Intel Intel Gigabit Ethernet Controllers SMBus Slave Address Word 14h1 low byte, 24h low byte

EEPROM Interface

Table 5-10. Initial Management Control Register Settings

Bit	Name	Description
		This bit is controlled by the ASF agent. Manually set this bit for
		TCO mode.
2	Reset on Force TCO	Reset the Ethernet controller on a ForceTCO SMBus Command
		with the “Force” bit set to 1b (default) in TCO mode, or on various
		conditions in ASF mode.
		Set this bit to 0b if the SMBus is disabled.
		This bit is controlled by the ASF agent.
1	ASF Mode	Set this bit to 1b to enable ASF mode.
		Set this bit to 0b (default) for TCO mode and Intel’s ASF Agent
		implementation.
		This bit is controlled by the ASF agent. Manually set this bit for
		TCO mode.
0	SMBus Enable	Set this bit to 1b (default) to enable SMBus functionality.
		Set this bit to 0b to enable ASF mode if its being routed by LAN A
		and if LAN A is the active interface for ASF to the BIOS.

Note: Since the 82546GB/EB is a dual-port device, the Management Control in 13h corresponds to LAN B, and the Management Control in 23h corresponds to LAN A.

5.6.25SMBus Slave Address (Word 14h1 low byte, 24h low byte)

The following table lists the SMBus slave address for TCO mode.

Table 5-11. SMBus Slave Address

Bit	Name	Description
		These bits are controlled by the ASF agent. Manually set these bits for
7:1	SMBus Slave Address	TCO mode.
		Contains the SMBus slave address for TCO mode. This address must
		be 1100b 100b for ASF mode.
0	Reserved	Set this bit to 0b.

Note: This byte must be C8h for ASF mode. For example, to program an address of 0011_001b, the byte

should be set to 0011_0010b. When this address is used on the SMBus, the address byte is 0011_0010b for writes and 0011_0011b for reads.

Note: Since the 82546GB/EB is a dual-port device, the SMBus Slave Address in 14h corresponds to LAN B, and the SMBus Slave Address in 24h corresponds to LAN A.

1.Applicable to the 82546GB/EB only.

114 Software Developer’s Manual