Linux/TPD12S016: HDMI ESD CHIP-DDC EDID read Error

Jaffir,

What else do you have connected to the I2C line? Could you send a schematic and a two waveforms of the signal, one with the ESD device connected and one without it.

Regards,
Cameron

Hi Cameron,

Please see my answers in line.

What else do you have connected to the I2C line?
Ans: We have connected only the HDMI Transmitter to the I2C lines. No other devices are connected to I2C lines

Could you send a schematic
Ans: I have shared the Schematics of HDMI Transmitter"SiI9022ACNU" and ESD Chip "TPD12S016PWR" section.

And a two waveforms of the signal, one with the ESD device connected and one without it.
Ans: Yes I have shared the two waveforms of the signal's.
one is with ESD(DDC EDID read Error) and another one is without ESD(EDID Read passes).

Regards,

Jaffir

Hi Cameron,

Any update on the above issue.

Regards,

Jaffir

Sorry for the delay.

What might be going on is the common mode choke you have between the controller and the TPD12S016 is lowering the bandwidth of the TPD12S016. Try it without the CMC's and see if it still has the error.

Regards,
Cameron

Hi Cameron,

Common mode chokes are used only on HDMI lines not on the I2C lines.
We are facing the issue on I2C DDC EDID read Error.

Thanks
Jaffir

Hi Cameron,

Any update on the above issue.

Thanks

Jaffir

Jaffir,

I'm sorry I have been stretched thin.
I cannot replicate your exact issue but I believe the IO capacitance for this device is 15pF which might be too high for your system.
3 TPD4E05U06's could protect all of those lines and has a capacitance of 0.5pF.

If you need the level shifter TI has many of those.
Let me know of anything else.

Regards,
Cameron