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AM335x: Can device support dual displays

TommyG
Genius 13045 points

I want to determine if there is any way to interface 2 LVDS displays to the AM335x devices?  Can someone explain how if it is possible?

Thanks.

  • 0
    TI__Guru 64460 points

    The AM335x only has a single LCD controller interface.

    The only way I see of hooking up to just a single LVDS display is with an external LVDS serializer device which TI has a few to select from.

    Then, for 2 LVDS displays, run the same LCDC interface signals to another external LVDS serializer device, BUT both displays would need to support the same resolution, same refresh rate, same blanking intervals, etc.

    And thirdly, before you ask, no, I don't have an example.  These are my initial thoughts.

  • 0 in reply to BrandonAzbell
    Prodigy 130 points

    What is ur target display size ?  If one of them is quite small LCD, you can hook up over SPI.

    Viral

  • 0
    TI__Mastermind 28025 points

    The AM335x  has built-in support for 2 displays but only if they are connected in LIDD (remote frame buffer) mode. In raster mode only one display is supported.

    You could get creative and add external logic to split one interface into 2. The frame buffer would be set large enough to feed both displays giving independent images on each. The displays would run a half the frame rate of the controller. the external logic would need to have enough local memory to contain at least one frame for each of the target displays as well as generate the appropriate signals to retransmit the data.

    Not my idea but it sounds like it would work. However, the cost of the external logic may be prohibitive.

      Paul