Altera Transceiver PHY IP Core - Manual (Page 536)

Offset Bits R/W Register Name Description
0x3
[15:4] RMW Reserved You should not modify these bits. To update this
register, first read the value of this register then
change only the value for bits that are not
reserved.
[13] RW
1D-Eye
Writing a 1 to this bit selects 1D Eye mode and
disables vertical height measurement. Writing a 0
to this bit selects normal 2D Eye measurement
mode including both the horizontal and vertical
axes. You must use 1D Eye mode if you have
enabled DFE.
[12:3] RMW Reserved You should not modify these bits. To update this
register, first read the value of this register then
change only the value for bits that are not
reserved.
[2] RW
Polarity
(18) Specifies the sign of the
Vertical height
.
When 0, the
Vertical height
is negative. When
1, the
Vertical height
is positive.
[1:0] RMW Reserved You should not modify these bits. To update this
register, first read the value of this register then
change only the value for bits that are not
reserved.
0x5 [31:0] R
Bit Counter[31:0]
Only valid when the
BERB Enable
and
Counter
Enable
bits are set.
Bit Counter[63:0]
reports the total number of
bits received since you enabled or reset BER
counters. Each increment represents 256 bits.
0x6 [31:0] R
Bit Counter[63:32]
0x7 [31:0] R
Err Counter[31:0]
Only available when the
BERB Enable
and
Counter Enable
bits are set.
Err Counter[63:0]
reports the total number of error bits received
since you enabled or reset BER counters.
0x8 [31:0] R
Err Conter[63:32]
Refer to Changing Transceiver Settings Using Register-Based Reconfiguration for the procedures you can
use to control the Eye Monitor.
EyeQ Usage Example
This section provides an example of accessing the EyeQ registers and using the Bit Error Rate Block
(BERB).
When the BERB is enabled, the serial bit checker compares the data from CDR path and EyeQ path. The
BERB accumulates the total received bit numbers and the error bit numbers. You can use the BERB block
(18) Writing a 1 to the
Enable Eye Monitor
register will reset the polarity to be positive.
UG-01080
2015.01.19
EyeQ Usage Example 16-19
Transceiver Reconfiguration Controller IP Core Overview Altera Corporation
Send Feedback