag. It looks as if the "ASIC Version" refers to the corresponding hex-value in the "Tag ID": Bytes 4 and 5 from the left show the same values (in hex) as the "ASIC Version". These bytes are the product ID.

    Because 0x80 can be used in your application, but 0x81 not, there are several possibilities for that:

    • Your reader/software only allows tag type 0x80 to be used. Other tag types seem to be "blacklisted". Could you pls check that?
    • Reading is working, but writing not (if I understand it right from the 1st post); therefore is is also possible that tags with 0x81 are locked.

    One additional question: Form factor wise, do both tags look the same?

    I hope this helps to narrow down the issue further. Please let me know how it goes.

    Best regards

    Christian