AnsweredAssumed Answered

DDR3 wizard- missing receiver voltage threshold

Question asked by Katkoria.Deepak on Jan 10, 2011
Latest reply on Jan 10, 2011 by weston_beal

Hello Expert,

For DDR3 wizard simulation, I am considering ac/dc threshold for measurment.

 

1). For receiving model,

I am getting following message "

         IBIS Model: S15RXRT120

         Model does not have a [Receiver Thresholds] section.

         Missing Vinh and Vinl thresholds in the [Model Spec] section.

         Only Vinh and Vinl thresholds are specified in the [Model] section, and will be used for both AC and DC thresholds.

         Net: /DDR-DQ13

           "

receiving controller model(IBIS file)

"[Model]       S15RXRT120
Model_type       Input
Polarity         Non-Inverting
Vinh  =   1.0V
Vinl  =   0.5V"

 

DO you want me to add the AC/DC threshold from Jedec standard into IBIS file?

How can I remove this error ?

 

2). second error I am getting is for data signal :

"These nets have inappropriate IBIS model types attached, for the selected simulations:

   Net: /DDR-AA8  (Address/Command Net)

      Controller pin: 7S00.AD28  (DDR_DA_8)  --Model is input only, but needs to be output or I/O

Model: S15RXRT120

"

In wizard, I have setup controller data line like:

S15RXRT120   

i/p, DDR3, 1.5V RX, 120 Ohm ODT

DQ, DM

Read

S15TX    

o/p, DDR3, 1.5V TX, single

DQ, DM

Write

 

Could you please suggest the solution for above problem ..

 

Thanks,

Deepak

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