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  • Resolved

SN75DP130: Can use I2C to switch DP and HDMI mode?

Part Number: SN75DP130

Hi Team,

We do not connect CAD_SNK pin with DP connector, so if we plug in DP to HDMI dongle, it won't light up HDMI panel.

Can we use I2C to switch DP and HDMI mode?

Thanks

  • Hello Daniel,

    Unfortunately, this is not possible. This terminal is necessary to change between DP and TMDS mode in DP++ application.

    Regards
    Francisco
  • In reply to Francisco Javier Zamudio:

    Dear Francisco,

    Thanks for your comment.
    We found a strange symptom. If we insert the DP cable first, then unplug DP and change to HDMI dongle, it can display HDMI panel successfully.
    Is it possible if CAD_SNK pin is floating? Why the first DP cable insert would affect the final mode setting?

    Thanks
  • In reply to daniel:

    Hello Daniel

    We recommend to use an external 1M pull down resistor, this pin is not failsafe. The DP cable is inserted in the input or the output? What kind of source do you have? Could you share more details about your application?

    Regards
    Francisco

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