Intel PCI-X, Intel Gigabit Ethernet Controllers manual Ro,L

Register Descriptions

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

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