BUFGE

Global Low Early Clock Buffer

Eight Global Early buffers (BUFGE), two on each corner of the device, provide an earlier clock access than the potentially heavily loaded Global Low-Skew buffers (BUFGLS).

BUFGE can facilitate the fast capture of device inputs using the Fast Capture latches ILFFX and ILFLX. For fast capture, take a single clock signal and route it through both a BUFGE and a BUFGLS. Use the BUFGE to clock the fast capture latch and the BUFGLS to clock the normal input flip-flop or latch.

You can also use BUFGE to provide a fast Clock-to-Out on device output pins.