
Chapter 4: Backplane Ethernet 10GBASE-KR PHY IP Core 4–27
Register Interface and Register Descriptions
November 2012 Altera CorporationAltera Transceiver PHY IP Core
User Guide
0xD2
2RO
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 and bit 151.2 of IEEE 802.3ap-2007.
3RO
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 and
bit 151.3 of IEEE 802.3ap-2007.
4RO
Link Training Error
When set to 1, excessive errors occurred during Link
Training. When set to 0, the BER is acceptable.
5RO
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 0xD5
are the same as the initial parameter value, the frame lock
error was unrecoverable.
0xD3
9:0 RW
ber_time_frames
Specifies the number of training frames to examine for bit
errors on the link for each step of the equalization settings.
Used only when
ber_time_k_frames
is 0.The following
values are defined:
■ Value of 2 is about 10
3
bytes
■ Value of 20 is about 10
4
bytes
■ Value of 200 is about 10
5
bytes
The default value for simulation is 2’b11. The default value
for hardware is 0.
19:10 RW
ber_time_k_frames
Specifies the number of thousands of training frames to
examine for bit errors on the link for each step of the
equalization settings. Set
ber_time_m_frames
= 0 for
time/bits to match the following values:
■ Value of 3 is about 10
7
bits = about 1.3 ms
■ Value of 25 is about 10
8
bits = about 11ms
■ Value of 250 is about 10
9
bits = about 11 0ms
The default value for simulation is 0. The default value for
hardware is 0x15.
29:20 RW
ber_time_m_frames
Specifies the number of millions of training frames to
examine for bit errors on the link for each step of the
equalization settings. Set
ber_time_k_frames
= 4’d1000
= 0x3E8 for time/bits to match the following values:
■ Value of 3 is about 10
10
bits = about 1.3 seconds
■ Value of 25 is about 10
11
bits = about 11 seconds
■ Value of 250 is about 10
12
bits = about 110 seconds
Table 4–18. 10GBASE-KR Register Definitions (Part 8 of 12)
Word
Address
Bit R/W Name Description
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