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AM389x interface to LVDS displays

Timothy Starr
Expert 2445 points
Other Parts Discussed in Thread: SN65LVDS93A

Our tablet design requires an LVDS video output to drive the LCD but the AM389x does not support this directly.  Using HDMI is out because the XGA resolution isn’t supported and it would take too much hardware anyway to convert this to LVDS.  The processor’s digital video output signals (Video Output 0 and Video Output 1) may be the easiest way to convert to LVDS but I can’t find an 8168 EVM hardware user guide that shows where this is supported.  From the schematics I’m guessing that J17 breaks these signals out.  Also, what would you suggest for conversion to LVDS?  Would something like the TI SN65LVDS93A Flatlink Transmitter work?"

Tim Starr on behalf of JC.G

  • 0
    TI__Mastermind 20985 points

    Hi Timothy, I'll address the LVDS device selection part of your question.  Assuming you have 24-bit color, your LVDS transmitters to choose from are:

    LVDS83 (31-68MHz, 0C to 70C)
    LVDS93 (20-68MHz, -40C to 85C)
    LVDS83A (10-100MHz, -10C to 70C)
    LVDS83B (10-135MHz, -10C to 70C)
    LVDS93A (10-135MHz, -40C to 85C)

    All support 3.3V parallel signals, and the 83B and 93A can also do 1.8V parallel.

    Thanks,
    RE

  • 0 in reply to RE
    TI__Mastermind 20245 points

    Hi,

    AM389x can support the digital video out that is 24bit RGB with each R, G and B having 8 bit resolutions. This can be fed to LVDS transmitter. Digital encoder of the 8168 can support all the custom/Vesa resolutions upto 165MHz clock. So XGA (1024X768) can be supported.

    Regards,

    Hardik Shah