What is the difference between the text display vs label?

On Nov 6, 7:35 pm, vlsidesign <ford...@gmail.com> wrote:

I was also curious once I stream out my database to a gds if they both
continue to retain a difference or if they both became text in gds.

Yes with default settings, when you stream out the database, the text
displays will become normal GDSII text and there's no way to tell that
it originally came from a pin.

-Jay-

 

[vlsidesign]

What is the difference between the text display vs label? They would
seem to be different "objects" in Cadence?? I am not sure how to think
about each of them. They both seem to be capable to have the same
layer-purpose pair.

I was also curious once I stream out my database to a gds if they both
continue to retain a difference or if they both became text in gds.
Just wondering, thanks for any insight.

 

[Andrew Beckett]

On Wed, 07 Nov 2007 03:35:12 -0000, vlsidesign <fordgwf@gmail.com> wrote:

What is the difference between the text display vs label? They would
seem to be different "objects" in Cadence?? I am not sure how to think
about each of them. They both seem to be capable to have the same
layer-purpose pair.

I was also curious once I stream out my database to a gds if they both
continue to retain a difference or if they both became text in gds.
Just wondering, thanks for any insight.

In addition to what Jay said, the difference is that a text display in the
Cadence database is associated with a specific object, and also a specific
property/attribute. So for example, you might have a text display associated
with a terminal object, and the "name" attribute. This means that text display
will always show the terminal name - even if the terminal name gets changed.
So it's a dynamic label.

Normal labels are fixed pieces of text.

Upon streamout, they end up as labels though, because the stream format
has no means of representing text displays directly - and also other tools
would expect simple labels. So they get evaluated and "hardened" (if you
like) at streamout time.

Regards,

Andrew.
--
Andrew Beckett
Senior Solution Architect
Cadence Design Systems, UK.

 

[vlsidesign]

On Nov 15, 12:47 am, Andrew Beckett <andr...@DcEaLdEeTnEcTe.HcIoSm>
wrote:

On Wed, 07 Nov 2007 03:35:12 -0000, vlsidesign <ford...@gmail.com> wrote:
What is the difference between the text display vs label? They would
seem to be different "objects" in Cadence?? I am not sure how to think
about each of them. They both seem to be capable to have the same
layer-purpose pair.

I was also curious once I stream out my database to a gds if they both
continue to retain a difference or if they both became text in gds.
Just wondering, thanks for any insight.

In addition to what Jay said, the difference is that a text display in the
Cadence database is associated with a specific object, and also a specific
property/attribute. So for example, you might have a text display associated
with a terminal object, and the "name" attribute. This means that text display
will always show the terminal name - even if the terminal name gets changed.
So it's a dynamic label.

Normal labels are fixed pieces of text.

snip

Thank you Andrew for extra insight, and also Jay