[question] ASIC Library

[Raptor]

Hi All,

I was going through magma, while analyzing a library found that
some of the cells in the library have a pre defined hidden property.
If these cells are not meant to be used, then why are they present in
the library?

Thanks in Advance

 

[au_sun]

the cells that got hidden doesnot have the properties to be supercell,

they may be present in the library, but doesnot have the properties of being a supercell such as constant gain, linearily increasing load & capacitance etc,

so they are hidden during library preparation, some time the foundry people mention some cells are not usable, but they are present in the library, u need to hide those cells manually,

 

[stocking]

hi guy!!
I want to ask you a question: volcano library used by m@gma is how to obtain??? thanks for your help!!!

 

[nittinsharma80]

Hi alll
i also have a qn relted to libraries
what are SPM libraries.
kindly point me to a link / doc describing library models etc
regards

 

[funzero]

some cells are not used during optimization .
for ex: clk buffer are only used for clock tree synthesis.
pad cell are used only for bonding.