Hi,
I develop Xilinx FPGAs and I am interested in dealing with a maximum fanout of a signal issued from a FF and going to an increasing number of FF. What kind of constraint and/or attribute I can set to this signal so that when the fanout exceeds a certain number I am SURE an extra FF is created. I am using Leonardo and M5.1i. I have used the max_fanout attribute of leonardo but it doesn't seem to make much of anything (anyway there is no replication). Thank you for any suggestion.
JF