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TUSB546-DCI: TUSB546 SUPPORTS ONLY IN DFP MODE

vijaya lakshmi47
Prodigy 60 points
Part Number: TUSB546-DCI
Other Parts Discussed in Thread: TUSB564

Hi,

As TUSB546 datasheet says, it supports only DFP mode. Its for DP lanes alone or both USB as well as DP lanes?

In our case, we want Dual Role Data(DRD) for USB and DFP for Display port.  can I use this IC (TUSB546)?? In datasheet, the functional block diagram shows USB lines has Redriver circuit in both upstream and downstream side. there the confusion starts.

One more query is ,the below image which we have taken from TUSB546-DCI datasheet has TUSB564-DCI chip used at SINK side (UFP) but we didn't get any information in TI website with respect to that chip.

If anyone knows answer, you are welcome!!!

Thanks in Advance!

  • 0
    TI__Mastermind 36085 points
    Hello Vijaya,

    The case you are interested is correct. You can use the TUSB546 as Dual role for USB, as long as you are capable to switch the SSTX/SSRX lines between a Host or a device (some customers switch the USB path between upstreamport and downstreamport from a USB HUB). But the DP lines aro only for Sourcing DisplayPort video. Regarding the TUSB564, the device hasn't been released yet, that's why you can't find more about it on our website.

    Regards,
    Diego.
  • 0 in reply to Diego Cortes
    Prodigy 60 points

    Thanks Diego for your quick reply!!!

    Do you know anything about pin assignments A, B, C, D, E and F from VESA Display port alt mode on Type-C.

    In one of the TI application note, PD alternate mode-Display port(slva844a. Pdf) they have mentioned VESA specification in Table-1.

    Since TUSB546 supports only C, D, E and F,  we want to know what that A & B pin configuration, GEN2_BR?

    Can you please tell us what that cable type and displayport signaling means...

  • 0 in reply to vijaya lakshmi47
    TI__Mastermind 36085 points

    The A & B pin configurations have the only difference is that both configurations are intended for 10Gbps DisplayPort data rate, this means that the DP information will be transmitted using the USB3.1 generation 2 electrical parameters. The TUSB546 was designed for USB3.1 Gen1, so it cannot work with the A & B configurations.

    I am not familiar with this DP configurations but it should be hard to find any DP sink device that supports 10Gbps, since the released DP spec has HBR3 as the maximum bit rate (8.1Gbps).

    Regards,

    Diego.

  • 0 in reply to Diego Cortes
    Prodigy 60 points

    Thank you Diego for your Quick reply!!!