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244 Software Developer’s Manual
Register Descriptions
13.4.7.1.2 PHY Status Register
PSTATUS (01d; R)
Table 13-17. PHY Status Register Bit Description
Field Bit(s) Description Mode HW Rst SW Rst
Extended Capability 0 1b = Extended register capabilities. RO Always 1b
Jabber Detect 1
1b = Jabber condition detected.
0b = Jabber condition not detected.
RO,L
H
0b 0b
Link Status 2
1b = Link is up.
0b = Link is down.
This register indicates whether link was
lost after the last read. For the current
link status, either read this register
back-to-back or read the Link Real Time
bit 17 in the PHY Specific Status
Register.
RO,
LL
0b 0b
Auto-Negotiation
Ability
3
1b = PHY able to perform Auto-
Negotiation.
RO Always 1b
Remote Fault 4
1b = Remote fault condition detected.
0b = Remote fault condition not
detected.
RO,L
H
0b 0b
Auto-Negotiation
Complete
5
1b = Auto-Negotiation process
complete.
0b = Auto-Negotiation process not
complete.
RO 0b 0b
MF Preamble
Suppression
6
1b = PHY accepts management frames
with preamble suppressed.
RO
Always 1b
(0b for the 82541xx
and 82547GI/EI)
Reserved 7 Reserved. Should be set to 0b RO Always 0b
Extended Status 8
1b = Extended status information in the
Extended PHY Status Register (15d).
RO Always 1b
100BASE-T2 Half
Duplex
9
0b = PHY not able to perform half
duplex 100BASE-T2.
RO Always 0b
100BASE-T2 Full
Duplex
10
0b = PHY not able to perform full duplex
100BASE-T2.
RO Always 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.
82544GC/EI only:
Bit 14 = Bit 13 = Bit 12 = Bit 11 =
(MODE[3:0] is not any of xx01b, 1x00b,
001xb, 0111b).
RO
RO
1b
MODE[3:0]