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Thread: Interfacing to CFAO4265A-TFK

  1. #1
    Join Date
    2012/04
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    2

    Interfacing to CFAO4265A-TFK

    The tech section says this has a SPI interface but I can find no details of high level commands for this screen. Do I need to use a backpack with this to connect with a micro processor?

  2. #2
    Join Date
    2003/11
    Location
    Western WA, USA
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    The tech section says this has a SPI interface
    Yes, it does. There is a data input, a clock input, C/D input, and chip select.
    ... but I can find no details of high level commands for this screen ...
    I'm not sure what you expect "high level commands" to be, but I think the native commands do not qualify. You have to do an init sequence, and set column and page addresses, and write 8 pixels at a time, etc.

    Do you think "SPI interface" implies high level commands?
    ... Do I need to use a backpack with this to connect with a micro processor?
    No, you can connect it directly to a processor, using the 5 control lines. However, if you want "high level commands", then you will need a separate processor (or library code to include in your app) to do the dirty work of executing those commands.
    Infinity or Bust

  3. #3
    Join Date
    2012/04
    Posts
    2
    Maybe "high level" was not the right term, how about "command set" or something.

    I can't find any info about the interface except that it's SPI.

    You have to do an init sequence, and set column and page addresses, and write 8 pixels at a time, etc.
    Yep. Where is this documented?

  4. #4
    Join Date
    2003/11
    Location
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    That info is in the data sheet, which you can find here: http://www.crystalfontz.com/products...2011-10-21.pdf

    The SPI description and timing diagrams are on page 24. The command set starts on page 42. You know that you need to have external capacitors for the charge pump circuit, detailed on pages 32~40.
    Infinity or Bust

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