Low-power implementation of Type-C connector subsystem

摘要

Techniques for low-power implementation of a Universal Serial Bus (USB) Type-C connector subsystem are described herein. In an example embodiment, an integrated circuit (IC) chip device comprises a Universal Serial Bus (USB) Type-C subsystem. The Type-C subsystem is configured to operate an Ra termination circuit that consumes no more than 100 μA of current after the Ra termination circuit is applied to a Vconn line of the Type-C subsystem, and/or to operate one or more standby reference circuits in a deep-sleep state of the device to perform detection on a Configuration Channel (CC) line of the Type-C subsystem, where the device consumes no more than 100 μA of current in the deep-sleep state.

主权项

1. A device comprising:
a processor; and a Universal Serial Bus (USB) Type-C subsystem, wherein the Type-C subsystem is configured at least to:
operate an Ra termination circuit coupled to a Vconn line of the Type-C subsystem, wherein the Ra termination circuit consumes no more than 100 μA of current after being applied to the Vconn line; andoperate one or more standby reference circuits in a deep-sleep state of the device to perform detection on a Configuration Channel (CC) line of the Type-C subsystem, wherein the device consumes no more than 100 μA of current in the deep-sleep state; wherein to operate the Ra termination circuit, the Type-C subsystem is configured to:
maintain the Ra termination circuit “ON” while the Type-C subsystem is unpowered;detect when the Vconn line is powered; andenable a negative charge pump when the Vconn line reaches above a threshold voltage, in order to disable the Ra termination circuit; wherein the device is an integrated circuit (IC) chip.