600 Series Chipset Family Platform Controller Hub

Datasheet, Volume 1 of 2

ID 648364
Date 05/10/2022
Document Table of Contents

PCI Power Management

The integrated GbE controller supports the Advanced Configuration and Power Interface (ACPI) specification as well as Advanced Power Management (APM). This enables the network-related activity (using an internal host wake signal) to wake up the host. For example, from Sx (S3–S5) and Deep Sx to S0.

Note:The Intel® Ethernet Connection I219 must be powered during the Deep Sx state in order to support host wake up from Deep Sx. GPD_​2_​LAN_​WAKE# on the PCH must be configured to support wake from Deep Sx and must be connected to LANWAKE_​N on the Platform LAN Connect Device. The SLP_​LAN# signal must be driven high (de-asserted) in the Deep Sx state to maintain power to the Platform LAN Connect Device.

The integrated GbE controller contains power management registers for PCI and supports D0 and D3 states. PCIe transactions are only allowed in the D0 state, except for host accesses to the integrated GbE controller’s PCI configuration registers.

Note:Refer to SLP_​LAN# Pin Behavior.

The PCH controls the voltage rails into the external LAN PHY using the SLP_​LAN# pin.

  • The LAN PHY is always powered when the Host and Intel® CSME systems are running.
    • SLP_​LAN#=’1’ whenever SLP_​S3#=’1’ or SLP_​A#=’1’.
  • If the LAN PHY is required by Intel® CSME in Sx/M-Off or Deep Sx, Intel® CSME must configure SLP_​LAN#=’1’ irrespective of the power source and the destination power state. Intel® CSME must be powered at least once after G3 to configure this.
  • If the LAN PHY is required after a G3 transition, the host BIOS must set AG3_​PP_​EN.
  • If the LAN PHY is required in Sx/M-Off, the host BIOS must set SX_​PP_​EN.
  • If the LAN PHY is required in Deep Sx, the host BIOS must keep DSX_​PP_​DIS cleared.
  • If the LAN PHY is not required if the source of power is battery, the host BIOS must set DC_​PP_​DIS.
Note:Intel® CSME configuration of SLP_​LAN# in Sx/M-Off and Deep Sx is dependent on Intel® CSME power policy configuration.

The flow chart below shows how a decision is made to drive SLP_​LAN# every time its policy needs to be evaluated.

Conceptual Diagram of SLP_​LAN#