CN203522682U - Double-key delay reset circuit and electronic equipment - Google Patents
Double-key delay reset circuit and electronic equipment Download PDFInfo
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- CN203522682U CN203522682U CN201320654423.6U CN201320654423U CN203522682U CN 203522682 U CN203522682 U CN 203522682U CN 201320654423 U CN201320654423 U CN 201320654423U CN 203522682 U CN203522682 U CN 203522682U
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Abstract
The utility model discloses a double-key delay reset circuit and electronic equipment with the double-key delay reset circuit. The double-key delay reset circuit is connected with a micro controller of the electronic equipment. The double-key delay reset circuit comprises a power supply input end, a first key, a second key, a first switch module, a second switch module, a time delay module and a third switch module. According to the double-key delay reset circuit, through the reuse of the first key and the second key, in the condition that a system works normally or crashes, the first key and the second key are pressed at the same time, through the time delay of the time delay module, an effective reset signal is outputted to the reset end of the micro controller, the micro controller is controlled to carry out resetting, the time delay reset function of the electronic equipment is realized, the reliability of the reset circuit is raised, the misoperation of the electronic equipment is avoided, and problems of no reset key and reset operation inconvenience of the electronic equipment are solved in the condition that special reset keys are not increased.
Description
Technical field
The utility model relates to electronic circuit technology field, relates in particular to a kind of pair of button time-delay reset circuit and electronic equipment.
Background technology
At present, in most of electronic equipments (as electronic equipment for consumption), need to solve deadlock problem with resetting, but there is following problem in the reset mode of electronic equipment at present:
1, on electronic equipment, there is no reset key, when electronic equipment crashes, need to cut off the electricity supply or removing battery restart electronic equipment, to solve deadlock problem.
2, on electronic equipment, only have the reset hole that is used for specially realizing reset function, the reduction point that need to trigger electronic equipment through this reset hole by thin rod is realized reset function, and this causes reset operation inconvenient.
3, two buttons on multiplexing electronic equipment reset, and do not carry out time-delay reset processing, if mistake is pressed this two multiplexing buttons simultaneously, electronic equipment will reset, and cause misoperation.
Utility model content
Main purpose of the present utility model is to propose a kind of pair of button time-delay reset circuit and electronic equipment, is intended to improve reset circuit reliability, avoids electronic equipment misoperation, solves electronic equipment without reset key, reset operation inconvenience problem simultaneously.
In order to achieve the above object, the utility model proposes a kind of pair of button time-delay reset circuit, be connected with microcontroller, comprise power input, the first button, the second button, be used for according to the first switch module of described the first key switch condition selecting conducting or shutoff, for select the second switch module of conducting or shutoff according to described the first switch module on off operating mode, for controlling the time delay module of described second switch module time delayed turn-off, and for according to the 3rd switch module of described second switch module on off operating mode and described the second key switch condition selecting conducting or shutoff,
The input of described the first switch module is connected with described the first button with described power input respectively, and output is connected with the control end of described second switch module; The input of described time delay module is connected with described power input, and output is connected with the control end of described second switch module; The input of described second switch module is connected with described power input, and output is connected with the control end of described the 3rd switch module; The input of described the 3rd switch module is connected with described power input via described the second button, and output is connected with the reset terminal of described microcontroller.
Preferably, one end of described the first button is connected with the input of described the first switch module, the other end ground connection of described the first button; One end of described the second button is connected with described power input, and the other end of described the second button is connected with the input of described the 3rd switch module.
Preferably, described the first switch module comprises the first resistance and the first triode; The base stage of described the first triode is connected with described power input via described the first resistance, and via described the first button ground connection, the collector electrode of described the first triode is connected with the control end of described second switch module, the grounded emitter of described the first triode.
Preferably, described the first switch module also comprises the second resistance, and one end of described the second resistance is connected with the common port of described the first button with described the first resistance, and the other end of described the second resistance is connected with the base stage of described the first triode.
