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SN65DP141: support edp to dp?

hui zhou78
Prodigy 30 points

Part Number: SN65DP141

does the chip support edp to dp redriver?

or only support edp to edp, dp to dp.

Thanks

#Hui

  • 0
    TI__Expert 5455 points
    Hello Hui

    This device is not a protocol converter, this device is a linear redriver. Then you can consider that can support edp to edp or dp to dp because the signal that into the device will out with the factor of the redriver.

    Regards
    Francisco
  • 0 in reply to Francisco Javier Zamudio
    Prodigy 30 points
    Edp is based on Dp spec. don't need a converter.
    I plan to connect DP related signals of eDP(lanes,aux, hpd) to the re-driver (this means ignore backlight signals of eDP)
    like: GPU(edp)->DP141->DP connecter

    Can i do it w/ DP141?

    #Hui
  • 0 in reply to hui zhou78
    TI__Expert 5455 points
    Hello Hui

    Yes, you can do it. For Aux and HPD, these connections are externals, take a look at page 23 in our application diagram.

    Regards
    Fracisco
  • 0 in reply to Francisco Javier Zamudio
    Prodigy 30 points

    Hi Fracisco,

      In DP1.3 spec, table D-3: DP main-link TX silicon parameters, say VTX-DIFFp-p-Level0 is w/   0.34v(min), 0.4v(nom),0.46v(max)

      in edp1.4a spec, table 4-1:recommended tp1 differential signal voltages, say Differential Peak-to-Peak Output Voltage 0 is w/ nominal Vdiffp-p 200mv

      In a nutshell, the input lane voltage(edp) is different w/ the required output lane signal(DP).

      How to address the different AC spec of edp to DP w/ the DP141? use GAIN?

      What special edp support of DP141 can offer?

    Best regards

    #Hui

  • 0 in reply to hui zhou78
    TI__Expert 5455 points
    Hello Hui

    Please, let me know if my understand is correct.
    If you want to use the DP connector as source, then you will have to consider be in the Level 1 because our DP141 has an Vout of 600 mV, you can also increase this voltage level to 1200 mV.
    On the other hand, if you want to have a sink connected to our DP141, according to the DP1.3 spec, you have to have the data of the RX, depending on the High Bit Rate or Reduced Bit Rate and the minimum voltage are 120 mV for HBR and 40 mV for RBR, then we are inside of the spec.

    Please, let me know if this information is useful for you also let me know if you have any questions.

    Regards
    Francisco