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AN Advertisement - PCS_ANADV (04218h; R/W) — Intel
®
82575EB Gigabit Ethernet Controller
324632-003 Intel
®
82575EB Gigabit Ethernet Controller
Revision: 2.1 Software Developer’s Manual and EEPROM Guide
January 2011 373
14.3.79 AN Advertisement - PCS_ANADV (04218h; R/
W)
AN REMOTE
FAULT
19 0b AN Remote Fault
This bit indicates that an AN page was received with a remote fault indication during an
AN process.
This bit cleared on reads.
AN ERROR
(RWS)
20 0B AN Error
This bit indicates that a AN error condition was detected in SerDes/SGMII mode. Valid
after the AN Complete bit is set.
AN error conditions:
SerDes mode:
Both node not Full Duplex or Remote Fault indicated or received.
SGMII mode:
PHY is set to1000 Mb/s Half Duplex mode.
Software can also force a AN error condition by writing to this bit (or can clear a
existing AN error condition).
This bit is cleared at the start of AN.
Reserved 31:21 0h Reserved
Field Bit(s)
Initial
Value
Description
Reserved 4:0 - Reserved
FDCAP 5 1b Full Duplex
Setting this bit indicates that the 82575 is capable of full duplex operation. This bit
should be set to 1b for normal operation.
HDCAP (RO) 6 0b Half Duplex
This bit indicates that the 82575 is capable of half duplex operation. This bit is tied to
0b because the 82575 does not support half duplex in SerDes mode.
ASM 8:7 0b
1
Local PAUSE Capabilities
The 82575's PAUSE capability is encoded in this field.
00b = No PAUSE.
01b = Symmetric PAUSE.
10b = Asymmetric PAUSE to link partner.
11b = Both symmetric an- asymmetric PAUSE to the 82575.
Reserved 11:9 - Reserved
RFLT 13:12 00b Remote Fault
The 82575's remote fault condition is encoded in this field. The 82575 might indicate a
fault by setting a non-zero remote fault encoding and re-negotiating.
00b = No error, link OK.
01b = Link failure.
10b = Offline.
11b = Auto-negotiation error.
Field Bit(s)
Initial
Value
Description