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

marcelpreda

Hi *,

I'm trying to get the instances connectivity through hierarchy, the mapping hier.inst_name:pin to hier.net_name
I'm using the spectre  "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 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 ....


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

Sorry for bad formatting, but when try to use "code" tags, the post was not submitted .

Parents
  • marcelpreda

    Added the specre options

    saveOptions options save=all currents=all subcktprobelvl=3simulatorOptions 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

    Maybe I've miss some useful option.

    Thank you,
    Marcel

  • Andrew Beckett
    in reply to marcelpreda

    Hi Marcel,

    I've checked, and I don't think there's any way to dump the nodes for subckt instances; it only outputs the leaf device information.

    Andrew

Reply
  • Andrew Beckett
    in reply to marcelpreda

    Hi Marcel,

    I've checked, and I don't think there's any way to dump the nodes for subckt instances; it only outputs the leaf device information.

    Andrew

Children
  • marcelpreda
    in reply to Andrew Beckett

    Hi Andrew,

    Thanks a lot.


    Best Regards,

    Marcel

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