CN105045169A - Multifunctional startup and shutdown circuit and startup and shutdown method - Google Patents
Multifunctional startup and shutdown circuit and startup and shutdown method Download PDFInfo
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- CN105045169A CN105045169A CN201510341669.1A CN201510341669A CN105045169A CN 105045169 A CN105045169 A CN 105045169A CN 201510341669 A CN201510341669 A CN 201510341669A CN 105045169 A CN105045169 A CN 105045169A
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
Abstract
The invention discloses a multifunctional startup and shutdown circuit and a startup and shutdown method. The multifunctional startup and shutdown circuit comprises a button, a voltage division circuit, a software control circuit and a hardware control circuit, wherein the button is connected to an external power supply; an input terminal of the voltage division circuit is connected to the button and the voltage division circuit is used for carrying out voltage division transmission on an external power supply voltage; the software control circuit comprises a processor detection circuit and a processor control circuit; the processor detection circuit is used for detecting whether the button is closed; the processor control circuit is used for carrying out software control on opening and closing of a rear end system power supply; the hardware control circuit is used for carrying out hardware control on closing of the rear end system power supply. By using the multifunctional startup and shutdown circuit in the invention, the circuit is simple and cost is low, the circuit is safe and reliable, performance is good and energy consumption is less. Operation of the startup and shutdown method is simple and startup and shutdown are convenient. An experience comfort level of a user is effectively increased.
Description
Technical field
The present invention relates to on/off circuit, be specifically related to a kind of Multifunction open shutdown circuit and method for start-up and shutdown.
Background technology
In daily life and scientific research study, all be unable to do without electronic equipment.And at present electronic equipment, particularly in hand-held (consumption) electronic equipment, on/off circuit is absolutely necessary circuit.If use special switching on and shutting down chip in the electronic device, the cost of whole equipment will be increased, and special switching on and shutting down chip requires the input voltage of certain limit, exceed this and enclose and must reselect chip, complicated operation, poor for applicability.If do not use special switching on and shutting down chip, its some basic functions possibly cannot reach, and the on/off circuit that present stage uses various chips to piece together, its circuit structure is complicated, redundancy, easily causes the increase of the loss of energy, the waste of performance and cost in the process of application.
Therefore a kind of circuit is simple, cost is low, and safe and reliable, Multifunction open shutdown circuit of good performance and method for start-up and shutdown urgently propose.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention proposes a kind of Multifunction open shutdown circuit and method for start-up and shutdown, this circuit is simple, cost is low and safe and reliable, functional, power consumption is few, and this method for start-up and shutdown is simple to operate, switching on and shutting down are convenient, the experience comfort level of effective adding users.
In order to achieve the above object, technical scheme of the present invention is as follows:
A kind of Multifunction open shutdown circuit, comprising: button, and button is connected with outside power supply; Bleeder circuit, the input end of bleeder circuit is connected with button, for the supply voltage of outside is carried out dividing potential drop transmission; Software controlled circuitry, comprising: processor testing circuit and processor control circuit; Whether processor testing circuit closes for detecting button, and processor control circuit is used for the opening and closing of software control back-end system power supply; Hardware control circuit, for the closedown of hardware controls back-end system power supply.
A kind of Multifunction open shutdown circuit of the present invention, its structure is simple, the each several part division of labor is clear and definite, utilize software controlled circuitry to control the opening and closing of back-end system power supply, and hardware control circuit effectively can realize the closedown of back-end system power supply, when software controlled circuitry cannot realize the closedown of back-end system power supply, hardware control circuit still can realize the closedown of its rear end system power supply rapidly, realizes shutdown.
On the basis of technique scheme, also can do following improvement:
As preferred scheme, hardware control circuit comprises: hardware shutdown circuit and discharge circuit.
Adopt above-mentioned preferred scheme, hardware shutdown circuit is used for realizing hardware shutdown, and discharge circuit makes hardware shutdown circuit effectively stable, can not produce conflict after shutdown with the start of next time.
As preferred scheme, bleeder circuit comprises multiple divider resistance; Processor testing circuit comprises: reverse buffer (U1), and the input pin of reverse buffer (U1) is connected with divider resistance, and the output pin of reverse buffer (U1) is connected with the detection pin of processor; Processor control circuit comprises: resistance (R8), resistance (R8) one end is connected with the positive pole of diode (D2), the other end of resistance (R8) is connected with the control pin of processor, and the negative pole of diode (D2) is connected with the power control pin of back-end system; Hardware shutdown circuit comprises: electric capacity (C3) and metal-oxide-semiconductor (Q1), the grid of electric capacity (C3) one end, metal-oxide-semiconductor (Q1) is connected with button (S1), the other end ground connection of electric capacity (C3), the drain electrode of metal-oxide-semiconductor (Q1) is connected with the power control pin of back-end system, the source ground of metal-oxide-semiconductor (Q1); Discharge circuit comprises: diode (D3) and discharge resistance, the positive pole of diode (D3) is connected with one end of electric capacity (C3), one end that the negative pole of diode (D3) is connected with discharge resistance, the other end ground connection of discharge resistance.
