Serial bus electrical termination control

Patent metadata

Field	Value
Publication number	US-10204068-B2
Application number	US-201815901351-A
Country	US
Kind code	B2
Filing date	Feb 21, 2018
Priority date	Sep 26, 2014
Publication date	Feb 12, 2019
Grant date	Feb 12, 2019

Abstract

Some embodiments include apparatuses and methods having a node to couple to a serial bus, and a controller to provide a control signal to one of a first circuit path and a second circuit path in order to change electrical termination of a signal at the node between a first electrical termination through the first circuit path during a first mode of the controller and a second electrical termination through the second circuit path during a second mode of the controller. The controller can be arranged to provide the control signal to the first and second circuit paths during the first and second modes without providing another control signal from the controller to the first and second circuit paths during the first and second modes.

First claim

What is claimed is:

1. An apparatus comprising:
a node to couple to a Configuration Channel pin of a Universal Serial Bus (USB) type-C connection;
a first supply node;
a second supply node;
a first circuit path coupled to the node and the first supply node;
a second circuit path coupled to the node and the second supply node; and
a controller to provide a control signal to allow the first node to be electrically coupled to the first supply node during a USB host mode of the controller, and the controller to provide the control signal to allow the first node to be electrically coupled to the second supply node during a USB device mode of the controller, wherein the first circuit path includes a switch coupled between the node and the first supply node, the second circuit path includes a diode coupled between the node and the second supply node, the diode includes an anode and a cathode, the anode is coupled to a terminal of the switch through a portion of the first circuit path, and the cathode is coupled to the terminal of the switch through a circuit path between the terminal of the switch and the cathode.

2. The apparatus of claim 1 , wherein the Configuration Channel pin includes a Configuration Channel CC 1 pin of the USB type-C connection.

3. The apparatus of claim 1 , wherein the Configuration Channel pin includes a Configuration Channel CC 2 pin of the USB type-C connection.

4. An apparatus comprising:
a node to couple to a Configuration Channel pin of a Universal Serial Bus (USB) type-C connection;
a first supply node;
a second supply node;
a first circuit path coupled to the node and the first supply node;
a second circuit path coupled to the node and the second supply node;
a switch included in the first circuit path, the switch being coupled between the node and the first supply node; and
a diode included in the second circuit path, the diode being coupled between the node and the second supply node, wherein the diode includes an anode and a cathode, the anode is coupled to a terminal of the switch through a portion of the first circuit path, and the cathode is coupled to the terminal of the switch through a circuit path between the terminal of the switch and the cathode.

5. The apparatus of claim 4 , wherein the Configuration Channel pin includes a Configuration Channel CC 1 pin of the USB type-C connection.

6. The apparatus of claim 4 , wherein the Configuration Channel pin includes a Configuration Channel CC 2 pin of the USB type-C connection.

7. The apparatus of claim 4 , wherein the circuit path between the terminal of the switch and the cathode includes a resistor, the resistor includes a first terminal coupled to the terminal of the switch, and the resistor includes a second terminal coupled to the cathode of the diode.

8. An apparatus comprising:
a node to couple to a Configuration Channel pin of a Universal Serial Bus (USB) type-C connection;
a first supply node;
a second supply node;
a first circuit path coupled to the node and the first supply node;
a second circuit path coupled to the node and the second supply node;
a switch included in the first circuit path, the switch being coupled between the node and the first supply node; and
a diode included in the second circuit path, the diode being coupled between the node and the second supply node, wherein the first circuit path includes an additional diode coupled between the switch and the node.

9. The apparatus of claim 8 , further comprising a USB controller to turn on the switch during a USB host mode of the USB controller.

10. The apparatus of claim 9 , further comprising a USB controller o turn off the switch during a USB device mode of the USB controller.

11. An apparatus comprising:
a node to couple to a Configuration Channel pin of a Universal Serial Bus (USB) type-C connection;
a first supply node;
a second supply node;
a first circuit path coupled to the node and the first supply node;
a second circuit path coupled to the node and the second supply node:
a switch included in the first circuit path, the switch being coupled between the node and the first supply node; and
a diode included in the second circuit path the diode being coupled between the node and the second supply node, wherein the first circuit path includes an additional diode coupled between the node and the first supply node.

12. The apparatus of claim 11 , wherein the switch includes a transistor, and the transistor and the additional diode are coupled between the node and the first supply node.

13. An apparatus comprising:
a node to couple to a Configuration Channel pin of a Universal Serial Bus (USB) type-C connection;
a first supply node;
a second supply node;
a first circuit path coupled to the node and the first supply node;
a second circuit path coupled to the node and the second supply node;
a switch included in the first circuit path, the switch being coupled between the node and the first supply node;
a diode included in the second circuit path, the diode being coupled between the node and the second supply node, wherein the diode includes an anode and a cathode, the anode is coupled to a terminal of the switch through a portion of the first circuit path, and the cathode is coupled to the terminal of the switch through a circuit path between the terminal of the switch and the cathode;
a USB controller to turn on the switch during a first mode of the USB controller and to turn off the switch during a second mode of the USB controller;
a processor coupled to the USB controller; and
an antenna coupled to the processor.

14. The apparatus of claim 13 , wherein the first mode includes a USB host mode.

15. The apparatus of claim 14 , wherein the second mode includes a USB device mode.

16. The apparatus of claim 13 , further comprising a circuit board, wherein the USB controller is located on the circuit board, and the switch is located on the circuit board and outside the USB controller.

17. The apparatus of claim 13 , further comprising a circuit board, wherein the USB controller is located on the circuit board, and the diode is located on the circuit board and outside the USB controller.

Assignees

• Intel Corp

Inventors

• Nge Chee Lim
• Schiff Tod
• Dibbad Vijayakumar
• Hallberg Alan

Classifications

• G06F13/385 Primary

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

• G06F13/4282

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

• G06F13/4068

  Electrical coupling · CPC title

• G06F13/382

  using universal interface adapter · CPC title