IBIS model issues with 1040/1042

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IBIS model issues with 1040/1042

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frankyp32
Contributor I

Could you please guide us to the IBIS model (file) for the T1042. We currently have the model named “T1040” which may be common between T1040 and T1042 devices, but we found a problem with the models inaction with HyperLynx. Basically two issues:

  • When selecting ODT models, they all change simultaneously, i.e. if we changes the ODT model for DQ or DQS it changes them for DM too.
  • Plus we get an error stating that we do not have thresholds set when DQ is an input. Shouldn’t that be part of the IBIS model?
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frankyp32
Contributor I

Bulat,

does this confirm that the IBIS for the T1040 is the same as the T1042?

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bulat
NXP TechSupport
NXP TechSupport

Yes, it does. As well as T1020, T1022.

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bulat
NXP TechSupport
NXP TechSupport

1. I am not sure if this is an issue, the same ODT setup really applies to all DQ/DQS/DM signals within the SDRAM chip.

2. As I can see all DDR3L receiver models have Vinl and Vih definitions, so it is not clear what else the tool needs.

Regards,

Bulat

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