CN205959193U - USB timesharing multiplex circuit based on USB change over switch - Google Patents
USB timesharing multiplex circuit based on USB change over switch Download PDFInfo
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- CN205959193U CN205959193U CN201620725146.7U CN201620725146U CN205959193U CN 205959193 U CN205959193 U CN 205959193U CN 201620725146 U CN201620725146 U CN 201620725146U CN 205959193 U CN205959193 U CN 205959193U
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- usb
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- vehicle
- change over
- switching switch
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Abstract
The utility model discloses a USB timesharing multiplex circuit based on USB change over switch contains USB change over switch, a plurality of USB interface, power switch, its characterized in that: USB change over switch one end links to each other with on -vehicle USB read device and the on -vehicle general I/O GPIO of MCU who upward installs who goes up the installation respectively, and the USB change over switch other end links to each other with a plurality of USB interface respectively, and power switch one end links to each other with on -vehicle power, and the power switch other end is continuous with the feeder ear of a plurality of USB interface respectively. The utility model discloses can realize that the USB interface timesharing is multiplexing, the USB port that does not use can be used for charging for electronic equipment such as cell -phones, under the prerequisite that does not increase circuit complexity and cost, has solved the not enough problem of USB port, but wide application in on -vehicle information infotainment system.
Description
Technical field
The utility model is related to automotive electronic information system field, more particularly to a kind of USB based on USB switching switch
Time-sharing multiplex circuit.
Background technology
Existing inter-vehicle information system needs to provide multiple USB interfaces, and band core wooden handcart machine can be realized using USB HUB,
But cost and design complexity can be increased, the vehicle mounted MP 3 without core board is drawn USB in the form of MP3 decoding chip and connect
Mouthful, do not support USB HUB, it is impossible to provide the USB charging inlet of the electronic equipments such as mobile phone after independent USB port is occupied.
Utility model content
The purpose of this utility model is to overcome the shortcomings of above-mentioned background technology, providing a kind of switching based on USB to switch
USB time-sharing multiplex circuit, the utility model has the characteristics that design is simple, cost is relatively low, reliability is high, is easily achieved.
A kind of USB time-sharing multiplex circuit based on USB switching switch, comprises USB switching switch, several USB interfaces, work(
Rate switch it is characterised in that：USB switching switch one end reads equipment and vehicle-mounted upper installation respectively with the USB of vehicle-mounted upper installation
MCU universal input/output GPIO is connected, and the USB switching switch other end is connected with several USB interfaces respectively, power switch one
End is connected with vehicle-mounted power supply, and the power switch other end is connected with the feeder ear of several USB interfaces respectively.
Described power switch model is SY6288, and cut-off current is the model of 2A, can be that mobile phone etc. needs to charge
Equipment provides larger current.The response of SY6288 short-circuit protection is fast, and pressure drop is low, and price is low, is better than traditional recovered guarantor on the whole
Dangerous silk.
Described USB switching switch model CLCUSB30, is USB DPDT analog switch, USB interface used is
Two, by being connected to MCU universal input/output GPIO pin low and high level, you can select the USB interface of connection.USB interface connects
Afterwards, you can read the content in USB device.The control of USB switching switch does not affect the power supply of another USB interface, in a USB
In the case that interface connects USB storage device, another USB interface still can provide burning voltage electric current, to electricity such as mobile phones
Sub- equipment charge.
USB reads equipment acquiescence and reads the USB device connecting on one of USB interface, can be by controlling MCU's
GPIO pin, selects to be communicated to the USB interface that USB reads equipment.
What all USB interface feeder ears connected is power switch, can power for all USB interfaces simultaneously.
The utility model reliability height, low cost, the feature being easily achieved, can be widely applied to automobile electronic information system
Commander domain.
Brief description
Fig. 1 is structural representation of the present utility model.
Specific embodiment
In conjunction with accompanying drawing, the utility model will be further described.
