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144 10/100 Mbps Ethernet Controller Family Open Source Software Developer Manual
Wake-up Functionality
A.5 Link Status Event
The controller may be configured to wake up the system on link disconnect and connect events.
The link status wake-up enable bit was added to the configuration command for the 82558 and later
generation devices. If this bit is set, the device generates a power management event when it
detects a link disconnect or connect. A link status event is indicated through the Power
Management Driver Register (PMDR).
Note: In the 82558 B-step, there is no indication to differentiate this event from any other wake-up event.
Frame storage is also not associated with it.
A.6 Flexible Packet Filtering
Programmable packet filtering is targeted to support wake-up packets that are not supported by the
hardware filters. Known wake-up packets are listed below.
Wake-up packets supported by the hardware filters are:
• ARP packets at EII packet with single IP address filtering
• Directed packet
• Multicast Address
• Magic Packet
• Link event
Wake-up packets not supported by hardware filters are:
• Directed IP packet
• Net BIOS queries
• 802.2 ARP
Multicast Match Wake
Enable
This bit enables assertion of the PME# signal upon reception of packets that
pass through the multicast address filtering. The PME# signal is further gated by
the PME enable bit in the PMCSR.
IP Address Low Byte
These bits are used for ARP frame filtering. These are the least significant bits
that make the low byte of the IP address, which is located in byte number 40 in a
packet without a VLAN header and byte number 44 in a packet with a VLAN
header.
IP Address High Byte
These bits are used for ARP frame filtering. They make the high byte of the IP
address, which is located in byte number 41 in a packet without a VLAN header
and byte number 45 in a packet with a VLAN header.
IA Match Wake Enable
This bit enables the assertion of the PME# signal upon reception of packets that
pass through the Individual Address filtering. The PME# signal is further gated
by the PME enable bit in the PMCSR.
Magic Packet Wake-up
Disable
This bit disables wake up upon reception of a Magic Packet frame.
Table 66. Fixed Wake-up Configuration Bits
Configuration Bit Description