max fanout for input ports

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mo.khairy.mo

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Hi All,

Kindly can anyone explain to me why we need to limit the max fanout of all inputs to be 1

e.g. "set_max_fanout 1 [all_inputs]"

my understanding is that the max fanout should be constraind output pins only so why we constraint the max fanout of primary input ports?

Thanks in advance
 

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