Intel Intel Gigabit Ethernet Controllers, PCI-X manual 258

Register Descriptions

Table 13-28. 1000BASE-T Control Register Bit Description

Bit(s)	Field		Description	Mode	HW Rst	SW Rst
		000b	= Normal Mode.
		001b	= Test Mode 1 - Transmit
		Waveform Test.
		010b	= Test Mode 2 - Transmit Jitter
15:13	Test mode	Test (MASTER mode).		R/W	000b	000b
		011b = Test Mode 3 - Transmit Jitter
		Test (SLAVE mode).
		100b	= Test Mode 4 - Transmit
		Distortion Test.

101b, 110b, 111b = Reserved.

1.For the 82541xx and 82547GI/EI, only when PHY register 9, bit 12 is set to a logical 0.

2.0b for the 82541xx and 82547GI/EI only

3.For the 82541xx and 82547GI/EI, only when PHY register 9, bit 12 is set to a logical 1.

NOTES:

1.Values programmed in bits 12:8 of the 1000BASE-T Control Register have no effect unless Auto-Negotiation is restarted (PHY Control Register, bit 9) or the link goes down. These bits can also be overridden by the PHY Control Register.

2.The symbol “!” is equivalent to logical “not.”

3.For the 82541xx and 82547GI/EI, the default for bit 9 is affected by configuration bits in the EEPROM. If EEPROM ANI1000DIS is asserted, then the default is set to 0b. If EEPROM ADV10LU is asserted, then the default is set to 0b.

13.4.7.1.111000BASE-T Status Register

GSTATUS (10d; R)

Table 14-29. 1000BASE-T Status Register Bit Description

Field	Bit(s)	Description	Mode	HW Rst	SW Rst
Idle Error Count	7:0	Idle Error Counter.	RO,	0000b	0000b
		The counter stops at 1111b 1111b and
			SC	0000b	0000b
		does not roll over.
Reserved	9:8	Reserved. Should be set to 00b	RO	00b	00b
		1b = Link Partner is capable of
Link Partner		1000BASE-T half duplex.
		0b = Link Partner is not capable of
1000BASE-T	10		RO	0b	0b
		1000BASE-T half duplex.
Half Duplex
		Values in bits 11:10 are not valid until
Capability
		the ANE Register Page Received bit
		equals 1b.
		1b = Link Partner is capable of
Link Partner		1000BASE-T full duplex.
		0b = Link Partner is not capable of
1000BASE-T	11	1000BASE-T full duplex.	RO	0b	0b
Full Duplex Capability		Values in bits 11:10 are not valid until
		the ANE Register Page Received bit
		equals 1b.
Remote Receiver	12	1b = Remote Receiver OK.	RO	0b	0b
Status		0 b = Remote Receiver Not OK.

258 Software Developer’s Manual