82567 Datasheet, PDF (15/33 Pages) Intel Corporation – GbE Physical Layer Transceiver (PHY)

Datasheet—82567
In addition, LAN_PHY_PWR_CTRL can also be used to turn the 3.3 V power off to the
82567 when the PHY is disabled. This will also turn the PHY off when in Sx state and
WOL is disabled from the OS (through driver settings) for systems that have ME
disabled. This capability is called PHY Power Down and can be enabled/disabled through
GbE NVM Word 0x13.9.
The figure below shows the power delivery for 82567 and ICH LAN along with the
recommended connection for LAN_PHY_PWR_CTRL to LAN_DISABLE_N pin of 82567.
Note:
Figure 2.
LAN_PHY_PWR_CTRL cannot be used to gate the 3.3V power rail to the ICH LAN.
Please refer to 82567 Specification Update for more information on
LAN_PHY_PWR_CTRL connection.
Recommended Platform Power Delivery for 82567.
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