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TMDS181: Handling Unused HPD_SNK Pin

Sadanori Kato
Guru 36540 points

Part Number: TMDS181

Hi,

Could you please tell me the handling which you recommend for the unused HPD_SNK pin ?
Is my understanding as the below ?]

Best regards,
Kato

  • 0
    TI__Mastermind 23815 points

    Hi Kato-san,

    If HPD_SNK is unused, HPD_SRC can be left floated, the pull-down can be placed as a placeholder.

    Regarding HPD_SNK there are two ways to handle it:

    Place the pull-up on HPD_SNK to have the TMDS181 enabled all the time

    Don't place the pull-up but disable automatic power down based on HPD_SNK(register 0x09[2]), again you can leave the pull-up as place-holder

    Regards

  • 0 in reply to Moises Garcia
    Guru 36540 points

    Hi Moises-san,

    Thank you for your information.

    I will suggest our customer to place the pull-up on HPD_SINK such as it can be used in both hardware mode and software mode.

    Best regards,
    Kato