spectre nodes info: pin names different than what is in schematic or input.scs 


Hi *,

I'm trying to get the instances connectivity through hierarchy, the mapping hier.inst_name:pin -> hier.net_name

I'm using the "info what=nodes"

It works, but I have two problems with some device models (the real model names were hidden, so I've use "abc", "xyz", ...)

#1 issue -  for some devices instead of pin names in nodes.info, I get the the pin numbers.
It seems to happen for all capacitor and resistor types.

capacitor: C0 of zzz
           1 : net392
           2 : 0
Instead of "1", "2" preferable to have "p", "n".

#2 - Some devices  are netlisted in input scs as caps  C2 (net1 0 v_pwell) xyz value=11f wlratio=1 but on the nodes.info file I get a different type and a numbers of pins.

bsim4: C2 of abc
          d : 0
          g : net1
          s : 0
          b : 0
I've had a look in the model files and the reason is that xyz 3 pins capacitor model is derived from a MOS card model (bsim4), like below (xyz -> xyz_p -> abc card model) :
xyz (p n b) xyz_p  ...
* ... 
* ...
ends xyz

xyz_p (n p n n) abc ...
*...
*...
ends xyz_p



abc (d g s b) abc_modelcard l=l w=w ad=ad as=as pd=pd ps=ps nrd=nrd nrs=nrs trise=trise

ends abc

model abc_modelcard bsim4 ....


Below are the spectre simulator options.

simulatorOptions options psfversion="1.4.0" reltol=1e-2 vabstol=1e-4 \

    iabstol=1e-10 temp=27 tnom=27 scalem=1.0 scale=1.0 gmin=1e-12 rforce=1 \
    note=yes maxnotes=5 warn=yes maxwarns=5 digits=5 cols=80 pivrel=1e-3 \
    sensfile="../psf/sens.output" checklimitdest=file \
    inlinesubcktcurrent=subckt useterms=name 
tran tran stop=100n write="spectre.ic" writefinal="spectre.fc" \
    method=euler annotate=status maxiters=20 
subckts info what=subckts where=rawfile
designParamVals info what=parameters where=rawfile
asserts info what=assert where=rawfile
nodes_2 info what=nodes where=file
terminals info what=terminals where=file
saveOptions options save=all currents=all subcktprobelvl=3


Is there any option to get the pin names as they are in the .scs ?
for caps/res to get (p n)
for the other to get the pins from "top" model , e.g "(p n b) of xyz" insetad of "(d g s b) of abc" 

Preferable some other spectre param/option , and then to parse 1-2 files, if there is a need to parse multiple files/db I'm OK with that too.
I have no control on models definition.

Thank you,
Marcel