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DM6446 - 810 MHz processor VPBE video output capability

Hitesh Gambhava
Prodigy 205 points

Hi,

From below link i came to know that DM6446 is also capable to capture and display HD videos.

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/99/p/65320/235926.aspx#235926

 

In my application i have to play storage HD video on LCD display .

LCD display has VGA i/p , so i have to convert that storage HD video into PC graphics resolution (VESA standard)1280X800@60 Hz (83.46 MHz).

So if i use DM6446-810 MHz processor which has 108MHz pixel clock capability, then will it serve my purpose or not ?

ofcourse i have to use DAC after this digital video o/p.

Let me correct if my understanding is wrong.

 

Thanks

Hitesh

 

  • 0
    TI__Mastermind 43875 points

    Hitesh,

    Depending on what blanking times you use for the 1280x800 mode you may even be able to use the standard 74.25MHz version of the processor.

    VESA specifies 5 formats with 1280x800 resolution with frame rates of 59.11Hz, 59.8 Hz, 74.934 Hz, 84.88 Hz and 119.909 Hz. These require pixel clocks of 71 MHz, 83.5 MHz, 106.5 MHz, 122.5MHz and 146.25MHz accordingly.

    The lowest pixel clock format uses the following timings...

     

     l/P    H active    V active    l/P    H total    H blank   V total    V blank    H Freq   V Freq    Pixel Freq HFP HSW HBP VFP VSW VBP
    Prog 1280 800 0 1440 160 823 23 49.306 59.910 71.000 48 32 80 3 6 14

    BR,

    Steve

  • 0 in reply to Steve Clynes
    TI__Genius 14405 points

    Hitesh,

    Please keep in mind the 108MHz is on the capture end only, and is only supported when display is not enabled at all.

    When display end is enabled only, or when both display and capture are enabled simulataneously, neither VPFE nor VPBE clock can exceed 75MHz.