Preferably, described time delay module comprises the 3rd resistance and an electric capacity; One end of described electric capacity is connected with the collector electrode of described the first triode with the control end of described second switch module respectively, and via described the 3rd resistance, is connected the other end ground connection of described electric capacity with described power input.
Preferably, described second switch module comprises the second triode; The base stage of described the second triode is connected with the collector electrode of described the first triode, and via described capacity earth, the emitter of described the second triode is connected with described power input, and the collector electrode of described the second triode is connected with the control end of described the 3rd switch module.
Preferably, described second switch module comprises also the 4th resistance; One end of described the 4th resistance is connected with the collector electrode of described the first triode, and via described capacity earth, the other end of described the 4th resistance is connected with the base stage of described the second triode.
Preferably, described the 3rd switch module comprises the 5th resistance, the 6th resistance, the 7th resistance and the 3rd triode; The base stage of described the 3rd triode is connected with the collector electrode of described the second triode, and via described the 5th grounding through resistance, the emitter of described the 3rd triode is connected with described power input via described the second button, and via described the 6th grounding through resistance, described the 3rd collector electrode of triode and the reset terminal of described microcontroller are connected, and via described the 7th grounding through resistance.
Preferably, described the first triode is NPN triode, and described the second triode is PNP triode, and described the 3rd triode is PNP triode.
The utility model also proposes a kind of electronic equipment, this electronic equipment comprises microcontroller, also comprise two button time-delay reset circuits, described pair of button time-delay reset circuit is connected with described microcontroller, comprise power input, the first button, the second button, be used for according to the first switch module of described the first key switch condition selecting conducting or shutoff, for select the second switch module of conducting or shutoff according to described the first switch module on off operating mode, for controlling the time delay module of described second switch module time delayed turn-off, and for according to the 3rd switch module of described second switch module on off operating mode and described the second key switch condition selecting conducting or shutoff,
The input of described the first switch module is connected with described the first button with described power input respectively, and output is connected with the control end of described second switch module; The input of described time delay module is connected with described power input, and output is connected with the control end of described second switch module; The input of described second switch module is connected with described power input, and output is connected with the control end of described the 3rd switch module; The input of described the 3rd switch module is connected with described power input via described the second button, and output is connected with the reset terminal of described microcontroller.
The two button time-delay reset circuits that the utility model proposes, when the first button is pressed, the first switch module turn-offs, time delay module charges to control second switch module time delayed turn-off, when second switch module shuts down and the second button are pressed, the 3rd switch module conducting, export effective reset signal to the reset terminal of microcontroller, make microcontroller the first button detected and the second button is pressed, and reset while effective reset signal being detected again after time delay a period of time.Of the present utility model pair of button time-delay reset circuit, by multiplexing the first button and the second button, in the normal work of system or deadlock situation, when the first button and the second button are pressed simultaneously, after time delay module time delay, export effective reset signal to the reset terminal of microcontroller, controlling microcontroller resets, realize electronic equipment time-delay reset function, improve reset circuit reliability, avoid electronic equipment misoperation, in the situation that not increasing Special reset button, solve electronic equipment without reset key, reset operation inconvenience problem simultaneously.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the two button time-delay reset circuit preferred embodiments of the utility model;
Fig. 2 is the electrical block diagram of the two button time-delay reset circuit preferred embodiments of the utility model.
The realization of the purpose of this utility model, functional characteristics and advantage, in connection with embodiment, and is described further with reference to accompanying drawing.
Embodiment
Below in conjunction with Figure of description and specific embodiment, further illustrate the technical solution of the utility model.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.
The utility model proposes a kind of pair of button time-delay reset circuit.
With reference to Fig. 1, Fig. 1 is the theory diagram of the two button time-delay reset circuit preferred embodiments of the utility model.
Of the present utility model pair of button time-delay reset circuit 100 is applied to electronic equipment, and as electronic equipment for consumption such as portable DVD, Dock audio amplifier, bluetooth SPK, AUDIO, and other need the equipment of reset function.
In the utility model preferred embodiment, two button time-delay reset circuits 100 are connected with the microcontroller 200 of electronic equipment, and this pair of button time-delay reset circuit 100 comprises power input VIN, the first button 110, the second button 120, the first switch module 130, second switch module 140, time delay module 150 and the 3rd switch module 160.The first switch module 130 is for selecting conducting or shutoff according to the on off state of the first button 110, second switch module 140 is for selecting conducting or shutoff according to the on off operating mode of the first switch module 130, time delay module 150 is for controlling second switch module 140 time delayed turn-offs, and the 3rd switch module 160 is for selecting conducting or shutoff according to the on off operating mode of second switch module 140 and the second button 120 on off states.
Wherein, the input of the first switch module 130 is connected with the first button 110 with power input VIN respectively, and the output of the first switch module 130 is connected with the control end of second switch module 140; The input of time delay module 150 is connected with power input VIN, and the output of time delay module 150 is connected with the control end of second switch module 140; The input of second switch module 140 is connected with power input VIN, and the output of second switch module 140 is connected with the control end of the 3rd switch module 160; The input of the 3rd switch module 160 is connected with power input VIN via the second button 120, and the output of the 3rd switch module 160 is connected with the reset terminal of microcontroller 200.
In the present embodiment, in the normal work of system or deadlock situation, when the first button 110 is not pressed, the first switch module 130 conductings, 140 conductings of second switch module; When the first button 110 is pressed, the first switch module 130 turn-offs, time delay module 150 charges, and second switch module 140 conductings, when the difference of the charging voltage of time delay module 150 and the supply voltage of power input VIN input is less than the conducting voltage of second switch module 140, second switch module 140 is turn-offed.
When if the first button 110 is pressed, the second button 120 is not pressed, and the 3rd switch module 160 turn-offs, and the reset signal of output low level is to the reset terminal of microcontroller 200, and reset signal is invalid, and microcontroller 200 is not done homing action.
When if the first button 110 is pressed, the second button 120 is also pressed, the 3rd switch module 160 conductings, supply voltage exports the reset terminal of microcontroller 200 to by the second button 120, the 3rd switch module 160, the reset signal of the 3rd switch module 160 output high level is to the reset terminal of microcontroller 200, reset signal is effective, thereby microcontroller 200 is pressed at the first button 110 and the second button 120, and while effective reset signal being detected again after time delay a period of time, reset, realize electronic equipment time-delay reset function.
If the first button 110 is not pressed, and the second button 120 is pressed, the 3rd switch module 160 turn-offs, and the reset signal of output low level is to the reset terminal of microcontroller 200, and reset signal is invalid, and microcontroller 200 is not done homing action.
With respect to prior art, of the present utility model pair of button time-delay reset circuit 100, by multiplexing the first button 110 and the second button 120, in the normal work of system or deadlock situation, when the first button 110 and the second button 120 are pressed simultaneously, after time delay module 150 time delays, export effective reset signal to the reset terminal of microcontroller 200, controlling microcontroller 200 resets, realize electronic equipment time-delay reset function, improve reset circuit reliability, avoid electronic equipment misoperation, simultaneously in the situation that not increasing Special reset button, solve electronic equipment without reset key, reset operation inconvenience problem.
Refer again to Fig. 2, Fig. 2 is the electrical block diagram of the two button time-delay reset circuit preferred embodiments of the utility model.
In the present embodiment, one end of the first button 110 is connected with the input of the first switch module 130, the other end ground connection of the first button 110.One end of the second button 120 is connected with power input VIN, and the other end of the second button 120 is connected with the input of the 3rd switch module 160.
As shown in Figure 2, the first switch module 130 comprises the first resistance R 1 and the first triode Q1, and wherein, the first triode Q1 is NPN triode; The base stage of the first triode Q1 is connected with power input VIN via the first resistance R 1, and via the first button 110 ground connection, the collector electrode of the first triode Q1 is connected with the control end of second switch module 140, the grounded emitter of the first triode Q1.
The first switch module 130 also comprises that one end of the second resistance R 2, the second resistance R 2 is connected with the common port of the first button 110 with the first resistance R 1, and the other end of the second resistance R 2 is connected with the base stage of the first triode Q1.
Particularly, time delay module 150 comprises the 3rd resistance R 3 and capacitor C 1; One end of capacitor C 1 is connected with the collector electrode of the first triode Q1 with the control end of second switch module 140 respectively, and is connected with power input VIN via the 3rd resistance R 3, the other end ground connection of capacitor C 1.
Particularly, second switch module 140 comprises the second triode Q2, and wherein, the second triode Q2 is PNP triode; The base stage of the second triode Q2 is connected with the collector electrode of the first triode Q1, and via capacitor C 1 ground connection, the emitter of the second triode Q2 is connected with power input VIN, and the collector electrode of the second triode Q2 is connected with the control end of the 3rd switch module 160.
Further, the 3rd switch module 160 comprises the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 3rd triode Q3, and wherein, the 3rd triode Q3 is PNP triode; The base stage of the 3rd triode Q3 is connected with the collector electrode of the second triode Q2, and via the 5th resistance R 5 ground connection, the emitter of the 3rd triode Q3 is connected with power input VIN via the second button 120, and via the 6th resistance R 6 ground connection, the collector electrode of the 3rd triode Q3 is connected with the reset terminal VRST of microcontroller 200, and via the 7th resistance R 7 ground connection.
The operation principle of the two button time-delay reset circuits 100 of the utility model specifically describes as follows:
In the normal work of system or deadlock situation, when the first button 110 and the second button 120 are not all pressed, the supply voltage VCC inputting from power input VIN is via the first resistance R 1, the second resistance R 2 is input to the base stage of the first triode Q1, make the first triode Q1 conducting, now the base stage of the second triode Q2 is dragged down, the base stage of the second triode Q2 is low level, and the supply voltage VCC inputting from power input VIN is input to the emitter of the second triode Q2, the transmitting of the second triode Q2 is high level very, thereby the second triode Q2 conducting, supply voltage VCC is input to the base stage of the 3rd triode Q3 by the second triode Q2, the base stage of the 3rd triode Q3 is high level, and because the emitter of the 3rd triode Q3 is now via the 6th resistance R 6 ground connection, the transmitting of the 3rd triode Q3 is low level very, thereby the 3rd triode Q3 cut-off, the 7th resistance R 7 drags down the reset terminal VRST of microcontroller 200, the reset terminal VRST of microcontroller 200 is low level and do not do homing action.
In the normal work of system or deadlock situation, while only having the first button 110 to be pressed, the base stage of the first triode Q1 is dragged down, the base stage of the first triode Q1 is low level, the first triode Q1 cut-off, now supply voltage VCC gives capacitor C 1 charging by the 3rd resistance R 3, and the base stage of the second triode Q2 is low level, and due to the transmitting of the second triode Q2 high level very, the second triode Q2 conducting; The difference of charging voltage in capacitor C 1 and supply voltage VCC is less than the conducting voltage of the second triode Q2, be that the difference of A point voltage and B point voltage is while being less than the conducting voltage of the second triode Q2, the second triode Q2 becomes cut-off from conducting, now the base stage of the 3rd triode Q3 is dragged down by the 5th resistance R 5, and the base stage of the 3rd triode Q3 is low level; And the emitter of the 3rd triode Q3 is dragged down by the 6th resistance R 6, the emitter of the 3rd triode Q3 is also low level, thereby the 3rd triode Q3 cut-off, the 7th resistance R 7 drags down the reset terminal VRST of microcontroller 200, and the reset terminal VRST of microcontroller 200 is low level and do not do homing action.
