FW82801EB Intel, FW82801EB Datasheet - Page 96
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FW82801EB
Manufacturer Part Number
FW82801EB
Description
Manufacturer
Intel
Datasheet
1.FW82801EB.pdf
(671 pages)
Specifications of FW82801EB
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Functional Description
5.2.2.6
5.2.3
96
Figure 9. 64-Word EEPROM Read Instruction Waveform
Wake on LAN* (Preboot Wake-Up)
The LAN controller enters Wake on LAN mode after reset if the Wake on LAN bit in the EEPROM
is set. At this point, the LAN controller is in the D0u state. When the LAN controller is in Wake on
LAN mode:
The LAN controller switches from Wake on LAN mode to the D0a power state following a setup of
the Memory or I/O Base Address Registers in the PCI Configuration space.
Serial EEPROM Interface
The serial EEPROM stores configuration data for the ICH5 integrated LAN controller and is a
serial in/serial out device. The LAN controller supports a 64-register or 256-register size EEPROM
and automatically detects the EEPROM’s size. The EEPROM should operate at a frequency of at
least 1 MHz.
All accesses, either read or write, are preceded by a command instruction to the device. The
address field is six bits for a 64-register EEPROM or eight bits for a 256-register EEPROM. The
end of the address field is indicated by a dummy 0 bit from the EEPROM, which indicates the
entire address field has been transferred to the device. An EEPROM read instruction waveform is
shown in
The LAN controller performs an automatic read of seven words (0h, 1h, 2h, Ah, Bh, Ch, and Dh)
of the EEPROM after the deassertion of Reset.
•
•
•
The LAN controller scans incoming packets for a Magic Packet and asserts the PME# signal
for 52 ms when a 1 is detected in Wake on LAN mode.
The Activity LED changes its functionality to indicates that the received frame passed
Individual Address (IA) filtering or broadcast filtering.
The PCI Configuration registers are accessible to the host.
EE_DOUT
EE_SHCLKK
EE_CS
EE_DIN
Figure
9.
READ OP code
A
5
A
4
A
3
Intel
A
®
2
82801EB ICH5 / 82801ER ICH5R Datasheet
A
A
A
1
1
0
A
0
D
15
D
0
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