Altera Low Latency 40-Gbps Ethernet MAC and PHY MegaCore Function User Manual
Page 164
Word Addr
Bit
R/W
Name
Description
0x4C0
0
RW
AN enable
When set to 1, enables Auto Negotiation function.
The default value is 1. For additional information,
refer to 7.0.12 in Clause 73.8 Management Register
Requirements, of IEEE 802.3ap-2007.
1
RW
AN base pages ctrl
When set to 1, the user base pages are enabled. You
can send any arbitrary data via the user base page
low/high bits. When set to 0, the user base pages
are disabled and the state machine generates the
base pages to send.
2
RW
AN next pages ctrl
When set to 1, the user next pages are enabled. You
can send any arbitrary data via the user next page
low/high bits. When set to 0, the user next pages
are disabled. The state machine generates the null
message to send as next pages.
3
RW
Local device remote
fault
When set to 1, the local device signals Remote
Faults in the Auto Negotiation pages. When set to
0 a fault has not occurred.
4
RW
Force TX nonce
value
When set to 1, forces the TX nonce value to
support some UNH testing modes. When set to 0,
this is normal operation.
5
RW
Override AN
Parameters Enable
When set to 1, overrides the
AN_TECH
,
AN_FEC
, and
AN_PAUSE
parameters and uses the bits in 0xC3
instead. You must reset the Sequencer to
reconfigure and restart into Auto Negotiation
mode. When set to 0, this is normal operation and
is used with 0x4B0 bit 0 and 0x4C3 bits[30:16].
0x4C1
0
RW
Reset AN
When set to 1, resets all the 10GBASE-KR Auto
Negotiation state machines. This bit is self-
clearing.
4
RW
Restart AN TX SM
When set to 1, restarts the 10GBASE-KR TX state
machine. This bit self clears. This bit is active only
when the TX state machine is in the Auto Negotia‐
tion state. For more information, refer to 7.0.9 in
Clause 73.8 Management Register Requirements of
IEEE 802.3ap-2007.
8
RW
AN Next Page
When asserted, new next page info is ready to
send. The data is in the XNP TX registers. When 0,
the TX interface sends null pages. This bit self
clears. Next Page (NP) is encoded in bit D15 of
Link Codeword. For more information, refer to
Clause 73.6.9 and 7.16.15 of Clause 45.2.7.6 of
IEEE 802.3ap-2007.
UG-01172
2015.05.04
10GBASE-KR PHY Register Definitions
B-5
Arria 10 10GBASE-KR Registers
Altera Corporation