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Intel
®
82575EB Gigabit Ethernet Controller — Hardware Accessed Words
Intel
®
82575EB Gigabit Ethernet Controller 324632-003
Software Developer’s Manual and EEPROM Guide Revision: 2.1
72 January 2011
4.5.1.22 Functions Control (Word 21h)
4.5.1.23 LAN Power Consumption (Word 22h)
This word is meaningful only if the EEPROM signature in word 0Ah is valid and Power Management is
enabled.
4.5.1.24 Management Hardware Configuration Control (Word
23h)
This word contains bits that direct special firmware behavior when configuring the PHY/PCIe*/SerDes.
Table 22. Functions Control (Word 21h)
Bit(s) Name Default Description
15:13 Reserved 000b Reserved.
12 LAN
Function
Select
0b When both LAN ports are enabled and the LAN function select equals 0b, LAN 0 is routed to
PCI function 0 and LAN 1 is routed to PCI function 1. If the LAN function select bit equals
1b, LAN 0 is routed to PCI function 1 and LAN 1 is routed to PCI function 0. This bit is
mapped to FACTPS[30].
11:0 Reserved 0h Reserved.
Table 23. LAN Power Consumption (Word 22h)
Bit(s) Name Default Description
15:8 LAN D0
Power
0h The value in this field is reflected in the PCI Power Management Data Register of the LAN
functions for D0 power consumption and dissipation (Data_Select = 0 or 4). Power is
defined in 100 mW units and includes the external logic required for the LAN function.
7:5 Function
0
Common
Power
0h The value in this field is reflected in the PCI Power Management Data Register of function 0
when the Data_Select field is set to 8 (common function). The most significant bits in the
Data Register that reflect the power values are padded with zeros.
4:0 LAN D3
Power
0h The value in this field is reflected in the PCI Power Management Data Register of the LAN
functions for D3 power consumption and dissipation (Data_Select = 3 or 7). Power is
defined in 100 mW units and includes the external logic required for the LAN function. The
most significant bits in the Data Register that reflect the power values are padded with
zeros.
Bit Name Description
15 LAN1_FTCO_DIS LAN1 force TCO reset disable (1 disable, 0 enable).
14 LAN0_FTCO_DIS LAN0 force TCO reset disable (1 disable, 0 enable).
13:1
0
Reserved Reserved.
9 Firmware Code Exist If set, indicates to the firmware that there is firmware EEPROM code at address
50h.
8 LAN1_OEM_DIS LAN1 OEM bits configuration disable.
0b = Enable.
1b = Disable.
7 LAN0_OEM_DIS LAN0 OEM bits configuration disable.
0b = Enable.
1b = Disable.