DP159 - SCL/SDA pins when GPU or Sink does not support clock streching

Kawai

Guru 19785 points

Hi Team,

In the new revision datasheet (SLLSEJ2C), there is following highlighted note in Figure 31.

[Question]
Would the recommended connection be the below, when clock stretching is not supported ?

Best Regards,

Kawai

0 Moises Garcia over 8 years ago

Hi Kawai-san,

You are right, that's how you connect DDC in snoop mode.

Something important to note is I2C high level voltage is 5V, if GPU doesn't support 5V you have to place an I2C level shifter.

Besides, take into account SDA/SCL_SNK still need 2k pullups.

Regards

0 Kawai over 8 years ago in reply to Moises Garcia

Guru 19785 points

Hello Moises-san,

Thank you for your comment. I am clear.

Best Regards,
Kawai

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