Electronic device having USB Type-C interface, control method, and readable storage

Patent metadata

Field	Value
Publication number	US-11036670-B2
Application number	US-201716759968-A
Country	US
Kind code	B2
Filing date	Oct 31, 2017
Priority date	Oct 31, 2017
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A electronic device includes a USB Type-C interface, a switching circuit, a first signal path, and a second signal path. The USB Type-C interface is configured to connect to a USB Type-C device. The switching circuit is connected to the USB Type-C interface, the first signal path, and the second signal path. When the USB Type-C interface is connected to the USB Type-C device, the first signal path is connected to the USB Type-C interface through the switching circuit, and a level of a first pin of the USB Type-C interface is a first level. When the USB Type-C interface is disconnected from the USB Type-C device, the second signal path is connected to the USB Type-C interface through the switching circuit, and a level of the first pin is a second level. The first level is greater than the second level.

First claim

What is claimed is:

1. A device, comprising:
a USB Type-C interface configured to connect to a USB Type-C device;
a switching circuit connected to the USB Type-C interface, a first signal path, and a second signal path;
wherein when the USB Type-C interface is connected to the USB Type-C device, the first signal path is connected to the USB Type-C interface through the switching circuit, the second signal path is disconnected from the USB Type-C interface, and a level of a first pin of the USB Type-C interface is a first level;
wherein when the USB Type-C interface is disconnected from the USB Type-C device, the second signal path is connected to the USB Type-C interface through the switching circuit, the first signal path is disconnected from the USB Type-C interface, and a level of the first pin of the USB Type-C interface is a second level; and
wherein the first level is greater than the second level.

2. The device of claim 1 , wherein the first pin of the USB Type-C interface is a CC pin.

3. The device of claim 1 , wherein:
the first signal path comprises a PD circuit;
the second signal path comprises a power supply circuit, a detection circuit, and a first resistor;
the power supply circuit is configured to output a first power, the power supply circuit is connected to a third pin of the switching circuit through the first resistor, and a level of the first power is less than a level of a signal output by the PD circuit; and
the detection circuit is configured to detect a level of the third pin of the switching circuit, and when the level of the third pin meets a first preset condition, determine that the USB Type-C interface is connected to the USB Type-C device and send a first signal to the switching circuit, wherein the first signal instructs connecting the first signal path with the USB Type-C interface.

4. The device of claim 3 , wherein:
the PD circuit is configured to detect a level of a second pin of the switching circuit; and
in response to the level of the second pin meeting a second preset condition, determine that the USB Type-C interface is disconnected from the USB Type-C device and send a second signal to the switching circuit, wherein the second signal instructs connecting the second signal path with the USB Type-C interface.

5. The device of claim 3 , wherein:
the device further comprises a controller, the controller is connected to the detection circuit and the switching circuit;
the detection circuit is further configured to send a first signal to the controller when the level of the third pin of the switching circuit meets the first preset condition; and
the controller instructs, according to the first signal, the switching circuit to connect the first signal path to the USB Type-C interface.

6. The device of claim 3 , wherein the device further comprises:
a controller, the controller is connected to the detection circuit and the switching circuit;
the detection circuit sends the level of the third pin of the switching circuit to the controller; and
the controller instructs, according to the level of the third pin of the switching circuit, the switching circuit to connect the first signal path to the USB Type-C interface.

7. The device of claim 4 , wherein:
the device further comprises a controller, the controller is connected to the PD circuit and the switching circuit; and
the controller instructs, according to the second signal, the switching circuit to connect the second signal path to the USB Type-C interface.

8. The device of claim 3 , wherein the detection circuit is an analog-to-digital converter (ADC) detection circuit.

9. A method comprising:
connecting a first signal path to a USB Type-C interface through a switching circuit when the USB Type-C interface is connected with a USB Type-C device, the switching circuit is connected to the USB Type-C interface, the first signal path, and a second signal path;
disconnecting the second signal path from the USB Type-C interface when the USB Type-C interface is connected with the USB Type-C device, wherein a level of a first pin of the USB Type-C interface is a first level when the USB Type-C interface is connected with the USB Type-C device;
connecting the second signal path to the USB Type-C interface through the switching circuit when the USB Type-C interface is disconnected with the USB Type-C device; and
disconnecting the first signal path from the USB Type-C interface when the USB Type-C interface is disconnected with the USB Type-C device, wherein a level of the first pin of the USB Type-C interface is a second level when the USB Type-C interface disconnected with the USB Type-C device, wherein the first level is greater than the second level.

10. The method of claim 9 , wherein the first pin of the USB Type-C interface is a CC pin.

11. The method of claim 9 , wherein the first signal path comprises a PD circuit, and wherein the method further comprises:
detecting, by the PD circuit, that a level of a second pin of the switching circuit meets a second preset condition;
determining, by the PD circuit, that the USB Type-C interface is disconnected from the USB Type-C device;
controlling the switching circuit to disconnect the first signal path from the USB Type-C interface; and
controlling the switching circuit to connect the second signal path to the USB Type-C interface.

12. The method of claim 9 , wherein the second signal path comprises a power supply circuit, a detection circuit, and a first resistor, and wherein the method further comprises:
detecting, by the detection circuit, that a level of a third pin of the switching circuit meets a first preset condition;
determining, by the detection circuit, that the USB Type-C interface is connected to the USB Type-C device according to the level of the third pin of the switching circuit meeting the first preset condition;
controlling the switching circuit to disconnect the second signal path from the USB Type-C interface, and
controlling the switching circuit to connect the first signal path to the USB Type-C interface.

13. The method of claim 11 , wherein the device comprises a controller, and wherein the method further comprises:
detecting, by the PD circuit, that the level of the second pin of the switching circuit meets the second preset condition;
determining, by the PD circuit, that the USB Type-C interface is disconnected from the USB Type-C device according to the level of the second pin of the switching circuit meeting the second preset condition;
controlling, by the controller, according to an instruction from the PD circuit, the switching circuit to disconnect the first signal path from the USB Type-C interface; and
controlling, by the controller, according to an instruction from the PD circuit, the switching circuit to connect the second signal path to the USB Type-C interface.

14. The method of claim 12 , wherein the device comprises a controller, and wherein the method further comprises:
detecting, by the detection circuit, that the level of the third pin of the switching circuit meets the first preset condition;
determining, by the detection circuit, that the USB Type-C interface is connected to the USB Type-C device;
controlling, by the controller, according to an instruction from the detection circuit, the switching circuit to disconnect the second signal path from the USB Type-C interface; and
controlling, by the controller, according to an instruction from the detection circuit, the switching circuit to connect the first signal path to the USB Type-C interface.

15. A non-transitory computer-readable medium havin

Assignees

• Huawei Tech Co Ltd
• Huawei Technolgies Co Ltd

Inventors

• Li Junjie
• Cong Le
• Zhao Hongjun
• Dai Xuan

Classifications

• G06F1/28

  Supervision thereof, e.g. detecting power-supply failure by out of limits supervision · CPC title

• G06F1/26

  Power supply means, e.g. regulation thereof (for memories G11C) · CPC title

• G06F13/4282 Primary

  on a serial bus, e.g. I2C bus, SPI bus (on daisy chain buses G06F13/4247) · CPC title

• G06F2213/0042

  Universal serial bus [USB] · CPC title

• G06F13/385 Primary

  for adaptation of a particular data processing system to different peripheral devices · CPC title