Connecting 18bit controler to 24bit display

marsaf

• February 18, 2016 09:07

Please advice, how to correctly connect 18bit RGB microcontroler to 24bit display i.e. NHD-7.0-800480EF-ATXV#-CTP. Should be R0, resp. G0, resp. B0 from microcontroler connected to R0, resp. G0, resp. B0 on display or to R2, resp. G2, resp. B2? Will the lack of bpp affect only color range or even contrast (or brightness) of the display? Thank you very much!

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  Michael_L

  • February 18, 2016 10:07

  Morning Marsaf,
  
  Great question, you will notice that the LSBs (least significant bits) are tied to ground.
  
  To answer your second question, the lack of bpp will only affect the color depth.
  
  Hope this helps!

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  marsaf

  • February 22, 2016 10:07

  I've connected it in a wrong way (R0,G0,B0 from controller to R0,G0,B0 on display, etc.), because correct way (R0,G0,B0 from controller to R2,G2,B2 on display, etc.). And that was the reason, why the display was kind of dull, and it didn't get the maximum backlighting.
  
  thank you very much

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  Michael_L

  • February 22, 2016 11:07

  Not a problem Marsaf, happy to help!

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  Guest

  • February 23, 2016 11:07

  Is the connection schematic that you attached suitable for NHD-3.5 320240MF ATX tft module ? I will connect the R0,R1,G0,G1,B0,B1 to the GND and R2-R7 to MCU R2-R7 (  B2-B7 to MCU B2-B7 and G2-G7 to MCU G2-G7). Please confirm my connections.

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  Michael_L

  • February 23, 2016 13:07

  Morning,
  
  Correct, the LSBs (least significant bits) of each color data line will need to be tied to ground when 18-bit RGB interfacing is being used.

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