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I/O and power pads in floorplanning

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ravi_meghadri

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Hello frnds! I have few doubts on libraries
what is the extension for I/O and power pad library? what information does it contains? to do floorplanning, what all are the libraries we need? I posted the same doubt few days back, but looking for more elaboreted reply
 

which flow are you using ? I mean magma/synopsys/cadence ?

Each vendor has its own library format and hence extenstion, as well as contents.
 

Hi,

Each design has IO Libraries apart from technology libraries.

Thus, for Cadence and Synopsys tool you can find IO.lef file mentioned. This file actually contains the physical information about the IO pads such as the metal layers, pitch, width, height, and obstructions.

In the same way if it is a power pad, you can find in the .library the power values such as current density and other power values.

These info. is very helpful in building a power mesh for the design.


thx

snr_vlsi
 

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