Multi-mode dongle for peripheral devices and associated methods

• US 20110087805A1
• Filed: 10/09/2009
• Published: 04/14/2011
• Est. Priority Date: 10/09/2009
• Status: Active Grant

• Current Assignee: Dell Products LP (Dell Technologies Inc.)
• Original Assignee: Dell Products LP (Dell Technologies Inc.)
• Inventors: Hom, Bo, Lin, Hsien-Tsung, Liu, Chin-Jui
• Granted Patent: US 8,200,852 B2
• Time in Patent Office: Days
• US Class Current: 710/14
• CPC Class Codes: G06F 13/4081 Live connection to bus, e.g. hot-plugging current or voltage limitation during live insertion H02H9/004
• CPC Class Codes: G06F 2213/0042 Universal serial bus [USB]

Abstract

Methods and systems are described for utilizing multi-mode dongles with peripheral devices. The multi-mode dongles are configured to provide standard mode signals for a standard mode of operation and alternate mode signals for an alternate mode of operation, for example, where a host information handling system is unable to provide the alternate mode signals to the peripheral device. The multi-mode dongle receives mode control signals from a host information handling system and automatically switches from a standard mode of operation to an alternate mode of operation, where the alternate mode signals are provided to the peripheral device, based upon the mode control signals. In one embodiment, the multi-mode dongle can be configured for a universal serial bus (USB) port, and the alternate mode signals can be associated with charging a consumer electronics (CE) device.

Claims

1. A multi-mode dongle for a peripheral device, comprising:

a host connection port configured to be coupled to a communication port on a host information handling system;

a device connection port configured to be coupled to a peripheral device;

mode selection circuitry configured to receive mode control signals from the host information handling system through the host connection port and configured to output a mode selection signal;

alternate mode circuitry configured to generate alternate mode signals; and

multiplexer circuitry coupled to receive standard mode signals from the host connection port and the alternate mode signals from the alternate mode circuitry, the multiplexer circuitry being configured to couple either the standard mode signals or the alternate mode signals to the device connection port depending upon the mode selection signal.

2. The multi-mode dongle of claim 1, wherein the host connection port comprises a universal serial bus (USB) port and wherein the device connection port comprises a USB port.

3. The multi-mode dongle of claim 2, wherein the standard mode signals comprise USB signals, wherein the alternate mode signals comprise USB signals having direct current (DC) bias voltages, and wherein the USB signals having DC bias voltages are configured to cause the peripheral device to accept a charging voltage through the device connection.

4. The multi-mode dongle of claim 3, wherein the alternate mode circuitry comprises a resistor network configured to provide the DC bias voltages as outputs.

5. The multi-mode dongle of claim 4, wherein the resistor network circuitry comprises a first resistor divider coupled to provide a first DC bias voltage for a positive differential data line for the USB port and a second resistor divider coupled to provide a second DC bias voltage for a negative differential data line for the USB port.

6. The multi-mode dongle of claim 2, wherein the multiplexer is configured to provide bi-directional USB communications between the host connection port and the device connection port.

7. The multi-mode dongle of claim 2, wherein the mode control signals comprise pulses applied by the host information handling system to a voltage signal line for the USB port during mode configuration.

8. The multi-mode dongle of claim 7, wherein the mode selection circuitry comprises a serial-to-parallel integrated circuit (IC) having its clock input coupled to the voltage signal line for the USB port, wherein the serial-to-parallel IC is configured to shift a data input through a plurality of output pins based upon the pulses applied to the voltage signal line for the USB port, and wherein one of the output pins is coupled to provide the mode select signal to the multiplexer circuitry.

9. A system for utilizing a multi-mode dongle with a peripheral device, comprising:

a host information handling system having a communication port configured to be coupled to a peripheral device, the host information handling system comprising;

detection circuitry coupled to the communication port and configured to output one or more enable signals based upon detection of a connection to the communication port; and

mode control circuitry configured to apply mode control signals to the connection port in response to the one or more enable signals;

a multi-mode dongle configured to be coupled the host information handling system and to a peripheral device, the dongle comprising;

a host connection port configured to be coupled to the communication port for the host information handling system;

a device connection port configured to couple to a peripheral device;

mode selection circuitry configured to receive the mode control signals from the host information handling system through the host connection port and configured to output a mode selection signal;

alternate mode circuitry configured to generate alternate mode signals; and

multiplexer circuitry coupled to receive standard mode signals from the host connection port and the alternate mode signals from the alternate mode circuitry, the multiplexer circuitry being configured to couple either the standard mode signals or the alternate mode signals to the device connection port depending upon the mode selection signal.

10. The system of claim 9, wherein the host connection port comprises a universal serial bus (USB) port, and wherein the device connection port comprises a USB port.

11. The system of claim 10, wherein the detection circuitry is configured to output the one or more enable signals upon detection of a connection to the USB port when the host information handling systems is in an off power state.

12. The system of claim 11, wherein the standard mode signals comprise USB signals, wherein the alternate mode signals comprise USB signals having a direct current (DC) bias voltage, and wherein the USB signals having a direct current (DC) bias voltage are configured to cause the peripheral device to accept a charging voltage through the device connection.

13. The system of claim 12, wherein the mode control signals comprise pulses applied by the host information handling system to a voltage signal line for the USB port.

14. The system of claim 9, wherein the multiplexer is configured to provide bi-directional USB communications between the host connection port and the device connection port.

15. The system of claim 9, wherein the host information handling system is configured so as to be unable to provide the alternate mode signals to the communication port.

16. A method for utilizing a multi-mode dongle with a peripheral device, comprising:

connecting a dongle to a communication port for a host information handling system, the dongle being initially configured to provide standard mode signals from the communication port to a device connection for a peripheral device;

receiving mode control signals from the host information handling system, the mode control signals indicating an alternate mode of operation;

selecting within the dongle alternate mode signals; and

sending the alternate mode signals from the dongle to the device connection for the peripheral device.

17. The method of claim 16, further comprising sending the mode control signals from the host information handling system to the dongle only when the host information handling system detects a connection to the communication port when the host information handling system is in at least one selected power state.

18. The method of claim 17, wherein the at least one selected power state comprises an off power state.

19. The method of claim 18, wherein the communication port comprises a universal serial bus (USB) port.

20. The method of claim 19, communicating USB signals as the standard mode signals and communicating USB signals having a direct current (DC) bias voltage as the alternate mode signals.

21. The method of claim 20, further comprising causing the peripheral device to accept a charging voltage through the device connection by sending the USB signals having a direct current (DC) bias voltage to the device connection.

22. The method of claim 21, wherein the receiving step comprises receiving a plurality of pulses on a voltage signal line for the USB port as the mode control signals.