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OMAPL138 interfacing to Sharp LCD - LQ038Q7DB03R

Calum Mackinnon
Genius 4155 points
Other Parts Discussed in Thread: OMAPL138, OMAP-L137

Hi,

I have a customer who is currently using the Sharp LQ038Q7DB03R  LCD. We are trying to figure out how to Physically hook the LCD to the OMAPL138. The OMAP has a 16 bit bus however the LCD has 6 bit Red, 6 bit Green and 6 bit blue. According to the LCD user guide http://focus.ti.com/lit/ug/sprufm0b/sprufm0b.pdf page 19 there are only 5 bits for Red and Blue and 6 bits for Green.

I guess the question is - how would we hook the two together and would we loose any functionality by not have 6 bit color?

Cheers

Calum

  • 0
    Intellectual 590 points

    Hi Calum,

      The thing is you have an LCD controller that has less resolution than the LCD screen you want to drive, in that case

    the max resolution you will achieve is the lesser of the two in this case RGR 16Bit, you can check out this schematic on page 9

    http://support.spectrumdigital.com/boards/dskda830/revf/files/DSKDA830_ui_schematic_RevC.pdf

    of the DA830 GUI board from Spectrum Digital where they show you how to hook up an Sharp LCD to a OMAP-L137 the connections

    you would have to make are similar. On the right hand side of the page you will see a text stating the mapping of the RGB signals.

    and on the schematic you will notese how they repeat the same signal of the controller for two inputs of the LCD:

    -LCD_D15 goes to: LCD_R0 and LCD_R5

    -LCD_D4 goes to: LCD_B0 and LCD_B5