Altera Low Latency 40-Gbps Ethernet MAC and PHY MegaCore Function - Manual (Page 173)

Word Addr Bit R/W Name Description
0x4D2
0 RO
Link Trained -
Receiver status
When set to 1, the receiver is trained and is ready
to receive data. When set to 0, receiver training is
in progress. For more information, refer to the
state variable rx_trained as defined in Clause
72.6.10.3.1 of IEEE 802.3ap
-
2007.
1 RO
Link Training Frame
lock
When set to 1, the training frame delineation has
been detected. When set to 0, the training frame
delineation has not been detected. For more
information, refer to the state variable frame_lock
as defined in Clause 72.6.10.3.1 of IEEE
802.3ap
-
2007.
2 RO
Link Training
Start-up protocol
status
When set to 1, the start-up protocol is in progress.
When set to 0, start-up protocol has completed.
For more information, refer to the state training as
defined in Clause 72.6.10.3.1 of IEEE 802.3ap
-
2007.
3 RO
Link Training
failure
When set to 1, a training failure has been detected.
When set to 0, a training failure has not been
detected For more information, refer to the state
variable training_failure as defined in Clause
72.6.10.3.1 of IEEE 802.3ap-2007.
4 RO
Link Training Error
When set to 1, excessive errors occurred during
Link Training. When set to 0, the BER is
acceptable.
5 RO
Link Training Frame
lock Error
When set to 1, indicates a frame lock was lost
during Link Training. If the tap settings specified
by the fields of 0x4D5 are the same as the initial
parameter value, the frame lock error was unrecov‐
erable.
6 RO
RXEQ Frame Lock
Loss
Frame lock not detected at some point during
RXEQ, possibly triggering conditional RXEQ
mode.
7 RO
CTLE Fine-grained
Tuning Error
Could not determine the best CTLE due to
maximum BER limit at each step in the Fine-
grained Tuning mode.
B-14 10GBASE-KR PHY Register Definitions
UG-01172
2015.05.04
Altera Corporation Arria 10 10GBASE-KR Registers
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