AnsweredAssumed Answered

Crosstalk level in Quick analysis is too high when compare with Detail analysis or manual Interactive mode

Question asked by hungreohd on Mar 6, 2018
Latest reply on Mar 7, 2018 by weston_beal

Dear Experts,

I analysis the crosstalk in Boarsim follow three ways below:

 

1/. Using Quick analysis in Generic Batch mode.

I have assigned our IBIS DDR4 controller and EBD model to DIMM connector.

I take one net with highest crosstalk level below:

 

  NET = DDR2_D26

   ELECTRICALLY ASSOCIATED NETS --------------------------------------

     net = DDR2_D26

     net = DDR2_D26

     net = DDR2_D26_1

     net = DDR2_D26_1

   AGGRESSOR NETS (Estimated peak crosstalk)

     DDR2_CKE1 ......................  12 mv

     DDR2_D27 .......................  98 mv

     DDR2_D30 .......................  23 mv

     DDR2_D31 .......................  81 mv

     Sum of the two strongest aggressors ............. 179 mv

     ** Warning ** Estimate exceeds maximum allowed crosstalk!

 

2/. Detailed analysis in Generic Batch mode

- To run this mode, I have also assigned our IBIS DDR4 controller and EBD model to DIMM connector. Only DDR2_D26 net is run.

- The result is below:

image (1).png

3/. Interactive method

In this mode, the all configuration are the same in Detail analysis of Generic Batch mode. It's helpful for result comparison.

image (3).png

image (4).png

Conclusion:

- The crosstalk level is similar with the result in the Detailed analysis mode.

- The crosstalk level in Quick analysis mode is too high. Could anyone help to understand the difference between three crosstalk analysis mode ?

 

Thank you so much.

 

Outcomes