10.5.2.3 No Buffering

The ‘no buffering’ option restricts the software from inserting buffers. This allows designers to manually use global clock resources for control signals. This also provides the ability to enhance performance of control signals by performing a logic function and correcting for fan-in by duplicating logic external to the core. If the signal is to be driven by a clock resource, you must set the signal width on the clock to 1; a signal width value of one (1) causes all loads to be driven by a single input.