| XC3000 | XC4000E | XC4000X | XC5200 | XC9000 | Spartan | SpartanXL | Virtex |
|---|---|---|---|---|---|---|---|
| N/A | N/A | N/A | N/A | N/A | N/A | N/A | Primitive |

BUFGDLL is a special purpose clock delay locked loop buffer for clock skew management. It is provided as a user convenience for the most frequently used configuration of elements for clock skew management. It consists of an IBUFG followed by a CLKDLL followed by a BUFG.