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TUSB1002EVM: TUSB1002EVM

Damodaran Nagarajan
Prodigy 80 points
Other Parts Discussed in Thread: TUSB1002EVM

art Number: TUSB1002EVM

Cannot see USB 3.0 bandwidth speed after the re-driver.

Hello, my setup is:

Host PC ------>(USB A to USB B cable 1.5 m)--------->TUSB1002EVMRe-driver------------> (USB A to USB MicroB cable 1.5 m)-------------------> USB 3.0 CAMERA

I've tried USB 3.0

I've also tried different jumpers configuration for the EQ and Config

I almost tried (J1, J2, J3, J4) in 256 different jumper configuration with keeping jumper setting constant for CFG1=R & CFG2=0. Refer Fig-0

   

But the behaviour is always the same: I can’t get transfer rates over 48 MB/s. Check reference image Fig-1 & If I connect without repeater with 1.5meter & 3meter usb3.0 cable getting required bandwidth speed check reference image Fig-2.

Host PC ------>(USB A to USB B cable 1.5 m)--------->TUSB1002EVMRe-driver------------> (USB A to USB MicroB cable 1.5 m)-------------------> USB 3.0 CAMERA

Host PC ------>(USB A to USB MicroB cable 3 m)-------------------> USB 3.0 CAMERA

 

Note that with USB 3.0 windows advises that the device can be connected to SS port.( it is already connected to SS port)

So I'm out of ideas to figure out how to see a device behind this re-driver working successfully at 3.0 Mode.

Thanks in advance for the answers.

  • 0
    TI__Guru**** 150175 points

    Damodaran

    Instead USB3.0 camera, do you have a USB3.0 thumb drive that you can plug directly into the EVM and verify the throughput? I want to verify the EVM is functional first.

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 80 points

    Thanks for your Reply 

    I have tried connecting USB3.0 harddisk with and without redriver board (TUSB1002EVM) speed of transfer rate is getting around 124MB/s in both condition  refer Fig 1 & 2

    Fig-1

    Fig-2

    If I connect USB3.0 Camera module it is not getting enough bandwidth speed Instead of 450MB/s it is getting only 48MB/s which is working in USB2.0 speed.Refer Fig 1 & 2

    With Redriver Module Connected Fig-1


    Without Re-driver Module Connected Fig-2

    I have tried with two different Camera  module it is working in same speed of USB2.0 with redriver board.

    For our applicaion we use High speed USB3.0 camera,So please help to work with re-driver module.

    Thanks,

    Damodaran

  • 0 in reply to Damodaran Nagarajan
    TI__Guru**** 150175 points

    Damodaran

    Do you have a way to check if the camera is enumerated successfully at USB3.0? 

    Would you please modify the EVM by placing 220k pulldown resistor on both RX1P and RX1N? This is changing the termination structure and see if it will help enumerating the camera at USB3.0

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 80 points

    Thanks a lot. It works after adding 220K Pull down resistors in RX1P and RX1N.