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

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