Providing wakeup logic to awaken an electronic device from a lower power mode

摘要

An electronic device (100) includes a network interface controller (102) and an input/output controller (110, 202) having a link layer. A portion of the input/output controller is configured to be powered off during a lower power mode of the electronic device, where the first portion contains the link layer. Wakeup logic (108) separate from the input/output controller receives a wake indication from the network interface controller in response to the physical layer receiving a wake message on the network while the electronic device is in the lower power mode. The wakeup logic activates an indication to awaken the electronic device from the lower power mode in response to the wake indication from the network interface controller.

主权项

1. An electronic device comprising:
a network interface controller having a physical layer; an input/output controller having a link layer to cooperate with the physical layer to communicate data over a network, wherein a first portion of the input/output controller is configured to be powered off during a lower power mode of the electronic device, the first portion containing the link layer; and wakeup logic separate from the input/output controller to receive a wake indication from the network interface controller, wherein the network interface controller is to provide the wake indication in response to the physical layer receiving a wake message on the network while the electronic device is in the lower power mode, a system management bus (SMBus) coupled to the network interface controller, the wakeup logic and the input/output controller, wherein the wake indication is to be provided by the network interface controller over the SMBus to the wakeup logic and wherein an interface of the input/output controller to the SMBus is powered off in the lower power mode; wherein the wakeup logic is to activate an indication to awaken the electronic device from the lower power mode in response to the wake indication.