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TUSB1044: Application issues of chips

Tonyx.wu
Genius 3205 points
Part Number: TUSB1044
Other Parts Discussed in Thread: TUSB1146

1.Can the functions in the following schematic be achieved？

2. The principle of chip operation and how to compensate for gain？

3. Is there any application scenario? If there is no loss on the USB3.2 line, will there be any harm to using this chip?

4. How to debug? By observing changes in eye image quality or what?

When the chip is not working, is it connected? Will it affect the normal operation of USB when it is not working?


Because of this chip, we have never used it before, and now we encounter a problem with using the Zhanrui platform, which is USB video output. They say that we must add a redriver to achieve the maximum speed

  • 0
    TI__Guru**** 165001 points

    Hi,

    1. I don't see an issue with using re-driver in this particular case.

    2. A red-river is a mostly analog reach extension device designed to boost the high-frequency portions of a signal to counteract the frequency-dependent attenuation or inter symbol interference (ISI) caused by the interconnect.

    3. There will always be some loss from the package, system board, connectors and so on. It is important to pick a re-driver equalizer that compensates the loss as close as possible.

    4. To debug, you can break the system into several pieces. 

    a. PD -> Does PD successfully negotiated video Alt Mode over USB Type-C interface?

    b. Video Sideband Signal (if exists), is link training (assume link training is supported) successful?

    c. Main link -> Electrical compliance testing, are you passing the main link electrical compliance testing?

    d. Main link lane order -> Is the lane order correct per the USB Type-C Alt Mode spec?

    Thanks

    David 

  • 0 in reply to David (ASIC) Liu
    Genius 3205 points

    1.When the chip is not working, is it connected? Will it affect the normal operation of USB when it is not working?

    2.Is this a two in one system that supports USB and DP? We still have a requirement to insert and use TYPEC and DP simultaneously, as shown in the following figure. Can we meet this requirement?

    Simply put, it means that Type-C and DP interfaces are inserted and used simultaneously

  • 0 in reply to Tonyx.wu
    TI__Guru**** 165001 points

    Hi,

    1.When the chip is not working, is it connected? Will it affect the normal operation of USB when it is not working?

    The data will not pass through the re-driver when it is not working.

    2.Is this a two in one system that supports USB and DP? We still have a requirement to insert and use TYPEC and DP simultaneously, as shown in the following figure. Can we meet this requirement?

    Simply put, it means that Type-C and DP interfaces are inserted and used simultaneously

    Both DP and USB data will map to the USB Type-C connector. If you want to support both DP and Type-C, you would need to put a DP hub between the DP source and the re-driver. You will also use TUSB1046 or TUSB1146 for this design.

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Genius 3205 points

    Does this DP HUB have a specific part number?

    When we use it simultaneously, DP and USB do not run the same route. DP uses SS2 and USB uses SS1. Can I omit this HUB and what exactly does it do?

  • 0 in reply to Tonyx.wu
    TI__Guru**** 165001 points

    Hi,

    You can take a look at KTM5010 and see if it is possible to use it. 

    I am assuming you are planning to have DP over USB Type-C. In this case, you can't have DP signal across both Type-C and DP at the same time, this is why I suggested you would need a DP hub in my previous response. If you don't plan to have DP over Type-C, then you don't need the hub.

    Thanks

    David