WG82577LM S LGWR Intel, WG82577LM S LGWR Datasheet - Page 36

• Manufacturer Part Number: WG82577LM S LGWR
• Manufacturer: Intel

Specifications of WG82577LM S LGWR

• Lead Free Status / Rohs Status: Supplier Unconfirmed

6.4
6.4.1
Note:
Note:
6.4.2
29
Power Saving Features
This section provides information about the low power configurations for the 82577.
Intel
Intel
automatically reduces the PHY to a lower power state when the power cable is
disconnected. When the power cable is reconnected, it renegotiates the line speed
following IEEE specifications for auto negotiation. By default, auto negotiation starts at
1 Gb/s, then 100 Mb/s full duplex/half duplex, then 10 Mb/s full duplex/half duplex.
ACBS is only supported during auto negotiation. If link is forced, the 82577 does not
enter ACBS mode.
82577 ACBS works in both S0 and Sx states. Since 82577 ACBS has no driver control,
the feature is always enabled, allowing power savings by default.
The crystal clock drivers are intermittently disabled when the network cable is
unplugged and the 82577 is in ACBS mode.
Automatic Link Downshift
Automatic link downshift is a collection of power saving features that enable a link
downshift from 1000 Mb/s to a lower speed to save power under different conditions
like the AC cable plugged in, monitor idle, or entering Sx states.
®
®
Auto Connect Battery Saver for the 82577 is a hardware-only feature that
Auto Connect Battery Saver (ACBS)
82577 GbE PHY—Power Management and Delivery