PCell layers

[jbxvt]

hi
i am sure someone must have asked this question before but I couldn't
find exactly what I was looking for. somebody told me there is a
command that will tell you want layers are being used in a PCell. the
guy didn't remember what it was! does anyone know?

jb

 

jbxvt wrote:

hi
i am sure someone must have asked this question before but I couldn't
find exactly what I was looking for. somebody told me there is a
command that will tell you want layers are being used in a PCell. the
guy didn't remember what it was! does anyone know?

jb

You can open the pcell and then use the pull-down Design >>> Summary.

This will list everthing that is currently in the cellview. The pcell
could have options that turn layers on and off though so it might not
be completely correct.

Tim

 

[Andrew Beckett]

On 27 Feb 2006 20:05:34 -0800, "jbxvt" <jbabuus@yahoo.com> wrote:

hi
i am sure someone must have asked this question before but I couldn't
find exactly what I was looking for. somebody told me there is a
command that will tell you want layers are being used in a PCell. the
guy didn't remember what it was! does anyone know?

jb

If you're starting from an instance, you should be able to do:

instId~>master~>lpps

to get the layer purpose pairs used within the cellView. Note that
this will be the lpps used in that variant - which is probably what you wanted?

Andrew.

 

[Jimka]

question: can an lpp have zero shapes?

instId~>master~>lpps is a list
of layer purpose pairs, but are they guarenteed to
all contain a shape?

I usually do something like the following, but
i'm not sure if it is really necessary.

(setof lpp instId~>master~>lpps
lpp~>shapes)

It is a more expensive operation. but seems
more likely to give the correct answer.

 

[Andrew Beckett]

On 5 Mar 2006 10:18:08 -0800, "Jimka" <jimka@rdrop.com> wrote:

question: can an lpp have zero shapes?

instId~>master~>lpps is a list
of layer purpose pairs, but are they guarenteed to
all contain a shape?

I usually do something like the following, but
i'm not sure if it is really necessary.

(setof lpp instId~>master~>lpps
lpp~>shapes)

It is a more expensive operation. but seems
more likely to give the correct answer.

Yes, an lpp can have zero shapes. That happens if the cellView instantiates
another cellView - and the child contains lpps not in the parent.

Andrew.