Intel PCI-X manual Subsystem ID Word 0Bh, Subsystem Vendor ID Word 0Ch

EEPROM Interface

Table 5-5. Initialization Control Word 1 (Word 0Ah)

		82541xx and 82547GI/EI Only
		This bit is used to define the usage of the internal 1.2 V dc and 1.8 V dc
7	Internal VREG Power	regulators to supply power.
	Down Control	0b = Yes (default).
		1b = No (external regulators used).
		Note: Reserved bit for all other Ethernet controllers.
Bit	Name	Description
6:5	Reserved	Reserved for future use. Set these bits to 0b.
4	Reserved	Reserved for copper PHY. Set this bit to 0b.
		When set to 1b (default), enables full support for power management.
		When set to 0b, the Power Management Registers set is read only. The
3	Power Management	Ethernet controller does not execute a hardware transition to D3.
		Note: Reserved bit for the 82541PI/GI/EI and 82547GI/EI (set to 1b).
		Note: Reserved bit for the 82541ER (set to 0b).
		When set to 0b (default), indicates that the PCICLK is not required for
2	PME Clock	PME# output.
		When set to 1b, indicates that the PCICLK is required for PME# output.
		Note: Reserved bit for the 82541xx and 82547GI/EI (set to 0b).
		When set to 1b (default), indicates that the Ethernet controller is to load its
		PCI Subsystem ID and Subsystem Vendor ID from the EEPROM (words
1	Load Subsystem IDs	0Bh, 0Ch).
		When set to 0b, indicates that the Ethernet controller is to load the default
		PCI Subsystem ID and Subsystem Vendor ID.
		When set to 0b (default), indicates that the Ethernet controller is to load the
0	Load Vendor/Device	default values for PCI Vendor and Device IDs.
		When set to 1b (default for the 82541xx and 82547GI/EI only), indicates
	IDs
		that the Ethernet controller is to load its PCI Vendor and Device IDs from
		the EEPROM (words 0Dh, 0Eh).

a. Not applicable to the 82541xx, 82547GI/EI or 82540EP/EM.

5.6.8Subsystem ID (Word 0Bh)

If the signature bits (15:14) and bit 1 (Load Subsystem IDs) of word 0Ah are valid, this word is read in to initialize the Subsystem ID.

5.6.9Subsystem Vendor ID (Word 0Ch)

If the signature bits (15:14) and bit 1 (Load Subsystem IDs) of word 0Ah are valid, this word is read in to initialize the Subsystem Vendor ID.

106 Software Developer’s Manual