The Transceiver Reconfiguration Controller DFE registers information for address 0x1B (dfe_offset), offest 0x5 (tap 5) is not correct in the V-Series Transceiver PHY IP Core User Guide.
The correct settings for tap 5 coefficients and polarity are as follows:
|0x5||||RW||tap 5 polarity||
Specifies the polarity of the fifth post tap as follows:
|[1:0]||RW||tap 5||Specifies the coefficient for the fifth post tap. The valid range is 0–3.|
The V-Series Transceiver PHY IP Core User Guide is scheduled to be updated in a future release.