FW82801BA S L5PN Intel, FW82801BA S L5PN Datasheet - Page 95
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FW82801BA S L5PN
Manufacturer Part Number
FW82801BA S L5PN
Description
Manufacturer
Intel
Datasheet
1.FW82801BA_S_L5PN.pdf
(671 pages)
Specifications of FW82801BA S L5PN
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82801EB ICH5 / 82801ER ICH5R Datasheet
Note: If the Wake on LAN bit in the EEPROM is not set, wake-up events are supported only if the PME
Wake-Up Events
There are two types of wake-up events: “Interesting” Packets and Link Status Change. These two
events are detailed below.
Enable bit in the Power Management Control/Status Register (PMCSR) is set. However, if the
Wake on LAN bit in the EEPROM is set, and Wake on Magic Packet* or Wake on Link Status
Change are enabled, the Power Management Enable bit is ignored with respect to these events. In
the latter case, PME# would be asserted by these events.
“Interesting” Packet Event
In the power-down state, the LAN controller is capable of recognizing “interesting” packets. The
LAN controller supports pre-defined and programmable packets that can be defined as any of the
following:
This allows the LAN controller to handle various packet types. In general, the LAN controller
supports programmable filtering of any packet in the first 128 bytes.
When the LAN controller is in one of the low power states, it searches for a predefined pattern in
the first 128 bytes of the incoming packets. The only exception is the Magic Packet, which is
scanned for the entire frame. The LAN controller classifies the incoming packets as one of the
following categories:
Link Status Change Event
The LAN controller link status indication circuit is capable of issuing a PME on a link status
change from a valid link to an invalid link condition or vice versa. The LAN controller reports a
PME link status event in all power states. If the Wake on LAN bit in the EEPROM is not set, the
PME# signal is gated by the PME Enable bit in the PMCSR and the CSMA Configure command.
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ARP Packets (with Multiple IP addresses)
Direct Packets (with or without type qualification)
Magic Packet
Neighbor Discovery Multicast Address Packet (‘ARP’ in IPv6 environment)
NetBIOS over TCP/IP (NBT) Query Packet (under IPv4)
Internetwork Package Exchange* (IPX) Diagnostic Packet
No Match: The LAN controller discards the packet and continues to process the incoming
packets.
TCO Packet: The LAN controller implements perfect filtering of TCO packets. After a TCO
packet is processed, the LAN controller is ready for the next incoming packet. TCO packets
are treated as any other wake-up packet and may assert the PME# signal if configured to do so.
Wake-up Packet: The LAN controller is capable of recognizing and storing the first 128 bytes
of a wake-up packet. If a wake-up packet is larger than 128 bytes, its tail is discarded by the
LAN controller. After the system is fully powered-up, software has the ability to determine the
cause of the wake-up event via the PMDR and dump the stored data to the host memory.
Magic Packets are an exception. The Magic Packets may cause a power management event
and set an indication bit in the PMDR; however, it is not stored by the LAN controller for use
by the system when it is woken up.
Functional Description
95
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