How to calculate the switching activity ??

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leeguoxian

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In Power Compiler , it propagates switching activity through the unannotated portions of your design .

How does PowerCompiler calculate the output switching activity if we only know the input switching activity ???

For example , a 2 input XOR gate , if the switching activity is 0.1 of input A and
0.2 of input B, then what is the switching activity of outupt Z ??
 

It calculated as follows:

Switching activity of clock signal is clock frequency.

Switching activity of data signal is 50% of clock frequency.
 

vlsi_deepa said:
Switching activity of data signal is 50% of clock frequency.
Click to expand...

Do you mean all the data signals have the same switching activity(50% of clock freq) ???

But it seems ecah net has its only switching activity from Power Compiler report.
 

hi, the output Z has 0.15 switching rate.
 

qingliliu said:
hi, the output Z has 0.15 switching rate.
Click to expand...

hi , qingliliu :
Could you tell me how to calculate the output switching rate ??
 

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