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assign model to idle die in a stack die(multiple die) package

Question asked by xli on Nov 5, 2016

Hi,

 

I have a question about how to assign model to these idle dies  inside stack-die DDR or NAND package.

 

In ebd model, one die is active as “ output” driver, how should we assign IBIS model to other idle dies?

 

There are  “ buffer settings” as input, output, stuck high, stuck low.  I don’t think either works close to real case for these idle dies. Should we have a 3-state selection in IBIS model?

 

Thanks

 

Xin

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