Intel PCI 사용자 설명서

244

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]