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DS90UB948-Q1: How to see the value of SP(Strobe Positions)?

Part Number: DS90UB948-Q1

Dear team,

In the AEQ mode, how to see the value of SP?

In the manual EQ mode, how to set the value of SP?

Thanks & Best Regards,

Sherry

  • Sherry,

    it is not recommended to change the SP for UB948, pls use the default SP in your case. do you have some other problems here to ask how to set SP?

    regards,

    Steven

  • Hi Steven,

    When I use the MAP tool, I get a result as below. The picture tells me that the recommend value of SP is 7 to 10. Once I enable the AEQ, I can check the EQ_status and know the value of EQ, so I can check whether this value is in the green range. But I don't know the value of SP. You said the SP is fixed in AEQ mode or manual EQ mode.

    1. Could you please tell me what is the fixed value of SP? I can't find any register which is related to the SP configuration.

    2. In addition, could you please tell me why SP is recommended to a default value?

    Thanks & Best Regards,

    Sherry

  • Sherry,

    For UB948's MAP, it only has 10steps for margin analysis. it is not the picture that  you pasted here, for your issue, pls check below:

    1. SP is recommended as default (SP=2), so you can't see any registers on sfilter in d/s.

    2. UB948 is one old part and it is verified by TI's lab and our WW customers as well with the default SP setting, so it is NOT recommended to change it also our d/s doesn't list it as well.

    best regards,

    Steven

  • Hi Steven,

    Ok, thank you !

    Best Regards,

    Sherry