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DS90UB935-Q1: Margin Analysis program requirement

Bala R
Prodigy 80 points
Part Number: DS90UB935-Q1
Other Parts Discussed in Thread: USB2ANY

Hello Expert,

Is it necessary or possible to perform Margin analysis in 935 serializer? What is the right approach if it is possible. Please guide here. 

  • 0
    TI__Mastermind 23885 points

    Hello Bala,

    The Margin Analysis tool is used to examine the link between the DS90UB935 and the deserializer. The MAP tool is specifically designed to work on the deserializer.

    To monitor link on the serializer, the GENERAL_STATUS register (0x52) can be read to see if there are any errors or link lost flags. 

    Best,

    Zoe

  • 0 in reply to Zoe Bison
    Prodigy 80 points

    Hello Zoe,

    Thank you for the response. 

    I understood your point on MAP tool.

    We have both Serializer (935) and Deserializer (936) in our board. Is there any common platform like EVK to test these ICs? As per your comments for serializer by checking register 0x52 will give more info related to link details right? Please advise. 

  • 0 in reply to Bala R
    TI__Mastermind 23885 points

    Hello Bala,

    Register 0x52 on the serializer will provide a flag if back channel link is lost, if there is forward channel lock, and report if there are CRC errors. Register 0x4D and 0x4E on the deserializer 936 will provide more specific details on lock status and errors. Registers 0x4D and 0x4E are monitored by the MAP tool. It is best to monitor link from the deserializer as link is determined by the serializer locking to the deserializer. 

    Regarding a platform to test the ICs, I recommend using the Analog Launchpad GUI. Analog Launchpad will provide register monitoring and script examples. Analog Launchpad can be used by connecting the I2C lines to the USB2ANY. Similarly, EVMs are designed to test the ICs individually. 

    Please let me know if you have any additional questions.

    Best,

    Zoe

  • 0 in reply to Zoe Bison
    Prodigy 80 points

    Hello Zoe,

    Thanks for the details. This is very helpful.