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How to convert TFP403PZP's Output (8bit -> 6bit)

Lee Dong gyo
Prodigy 10 points
Other Parts Discussed in Thread: TFP403

Hi, for a project of mine I am trying to build a HDMI to LVDS solution in order to control a screen with the following characteristics:
- 800x600 resolution

- 6-bit per color


I bought a TFP403PZP as suggested, however, I am now reading through the datasheets and, even if the LVDS transimitter has an option for 6-bit per color data(Thine's thc63lvd823b), the TFP403 does not seem to support it. Is that so? Is there any workaround to make it work?
Thanks!

p.s. output(LSB) floating or Ground  doesn't work... 

E-mail : samebridge@lgdisplay.com

       

  • 0
    TI__Mastermind 20985 points

    Hi Lee,

    The TFP403 will deserialize 10-bit TMDS words to the CMOS bus, according to the standardized 10b:8b decoding scheme.  It sounds like you want to use 18-bit RGB data; however, the HDMI standard requires at least 24-bits for RGB.  Does your HDMI stream have 24-bits of valid color?

    As for the LVDS transmitter, you don't need to pick one that has a "6-bit option".  You can use a 28-bit serializer and just not use all of the available bits, and use 3 of the 4 LVDS lanes.

    Thanks,
    RE