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PHY Registers — Intel
®
82575EB Gigabit Ethernet Controller
324632-003 Intel
®
82575EB Gigabit Ethernet Controller
Revision: 2.1 Software Developer’s Manual and EEPROM Guide
January 2011 313
14.3.8.2 PHY Status Register - PSTATUS (01d; R)
Speed Selection (LSB) 13 See Speed Selection (MSB), bit 6.
Note: If auto-negotiation is enabled, this bit is ignored.
R/W 1b
Loopback 14 1b = Enable loopback.
0b = Disable loopback.
R/W 0b
Reset 15 1b = PHY reset.
0b = Normal operation.
Note: When using PHY Reset, the PHY default configuration is
not loaded from the EEPROM.
WO,
SC
0b
Field Bit(s) Description Mode Default
Extended Capability 0 1b = Extended register capabilities. RO 1b
Jabber Detect 1 1b = Jabber condition detected.
0b = Jabber condition not detected.
RO
LH
0b
Link Status 2 1b = Link is up.
0b = Link is down.
RO,
LL
0b
Auto-Negotiation Ability 3 1b = PHY able to perform Auto-Negotiation.
0b = PHY is not able to perform Auto-Negotiation.
RO 1b
Remote Fault 4 1b = Remote fault condition detected.
0b = Remote fault condition not detected.
RO
LH
0b
Auto-Negotiation
Complete
5 1b = Auto-Negotiation process complete.
0b = Auto-Negotiation process not complete.
RO 0b
MF Preamble
Suppression
6 0b = PHY does not accept management frames with preamble
suppressed.
1b = PHY accepts management frames with preamble
suppressed.
RO 0b
Reserved 7 Reserved. Ignore on reads. RO 0b
Extended Status 8 1b = Extended status information in the Extended PHY Status
Register (15d).
0b = No extended status information in the Extended PHY Status
Register (15d).
RO 1b
100BASE-T2 Half
Duplex
9 0b = PHY not able to perform half duplex 100BASE-T2.
1b = PHY able to perform half duplex 100BASE-T2 (not
supported).
RO 0b
100BASE-T2 Full
Duplex
10 0b = PHY not able to perform full duplex 100BASE-T2.
1b = PHY able to perform full duplex 100BASE-T2 (not
supported).
RO 0b
10 Mb/s Half Duplex 11 1b = PHY able to perform half duplex 10BASE-T.
0b = PHY not able to perform half duplex 10BASE-T.
RO 1b
10 Mb/s Full Duplex 12 1b = PHY able to perform full duplex 10BASE-T.
0b = PHY not able to perform full duplex 10BASE-T.
RO 1b
Field Bit(s) Description Mode Default