Intel PCI-X Device ID Word 0Dh, 11h1, Vendor ID Word 0Eh, Initialization Control Word 2 Word 0Fh

EEPROM Interface

5.6.10Device ID (Word 0Dh, 11h1)

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.

For the 82546GB, the Device ID must be forced to 107Bh for SerDes-SerDes interface operation. For the 82545GM, the Device ID should be 1028h. This ensures proper functionality with Intel drivers and boot agent.

Note: Since the 82546GB/EB is a dual-port device, the Device ID in 0Dh corresponds to LAN A and the Device ID in 11h corresponds to LAN B.

5.6.11Vendor ID (Word 0Eh)

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.

5.6.12Initialization Control Word 2 (Word 0Fh)

This is the second word read by the Ethernet controller and contains additional initialization values that:

•Sets defaults for some internal registers

•Enables/disables specific features

Table 5-6. Initialization Control Word 2 (Word 0Fh)

Bit	Name	Description
		Initial value of the Assert PME On APM Wakeup bit in the Wakeup Control
15	APM PME# Enable	Register (WUC.APMPME).
		When set to 0b (default), deasserts PME# on wakeup.
		Set this bit to 1b for Intel LAN controller cards.
		When set to 0b (default), indicates the initial value of the Auto-Speed
14	ASDE	Detection Enable (ASDE) bit of the Device Control Register (CTRL).
		When set to 1b, enables 10/100/1000 Mb/s systems.
		Pause Capability - Mapped to TXCW[8:7].
		When set to 1b (default), enables desired PAUSE capability for an
13:12	PAUSE Capability	advertised configuration base page.
		When set to 0b, disables desired PAUSE capability for an advertised
		configuration base page.
	ANE	Auto-Negotiation Enable. Mapped to TXCW[31].
11	Reserved bit for the	Set this bit to 1b to automatically enable Auto-Negotiation.
	82541xx and	Set this bit to 0b (default) to automatically disable Auto-Negotiation.
	82547GI/EI (set to
		Note: Fiber implementations do not support this function.
	0b).
		Indicates FLASH size. 00b = 64 KB (default); 01b = 128 KB; 10b = 256 KB;
10:9	FLASH Size Indication	11b = 512 KB.
		These bits also impact the requested memory space for the FLASH and
		Expansion ROM BARs in PCI configuration space.

1.Word 11h only applicable to the 82546GB/EB.

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