There are physical status pins that are recommended to be accessible on the
board for debug. The two most important pins are the INIT_B and the DONE. INIT_B rising from Low to High indicates the completion of
initialization after power-up, and then the falling INIT_B signal later in the process can indicate a CRC error. DONE indicates a successful configuration of the device. In
addition to the status signals there are key configuration pins that provide helpful
information and should be handled carefully to prevent problems during configuration.
These pins include: