CN203746075U - Electronic equipment and function switching circuit - Google Patents
Electronic equipment and function switching circuit Download PDFInfo
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- CN203746075U CN203746075U CN201420053987.9U CN201420053987U CN203746075U CN 203746075 U CN203746075 U CN 203746075U CN 201420053987 U CN201420053987 U CN 201420053987U CN 203746075 U CN203746075 U CN 203746075U
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Abstract
The utility model belongs to the field of electronic equipment, and provides electronic equipment and a function switching circuit. According to the electronic equipment and the function switching circuit, a microprocessor chip controls a USB switching circuit to be connected or disconnected according to a function switching control signal sent by a function switching keying circuit, and further controls data communication connection between the electronic equipment and an external terminal, the mutual interference problem caused by USB data channel occupation when a user operates the external terminal or the electronic equipment is solved, and meanwhile the security of the user for operating the electronic equipment is improved.
Description
Technical field
The utility model belongs to electronic device field, relates in particular to a kind of electronic equipment and function commutation circuit.
Background technology
USB(Universal Serial Bus: USB (universal serial bus)) in present electronic equipment, be more and more widely used, electronic equipment is provided with USB interface can be connected with calculating communication, can also utilize the USB interface of exterior terminal to charge to electronic equipment.
But, along with scientific and technological development, present electronic device design obtains more and more exquisite, function is more and more, in multi-functional some problems that exist that meet people's expectation simultaneously, when traditional electronic equipment is connected with exterior terminal, after exterior terminal system identification, just acquiescence is carried out USB associative operation, in the time that user's operating electronic equipment is realized with the function of irrelevant other of usb communication, because exterior terminal has now taken the usb data passage of electronic equipment, easily electronic equipment is caused in the time carrying out other operations interference, and in the time carrying out concerning security matters operation, may obtain the concerning security matters content of this exterior terminal in communicating by letter with electronic equipment with other equipment of exterior terminal networking, to concerning security matters, operation brings potential safety hazard.
Utility model content
The utility model provides a kind of electronic equipment, after being intended to solve existing electronic equipment and being connected with exterior terminal by USB interface, user is carried out on electronic equipment to other functions and causes and disturb and the problem of security because usb data passage takies.
In order to solve the problems of the technologies described above, the utility model is achieved in that a kind of electronic functionalities commutation circuit, comprises the USB interface being connected with exterior terminal, and described electronic functionalities commutation circuit also comprises:
Function switching key circuit, USB on-off circuit and microprocessor chip;
The output terminal of described function switching key circuit is connected with the corresponding pin of described microprocessor chip respectively with the first end of described USB on-off circuit;
The second end of described USB on-off circuit is connected with the data pin of the first end of described USB interface, and the power pins of the first end of described USB interface is connected with the power end of described microprocessor chip, and the second end of described USB interface is connected with described exterior terminal.
Further, described electronic functionalities commutation circuit also comprises the display screen or the current function indicating circuit that are connected with described microprocessor chip.
Further, described current function indicating circuit comprises voice broadcast module and/or indicating lamp module.
Further, described function switching key circuit is physical button circuit or virtual key circuit or physical button and virtual key Macintosh control circuit.
Further, it is characterized in that, described USB on-off circuit is binary channels dpdt double-pole double-throw (DPDT) analog switch, the first end of described binary channels dpdt double-pole double-throw (DPDT) analog switch is the second end of described USB on-off circuit, and the second end of described binary channels dpdt double-pole double-throw (DPDT) analog switch is the first end of described USB on-off circuit;
The first pin of the first end of described binary channels dpdt double-pole double-throw (DPDT) analog switch and crus secunda are connected with the first data terminal and second data terminal of the first end of described USB interface respectively, the first pin of the second end of described binary channels dpdt double-pole double-throw (DPDT) analog switch is connected with the first data pin and second data pin of described microprocessor chip respectively with crus secunda, the second end tripod and the 4th pin sky of described binary channels dpdt double-pole double-throw (DPDT) analog switch are thrown, the control input end of described binary channels dpdt double-pole double-throw (DPDT) analog switch is connected with the control output end of described microprocessor chip, the earth terminal of described USB interface is connected with the earth terminal of described microprocessor chip.
Further, described USB on-off circuit is the first single-pole single-throw (SPST) analog switch, the first end of described the first single-pole single-throw (SPST) analog switch is the second end of described USB on-off circuit, and the second end of described the first single-pole single-throw (SPST) analog switch is the first end of described USB on-off circuit;
The first data terminal of described first first end of single-pole single-throw (SPST) analog switch and the first end of described USB interface, the second end of described the first single-pole single-throw (SPST) analog switch is connected with the first data pin of described microprocessor chip, the second data terminal of the first end of described USB interface is connected with the second data pin of described microprocessor chip, described first control input end of single-pole single-throw (SPST) analog switch and the control output end of described microprocessor chip are connected, and the earth terminal of described USB interface is connected with the earth terminal of described microprocessor chip.
Further, described USB on-off circuit is the second single-pole single-throw (SPST) analog switch, the first end of described the second single-pole single-throw (SPST) analog switch is the second end of described USB on-off circuit, and the second end of described the second single-pole single-throw (SPST) analog switch is the first end of described USB on-off circuit;
The second data terminal of described second first end of single-pole single-throw (SPST) analog switch and the first end of described USB interface is connected, the corresponding connection of the second data pin of the second end of described the second single-pole single-throw (SPST) analog switch and described microprocessor chip, the first data terminal of the first end of described USB interface is connected with the first data pin of described microprocessor chip, described second control input end of single-pole single-throw (SPST) analog switch and the control output end of described microprocessor chip are connected, and the earth terminal of described USB interface is connected with the earth terminal of described microprocessor chip.
The utility model also provides a kind of electronic equipment, and described electronic equipment comprises the USB interface being connected with exterior terminal, it is characterized in that, described electronic equipment also comprises the electronic functionalities commutation circuit as described in as arbitrary in claim 1-7.
In the utility model, the conducting of USB on-off circuit or shutoff described in the function switch-over control signal control that described microprocessor chip sends according to function switching key circuit, and then the data communication between described electronic equipment and described exterior terminal is connected and is controlled, avoid because usb data passage takies the problem that causes phase mutual interference when user is operated to exterior terminal or electronic equipment, the security that has improved user's operating electronic equipment simultaneously.
Brief description of the drawings
Fig. 1 is the modular structure figure of the electronic equipment that provides of the utility model embodiment;
Fig. 2 is the circuit structure diagram of the USB on-off circuit that provides of the utility model the first embodiment;
Fig. 3 is the circuit structure diagram of the USB on-off circuit that provides of the utility model the second embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows the circuit structure of the electronic functionalities commutation circuit that the utility model embodiment provides, and for convenience of explanation, only lists the part relevant to the utility model embodiment, and details are as follows:
The utility model embodiment provides a kind of electronic functionalities commutation circuit, comprise the USB interface 201 being connected with exterior terminal 100, exterior terminal 100 includes but not limited to it is computing machine, mobile phone, PAD, ATM etc., and this electronic functionalities commutation circuit also comprises:
Function switching key circuit 203, USB on-off circuit 204 and microprocessor chip U1;
The output terminal of function switching key circuit 203 is connected with the corresponding pin of microprocessor chip U1 respectively with the first end of USB on-off circuit 204;
The second end of USB on-off circuit 204 is connected with the data pin of the first end of USB interface 201, and the power pins of the first end of USB interface 201 is connected with the power end of microprocessor chip U1, and the second end of USB interface 201 is connected with exterior terminal 100.
In the utility model embodiment, USB interface 201 is A type USB interface or Type B USB interface or miniUSB interface or microUSB interface, this electronic equipment is multi-function electronic device, can realize several functions, include but not limited to it is USBKEY, USB flash disk, digital camera, Digital Video etc., electronic product, in the utility model embodiment, this electronic equipment is connected by USB interface with exterior terminal 100, when acquiescence after exterior terminal 100 these electronic equipments of identification is carried out usb communication correlation function.
As the utility model one embodiment, this electronic functionalities commutation circuit also comprises the display screen 202 or the current function indicating circuit 205 that are connected with microprocessor chip U1.
In the utility model embodiment, it is liquid crystal touch screen that described display screen 202 can be, but not limited to.
As the utility model one embodiment, current function indicating circuit 205 comprises voice broadcast module 2051 and/or indicating lamp module 2052.
In the utility model embodiment, voice broadcast module 2051 is switched prompting when this electronic equipment carries out function switching, and indicating lamp module 2052 carries out corresponding function instruction.
As the utility model one embodiment, function switching key circuit 203 is physical button circuit or virtual key circuit or physical button and virtual key Macintosh control circuit.
embodiment mono-:
Fig. 2 shows the circuit structure of the USB on-off circuit that the utility model the first embodiment provides, and for convenience of explanation, only lists the part relevant to the utility model embodiment, and details are as follows:
As the utility model one embodiment, USB on-off circuit 204 comprises binary channels dpdt double-pole double-throw (DPDT) analog switch K1, the first end of binary channels dpdt double-pole double-throw (DPDT) analog switch K1 is the second end of USB on-off circuit 204, and the second end of binary channels dpdt double-pole double-throw (DPDT) analog switch K1 is the first end of USB on-off circuit 204;
The first pin A1 of the first end of binary channels dpdt double-pole double-throw (DPDT) analog switch K1 and crus secunda A2 are connected with the first data terminal B1 and the second data terminal B2 of the first end of USB interface 201 respectively, the the firstth pin A3 of the second end of binary channels dpdt double-pole double-throw (DPDT) analog switch K1 is connected with the first data pin C1 and the second data pin C2 of microprocessor chip U1 respectively with crus secunda A4, tripod A5 and the 4th pin A6 sky of the second end of binary channels dpdt double-pole double-throw (DPDT) analog switch K1 are thrown, the control input end S of binary channels dpdt double-pole double-throw (DPDT) analog switch K1 is connected with the control output end N of microprocessor chip U1, the earth terminal of USB interface 201 is connected with the earth terminal of microprocessor chip U1.
The principle of work of the electronic functionalities commutation circuit below the utility model embodiment being provided describes, and details are as follows:
In the time that electronic equipment is connected with exterior terminal by USB, electronic equipment acquiescence is opened usb data communication function, this usb data communication function is that electronic equipment receives by USB interface the order data that exterior terminal sends, electronic equipment is explained this order data, complete corresponding operating, after allowing, response data is returned to external unit by USB interface, in the time that user carries out function switching with function switching key circuit 203, function switching key circuit 203 can be exported a curtage signal to microprocessor chip U1, microprocessor chip U1 controls USB on-off circuit 204 according to the curtage signal receiving and turn-offs in carrying out function switching, and then control this electronic equipment and can not carry out usb communication correlation function by USB interface and exterior terminal, thereby can not affect and when this electronic equipment is connected with exterior terminal 100, carry out other functions, avoid the interference of exterior terminal to it in the time that electronic equipment is carried out the second function, also improved the security of carrying out the second function, but can power by USB interface 201, in the time that user is switched back usb communication function, microprocessor chip U1 controls 204 conductings of USB on-off circuit again, thereby recover the usb data communication function between this electronic equipment and exterior terminal 100.
embodiment bis-:
Fig. 3 shows the circuit structure of the USB on-off circuit that the utility model the second embodiment provides, and for convenience of explanation, only lists the part relevant to the utility model embodiment, and details are as follows:
As the utility model one embodiment, USB on-off circuit 204 is the first single-pole single-throw (SPST) analog switch K2, the first end of the first single-pole single-throw (SPST) analog switch K2 is the second end of USB on-off circuit 204, and the second end of the first single-pole single-throw (SPST) analog switch K2 is the first end of USB on-off circuit 204;
The first data terminal E1 of the first first end D1 of single-pole single-throw (SPST) analog switch K2 and the first end of USB interface 201 is connected, the second end D2 of the first single-pole single-throw (SPST) analog switch K2 is connected with the first data pin F1 of microprocessor chip U1, the second data terminal E2 of the first end of USB interface 201 is connected with the second data pin F2 of microprocessor chip U1, the first control input end Q of single-pole single-throw (SPST) analog switch K2 and the control output end M of microprocessor chip U1 are connected, and the earth terminal of USB interface 201 is connected with the earth terminal of microprocessor chip U1.
As the utility model one embodiment, USB on-off circuit 204 also has another kind of embodiment: USB on-off circuit 204 is the second single-pole single-throw (SPST) analog switch K3, the first end of the second single-pole single-throw (SPST) analog switch K3 is the second end of USB on-off circuit 204, and the second end of the second single-pole single-throw (SPST) analog switch K3 is the first end of USB on-off circuit 204;
The second data terminal E2 of the second first end D1 of single-pole single-throw (SPST) analog switch K3 and the first end of USB interface 201 is connected, the second end D2 of the second single-pole single-throw (SPST) analog switch K3 is connected with the second data pin F2 of microprocessor chip U1, the first data terminal E1 of the first end of USB interface 201 is connected with the first data pin F1 of microprocessor chip U1, the second control input end Q of single-pole single-throw (SPST) analog switch K3 and the control output end M of microprocessor chip U1 are connected, and the earth terminal of USB interface 201 is connected with the earth terminal of microprocessor chip U1.
In the utility model the second embodiment, the control principle adopting is identical with the first embodiment, when carrying out other function, this electronic equipment cuts off the data channel between electronic equipment and exterior terminal 100, in the first embodiment, be that two data channel are all cut off, in the present embodiment, only cut off the arbitrary passage in two data channel, when needs use USB correlation function, control 204 conductings of USB on-off circuit.
The utility model embodiment also provides a kind of electronic equipment, and this electronic equipment comprises the USB interface being connected with exterior terminal, also comprises electronic functionalities commutation circuit as above.
In the utility model embodiment, the conducting of USB on-off circuit or shutoff described in the function switch-over control signal control that described microprocessor chip sends according to function switching key circuit, and then the data communication between described electronic equipment and described exterior terminal is connected and is controlled, avoid because usb data passage takies the problem that causes phase mutual interference when user is operated to exterior terminal or electronic equipment, the security that has improved user's operating electronic equipment simultaneously.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any amendments of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (8)
1. an electronic functionalities commutation circuit, comprises the USB interface being connected with exterior terminal, it is characterized in that, described electronic functionalities commutation circuit also comprises:
Function switching key circuit, USB on-off circuit and microprocessor chip;
The output terminal of described function switching key circuit is connected with the corresponding pin of described microprocessor chip respectively with the first end of described USB on-off circuit;
The second end of described USB on-off circuit is connected with the data pin of the first end of described USB interface, and the power pins of the first end of described USB interface is connected with the power end of described microprocessor chip, and the second end of described USB interface is connected with described exterior terminal.
2. electronic functionalities commutation circuit as claimed in claim 1, is characterized in that, described electronic functionalities commutation circuit also comprises the display screen or the current function indicating circuit that are connected with described microprocessor chip.
3. electronic functionalities commutation circuit as claimed in claim 2, is characterized in that, described current function indicating circuit comprises voice broadcast module and/or indicating lamp module.
4. electronic functionalities commutation circuit as claimed in claim 1, is characterized in that, described function switching key circuit is physical button circuit or virtual key circuit or physical button and virtual key Macintosh control circuit.
