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ADV7441A can't write EDID

Question asked by msauer on Jul 1, 2014
Latest reply on Jan 19, 2015 by mattp

Hello,

 

we use an ADV7441A as frontend in our scaler board. On some of the ADV7441A I can't write the EDID Data. First I disable the EDID in register 0x73 KSV Map. Than I write the EDID Data to EDID Map . But If I read back the data I will get only 0x01 the same happens if I will read data from KSV Map.

The PC also can't read the EDID Data. The ADV7441 don't acknowledge the devoce address.

Do you have any idea where the problem is?

 

Thank you for your help

 

best regards

 

martin sauer

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