NHD-2.4-240320CF-CSXN#-F works in 18 bits(262K colors) mode

charlie

• March 14, 2016 09:07

Hi, I have NHD-2.4-240320CF-CSXN#-F display. I want to use it in 18 bits(262K colors) interface. But when I send data to lcd. It accepts first 2 bytes to be a pixel, and next 1 byte to a pixel too. not next 2 bytes. how do I set it to 18 bits interface? Thanks.

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  Saurabh_B

  • March 14, 2016 10:07

  Hi Charlie,
  
  Unfortunately it is not possible to use 18-Bit parallel to write to the display.
  There are only 16 data pins connected to the controller, you would need to write Twice to the display for 18-bit color.

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  charlie

  • March 14, 2016 11:07

  Hi Saurabh,
  
  do you have initial sequence for 16 interface, but 18 bits data? My code looks working in 16 bits mode.
  
  Thanks a lot

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  Saurabh_B

  • March 15, 2016 11:07

  Charlie,
  
  Unfortunately we do not have any initialization examples to drive this display using 16bits.
  
  I would recommend using the Interface Pixel Format command to set the display into 262K color mode with 18b/pixel.
  You can find the datasheet for this controller through the following link: http://www.newhavendisplay.com/app_notes/ST7789S.pdf
  
  To do this you would need to send the following:
  Command: 0x3A
  Data: 0x66
  
  That will set the display into 262K RGB interface with 18 bits/pixel. This is explained more on page 217 of the controller datasheet.
  
  Then you will have to decide which format you would like to use to write the data:
  This will be selected by the RAM control command (0xB0h)
  
  the MTD1 and MTD0 bits control how the data should be input into the display. On pages 81-84 of the controller specification it will give you options on how you would be able to input the data.

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