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May DS90UB913 can support 1920x1080p 30 frames?

Chen Bogey8
Mastermind 9990 points

Dear Sir

Good days,

May we check with you if DS90UB913 can support 1920x1080p 30 frames?

As we know DS90UB913 support 10~100M pixel colock .

from as below formula ==>Pixel Clock = H-pixels x V-pixels x Fps* x (1 + Percent Blanking**)

Here i let  (1 + Percent Blanking**) = 1.4

and calculate 1920x1080x30 x1.4 around 87M pixel clock, i think  DS90UB913  should be ok, but may you pls help double check?

 

                                                            Best Regards,

                                                                        Bogey

  • 0
    TI__Genius 13475 points

    Bogey

    Probably not.   If we look at  10 bit, 4:2:2 data encoded according to SMPTE 274M, then you would need a parallel clock rate of 148.5MHz, so the DS90UB913 would not work.   It may be possible to encode the data in another way, such that you use fewer bits per pixel, in order to allow getting the stream through.

    Another option would be to consider another SerDes part.  The DS90UB925/926 has a lower max clock rate at 85 MHz, but with a 24 bit width, could transport an entire pixel on each clock cycle, so it could support your 1080P30 with some margin.   With 24 bits, you could either send the data as RGB with 8 bits each, or a 20 bit word, encoded 4:2:2 as in SMPTE 274M.

    Mark

     

     

  • 0 in reply to Mark Sauerwald88474
    Mastermind 9990 points

    Dear Sir

    Many thanks for your reply,

    My customer is use AR0331 sensor and transfer is raw data only. Is there different between deliever "raw data" and "4:2:2 data encoded "?

    Is there have formula to calculate DS90UB913 and DS90UB925 capability? (may you pls have example?)

                                                        Best regards,

                                                                           Bogey

     

  • 0 in reply to Chen Bogey8
    TI__Genius 13475 points

    I believe that the AR0331 interface is 12 bits wide at 74.25MHz, which means that the DS90UB913/914 could be used for this sensor, but I cannot confirm since I do not have access to a copy of the Aptina datasheet for this sensor.

     

    The DS90UB913/914 operates in either 10 bit or 12 bit modes, and in 10 bit mode it can support up to 100MHz parallel clock, for 12 bit mode up to 75MHz.

     

  • 0 in reply to Mark Sauerwald88474
    Mastermind 9990 points

    Dear Sir

    Many thanks for you reply,

    May we check with you what is L1(COILCRAFT_KA4909) function that show in "http://www.ti.com/lit/ug/snlu110/snlu110.pdf" ?

    May we remove it?

                                     Best regards,

                                                    Bogey

     

  • 0 in reply to Chen Bogey8
    TI__Expert 7395 points

    Hi Mr. Chen,

    The L1, L3 (COILCRAFT_KA4909) is a differential choke used in the power feed network to combine power over FPD-Link III interface. It’s not required if you don’t plan to implement this feature.

    Dac Tran

    SVA APPS