A key feature of the STARTUPE3 component is to connect the user design to some of the dedicated configuration pins. These pins can be useful for accessing configuration flash as part of the user design. The STARTUPE3 represents connections to the external pins, so an input to the STARTUPE3 is a connection to an output pin or bidirectional pin. An output from STARTUPE3 is the bidirectional pin input back into the user design (see the following figure).
Figure 1. STARTUPE3 Connections to Dedicated Pins