In the normal work of system or deadlock situation, while only having the second button 120 to be pressed, supply voltage VCC is input to the emitter of the 3rd triode Q3 by the second button 120, the transmitting of the 3rd triode Q3 is high level very, and supply voltage VCC is via the first resistance R 1, the second resistance R 2 is input to the base stage of the first triode Q1, the first triode Q1 conducting, supply voltage VCC is not to capacitor C 1 charging, the second also conducting of triode Q2, the base stage of the 3rd triode Q3 is high level, thereby the 3rd triode Q3 cut-off, the 7th resistance R 7 drags down the reset terminal VRST of microcontroller 200, the reset terminal VRST of microcontroller 200 is low level and do not do homing action.
In the normal work of system or deadlock situation, when the first button 110 and the second button 120 are pressed simultaneously, the base stage of the first triode Q1 is dragged down, the base stage of the first triode Q1 is low level, the first triode Q1 cut-off, now supply voltage VCC gives capacitor C 1 charging by the 3rd resistance R 3, and the base stage of the second triode Q2 is low level, and due to the transmitting of the second triode Q2 high level very, the second triode Q2 conducting; The difference of charging voltage in capacitor C 1 and supply voltage VCC is less than the conducting voltage of the second triode Q2, be that the difference of A point voltage and B point voltage is while being less than the conducting voltage of the second triode Q2, the second triode Q2 becomes cut-off from conducting, now the base stage of the 3rd triode Q3 is dragged down by the 5th resistance R 5, and the base stage of the 3rd triode Q3 is low level; Supply voltage VCC is input to the emitter of the 3rd triode Q3 by the second button 120 simultaneously, the transmitting of the 3rd triode Q3 is high level very, thereby the 3rd triode Q3 conducting, supply voltage VCC is input to the reset terminal VRST of microcontroller 200 by the second button 120, the 3rd triode Q3, export the reset signal of high level to the reset terminal VRST of microcontroller 200, reset signal is effective.Therefore microcontroller 200 is pressed at the first button 110 and the second button 120, and resets while effective reset signal being detected by reset terminal VRST again after time delay a period of time.
The utility model also proposes a kind of electronic equipment, this electronic equipment comprises microcontroller 200 and two button time-delay reset circuit 100, the structure of this pair of button time-delay reset circuit 100, operation principle and the beneficial effect that brings, all with reference to above-described embodiment, repeat no more herein.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a two button time-delay reset circuit, be connected with microcontroller, it is characterized in that, comprise power input, the first button, the second button, for according to the first switch module of described the first key switch condition selecting conducting or shutoff, for selecting the second switch module of conducting or shutoff according to described the first switch module on off operating mode, for controlling the time delay module of described second switch module time delayed turn-off, and for according to the 3rd switch module of described second switch module on off operating mode and described the second key switch condition selecting conducting or shutoff;
The input of described the first switch module is connected with described the first button with described power input respectively, and output is connected with the control end of described second switch module; The input of described time delay module is connected with described power input, and output is connected with the control end of described second switch module; The input of described second switch module is connected with described power input, and output is connected with the control end of described the 3rd switch module; The input of described the 3rd switch module is connected with described power input via described the second button, and output is connected with the reset terminal of described microcontroller.
2. as claimed in claim 1 pair of button time-delay reset circuit, is characterized in that, one end of described the first button is connected with the input of described the first switch module, the other end ground connection of described the first button; One end of described the second button is connected with described power input, and the other end of described the second button is connected with the input of described the 3rd switch module.
3. the two button time-delay reset circuits as described in any one in claim 1 or 2, is characterized in that, described the first switch module comprises the first resistance and the first triode;
The base stage of described the first triode is connected with described power input via described the first resistance, and via described the first button ground connection, the collector electrode of described the first triode is connected with the control end of described second switch module, the grounded emitter of described the first triode.
4. as claimed in claim 3 pair of button time-delay reset circuit, is characterized in that, described the first switch module also comprises the second resistance; One end of described the second resistance is connected with the common port of described the first button with described the first resistance, and the other end of described the second resistance is connected with the base stage of described the first triode.
5. as claimed in claim 4 pair of button time-delay reset circuit, is characterized in that, described time delay module comprises the 3rd resistance and an electric capacity; One end of described electric capacity is connected with the collector electrode of described the first triode with the control end of described second switch module respectively, and via described the 3rd resistance, is connected the other end ground connection of described electric capacity with described power input.
6. as claimed in claim 5 pair of button time-delay reset circuit, is characterized in that, described second switch module comprises the second triode; The base stage of described the second triode is connected with the collector electrode of described the first triode, and via described capacity earth, the emitter of described the second triode is connected with described power input, and the collector electrode of described the second triode is connected with the control end of described the 3rd switch module.
7. as claimed in claim 6 pair of button time-delay reset circuit, is characterized in that, described second switch module comprises also the 4th resistance; One end of described the 4th resistance is connected with the collector electrode of described the first triode, and via described capacity earth, the other end of described the 4th resistance is connected with the base stage of described the second triode.
8. as claimed in claim 7 pair of button time-delay reset circuit, is characterized in that, described the 3rd switch module comprises the 5th resistance, the 6th resistance, the 7th resistance and the 3rd triode;
The base stage of described the 3rd triode is connected with the collector electrode of described the second triode, and via described the 5th grounding through resistance, the emitter of described the 3rd triode is connected with described power input via described the second button, and via described the 6th grounding through resistance, described the 3rd collector electrode of triode and the reset terminal of described microcontroller are connected, and via described the 7th grounding through resistance.
9. as claimed in claim 8 pair of button time-delay reset circuit, is characterized in that, described the first triode is NPN triode, and described the second triode is PNP triode, and described the 3rd triode is PNP triode.
10. an electronic equipment, comprises microcontroller, it is characterized in that, also comprises the two button time-delay reset circuits described in any one in claim 1 to 9, and described pair of button time-delay reset circuit is connected with described microcontroller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320654423.6U CN203522682U (en) | 2013-10-22 | 2013-10-22 | Double-key delay reset circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320654423.6U CN203522682U (en) | 2013-10-22 | 2013-10-22 | Double-key delay reset circuit and electronic equipment |
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| CN203522682U true CN203522682U (en) | 2014-04-02 |
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| CN201320654423.6U Expired - Fee Related CN203522682U (en) | 2013-10-22 | 2013-10-22 | Double-key delay reset circuit and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106293011A (en) * | 2016-08-31 | 2017-01-04 | 华立科技股份有限公司 | The hard reboot reserve battery electric power system of a kind of pair of button multiplexing and processing method |
| CN107809229A (en) * | 2017-11-20 | 2018-03-16 | 歌尔科技有限公司 | A kind of more key combination hardware reset circuits and electronic product |
-
2013
- 2013-10-22 CN CN201320654423.6U patent/CN203522682U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106293011A (en) * | 2016-08-31 | 2017-01-04 | 华立科技股份有限公司 | The hard reboot reserve battery electric power system of a kind of pair of button multiplexing and processing method |
| CN106293011B (en) * | 2016-08-31 | 2023-09-01 | 华立科技股份有限公司 | Dual-key multiplexing hard-start standby battery power supply system and processing method |
| CN107809229A (en) * | 2017-11-20 | 2018-03-16 | 歌尔科技有限公司 | A kind of more key combination hardware reset circuits and electronic product |
| CN107809229B (en) * | 2017-11-20 | 2024-04-02 | 歌尔科技有限公司 | Multi-key combined hardware reset circuit and electronic product |
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Granted publication date: 20140402 Termination date: 20201022 |