| Element | XC3000 | XC4000E | XC4000X | XC5200 | XC9000 | Spartan | SpartanXL | Virtex |
|---|---|---|---|---|---|---|---|---|
| OPAD | Primitive | Primitive | Primitive | Primitive | Primitive | Primitive | Primitive | Primitive |
| OPAD4, OPAD8, OPAD16 | Macro | Macro | Macro | Macro | Macro | Macro | Macro | Macro |
OPAD, OPAD4, OPAD8, and OPAD16 are single and multiple output pads. An OPAD connects a device pin to an output signal of a PLD. It is internally connected to an input/output block (IOB), which is configured by the software as an OBUF, an OBUFT, an OBUFE, an OFD, or an OFDT.
Refer to the appropriate CAE tool interface user guide for details on assigning pin location and identification.
Figure 8.47 OPAD8 Implementation XC3000, XC4000, XC5200, XC9000, Spartans, Virtex |  |
