SN75DP139: HDMIC CEC connection on SN75DP139RGZR

Muhammad Awais

Part Number: SN75DP139

Hi,

We are using SN75DP139RGZR to converted USB C (after cross mux) DP lines to HDMI conversion. It seems like there is no pin on SN75DP139RGZR to connect with the CEC of HDMI port. Please note that in our application we are not using any display port except the HDMI only. Can you please suggest where we should be connecting the CEC pin or we have tie it to GND or VDD?

Secondly, the sink side of the I2C connections will are connected to the HDMI but what about the source side I2C? Are they going to connect to the Aux connections of DP, if yes then any level translation or any intermediate circuitry is required?

Thanks,

Mat

over 3 years ago

0 David (ASIC) Liu over 3 years ago

TI__Guru*** 139515 points

Mat

The output of USB C (after cross MUX) is DP, but DP139 is a DP++ to HDMI level shifter + retimer. To go from DP to HDMI, you would need a DP to HDMI active protocol converter. The DP139 is not the right solution in this particular case.

Thanks

David

0 Muhammad Awais over 3 years ago in reply to David (ASIC) Liu

Intellectual 550 points

Hi David,

Thanks for clarifying on it. Can you please suggest anything else from TI?

Kind regards,

Muhammad Awais

0 David (ASIC) Liu over 3 years ago in reply to Muhammad Awais

TI__Guru*** 139515 points

Muhammad

Unfortunately we do not have a DP to HDMI active protocol converter solution. You can take a look at the MCDP2900, https://www.kinet-ic.com/uploads/MCDP2900-03a_Datasheet_Brief.pdf.

Thanks

David

0 Muhammad Awais over 3 years ago in reply to David (ASIC) Liu

Intellectual 550 points

Thanks David,

Somehow I also found the same part number and already added on the schematic. Thanks for the confirmation from your side. We are going to use it after TUSB564RNQT. Thanks for your help.

Kind regards,

Muhammad Awais

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SN75DP139: HDMIC CEC connection on SN75DP139RGZR