Timing Path Keywords
 
 
Timing constraints are applied to logic paths
Logic paths typically start and stop at pads, registers, latches, and RAM
The tool recognizes the following keywords to define endpoints or time groups:
PADS	All I/O pads
FFS		All flip-flops
LATCHES 	All latches
RAMS	All RAM elements
Keywords can be used globally, and to create design sub-groups