
Word
Addr
Bit R/W Name Description
18 RW Assert KR FEC
Request
When set to 1, indicates that the core is requesting the FEC
ability. When this bit changes, you must assert the Reset SEQ
bit (0xB0[0]) to renegotiate with the new value.
0xB1
0
R SEQ Link Ready When asserted, the sequencer is indicating that the link is
ready.
1 R SEQ AN timeout When asserted, the sequencer has had an Auto-Negotiation
timeout. This bit is latched and is reset when the sequencer
restarts Auto-Negotiation.
2 R SEQ LT timeout When set, indicates that the Sequencer has had a timeout.
13:8 R SEQ Reconfig
Mode[5:0]
Specifies the Sequencer mode for PCS reconfiguration. The
following modes are defined:
• Bit 8, mode[0]: AN mode
• Bit 9, mode[1]: LT Mode
• Bit 10, mode[2]: 10G data mode
• Bit 11, mode[3]: Gige data mode
• Bit 12, mode[4]: Reserved for XAUI
• Bit13, mode[5]: 10G FEC mode
16 R KR FEC Ability Indicates whether or not the 10GBASE-KR PHY supports
FEC. For more information, refer to the FEC variable FEC_
Enable as defined in Clause 74.8.2 and 10GBASE-KR PMD
control register bit (1.171.0) IEEE 802.3ap-2007.
17 R Enable KR FEC
Error Indication
Ability
When set to 1, indicates that the 10GBASE-KR PHY is
capable of reporting FEC decoding errors to the PCS. For
more information, refer to the KR FEC variable FEC_enable_
Error_to_PCS and 10GBASE-KR PMD control register bit
(1.171.1) as defined in Clause 74.8.3 of IEEE 302.3ap-2007.
0xB2
0 RW FEC TX trans
error
When asserted, indicates that the error insertion feature in
the FEC Transcoder is enabled.
1 RW FEC TX burst
error
When asserted, indicates that the error insertion feature in
the FEC Encoder is enabled.
5:2 RW FEC TX burst
length
Specifies the length of the error burst. Values 1-16 are
available.
10:6 Reserved
11 RWS
C
FEC TX Error
Insert
Writing a 1 inserts 1 error pulse into the TX FEC depending
on the Transcoder and Burst error settings. Software clears
this register.
31:15 RWS
C
Reserved
0xB3 31:0 RSC FEC Corrected
Blocks
Counts the number of corrected FEC blocks. Resets to 0
when read. Otherwise, it holds at the maximum count and
does not roll over. Refer to Clause 74.8.4.1 of IEEE 802.3ap-
2000 for details.
4-34
10GBASE-KR PHY Register Definitions
UG-01080
2015.01.19
Altera Corporation
Backplane Ethernet 10GBASE-KR PHY IP Core with Early Access FEC Option
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