
16–14 Chapter 16: Transceiver Reconfiguration Controller IP Core
EyeQ Registers
Altera Transceiver PHY IP Core November 2012 Altera Corporation
User Guide
f Refer to the Arria V Device Datasheet, the Cyclone V Device Datasheet, or the Stratix V
Device Datasheet for more information about the electrical characteristics of each
device. The final values are currently pending full characterization of the silicon.
1 All undefined register bits are reserved and must be set to 0.
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.
f Refer to Application Note 645: Dynamic Reconfiguration of PMA Controls in Stratix V
Devices for an example demonstrating the use of the 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 devices.
Table 16–11. PMA Offsets and Values
Offset Bits R/W Register Name Description
0x0 [5:0] RW V
OD
V
OD.
The following encodings are defined:
■ 6’b000000:6’b111111:0–63
0x1 [4:0] RW
Pre-emphasis pre-tap
The following encodings are defined:
■ 5’b00000–5’b10000: 0
■ 5’b00001–5’b01111: -15 to -1
■ 5’b10001–5b’11111: 1 to 15
0x2 [4:0] RW
Pre-emphasis first post-tap
The following encodings are defined:
■ 5’b00000–5’b11111: 0–31
0x3 [4:0] RW
Pre-emphasis second post-tap
The following encodings are defined:
■ 5’b00000–5’b10000: 0
■ 5’b00001–5’b01111: -15 to -1
■ 5’b10001–5b’11111: 1 to 15
0x10 [2:0] RW
RX equalization DC gain
The following encodings are defined:
■ 3’b000–3b’111:0–4
0x11 [3:0] WO
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.
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