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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
 

Thinkie

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

It is also used in formal verification
 

santoshl

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thanx thinke

but explain fanin n fanout cone in detail plz
 

deh_fuhrer

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santoshl said:
but explain fanin n fanout cone in detail plz


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

avimit

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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:
https://www.vlsiip.com/formality
Kr,
Avi
https://www.vlsiip.com
 

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