As shown in figure 1, the utility model comprise USB switching switch, two USB interfaces, power switch it is characterised in that：
MCU universal input/the output of equipment and vehicle-mounted upper installation is read with the USB of vehicle-mounted upper installation respectively in USB switching switch one end
GPIO is connected, and the USB switching switch other end is connected with two USB interfaces respectively, and power switch one end is connected with vehicle-mounted power supply,
The power switch other end is connected with the feeder ear of two USB interfaces respectively.
Described power switch model is SY6288, from the model for 2A for the cut-off current, can be that mobile phone etc. needs to fill
Electric equipment provides larger current.The response of SY6288 short-circuit protection is fast, and pressure drop is low, and price is low, is better than traditional recovering on the whole
Fuse.Described USB switching switch model CLCUSB30, is USB DPDT analog switch, USB interface used is
Two, usb 1 and USB interface 2, by being connected to MCU universal input/output GPIO pin low and high level, you can selects connection
USB interface.After USB interface connection, you can read the content in USB device.The control of USB switching switch does not affect another USB
The power supply of interface, in the case that a USB interface connects USB storage device, another USB interface still can provide stable
Voltage x current, charges to electronic equipments such as mobile phones.
USB reads equipment acquiescence and reads the USB device connecting on a usb 1, can be by controlling the GPIO of MCU
Pin, selects to be communicated to the USB interface that USB reads equipment.
Two USB interface feeder ear connections are power switch, can power for two USB interfaces simultaneously.This practicality is new
Type can realize USB interface time-sharing multiplex, and the USB port not used can be used to charge to electronic equipments such as mobile phones, is not increasing
Plus on the premise of circuit complexity and cost, solve the problems, such as that USB port is not enough, can be widely applied to on-vehicle information amusement system
System.
Those skilled in the art can carry out various changes and modification without deviating from the utility model to the utility model
Spirit and scope.So, if these modifications of the present utility model and modification belong to the utility model claim and its wait
Within the scope of technology, then the utility model is also intended to comprise these changes and modification.
The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (3)
1. a kind of USB time-sharing multiplex circuit based on USB switching switch, comprises USB switching switch, several USB interfaces, power
Switch it is characterised in that：The MCU of equipment and vehicle-mounted upper installation is read with the USB of vehicle-mounted upper installation respectively in USB switching switch one end
Universal input/output GPIO be connected, USB switching switch the other end be connected with several USB interfaces respectively, power switch one end and
Vehicle-mounted power supply is connected, and the power switch other end is connected with the feeder ear of several USB interfaces respectively.
2. according to claim 1 based on USB switching switch USB time-sharing multiplex circuit it is characterised in that：Described work(
Rate switchs model SY6288, and cut-off current is 2A.
3. according to claim 1 based on USB switching switch USB time-sharing multiplex circuit it is characterised in that：Described
USB switching switch model USB DPDT analog switch, USB interface used is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620725146.7U CN205959193U (en) | 2016-07-11 | 2016-07-11 | USB timesharing multiplex circuit based on USB change over switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620725146.7U CN205959193U (en) | 2016-07-11 | 2016-07-11 | USB timesharing multiplex circuit based on USB change over switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205959193U true CN205959193U (en) | 2017-02-15 |
Family
ID=57970367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620725146.7U Active CN205959193U (en) | 2016-07-11 | 2016-07-11 | USB timesharing multiplex circuit based on USB change over switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205959193U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108491342A (en) * | 2018-02-08 | 2018-09-04 | 青岛海信移动通信技术股份有限公司 | A kind of method and terminal carrying out access switching |
-
2016
- 2016-07-11 CN CN201620725146.7U patent/CN205959193U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108491342A (en) * | 2018-02-08 | 2018-09-04 | 青岛海信移动通信技术股份有限公司 | A kind of method and terminal carrying out access switching |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200423 Address after: 430000 2 / F, plant 2, environmental protection and new energy industrial base, No. 26, fozuling Third Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: Wuhan Bluestar general intelligent equipment Co., Ltd Address before: 430205 Hubei East Lake Development Zone, Wuhan two industrial park, Huanglong Shanxi Road, Wuhan LAN-STAR science and technology production base Patentee before: WUHAN BLUESTAR TECHNOLOGY Co.,Ltd. |