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74 Intel 8255x 10/100 Mbps Ethernet Controller Family Open Source Software Developer Manual
Host Software Interface
device transfers data to and from the link. Software should always set this bit to 0 when it
is issuing a configure command with more than 8 bytes.
0 = Enable.
1 = Disable.
Default - 0.
Recommended - 0.
• BYTE 9.
— Bit 7 - Multicast Match Wake Enable.
This bit is available only in the 82558 B-step. It should be set to 0 on 82557, 82558 A-
step, and 82559 devices.
This bit enables assertion of the power management event signal (PME#) upon reception
of packets that pass the multicast address filtering. The PME# signal is further gated by
the PME enable bit in the PMCSR. Although this bit is not present in the 82559, this
functionality is present through the extended wake-up packet command.
0 = Disabled.
1 = Enabled.
Default - 0 (disabled).
Recommended - 0.
— Bit 6 - ARP Wake-up Enable.
This bit is available only in the 82558 B-step. It should be set to 0 on the 82557, 82558 A-
step, and 82559 devices.
This bit enables assertion of the power management event signal (PME#) upon reception
of ARP frames (as defined above). The PME# signal is further gated by the PME enable
bit in the PMCSR. Although this bit is not present in the 82559, this functionality is
present through the extended wake-up packet command.
0 = Disabled.
1 = Enabled.
Default - 0 (disabled).
Recommended - 0.
— Bit 5 - Link Status Change Wake Enable. This bit is available only in the 82558 B-step
and the 82559. It should be set to 0 on the 82557 and 82558 A-step devices.
This bit enables assertion of PME# upon a link status change event. The PME# signal is
further gated by the PME enable bit in the PMCSR.
0 = Disabled.
1 = Enabled.
Default - 0 (disabled).
Recommended - 0.
— Bit 4 - VLAN ARP (82558 B-step) or VLAN TCO (82559). This bit is available only in
the 82558 B-step and 82559. It should be set to 0 on 82557 and 82558 A-step devices.
VLAN ARP: For the 82558 B-step, this bit enables wake-up upon reception of ARP
frames with a dynamic presence of a VLAN header. This bit takes affect only if the ARP
wake-up enable bit is also set. This same functionality has been moved on the 82559 to
the extended wake-up packet command.
0 = VLAN header not supported.
1 = Dynamic VLAN header supported.