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MAX96717 / MAX96716A Reverse eye map differs with camera vs serializer dev kit, GUI resets diagnostic config

Category: Software

Hi,

I’m validating a GMSL2 link using MAX96717 (serializer) and MAX96716A (deserializer) with the ADI GMSL SerDes GUI. I have observed a repeatable difference in the Reverse Channel Eye Map depending on what is connected on the serializer side:

  • With a camera connected, the reverse eye map shows a clear eye (screenshot below).

  • With the MAX96717 serializer dev kit (MAX96717-AAK-EVK#), the reverse eye map collapses unless I manually enable a diagnostic/continuous mode via register writes (screenshot below).

Additionally, opening the Signal Integrity Report / Eye Mapper tool resets these diagnostic settings back to defaults, requiring the registers to be rewritten after the tool is opened.

Questions:

  • Is it expected that reverse eye mapping depends on endpoint type/initialization sequence
  • Why does opening the SI Report/Eye Mapper reset diagnostic configuration and is there a supported way to keep diagnostic mode enabled?
  • What is the recommended workflow to obtain a valid reverse eye map when using dev kits only?

I understand there is a GMSL SerDes GUI manual, could you please point me to the correct document or section that describes the SI tools and eye mapping behavior?

Thanks, 

Erika

  • Hello,

    I have the same problem with a MAX96717 in our camera product together with the MAX96792 DPHY Evaluation Kit. Reverse eye looks like your 2nd picture, though communication works fine.

    Could you elaborate which register settings you changed to get this to show the correct eye?

    Thanks, 

    Enno