4.1.2. Synchronizer (DPA FIFO)
The synchronizer can compensate only for phase differences, not frequency differences, between the data and the input reference clock of the receiver.
The optional rx_fifo_reset signal resets the synchronizer. The synchronizer resets automatically when the DPA block first locks to the incoming data. If your data checker indicates corrupt received data, use rx_fifo_reset to reset the synchronizer.