Altera 40-Gbps Ethernet MAC and PHY MegaCore Function - Manual (Page 186)

Word
Addr
Bit R/W Name Description
13:8 RO
LD coefficient
status[5:0]
Status report register for the contents of the second, 16-bit
word of the training frame most recently sent from the local
device control channel. The following fields are defined:
• [5:4]: Coefficient (post-tap)
• 2'b11: Maximum
• 2'b01: Minimum
• 2'b10: Updated
• 2'b00: Not updated
• [3:2]: Coefficient (0) (same encoding as [5:4])
• [1:0]: Coefficient (pre-tap) (same encoding as [5:4])
For more information, refer to bit 10G BASE-KR LD status
report register bit (1.155.5:0) in Clause 45.2.1.81 of IEEE
802.3ap
-
2007.
14 RO
Link Training
ready - LD
Receiver ready
When set to 1, the local device receiver has determined that
training is complete and is prepared to receive data. When set
to 0, the local device receiver is requesting that training
continue. Values for the receiver ready bit are defined in
Clause 72.6.10.2.4.4. For more information refer to For more
information, refer to bit 10G BASE-KR LD status report
register bit (1.155.15) in Clause 45.2.1.81 of IEEE
802.3ap
-
2007.
21:16 RO
or
RW
LP coefficient
update[5:0]
Reflects the contents of the first 16-bit word of the training
frame most recently received from the control channel.
Normally the bits in this register are read only; however,
when training is disabled by setting low the KR Training
enable control bit, these bits become writeable. The following
fields are defined:
• [5: 4]: Coefficient (+1) update
• 2'b11: Reserved
• 2'b01: Increment
• 2'b10: Decrement
• 2'b00: Hold
• [3:2]: Coefficient (0) update (same encoding as [5:4])
• [1:0]: Coefficient (-1) update (same encoding as [5:4])
For more information, refer to bit 10G BASE-KR LP
coefficient update register bits (1.152.5:0) in Clause
45.2.1.78.3 of IEEE 802.3ap
-
2007.
22 RO
or
RW
LP Initialize
Coefficients
When set to 1, the local device transmit equalizer coefficients
are set to the INITIALIZE state. When set to 0, normal
operation continues. The function and values of the initialize
bit are defined in Clause 72.6.10.2.3.2. For more information,
refer to bit 10G BASE-KR LP coefficient update register bits
(1.152.12) in Clause 45.2.1.78.3 of IEEE 802.3ap
-
2007.
UG-01088
2014.12.15
10GBASE-KR PHY Register Definitions C-13
10GBASE-KR Registers Altera Corporation
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