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araongao2015
Explorer
Explorer
3,836 Views
Registered: ‎11-01-2015

When will the max_fanout be effective

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Hi all,

 

I use the following constraints in .xdc

 

set_property MAX_FANOUT 100 [get_cells myreg]

 

Could you tell me when it will be effective, by which I mean when vivado will replicate registers based on this constraint? during opt_design, place_design, phys_opt_design or route_design?

 

Thanks,

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araongao2015
Explorer
Explorer
5,480 Views
Registered: ‎11-01-2015

Hi @viviany,

 

Thank you very much. The AR is very useful and helpful.

View solution in original post

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viviany
Xilinx Employee
Xilinx Employee
3,826 Views
Registered: ‎05-14-2008

MAX_FANOUT is a Synthesis constraint, which will take effect in Synthesis process.

It does not affect any implementation step.

 

Please refer to UG901 and AR62162.

https://www.xilinx.com/support/answers/62162.html

 

Thanks

-vivian

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araongao2015
Explorer
Explorer
5,481 Views
Registered: ‎11-01-2015

Hi @viviany,

 

Thank you very much. The AR is very useful and helpful.

View solution in original post

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