Stats

Locked Locked
Replies 7
Subscribers 142
Views 2248
Members are here 0

This discussion has been locked.

You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Layer for cell name of symbol

As I am creating a symbol for my PCell, I am not sure which layer should be used to display the cell name. Additionally, there is a "choice" section, but despite reading the documentation, I couldn't fully understand its purpose. What layer should be used, and what is the significance of the "choice" section? In my sample PDK symbols, the "choice" section displays "unknown." What does this mean?

RobMan 6 months ago

Hi,

Is this not the same question you asked last week?

lpp ("device" "annotate")

Re. "choice". Are you referring to 'schSymbolLabelChoices'?
Cancel
Vote Up 0 Vote Down

Cancel
thiruvenkata 6 months ago in reply to RobMan

Yeah RobMan, But I could only find layers for cdsTerm(), cdsName() and cdsParam() which are fixed, from documentation. But if I want to add cellName for my instance, what layer can be used? and what choice I need to use? These are my confusions, In some samples there is "unknown" as choice

BELOW IMAGE SAMPLE PCELL's choice.
Cancel
Vote Up 0 Vote Down

Cancel
RobMan 6 months ago in reply to thiruvenkata

And you didn't try my suggestion to investigate an existing symbol? As shown above...

lpp ("device" "annotate")
Cancel
Vote Up +1 Vote Down

Cancel
thiruvenkata 6 months ago in reply to RobMan

Yeah, it's working fine.

Thank you.

Can label choice be unknown? it's from one of the sample from other pdk.
Cancel
Vote Up 0 Vote Down

Cancel
Andrew Beckett 6 months ago in reply to thiruvenkata

The layer-purpose that a label is on is not that important; you can find out what it is by selecting the label in the symbol editor and then using:

car(geGetSelSet())~>lpp

All that "unknown" means is that it's not in one of the predetermined choices covered by the variable schSymbolLabelChoices (type this in the CIW) that Rob mentioned earlier.

Andrew
Cancel
Vote Up +1 Vote Down

Cancel
thiruvenkata 6 months ago in reply to Andrew Beckett

Thank you Rob and Andrew for your answers.

Thiru
Cancel
Vote Up 0 Vote Down

Cancel
RobMan 6 months ago in reply to thiruvenkata

If creating through the UI the label "choice" will affect the layer according to schSymbolLabelChoices. Using SKILL (dbCreateLabel) you will need to assign the correct attributes to the object.

This Article does it for a different label type, but should give you the gist...

SKILL: How can I add the "NLPLabel" [@cellName] for all symbols in a library?
Cancel
Vote Up +1 Vote Down

Cancel

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.