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Chapter 4: Backplane Ethernet 10GBASE-KR PHY IP Core 4–29
Register Interface and Register Descriptions
November 2012 Altera CorporationAltera Transceiver PHY IP Core
User Guide
0xD4
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 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 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
152.12 in Clause 45.2.1.78.3 of IEEE 802.3ap-2007.
23
RO or
RW
LP Preset Coefficients
When set to 1, The local device TX coefficients are set to a
state where equalization is turned off. Preset coefficients
are used. When set to 0, the local device operates
normally.
The function and values of the preset bit is defined in
72.6.10.2.3.1. The function and values of the initialize bit
are defined in Clause 72.6.10.2.3.2. For more information,
refer to bit 152.13 in Clause 45.2.1.78.3 of IEEE
802.3ap-2007.
Table 4–18. 10GBASE-KR Register Definitions (Part 10 of 12)
Word
Address
Bit R/W Name Description
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