tfile in ncelab?

[Davy]

Hi all,

When I use ncelab of Cadence tools, I found something named "tfile". Is
it a timing file like "SDF" file? Or why use timing file in ncelab but
not ncsim?

Thanks!
Davy

 

[Michael]

I'm using this feature to disable timing check for certain parts of the
design.
Read the documentation.

Davy wrote:

Hi all,

When I use ncelab of Cadence tools, I found something named "tfile". Is
it a timing file like "SDF" file? Or why use timing file in ncelab but
not ncsim?

Thanks!
Davy

 

Yes, I am using it exactly the way Michael is using, for SDF
backannotated simulations.

Timing file is read during compilation time, thus it is used to disable
timing check in some parts of your netlist "statically", i.e. it is
disable throughout the complete simulation time starting at 0 ns till
simulation exit.

The PLI functions "$disable_warnings/$enable_warnings" do the same
thing dynamically", i.e. you can turn off/on during simulation time in
any way/order you want.

Utku.

Michael wrote:

I'm using this feature to disable timing check for certain parts of the
design.
Read the documentation.

Davy wrote:
Hi all,

When I use ncelab of Cadence tools, I found something named "tfile". Is
it a timing file like "SDF" file? Or why use timing file in ncelab but
not ncsim?

Thanks!
Davy