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TPS65982 with "Type-C to Type-A receptacle cable"

K.Yaita
Guru 29720 points

Other Parts Discussed in Thread: HD3SS460, TPS65982, TPS65986EVM, DP-EXPANSION-EVM

Hi TI members,

My customer is designing Tablet PC and evaluating his board that TPS65982+HD3SS460 is mounted.
He said USB3.0 flash memory was detected as USB2.0 (High speed) when "Type-C to Type-A receptacle cable" is used.

I tried to evaluate TPS65986EVM + DP-EXPANSION-EVM (the following constitution) to reproduce his issue and confirmed that same issue was occured.
I used iBUFFALO's Type-C to Type-A receptacle cable that supports USB3.1 in this case.



Just to tell you I set TPS65986EVM Configuration ID 1 (Notebook System) as the following.



Which register should I change to detect USB3.0 flash memory as USB3.0 (Super speed) correctly with "Type-C to Type-A receptacle cable"?
I can access TPS65986 registers with Aardvark, so I would like to know it.

Your prompt support is really appreciated because of my customer's design schedule.

Best Regards,
Yaita / Japan disty

  • 0
    Guru 29720 points

    I checked the voltage of HD3SS460 control, however these are no ploblem.
    --------------------------------------------------
    Enable (GPIO_0): 3.23V
    AMSEL (GPIO_3): 0V
    POL (GPIO_14): 3.22V *it is changed to 0V if TypeC is flipped
    --------------------------------------------------

    I also attached the evaluation environment as the following.


    Your support would be really appliciated.

    Best Regards,
    Yaita

  • 0 in reply to K.Yaita
    TI__Expert 6430 points

    Hi Yaita,

    I am personally testing this issue. Due to some technical issues couldn't finish the testing today. But hopefully will finish my testing tomorrow and will update you with the fix and reason for this issue.

    Thanks,

    Rahul

  • 0 in reply to Rahul Sharma16
    Guru 29720 points

    Hi Rahul-san,

    Thank you for your support.
    I will wait for your feedback.

    Best Regards,
    Yaita

  • 0 in reply to K.Yaita
    TI__Expert 6430 points

    Hi Yaita,

    As per the USB Type-C specification, you need to have an "Electronically Marked Cable" to enable USB 3.0 & USB 3.1. Generally of Type-C to Type-A converters don't are not electronically marked (no chip inside). That's the reason you do not see USB 3.0 communication because PD controller disables it as the converter cable is not electronically marked.

    Thanks,

    Rahul