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TUSB564: DP1.4 / CTS test fail

Tony Wu
Prodigy 60 points

Part Number: TUSB564

Please find attached file, we use TUSB564(include redriver) for USBC(DP) to LT6911(CSI bridge).

LT6911 vender help us testing DP1.4(CTS) function and result has serval fail items. I also attached failure report. we want to adjust EQ(hardware,resistor) to improvement and fix these issue.

Could you help to review and recommend what the resistors can use? Thanks a lot. 

0806.zip

TI_TUSB564_MUX schematic_20260806.pdf 

  • 0
    TI__Guru 64886 points

    Hi Tony,

    I'm reading through some of the tests and the fails dont make sense to me. 

    For example 20mHz SJ RBR Lane 0 (TP2) does not have any bit errors, but is labeled as a fail.

    In the schematic, I see that we are GPIO mode, and ass the EQ registers are set to F. This may lead to overcompensation of the signal.

    Can you provide an approximation of the pre-channel and post-channel losses. This will help us tune the EQ for your system.

  • 0 in reply to Vishesh Pithadiya
    TI__Guru 64886 points

    Hello,

    Closing thread due to inactivity. If you have any follow-up questions or concerns, feel free to reply.