REDUCTION OF IDLE POWER IN A COMMUNICATION PORT

摘要

Techniques for reducing idle power consumption of a port are described herein. An example method includes determining device presence using a pull-down resistor disposed in a downstream port. The method also includes initiating a low power state of a link between the downstream port and an upstream device. The method also includes disabling the pull-down resistor in response to initiating the low power state.

主权项

1. An electronic device, comprising:
a downstream port comprising a physical layer to send and receive data to an upstream device via a link, the physical layer comprising:
a pull-down resistor to determine presence of the upstream device; anda switch coupled to the pull-down resistor, the switch to disable the pull-down resistor in response to the downstream port initiating a low power state of the link between the downstream port and the upstream device.