Display of schematic name and page number on the symbol

Hi Mandar,

dsp() is not a Cadence function, so it must have been somewhere in your customization for IC5141. You'll need to locate the code, and bring it across to your IC61 environment.

Best Regards,

Andrew.

Thanks, Andrew!

I'm not sure if I can get the custom code. Otherwise, is there a way to take the values entered for the sheet e.g. title, owner, description etc and somehow display them on the symbol along with instance number etc for improved readability?

Regards,
Mandar

Yes. Look in the sheets in the US_8ths library that is in the software installation.

Also see the chapter "Creating a Multisheet Schematic" in the  Virtuoso Schematic L User Guide (file <instDir>/doc/comphelp/comphelp.pdf). Even if you're not creating multisheet schematics, this chapter talks about customizing sheet symbols. The labels are all interpreted labels (either NLP or SKILL Labels).

Regards,

Andrew.

Please excuse this random looking post, I sent this post right away but the email-post mechanism is obviously still having problems.

I will continue to just use the web interface in future.

Regards,

Lawrence.

 Thanks for your help!

 I looked at the multisheet chapter for some clues. I have a custom sheet as a symbol which I instance and place around my schematics. On the symbol of the schematic, to display the schematic name, I can create an NLP label called [@cellName].

To access the sheet number, I am not sure what label works. I have tried a few but I suppose I am not accessing the sheet symbol first. e.g [@SHEET], [@description], [@owner] etc are sheet labels. How do I print them on the symbol?

Regards,

Mandar

Hi Mandar,

[@sheetNumber] gives the sheet number. And [@maxSheets] gives the number of sheets. Look at the Title symbol in the US_8ths sample library. The sheets in US_8ths have an instance of Title (and an instance of revBlock) in them, and that takes care of those NLP labels.

Regards,

Andrew.

 Hi Andrew,

 The [@sheetNumber] and [@maxSheets] are on the symbol for the sheet. When I put the sheet around my schematic, lets say an opamp diff pair, I manually enter a sheet number for this schematic. Now when I instance this opamp in another circuit, I want to display the sheet number of the opamp when I place the symbol for it. To do this, I need to edit the symbol of the opamp and add some label there which will access the sheet number that I manually entered. 

I tried putting [@sheetNumber] but that didn't work. 

 Regards,
Mandar

That's not really what it's for - it's for handling multi-sheet schematics (i.e. when a single level of hierarchy is broken up into multiple sheets, because the schematic complexity is too great). It's not something that gets widely used in IC design; more prevalent in PCB design.

So is this sheet number you're talking about more of a "reference" number? I'm trying to understand what you're actually wanting it to do before I make any suggestions.

Regards,

Andrew.

 Yes. The sheet is used for every schematic and has a unique number. After making hardcopy of the design, this number will be the refernce to easily find the shematic that you are looking for. This is just for documentation purposes. When I am accessing the design trhough Cadence, I can just descend into the hierarchy. However, when I print hardcopies, the sheet number will help to locate the schematic for the particular block.

The multisheet schematic option is actually not used anywhere in the design.

 Regards,
Mandar