Altera Transceiver PHY IP Core User Manual
Page 533
Offset
Bits
R/W
Register Name
Description
0x3
[4:0]
RW
Pre-emphasis second post-tap
The following encodings are defined:
• 5’b00000 and 5’b10000: 0
• 5’b00001–5’b01111: -15 to -1
• 5’b10001–5b’11111: 1 to 15
0x10
[2:0]
RW
RX equalization DC gain
(17)
The following encodings are defined:
• 3’b000–3’b011:0–3
• 3'b100-3'b110:4
• 3'b111:Reserved
0x11
[3:0]
RW
RX equalization control
The following encodings are defined:
• 4’b0000–4’b1111: 0–15
0x20
[0]
WO Pre-CDR Reverse Serial Loopback
Writing a 1 to this bit enables reverse
serial loopback. Writing a 0 disables
pre-CDR reverse serial loopback.
0x21
[0]
WO Post-CDR Reverse Serial Loopback
Writing a 1 to this bit enables post-
CDR reverse serial loopback. Writing
a 0 disables post-CDR reverse serial
loopback.
Refer to Changing Transceiver Settings Using Register-Based Reconfiguration and Changing Transceiver
Settings Using Streamer-Based Reconfiguration for the procedures you can use to update PMA settings.
Related Information
•
•
•
•
Transceiver Reconfiguration Controller EyeQ Registers
EyeQ is a debug and diagnostic tool that analyzes the incoming data, including the receiver’s gain, noise
level, and jitter after the receive buffer. EyeQ is only available for Stratix V and Arria V GZ devices.
(17)
There are two possible methods to modify the RX linear equalization settings:
• Using the reconfiguration controller (offset 0x11)
• Using the QSF assignments
Different values are used for each method. The settings for using the reconfiguration controller range from 0
to 15 and the settings for using the QSF assignments are from 1 to 16. For example, setting 0 in the
transceiver reconfiguration controller corresponds to setting 1 for the QSF assignments and so forth.
16-16
Transceiver Reconfiguration Controller EyeQ Registers
UG-01080
2015.01.19
Altera Corporation
Transceiver Reconfiguration Controller IP Core Overview