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DM368 maximum video out clock frequency

Nara Won
Intellectual 1605 points

After discussing with experts, following conclusion was gotten.

The maximum video output clock frequency DM368 can handle is 75MHz. DM368 can get external video clock but it cannot handle faster than 75MHz. With 75MHz 1080p 30fps is possible. But LCD pannel requires 1080p 60fps. To get 1080p 60fps, external FPGA or scalar chip needs to be used. 720p, 1080i 60fps is no problem to support.

If something wrong in this conclusion, please, let me know.

  • 0
    TI__Genius 14405 points

    Thanks Nara.

    Minor clarification. In general LCD panel generally supports a range of 55-65, or even 50-70, fps. 720P & 1080I60, 1080P30 are 74.25MHz, and 1080P60 is 148.5MHz.

    To get 1080P60fps, we can either rescale the picture inside the FPGA (no frame buffer required, but effective resolution is effected), or repeat every frame in the FPGA (which will require a memory buffer inside the FPGA, but we get full resolution on the display).