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Is there any way for AM3517/OMAP3530 to support high resolution LCD(such as: 1920*1280)?

Jianjun Liu
Intellectual 945 points
Other Parts Discussed in Thread: AM3517, OMAP3530

Hi,

  Is there any way for AM3517/OMAP3530 to support high resolution LCD(such as: 1920*1280) with 40fps at least? For AM3517 LCD interface, it couldn't. Is there any external LCD interface chip, which could be used for this purpose?

  Thanks a lot!

 

Br, Jianjun

  • 0
    TI__Mastermind 43875 points

    Jianjun,

    The AM3517 can support up to 2048x2048, as can all the OMAP3 derivative devices. The key is the maximum pixel rate.

    On the AM3517 the 'regular' LCD port is limited to 65MHz, but 75MHz is possible using a different pin muxing output set for some of the LCD data lines.

    75MHz is the specified maximum pixel rate, but I have been able to run the interface at 85MHz+, but as I say, this is actually out of spec.

    A quick rule of thumb for calculating the max frame rate is PClk / (H * W * 1.2) where...

    PClk = pixel clock (use 75MHz for max)
    H = display height
    W = display width
    1.2 = fudge factor to accommodate blanking times. Note, this can be as low as 1.0 or as high as 1.5 depending on whether you are trying to support a captive LCD or generate some of the VESA compliant modes.

    BR,

    Steve