How do I disable Pre-CDR or Post-CDR Reverse Serial Loopback on Stratix V, Arria V, and Cyclone V transceiver devices?

Description

Pre-CDR or Post-CDR  Reverse Serial Loopback can be disabled on Stratix® V, Arria® V, and Cyclone® V transceiver devices by writing a 0 to either the Pre-CDR or Post-CDR Reverse Serial Loopback PMA Offset registers.