User guide
Table 2-134: 1G/10GbE Register Definitions
Word
Addr
Bit R/W Name Description
0x4
B0
0
RW Reset SEQ When set to 1, resets the 10GBASE-KR sequencer (auto
rate detect logic), initiates a PCS reconfiguration, and
may restart Auto-Negotiation (AN), Link Training (LT),
or both if AN and LT are enabled (10GBASE-KR mode).
SEQ Force Mode[2:0] forces these modes. This reset self
clears.
1 RW Disable AN Timer AN disable timer. If disabled ( Disable AN Timer = 1) ,
AN may get stuck and require software support to
remove the ABILITY_DETECT capability if the link
partner does not include this feature. In addition,
software may have to take the link out of loopback mode
if the link is stuck in the ACKNOWLEDGE_DETECT
state. To enable this timer set Disable AN Timer = 0.
2 RW Disable LF Timer When set to 1, disables the Link Fault timer. When set to
0, the Link Fault timer is enabled.
3 RW fail_lt_if_ber When set to 1, the last LT measurement is a non-zero
number. Treat this as a failed run. 0 = Normal.
7:4 RW SEQ Force Mode[2:0]
Other than the "No force" mode (0x4B0[7:4] = 4'b0000),
you must write the Reset SEQ (0x4B0[0]) to 1 when
switching to the required data mode by changing
(forcing) the 0x4B0[7:4] bits. The following encodings
are defined:
• 0000: No force
• 0001: GbE
• 0010: XAUI
• 0100: 10GBASE-R
• 0101: 10GBASE-KR
• 1100: 10GBASE-KR FEC
8
RW Enable Arria 10
Calibration
When set to 1, it enables the Arria 10 HSSI reconfigura‐
tion calibration as part of the PCS dynamic reconfigura‐
tion. 0 skips the calibration when the PCS is reconfig‐
ured.
16 RW KR FEC enable 171.0 When set to 1, FEC is enabled. When set to 0, FEC is
disabled. Resets to the CAPABLE_FEC parameter value.
17 RW KR FEC enable err
ind 171.1
When set to 1, KR PHY FEC decoding errors are signaled
to the PCS. When set to 0, FEC errors are not signaled to
the PCS. See Clause 74.8.3 of IEEE 802.3ap-2007 for
details.
18 RW KR FEC request When set to 1, enables the FEC request. When this bit
changes, you must assert the Reset SEQ bit (0x4B0[0]) to
renegotiate with the new value. When set to 0, disables
the FEC request.
2-184
Register Definitions
UG-01143
2015.05.11
Altera Corporation
Implementing Protocols in Arria 10 Transceivers
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