You sure you need this? Scan enable is not supposed to toggle like the clock, skew should not be an issue. Hold it high for a bit, submit all the test vectors you want while it is stable. No skew problem.
It doesn't toggle like clock, this is right .. but it's highly loaded, it's supposed to reach every flop in the design , so it need to be buffered such like clock tree
It doesn't toggle like clock, this is right .. but it's highly loaded, it's supposed to reach every flop in the design , so it need to be buffered such like clock tree