Intel Arria 10 User Manual page 158

Word Bit R/W
Addr
14 RO
0x4D4 21:16 RO or
RW
22 RO or
RW
23 RO or
RW
0x4D4 29:24 RO
® ®
Intel Arria 10 Transceiver PHY User Guide
158
Name
•
•
•
For more information, refer to 10G BASE-KR LD status report
register bit (1.155.5:0) in Clause 45.2.1.81 of IEEE
802.3ap-2007.
When set to 1, the local device receiver has determined that
Link Training ready
training is complete and is prepared to receive data. When set
- LD Receiver ready
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 10G
BASE-KR LD status report register bit (1.155.15) in Clause
45.2.1.81 of IEEE 802.3ap-2007.
Reflects the contents of the first 16-bit word of the training
LP coefficient
frame most recently received from the control channel.
update[5:0]
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 writable. The following
fields are defined:
•
•
•
For more information, refer to 10G BASE-KR LP coefficient
update register bits (1.152.5:0) in Clause 45.2.1.78.3 of IEEE
802.3ap-2007.
When set to 1, the local device transmit equalizer coefficients
LP Initialize
are set to the INITIALIZE state. When set to 0, normal
Coefficients
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 10G BASE-KR LP coefficient update register bits
(1.152.12) in Clause 45.2.1.78.3 of IEEE 802.3ap-2007.
When set to 1, the local device TX coefficients are set to a
LP Preset
state where equalization is turned off. Preset coefficients are
Coefficients
used. When set to 0, the local device operates normally. The
function and values of the preset bit are 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 10G BASE-KR LP coefficient update register bits (1.152.13)
in Clause 45.2.1.78.3 of IEEE 802.3ap-2007.
Status report register reflects the contents of the second, 16-
LP coefficient
bit word of the training frame most recently received from the
status[5:0]
control channel: The following fields are defined:
2. Implementing Protocols in Arria 10 Transceivers
Description
[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])
[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])
UG-01143 | 2018.06.15
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