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SN65DSI83-Q1: CHA_24BPP_FORMAT1(0x18[1]) description is correct?

Part Number: SN65DSI83-Q1

Hello,

My customer is wondering if the description of CHA_24BPP_FORMAT1(0x18[1]) is correct because if they changed the setting to opposite one, it worked as shown in the description.  I mean 0x18[1]=0 says format2 providing the MSB data from Y3P/N, but it showed as if it worked as format1 providing LSB data from Y3P/N.  Would you please tell me if the datasheet description is correct or not?  I can't find the same question in E2E, so my customer may be wrong.

Best Regards,

Y.Kawasaki

  • Hi Yoshikazu-san,

    I believe your customer is wrong. As you said, if this description was wrong we would have quite a few of this same question being asked since it's important for the format to be correct for correct operation of the device. This question has not been asked at all though.

    Regards,
    I.K.
  • In reply to I.K. Anyiam:

    Hello I.K.
    Thank you very much for your quick reply. Would you please check it on actual silicon since I don't have one here? My customer says they had the same issue on their previous product. They configured the register that it had showed opposite description in the datasheet. If they did as shown in the datasheet, the display showed inverted images, so they think the description should be wrong.
    Best Regards,
    Y.Kawasaki
  • In reply to Yoshikazu Kawasaki:

    Hi Yoshsikazu,

    Can you share the panel datasheet? Perhaps it also has an option of selecting between the different formats and it's not matching with what he selects for the DSI83.

    Regards,
    I.K.
  • In reply to I.K. Anyiam:

    Hello I.K.,

    Thank you very much for your quick reply again.  What do you mean by panel datasheet?  Would you like to see the actual register here?  If so, this is the one if I correctly pasted it.

    I suppose you might want to say if my customer configures CHA_24BPP_MODE=1 or 0(default).  I'll check it, but even if my customer did wrong setting(CHA_24BPP_MODE=0), they wouldn't see inverted images when CHA_24BPP_FORMAT1=0.

    Best Regards,

    Y.Kawasaki

  • In reply to Yoshikazu Kawasaki:

    Hello I.K.

    I wasn't able to paste the image in my previous post.  I tried it again here.  I hope it works now.

    temp.pptx

    Best Regards,

    Y.Kawasaki

  • In reply to Yoshikazu Kawasaki:

    Hello I.K.

    I confirmed about the setting to my customer and found CHA_24BPP_MODE=1 which means 24 bit mode.

    Best Regards,

    Y.Kawasaki

  • In reply to Yoshikazu Kawasaki:

    Hi Yoshikazu,

    No, I mean the datasheet for the display they are using. The display is also expecting a certain mapping format, and some displays have an option of switching from one format to the other. So perhaps he has the display not configured for the correct format.

    I'm pretty confident our datasheet's not incorrect on this point. If it was then everybody that used this part would see this same issue.

    Regards,
    I.K.
  • In reply to I.K. Anyiam:

    Hello I.K.

    Thank you for your comments.  My customer will check their system if your comments are correct or not.  I'll post another one if needed, so please let me close this one.

    Best Regards,

    Y.Kawasaki

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