The subject matter herein generally relates to communications.
Electronic devices can be configured to communicate with other devices. In some electronic devices an external communication interface can be included. Common external communication interfaces include a serial port such as Recommend Standard number 232 (RS-232) and universal serial bus (USB).
Implementations of the present technology will now be described, by way of example only, with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein.
Several definitions that apply throughout this disclosure will now be presented.
The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasably connected. The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series and the like.
The serial communication module 20 can comprise a control chipset 31, a serial interface 32, and two resistors R2 and R3. The serial interface 32 is configured to be electrically coupled to a serial interface of a second electronic device 60 (shown in
The control module 30 can comprise a resistor R1, a capacitor C1, and a field effect transistor (FET) Q1. The resistor R1 is electrically coupled to a ground through the capacitor C1, and is electrically coupled to the power supply pin PWR of the USB interface 11. A gate G of the FET Q1 is electrically coupled to a node between the resistor R1 and the capacitor C1. A drain D of the FET Q1 is electrically coupled to a power supply P3V3. A source S of the FET Q1 is electrically coupled to the power supply pin VCC of the data conversion chipset 12, and is electrically coupled to the enable pin EN of the control chipset 31 through the resistor R2.
In at least one embodiment, the first electronic device and the second electronic device can each be a notebook.
In use, the USB interface 11 of the communication switch device 100 is electrically coupled to the USB interface of the first electronic device 40. The USB interface of the electronic device 40 outputs a power supply P5V USB to the control module 30 through the power supply pin PWR of the USB interface 11. Thus, the FET Q1 is turned on. The control module 30 outputs a first control signal at a high-voltage level, such as logic 1, to the enable pin EN of the control chipset 31, to turn off the control chipset 31. In the meantime, the processor 50 can communicate with the USB interface of the first electronic device 40 through the USB communication module 10.
When the serial interface 32 of the communication switch device 100 is electrically coupled to the serial interface of the second electronic device 60, the FET Q1 is turned off. Thus, the control module 30 outputs a second control signal at a low-voltage level, such as logic 0, to the enable pin EN of the control chipset 31, to turn on the control chipset 31. In the meantime, the processor 50 can communicate with the serial interface of the second electronic device 60 through the serial communication module 20.
The embodiments shown and described above are only examples. Many details are often found in the art such as the other features of the communication switch device. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, especially in matters of shape, size, and arrangement of the parts within the principles of the present disclosure, up to and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above may be modified within the scope of the claims.
Number | Date | Country | Kind |
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2015 1 0235267 | May 2015 | CN | national |
Number | Name | Date | Kind |
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20040143693 | Hwang | Jul 2004 | A1 |
Number | Date | Country |
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203104527 | Jul 2013 | CN |
204069101 | Dec 2014 | CN |
204229835 | Mar 2015 | CN |
Number | Date | Country | |
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20160335212 A1 | Nov 2016 | US |