5. electronic functionalities commutation circuit as claimed in claim 1, it is characterized in that, described USB on-off circuit is binary channels dpdt double-pole double-throw (DPDT) analog switch, the first end of described binary channels dpdt double-pole double-throw (DPDT) analog switch is the second end of described USB on-off circuit, and the second end of described binary channels dpdt double-pole double-throw (DPDT) analog switch is the first end of described USB on-off circuit;
The first pin of the first end of described binary channels dpdt double-pole double-throw (DPDT) analog switch and crus secunda are connected with the first data terminal and second data terminal of the first end of described USB interface respectively, the first pin of the second end of described binary channels dpdt double-pole double-throw (DPDT) analog switch is connected with the first data pin and second data pin of described microprocessor chip respectively with crus secunda, the second end tripod and the 4th pin sky of described binary channels dpdt double-pole double-throw (DPDT) analog switch are thrown, the control input end of described binary channels dpdt double-pole double-throw (DPDT) analog switch is connected with the control output end of described microprocessor chip, the earth terminal of described USB interface is connected with the earth terminal of described microprocessor chip.
6. electronic functionalities commutation circuit as claimed in claim 1, it is characterized in that, described USB on-off circuit is the first single-pole single-throw (SPST) analog switch, the first end of described the first single-pole single-throw (SPST) analog switch is the second end of described USB on-off circuit, and the second end of described the first single-pole single-throw (SPST) analog switch is the first end of described USB on-off circuit;
The first data terminal of described first first end of single-pole single-throw (SPST) analog switch and the first end of described USB interface, the second end of described the first single-pole single-throw (SPST) analog switch is connected with the first data pin of described microprocessor chip, the second data terminal of the first end of described USB interface is connected with the second data pin of described microprocessor chip, described first control input end of single-pole single-throw (SPST) analog switch and the control output end of described microprocessor chip are connected, and the earth terminal of described USB interface is connected with the earth terminal of described microprocessor chip.
7. electronic functionalities commutation circuit as claimed in claim 1, it is characterized in that, described USB on-off circuit is the second single-pole single-throw (SPST) analog switch, the first end of described the second single-pole single-throw (SPST) analog switch is the second end of described USB on-off circuit, and the second end of described the second single-pole single-throw (SPST) analog switch is the first end of described USB on-off circuit;
The second data terminal of described second first end of single-pole single-throw (SPST) analog switch and the first end of described USB interface is connected, the second end of described the second single-pole single-throw (SPST) analog switch is connected with the second data pin of described microprocessor chip, the first data terminal of the first end of described USB interface is connected with the first data pin of described microprocessor chip, described second control input end of single-pole single-throw (SPST) analog switch and the control output end of described microprocessor chip are connected, and the earth terminal of described USB interface is connected with the earth terminal of described microprocessor chip.
8. an electronic equipment, described electronic equipment comprises the USB interface being connected with exterior terminal, it is characterized in that, described electronic equipment also comprises the electronic functionalities commutation circuit as described in as arbitrary in claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420053987.9U CN203746075U (en) | 2014-01-27 | 2014-01-27 | Electronic equipment and function switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420053987.9U CN203746075U (en) | 2014-01-27 | 2014-01-27 | Electronic equipment and function switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203746075U true CN203746075U (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420053987.9U Expired - Fee Related CN203746075U (en) | 2014-01-27 | 2014-01-27 | Electronic equipment and function switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203746075U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113760804A (en) * | 2021-01-25 | 2021-12-07 | 苏州臻迪智能科技有限公司 | Module identification method and device, storage medium and electronic equipment |
-
2014
- 2014-01-27 CN CN201420053987.9U patent/CN203746075U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113760804A (en) * | 2021-01-25 | 2021-12-07 | 苏州臻迪智能科技有限公司 | Module identification method and device, storage medium and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20190127 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |