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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
Arria V Device Datasheet
Cyclone V Device Datasheet
Stratix V Device Datasheet
Application Note 645: Dynamic Reconfiguration of PMA Controls in Stratix V Devices
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
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