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TUSB211: condition of activate/ deactivate

K.Shidara
Expert 3225 points
Part Number: TUSB211


Hi Team,

Would you advise that

What USB operation does TUSB211IRWBR use to activate / deactivate the waveform conditioner?

Thanks,

Best regards,

Shidara

  • 0
    TI__Guru**** 180061 points

    Shidara-san

    The TUSB211 is a USB High-Speed (HS) signal conditioner, so it will only compensate HS signals while bypass the LS/FS signal.

    Please consider other TUSB21x depending on the system application, you can find more info in this app note: .

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    TI__Expert 3225 points

    Hi David-san

    Thanks for your prompt reply. HS signal is seemed to be applied.

    Because the customer is facing below situation, What can be the reason?

    > ------------------------------------------------- -
    > [USB2.0]
    > If you start the test with the fixture inserted,
    > The conditioner is working,
    > If the fixture is inserted after the test starts, the conditioner is not working.
    > The situation is the same no matter how many times it is inserted.
    > ------------------------------------------------- ---

    Any advice should be highly appreciated.

    Thanks

    Best regards,

    Shidara

  • 0 in reply to K.Shidara
    TI__Guru**** 180061 points

    Shidara-san

    When taking the eye-diagrams, the device detects the termination of the test fixture to scope which is uniquely different from a host or device. This is needed to enable the high-speed boosting for testing. 

    The proper USB compliance procedure needs to be followed, and it is documented in section 5 of the app note I sent to you in my previous response. 

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    TI__Expert 3225 points

    David-san

    Thank you so much for your strong support always.

    I'll close this thread.

    Thanks

    Best regards,

    Shidara