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DS34RT5110 in DVI-D application, Layout Recommendations?

Dave Sharpe
Prodigy 140 points

Other Parts Discussed in Thread: DS34RT5110, DS22EV5110, TFP410

DS34RT5110 has all the stuff I need for a DVI-D application. Several questions that I need some answers to resolve.

The plan is/was to use DVI-D (standard) interface (not HDMI)

1> Could not happen but notice that the output differential pairs do not permit smooth transition to the output connector.. IE the pairs are crossed over. Not idea, what is the thought process here?

2> What (if any) is the recommended layout routing to/from a standard DVI-D connector to the DS34RT5110

3> Is there any issue with swapping differential channels relative to DVI, or as long as the path is maintained INx to Outx it's fine.. IE the part does not differentiate between the R/G/B data channels.

4> What is the maximum specified differential skew per Clock & Data channels.. (not between them, the skew of each differential pair, IE thow shall not exceed x ns or x distance of one path of the differential pair being slightly longer/shorter than it's other half).

5> Is there any test data in support of, or not, of high speed common mode filtering of the/each differential pair.

This should keep you busy.. Thanks in advance.. I'm trying to get my board done this week, so a quick response would be super appreciated.. Thanks

-DS

  • 0
    TI__Genius 13475 points

    Dave

    Thanks for the work!   Give us a bit of time to get back to you.

    Mark

     

  • 0
    Prodigy 20 points

    Dave,

    You have answers for your questions?

    It is possible to make "double-inversion" of data lines only (wire inverse at input and wire inverse at output) ?

    What difference between DS22EV5110 and DS32RT5110 (what does mean hop-capability) ? 

    Can I receive data by DS22EV510 from another DS22EV510?

    Vladimir

  • 0 in reply to Vladimir Glavny
    TI__Genius 13475 points

    If you have control over both ends, feel free to do a double inversion.

    The DS22EV5110 is rated up to 2.25Gbps, the DS34RT5110 is rated to 3.4Gbps, so the DS34 part will support higher screen resolutions.

    Yes, a DS22EV5110 can receive the signal from another DS22EV5110, however in cascaded situations, I would suggest the use of the DS34RT5110 since the PLL is better and you will have lower jitter

     

    Mark

  • 0 in reply to Mark Sauerwald88474
    Prodigy 20 points

    Thanks, Mark

    You are right. I checked that inversion doesn't break a synchronization patterns of TMDS (sync codes are complemented for inversion).

    These double inversions allow to make connections of DS22/DS34, TFP410 and the DVI connector very simple (if the lane of data D0 and D2 exchanged twice).

    I am right, what the clock line can be inverted any number of times (even or odd), without affecting procedure of recovery?

    Vladimir