The Designer's Guide Community Forum

The Designer's Guide Community Forum
https://designers-guide.org/forum/YaBB.pl
Simulators >> AMS Simulators >> How to model strength using WREAL �?
https://designers-guide.org/forum/YaBB.pl?num=1519966583

Message started by Ravi Shekhda on Mar 1^st, 2018, 8:56pm

Title: How to model strength using WREAL �?
Post by Ravi Shekhda on Mar 1^st, 2018, 8:56pm

Hi,

� � I have tried strength modelling (strong1/strong0/weak1/weak0...) in Verilog-D.
� �
� � �But, Can you suggest me, How to model strength using wreal in Verilog-AMS ?

� � �I have tried below model....
////////////////////////////////////////////////////////////////////////////////
�assign (strong1 , strong0) #2 pad_int � � = � ( pu_strng === 1'b0 && pd_strng === 1'b0 ) ? `VDDA :
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � ( pu_strng === 1'b1 && pd_strng === 1'b1 ) ? `VSSA :
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � ( pu_strng === 1'b0 && pd_strng === 1'b1 ) ? (`VDDA/2) : `wrealZState ;
� � � � �

assign (weak1 , weak0) #5 pad_int = �( pu_weak === 1'b0 && pd_weak === 1'b0 ) ? `VDDA :
� � � � � � � � � � � � � � � � � � � � � � � � � � � � �( pu_weak === 1'b1 && pd_weak === 1'b1 ) ? `VSSA :
� � � � � � � � � � � � � � � � � � � � � � � � � � � � �( pu_weak === 1'b0 && pd_weak === 1'b1 ) ? (`VDDA/2) : `wrealZState ;

///////////////////////////////////////////////////////////////////////////////

While simulation of above design, I am not getting any syntax error. But, not getting expected �output.

i.e. �
� �In case of pu_strng = 0 and pd_weak=1 ====> Output getting X
� �In case of pd_strng = 1 and pu_weak=0 ====> Output getting X

Thanks
-Ravi Shekhda