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SN65DPHY440SS: Re-timer for eDP interface

Lin Jody
Prodigy 20 points
Part Number: SN65DPHY440SS
Other Parts Discussed in Thread: SN65DP141, SN65DSI86-Q1,

Hi:

Please provide correct re-timer for eDP interface application. The following is our application.

          MIPI DSI                                                         Cable (50ohm)=50cm                                                            MIPI DSI      

CPU -------------->MIPI to eDP IC ----> Re-timer IC----------------------------------> Re-timer IC ----> eDP to MIPI IC --------------> Monitor 

     

  • 0
    TI__Guru**** 177071 points

    Hi,

    For MIPI to eDP, please take a look at the DSI86. 

    We do not have eDP retimer, we do have eDP redriver, DP141 or DP142.

    We do not eDP to DSI solution.

    Thanks

    David

  • 0
    Prodigy 20 points

    Q1:If SN65DP141 uses 50ohm network cable to transmit data, it is most often a few meters?

    Q2:For SN65DP141, Whether input and output accept swing for 400mV, 600mV, and 800mV?

  • 0 in reply to Lin Jody
    TI__Guru**** 177071 points

    Hi,

    Is the network cable going to be fixed? The DP141 is a linear redriver, so it is best to put the cable before the DP141 and let the DP141 RX EQ to compensate for the loss of the network cable if the cable is fixed. 

    The DP141 linearity range is 1.2V, so it will accept 400, 600, and 800mV input.

    Thanks

    David

  • 0
    Prodigy 20 points

    Hi:

    Q1. The following is our connection process. Is it ok from SN65DSI86-Q1 to 2nd SN65DP141?

             MIPI DSI                                             1st          Coxial Cable (50ohm)=50cm        2nd                                            MIPI DSI      

    CPU -------------->SN65DSI86-Q1 ----> SN65DP141---------------------------------------> SN65DP141 ----> eDP to MIPI IC --------------> Monitor 

    Q2.How many meters can SN65DP141 support  for caxial cable length?

    Q3.Are SN65DSI86-Q1 and SN65DP141SN65D compatible?

  • 0 in reply to Lin Jody
    TI__Guru**** 177071 points

    Hi,

    Q1. The following is our connection process. Is it ok from SN65DSI86-Q1 to 2nd SN65DP141?

             MIPI DSI                                             1st          Coxial Cable (50ohm)=50cm        2nd                                            MIPI DSI      

    CPU -------------->SN65DSI86-Q1 ----> SN65DP141---------------------------------------> SN65DP141 ----> eDP to MIPI IC --------------> Monitor 

    *** Yes, depends on the data cable loss and the data rate, you may not need the 1st DP141.

    Q2.How many meters can SN65DP141 support  for caxial cable length?

    *** It depends on the data rate and the loss of the coaxial cable, the max compensation the DP141 can support is 15dB.  

    Q3.Are SN65DSI86-Q1 and SN65DP141SN65D compatible?

    *** Yes

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 20 points

    Q1. Based on the design guideline of SLLA343.pdf for SN65DSI86-Q1 which has desripiton the maximum trace length over FR4 between SN65DSIX6 and the GPU is 25 – 30 cm. It seems need 1st SN65DP141. Is it right?

             MIPI DSI                                             1st          Coxial Cable (50ohm)=50cm        2nd                                            MIPI DSI      

    CPU -------------->SN65DSI86-Q1 ----> SN65DP141---------------------------------------> SN65DP141 ----> eDP to MIPI IC --------------> Monitor 

    Q2.Based on datasheet of SN65DP141 which has description four-channel linear equalizer
    optimized for use up to 12 Gbps. If the data rate of eDP is 12 Gbps, can the string SN65DP141 meet the requirements of coxial cable (50ohm) = 50cm.? or it can reach coxial cable=100cm?

  • 0
    Prodigy 20 points

    Hi:

    Q1. How amplitude is MIPI DSI swing after adding SN65DPHY440SS? How many cm can be transmitted by coaxial cable (50ohm)? The coaxial cable transmitted 6Gbps data rate. 

