icfb won't netlist default component parameters

Hi all,

Does anybody know why this happens?

For example, the default value for caps in analogLib shows 1p, but
in the spectre netlist generated, the cap line doesn't have the
value. It's just "c1 n1 n2 cap". I need to explicitly enter a value
to have that show up in the netlist. Anyway to make the default
parameters show up in the netlist also?

Thanks.

J

 

[Andrew Beckett]

jlam1976@gmail.com wrote, on 02/23/09 17:34:

Hi all,

Does anybody know why this happens?

For example, the default value for caps in analogLib shows 1p, but
in the spectre netlist generated, the cap line doesn't have the
value. It's just "c1 n1 n2 cap". I need to explicitly enter a value
to have that show up in the netlist. Anyway to make the default
parameters show up in the netlist also?

Thanks.

J

Usually this is because you didn't do:

setenv CDS_Netlisting_Mode Analog

before starting DFII. If you run "icms" it sets this automatically, but if
running icfb it doesn't. This is because the spectre netlister can be used for
both "Digital" (i.e. NLP-based netlisting) or "Analog" (i.e. CDF-based netlisting).

Regards,

Andrew.

 

[J]

Thank you so much! It worked! BTW, what's the difference between
icms and icfb? I was told to run icfb. Anyways, maybe I can look
that up, but thank you very much for your help!!

On Feb 24, 6:10 am, Andrew Beckett <andr...@DcEaLdEeTnEcTe.HcIoSm>
wrote:

jlam1...@gmail.com wrote, on 02/23/09 17:34:

Hi all,

  Does anybody know why this happens?

  For example, the default value for caps in analogLib shows 1p, but
in the spectre netlist generated, the cap line doesn't have the
value.  It's just "c1 n1 n2 cap".  I need to explicitly enter a value
to have that show up in the netlist.  Anyway to make the default
parameters show up in the netlist also?

  Thanks.

J

Usually this is because you didn't do:

setenv CDS_Netlisting_Mode Analog

before starting DFII. If you run "icms" it sets this automatically, but if
running icfb it doesn't. This is because the spectre netlister can be used for
both "Digital" (i.e. NLP-based netlisting) or "Analog" (i.e. CDF-based netlisting).

Regards,

Andrew.

 

[Andrew Beckett]

J wrote, on 02/24/09 17:50:

Thank you so much! It worked! BTW, what's the difference between
icms and icfb? I was told to run icfb. Anyways, maybe I can look
that up, but thank you very much for your help!!

icms is a smaller executable that doesn't contain layout capabilities - so it's
fine if you're doing schematic entry and simulation. It stands for "IC Mixed
Signal" as opposed to "IC Front to Back".

In IC61 we're cutting down the executables, to mainly be "virtuoso" (that's the
eventual goal anyway) - the miriad of different executable names was confusing,
created more testing, and most users used "icfb" anyway...

Andrew.