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DS90UB954-Q1: Serializer DS90UB953 is not detecting at De-serializer DS90UB954 all the time.

Karthikeya RAM
Prodigy 70 points
Part Number: DS90UB954-Q1

Tool/software:

I have designer deserializer using DS90UB954-Q1 and Serializer using DS90UB953

But my  Serializer is not get detected all the time at serializer some time it detects some time it won't detect 

If my serializer is not detecting then I try to unmount and mount the drivers of serilaizer then in this condition serializer get detected

And in some of the case I need to unmount and mount my drivers of serializer multiples times for detection.

My serializer address is 18.

I have attached schematics of De-serializer.

It would be a great help if some one cam give me the solution for my problem.

Thanks in advance....!

NIKHIL



Deserilizer.pdf

  • 0
    TI__Guru* 91340 points

    Hello Karthikeya,

    Karthikeya RAM said:
    If my serializer is not detecting then I try to unmount and mount the drivers of serilaizer then in this condition serializer get detected

    And in some of the case I need to unmount and mount my drivers of serializer multiples times for detection.

    Can you clarify what do you mean by this? What does it mean mount and unmount driver? where do you "mount" it?

    Is the SER also your design? can you provide schematic?

    Do you see LOCK indication on the DES reg 0x4D?

    Have you tried different cable?

    Did you check your power supply is stable?

  • 0 in reply to Hamzeh Jaradat
    Prodigy 70 points

    Thanks for reply Mr.Hamzeh Jaradat,

    Can you clarify what do you mean by this? What does it mean mount and unmount driver? where do you "mount" it?
    -> I mean manually we load and unload the drivers of serailizer and Camera.

    Is the SER also your design? can you provide schematic?
    -> It's not my Seralizer design its from PHYTEC Germany.
    Schematics are not provided but its working with PHYTEC Germany De-seralizer.
    I would like to get clarify whether my De-serializer design is fine.

    Do you see LOCK indication on the DES reg 0x4D?

    Have you tried different cable?
    -> Yes tried with different cable and different boards too I have 5 board all are having same issue.

    Did you check your power supply is stable?
    -> Yes my power supply is stable I have verified it.

    Actaully my design have multiple sections like sensors,LTE,GPS and etc...
    Out of it De-serailizer is connected with seralizier through a FPD LINK (coaxial cable),only it have issue.

    Out of 10 iterations I can get 6 to 7 iterations serializer is getting detated and remaining 3 to 4 times my serailizer won't get detect .
    i need to unload drivers of serailizer and camera multiple times then i can see my serailizer I2C address at the log window.

    Regards
    Karthikeya Ram.

  • 0 in reply to Karthikeya RAM
    TI__Guru* 91340 points

    Hello Karthikeya,

    please make sure the used mode used on the DES matches the mode used on the SER.

    Also, make sure the Camera voltage is not dropping much due to the large count of used FB on the PoC.

    Also, make sure to measure the noise on VDD pins of the DES. These should not exceed 35mVpp