Bidirectional Buffer plus DDR Register for IGLOO®, ProASIC® 3, SmartFusion® and Fusion
The following figure illustrates the Bidirectional Buffer plus DDR Register for IGLOO, ProASIC3, SmartFusion and Fusion devices.

The following table describes the ports of an Bidirectional Buffer plus DDR Register for IGLOO, ProASIC3, SmartFusion and Fusion.
| Port Name | Size | Type | Required/Optional | Function |
|---|---|---|---|---|
| PAD | WIDTH | Input/Output | Required | Input/Output Data |
| DataR | WIDTH | Input | Required | Input Data |
| DataF | WIDTH | Input | Required | Input Data |
| QR | WIDTH | Output | Required | Output Data |
| QF | WIDTH | Output | Required | Output Data |
| TriEN | 1 | Input | Required | Bibuf-Enable |
| CLK | 1 | Input | Required | Clock |
| CLR | 1 | Input | Required | Clear |
