Device for switching between communication modes

Patent metadata

Field	Value
Publication number	US-9804986-B2
Application number	US-201514788149-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	May 11, 2015
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A switching device able to switch between communication modes includes a processor, a universal serial bus (USB) communication module, a serial communication module, and a control module. When a USB interface of the USB communication module is electrically coupled to a first electronic device, the control module outputs a first control signal to a control chipset of the serial communication module. The control chipset of the serial communication module is turned off. The processor can communicate with the first electronic device through the USB communication module.

First claim

What is claimed is:

1. A communication switch device comprising:
a processor;
a universal serial bus (USB) communication module comprising:
a data conversion chipset electrically coupled to the processor; and
a USB interface electrically coupled to the data conversion chipset and configured to be electrically coupled to a first electronic device, wherein the data conversion chipset is configured for transmitting data between the processor and the first electronic device through the USB interface;

a serial communication module comprising:
a control chipset electrically coupled to the processor; and
a serial interface electrically coupled to the control chipset and configured to be electrically coupled to a second electronic device, wherein the control chipset is configured for transmitting data between the processor and the second electronic device through the serial interface; and

a control module electrically coupled to the USB communication module and the serial communication module, wherein the control module comprises a field effect transistor (FET), a capacitor, and a first resistor, the first resistor is electrically coupled to ground through the capacitor, and is electrically coupled to a power supply pin of the USB interface, a gate of the FET is electrically coupled to a node between the first resistor and the capacitor, a drain of the FET is electrically coupled to a first power supply, a source of the FET is electrically coupled to a power supply pin of the data conversion chipset, and is electrically coupled to serial communication module;
wherein when the USB interface is electrically coupled to the first electronic device, the control module outputs a first control signal to the control chipset of the serial communication module, the control chipset of the serial communication module is turned off, and the processor communicates with the first electronic device through the data conversion chipset and the USB interface.

2. The communication switch device of claim 1 , wherein when the serial interface is electrically coupled to the second electronic device, the control module outputs a second control signal to the control chipset of the serial communication module, the control chipset of the serial communication module is turned on, the processor communicates with the second electronic device through the control chipset and the serial interface.

3. The communication switch device claim 2 ,
wherein when the USB interface is electrically coupled to the first electronic device, the power supply pin of the USB interface supplies power to the gate of the FET through the first resistor, the FET is turned on, the control module outputs the first control signal to the control chipset of the serial communication module, the control chipset of the serial communication module is turned off, the processor communicates with the first electronic device through the USB interface of the USB communication module.

4. The communication switch device of claim 3 , wherein an enable pin of the control chipset is electrically coupled to ground through a second resistor, and is electrically coupled to the source of the FET through a third resistor, a first transmission data pin of the control chipset is electrically coupled to a transmission data pin of the serial interface, a first receiving data pin of the control chipset is electrically coupled to a receiving data pin of the serial interface.

5. The communication switch device of claim 4 , wherein a first transmission data pin of the data conversion chipset is electrically coupled to a first data pin of the USB interface of the USB communication module, a first receiving data pin of the data conversion chipset is electrically coupled to a second data pin of the USB interface of the USB communication module, a ground pin of the USB interface of the USB communication module is electrically coupled to ground.

6. The communication switch device of claim 5 , wherein both a second transmission data pin of the control chipset and a second send data pin of the data conversion chipset are electrically coupled to a first transmission pin of the processor, both a second receiving data pin of the control chipset and a second receiving data pin of the data conversion chipset are electrically coupled to a first receiving pin of the processor.

Assignees

• Hong Fu Jin Prec Ind (Shenzhen) Co Ltd
• Hon Hai Prec Ind Co Ltd

Inventors

• Gao Yang
• Yang Meng-Liang

Classifications

• G06F13/387

  for adaptation of different data processing systems to different peripheral devices, e.g. protocol converters for incompatible systems, open system · CPC title

• G06F3/0661

  Format or protocol conversion arrangements · CPC title

• G06F13/4068

  Electrical coupling · CPC title

• G06F13/4022 Primary

  using switching circuits, e.g. switching matrix, connection or expansion network (G06F13/4009 takes precedence) · CPC title

• G06F13/4282

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