It is a timing constraint that covers the path from the input pin to the synchronization element.
CPLD CoolRunner -II Family 750 Gates 32 Macro Cells 200MHz 0.18um, CMOS Technology 1.8V 44-Pin VQFP
CPLD CoolRunner -II Family 9K Gates 384 Macro Cells 125MHz 0.18um Technology 1.8V 256-Pin FTBGA
CPLD CoolRunner -II Family 9K Gates 384 Macro Cells 125MHz 0.18um Technology 1.8V 208-Pin PQFP
FPGA Spartan-3 Family 50K Gates 1728 Cells 630MHz 90nm Technology 1.2V 208-Pin PQFP
FPGA Spartan-3 Family 50K Gates 1728 Cells 630MHz 90nm Technology 1.2V 144-Pin TQFP
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