Fanin andf fanout cone

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santoshl

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Can any body help me to know abt FANIN and FANOUT cone.

where is it going to play its role?


Thanks
 

If you want to know what signals affect what other signals...

It is also used in formal verification
 

thanx thinke

but explain fanin n fanout cone in detail plz
 

santoshl said:
but explain fanin n fanout cone in detail plz
Click to expand...


Read the user guide of Formality (Formal verification tool from synopsys)....
 

In digital design, if you take a net or port or pin, there would be a logic cloud driving it, which is called its FANIN cone, and there would be one or more other nets/pins/ports which it will drive. A collection of all those, which a perticualar port/pin/net is driving is called its FANOUT cone.
As an example a D input of a FF in digital design, is point, which would have a FANIN cone, and a Q output of a FF in digital design is a point which will have a FANOUT cone.
A FANIN cone will consist of all signals which D is depending upon
A FANOUT cone will consist of all signals which depend upon Q.
Hope it helps.
If you are asking it in relatation to formality, you may find this site useful:
http://www.vlsiip.com/formality
Kr,
Avi
http://www.vlsiip.com
 

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