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TCA9517 - About unused pin and usage

Guru 21045 points
Other Parts Discussed in Thread: TCA9517

Our customer would like to get the SCL pin of TCA9517 through the DDC(Display Data Channel) signal of HDMI.

 

 

We would like to ask you about contents as follows.

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[Q1]

If they don’t use the SDAA and SDAB pin, may this unused pin make the no connect(NC)?

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[Q2]

Do you recommend this usage?

Could you please let us know if you have any concern?

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[Q3]

According to our customer, the DDC signal is not passed when the pull up resistor is 47kohm.

However, this signal is passed if the pull up resistor is 10khom.

I’m understanding that this resistor value have to adjust by users.

However, Could you please let us send if you have the calculating formula to decide this resistor value?

 

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Regards,

Kanemaru