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TUSB8040A EVM work with USB2.0 mode...

Peter Tseng
Mastermind 6440 points

Other Parts Discussed in Thread: TUSB8040A

Dear sirs,

My customer feedback that they test USB3.0 devices with TUSB8040A EVM but found some devices only work with USB2.0 mode.

Please give me some directions that where and what should I check for this issue!

Thanks. 

  • 0
    TI__Guru 60870 points

    Hi Peter,

    Please provide more information on which devices are dropping to USB 2.0 mode?  Can you confirm if the power supply for the hub is 3A @ 5V?  If a 1A @ 5V power supply is used, the downstream ports may drop off and reconnect at the slower USB 2.0 speeds.

    Regards,

    Julie

  • 0 in reply to JMMN
    Mastermind 6440 points

    Hi Julie,

    Customer used device is Asix USB3.0 Giga LAN, and Transcend USB3.0 HDD!

    About the power supply, I will check again!

    Besides the power issue, are there any other points for checking?

    Thanks. 

  • 0 in reply to Peter Tseng
    TI__Guru 60870 points

    Hi Peter,

    We have done a lot of testing with Transcend USB 3.0 HDD and there is no issue.  Can you confirm that the USB 3.0 Host controller has loaded the USB 3.0 hub drivers correctly?  If you send a screen capture of device manager with the USB portion expanded, I can check it for you.  I have orderd the Asix device for testing.

    Regards,

    Julie

  • 0 in reply to JMMN
    Mastermind 6440 points

    Dear Julie,

    Thanks for your information.

    I will check them with customer.

    BTW, as customer feedback, TUSB8040A will be only usb2.0 after reboot/hibernate under Intel usb3.0 host of IVY bridge!

    Did you has been test with same condition?

    Thanks. 

  • 0 in reply to Peter Tseng
    TI__Guru 60870 points

    Peter,

    We saw this issue with an early version of the intel driver, it was fixed with a later version.  Can you confirm the Intel driver revision that is failing?

    Regards,

    Julie

  • 0 in reply to JMMN
    Mastermind 6440 points

    Julie,

    May I have your email address?

    I get customer test result and I think you can reference it.

    Thanks.

  • 0 in reply to Peter Tseng
    TI__Guru 60870 points

    Hi Peter,

    Sure, you can send me an email at swat@list.ti.com and I will respond directly.

    Regards,

    Julie

  • 0 in reply to JMMN
    Mastermind 6440 points

    Dear Julie,

    I had no authority to send mail to this account!

    Here are the brief description for the result.

    Customer use Acer 4750G NB which USB3.0 host is Renesas and O.S is WIN7.

    After checked with customer, they had test with latest host driver and BIOS version.

    And the issue is:

    NB#1 Acer 4750G
    O.S Win7
    System USB3.0 Host Renesas
    Host driver version V2.1.39.0
    Host driver date 2012/8/21

    Test items Test result
    Shutdown and reboot a. Hub cannot be detected
    b. all USB3.0 devices miss
    c. only pen drive can be found
    Sleep Pass
    Restart Pass
    Hibenate Giga LAN dongle miss

    Did you try to duplicate with the configuration and result?

    Thanks.

  • 0 in reply to Peter Tseng
    TI__Guru 60870 points

    Hi Peter,

    We are now tracking this issue directly, not through the E2E forum.  The dongle has been delivered and we are setting up a system test for further debug.

    Contact me through USB3_Support@ti.com  if you have not been included on the direct email thread.

    Regards,

    Julie