    Q2.Should the SN65DPHY440SS be added before or after the coaxial cable? Or should the SN65DPHY440SS be added before and after the coaxial cable?

              MIPI DSI                                    Coaxial Cable (50ohm)=50cm                                       MIPI DSI      

              200mVp-p                              ?mVp-p            ?cm                                                         200mVp-p

    CPU -------------->SN65DPHY440SS-------------------------------------------> SN65DPHY440SS --------------> Monitor 

  • 0
    Prodigy 20 points

    Hi:

      Q1:Does TI have suitable MIPI DSI to DP IC and DP to MIPI DSI IC?

  • 0 in reply to Lin Jody
    TI__Guru**** 177071 points

    Hi,

    Q1. Based on the design guideline of SLLA343.pdf for SN65DSI86-Q1 which has desripiton the maximum trace length over FR4 between SN65DSIX6 and the GPU is 25 – 30 cm. It seems need 1st SN65DP141. Is it right?

             MIPI DSI                                             1st          Coxial Cable (50ohm)=50cm        2nd                                            MIPI DSI      

    CPU -------------->SN65DSI86-Q1 ----> SN65DP141---------------------------------------> SN65DP141 ----> eDP to MIPI IC --------------> Monitor 

    *** If the distance between the DSI86 and the DP141 is longer than the 25-30cm, then you would need to add the 1st DP141.

    Q2.Based on datasheet of SN65DP141 which has description four-channel linear equalizer
    optimized for use up to 12 Gbps. If the data rate of eDP is 12 Gbps, can the string SN65DP141 meet the requirements of coxial cable (50ohm) = 50cm.? or it can reach coxial cable=100cm?

    *** It depends if the loss of the coaxial cable is within the compensation range of the DP141. If it is within the DP141 RX EQ supported range, then the DP141 can support it.

    Q3. How amplitude is MIPI DSI swing after adding SN65DPHY440SS? How many cm can be transmitted by coaxial cable (50ohm)? The coaxial cable transmitted 6Gbps data rate. 

    *** The max data rate the DPHY440 can support is only 1.5Gbps, it can't support 6Gbps.

    Q4.Should the SN65DPHY440SS be added before or after the coaxial cable? Or should the SN65DPHY440SS be added before and after the coaxial cable?

              MIPI DSI                                    Coaxial Cable (50ohm)=50cm                                       MIPI DSI      

              200mVp-p                              ?mVp-p            ?cm                                                         200mVp-p

    *** I would add the DPHY440 after the cable so the DPHY440 RX EQ can compensate for the cable loss. 

    CPU -------------->SN65DPHY440SS-------------------------------------------> SN65DPHY440SS --------------> Monitor 

      Q5:Does TI have suitable MIPI DSI to DP IC and DP to MIPI DSI IC?

    *** MIPI DSI to DP -> DSI86

    MIPI DP to DSI -> Unfortunately we do not have a solution.

    Thanks

    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 20 points

    Hi:

    Q1. The following is our data rate of MIPI DSI. Does TI have suitable a re-timer to replace with SN65DPHY440SS?

      (2560X2560X60fpsX24bpp)/4=2.359Gbps per lane 

  • 0 in reply to Lin Jody
    TI__Guru**** 177071 points

    Hi,

    Unfortunately we do not have a MIPI retimer that can support this data rate.

    Thanks

    David 

  • 0 in reply to David (ASIC) Liu
    Prodigy 20 points

    Q1:SN65DP141 only supports 12Gbps four lanes, right?

    Q2:Does TI have an eDP re-driver greater than 12Gbps?

  • 0 in reply to Lin Jody
    TI__Guru**** 177071 points

    Hi,

    The DP141 supports 12G per lane, why do you need a eDP redriver that supports more than 12G?

    Thanks
    David

  • 0 in reply to David (ASIC) Liu
    Prodigy 20 points

    Hi:

      I thought SN65DP141 has four channels with a total of 12Gbps, so I asked if there is a re-driver greater than 12Gbps.

  • 0 in reply to Lin Jody
    TI__Guru**** 177071 points

    Hi,

    No, it is 12G per lane, so the bandwidth is sufficient as a eDP redriver.

    Thanks

    David