Filter
Top Products
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
56 January 2011
4.5.1.1 Ethernet Address (Words 00h – 02h)
The Ethernet Individual Address (IA) is a 6-byte field that must be unique for each Ethernet port and
each copy of the EEPROM image. The first three bytes are vendor specific. The value from this field is
loaded into the Receive Address Register 0 (RAL0/RAH0).
The Ethernet address is loaded for LAN0 and bit 41 (8th MSB) is inverted for LAN1 (bit 0 byte 6 in the
EEPROM = bit 8 in EEPROM word 2.
4.5.1.2 Initialization Control 1 (Word 0Ah)
This word read by the 82575 contains initialization values that:
• Set defaults for some internal registers.
• Enable or disable specific features.
• Determine which PCI configuration space values are loaded from the EEPROM.
044
047
04E
04F
000 000 000
001 001 001
002 002 002
020 020
010 010
02E 02E 02E
Table 6. Initialization Control 1 (Word 0Ah)
Bit(s) Name Default Description
15:12 Reserved 0000b Reserved
11 FRCSPD 1b Default setting for the Force Speed bit in the Device Control register (CTRL[11]). The
hardware default value is 1b.
0b = Do not force.
1b = Force.
10 FD 1b Default for duplex setting. Mapped to Device Control register bit 0. The hardware default
value is 1b.
0b = Half duplex.
1b = Full duplex.
9 LRST 1b Default setting for link reset (CTRL[3]). It should set to 0b for hardware to initiate Auto-
Negotiation upon power up or assertion of a PCIe* reset without driver intervention. The
hardware default value is 1b.
0b = Initiate auto-negotiation.
1b = Do not initiate auto-negotiation.
8:7 Reserved 00b Reserved.