Description
Due to a problem in E-Tile Hard IP User Guide: E-Tile Hard IP for Ethernet and E-Tile CPRI PHY Intel FPGA IPs (UG-20160), en_pfc_port register is wrongly defined as ready only. In fact, it is a read-write register to enable TX PAUSE or TX PFC.
Resolution
This problem is currently scheduled to be fixed in a future release of the UG-20160.