Adopt above-mentioned preferred scheme, this circuit is simple, cost is low and safe and reliable, functional, and power consumption is few.
As preferred scheme, hardware shutdown circuit also comprises resistance (R9), and one end of resistance (R9) is connected with button (S1), and the other end of resistance (R9) is connected with electric capacity (C3).
Adopt above-mentioned preferred scheme, ensure the validity of hardware shutdown circuit, have certain time-delay and dividing potential drop effect, prevent electric capacity (C3) duration of charging too fast, cause the hard unused time too short.
As preferred scheme, divider resistance comprises: resistance (R1), resistance (R3), resistance (R5), resistance (R7), one end of resistance (R1), one end of resistance (R5) are connected with button (S1), and the other end of resistance (R1) is with resistance (R3), be connected with the input end of reverse buffer (U1); The other end of resistance (R5) is with resistance (R7), be connected with the positive pole of diode (D1), the negative pole of diode (D1) is connected with the power control pin of back-end system, the other end ground connection of resistance (R7).
Adopt above-mentioned preferred scheme, utilize divider resistance, make this circuit can the input of direct supply of compatible any voltage, compatible performance be better.
As preferred scheme, discharge resistance comprises: resistance (R5) and resistance (R7), one end of resistance (R5) is connected with the negative pole of diode (D3), button (S1), and the other end of resistance (R5) is connected with resistance (R7).
Adopt above-mentioned preferred scheme, more optimized structure, resistance (R5) and resistance (R7) realize the effect of dividing potential drop and electric discharge simultaneously, and save cost, energy consumption is little.
As preferred scheme, be arranged in parallel electric capacity (C1) at resistance (R7) two ends.
Adopt above-mentioned preferred scheme, can effectively keep the level of the power control pin of back-end system steady.In the process that button (S1) is pinned, finger may make button (S1) disconnect in a flash at certain because of shake, causes the level of the power control pin of back-end system to be dragged down instantaneously, causes boot failure.And after the two ends shunt capacitance (C1) of resistance (R7), even if certain pinning at button (S1) disconnects in a flash, within this time, electric capacity (C1) can discharge, the power control pin maintaining back-end system is high level, keep the level of back-end system power control pin steady, improve the Experience Degree of user.
As preferred scheme, the power control pin of back-end system is also connected with one end of resistance (R8), the other end ground connection of resistance (R8), and has also been arranged in parallel electric capacity (C2) at resistance (R8) two ends.
Adopt above-mentioned preferred scheme, ensure the security of the power control pin of back-end system, and the electric capacity (C2) arranged effectively can keep the level of the power control pin of back-end system steady.The level of the power control pin of back-end system, after certain is interfered in a flash, may drags down, cause boot failure by the control pin of the processor in processor control circuit.And after the two ends shunt capacitance (C2) of resistance (R8), even if the control pin of processor is interfered in a flash at certain, within this time, electric capacity (C2) can discharge, the power control pin maintaining back-end system is high level, keep the level of back-end system power control pin steady, improve the Experience Degree of user.
Utilize Multifunction open shutdown circuit to carry out the method for start-up and shutdown of switching on and shutting down, starting-up method is: pressed by button (S1); If the time of button is less than the hard unused time, then start shooting successfully; If the time of button is more than or equal to the hard unused time, then boot failure; Software closedown method is: utilize processor to control, and realizes shutdown; Hardware closedown method is, is pressed by button (S1); If the time of button is more than or equal to the hard unused time, then shut down successfully; If the time of button is less than the hard unused time, then failure of shutting down.
Adopt above-mentioned preferred scheme, method for start-up and shutdown is simply effective.
Accompanying drawing explanation
The structural representation of a kind of Multifunction open shutdown circuit that Fig. 1 provides for the embodiment of the present invention.
The circuit diagram of a kind of Multifunction open shutdown circuit that Fig. 2 provides for the embodiment of the present invention.
The process flow diagram of the method for start-up and shutdown that Fig. 3 provides for the embodiment of the present invention.
The hard unused time that Fig. 4 provides for the embodiment of the present invention and metal-oxide-semiconductor gate voltage curve figure.
Wherein: 1 button, 2 bleeder circuits, 3 hardware control circuits, 31 hardware shutdown circuits, 32 discharge circuits, 4 software controlled circuitry, 41 processor testing circuits, 42 processor control circuits.
Embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
In order to reach object of the present invention, in the some of them embodiment of a kind of Multifunction open shutdown circuit and method for start-up and shutdown,
As shown in Figure 1, a kind of Multifunction open shutdown circuit, comprising: button 1, bleeder circuit 2, hardware control circuit 3 and software controlled circuitry 4.Hardware control circuit 3 is all connected with the power control pin of back-end system with software controlled circuitry 4, if the power control pin level of back-end system is high, back-end system is just started shooting work, is low just shutdown.
Button 1 is connected with outside power supply; The input end of bleeder circuit 2 is connected with button 1, for the supply voltage of outside is carried out dividing potential drop transmission; Hardware control circuit comprises: hardware shutdown circuit 31 and discharge circuit 32, and hardware shutdown circuit 31 is used for realizing hardware shutdown, and discharge circuit 32 makes hardware shutdown circuit 31 effectively stable, can not produce conflict after shutdown with the start of next time; Software controlled circuitry 4 comprises: processor testing circuit 41 and processor control circuit 42; Whether processor testing circuit 41 closes for detecting button, and processor control circuit 42 is for the opening and closing of software control back-end system power supply.
As shown in Figure 2, bleeder circuit 2 comprises multiple divider resistance, be respectively: resistance (R1), resistance (R3), resistance (R5), resistance (R7), one end of resistance (R1), one end of resistance (R5) are connected with button (S1), and the other end of resistance (R1) is with resistance (R3), be connected with the input pin of reverse buffer (U1); The other end of resistance (R5) is with resistance (R7), be connected with the positive pole of diode (D1), the negative pole of diode (D1) is connected with the power control pin (PWR_CON) of back-end system, the other end ground connection of resistance (R7).
Processor testing circuit 41 comprises: reverse buffer (U1), and the input pin of reverse buffer (U1) is connected with resistance (R1), the output pin of reverse buffer (U1) is with the detection pin (CPU_DET) of processor, be connected with resistance (R2), the grounding leg ground connection of reverse buffer (U1), the power pins that supply pin and one of them voltage of resistance (R2), back-end system of reverse buffer (U1) are 3.3V is connected.
Processor control circuit 42 comprises: resistance (R8), resistance (R8) one end is connected with the positive pole of diode (D2), the other end of resistance (R8) is connected with the control pin (CPU_CON) of processor, and the negative pole of diode (D2) is connected with the power control pin (PWR_CON) of back-end system, the positive pole of diode (D2) is also connected with resistance (R4), and the power pins that the other end of resistance (R4) is 3.3V with one of them voltage of back-end system is connected.
Hardware shutdown circuit 31 comprises: resistance (R9), electric capacity (C3) and metal-oxide-semiconductor (Q1), one end of resistance (R9) is connected with button (S1), the other end of resistance (R9) is connected with the grid of electric capacity (C3), metal-oxide-semiconductor (Q1), the other end ground connection of electric capacity (C3), the drain electrode of metal-oxide-semiconductor (Q1) is connected with the power control pin (PWR_CON) of back-end system, the source ground of metal-oxide-semiconductor (Q1).
Discharge circuit 32 comprises: diode (D3), resistance (R5) and resistance (R7), the positive pole of diode (D3) is connected with one end of electric capacity (C3), the negative pole of diode (D3) is connected with resistance (R5), the other end of resistance (R5) is connected with resistance (R7), has been arranged in parallel electric capacity (C1) at resistance (R7) two ends.
The power control pin (PWR_CON) of back-end system is also connected with one end of resistance (R8), the other end ground connection of resistance (R8), and be also arranged in parallel electric capacity (C2) at the two ends of resistance (R8).
The switching on and shutting down principle of a kind of Multifunction open of the present invention shutdown circuit is as follows:
1) under off-mode when button (S1) is pressed, outside power supply (DC_IN) power to whole on/off circuit and back-end system, and processor can work together at once.
2) the processor testing circuit in software controlled circuitry detects that button (S1) is pressed, and so the power control pin of back-end system (PWR_CON) level will be drawn high by processor control circuit.Even if now trip switch, the power supply of back-end system also can not disconnect.Certainly, the power supply that can be directly also about 3.3V by one of them voltage of back-end system is connected to the power control pin (PWR_CON) of back-end system, the action that alternate process device is drawn high.
Wherein, button (S1) is by how long starting shooting, this time be exactly in software control module processor testing circuit detect that button (S1) is pressed processor control circuit and drawn high during this period of time by the power control pin level of back-end system, can arrange by software within a processor, make it more meet the personal settings of people, make people obtain better use sense and be subject to.
3), after system boot, the Energy control level of back-end system directly can drag down and realize shutdown by processor.
4) if processor crashes, when software cannot realize shutdown, long button (S1), hard shutdown circuit in hardware control module is started working, electric capacity (C3) in hard shutdown circuit starts charging, when being charged to certain voltage, metal-oxide-semiconductor (Q1) conducting be connected with electric capacity (C3), directly drags down the power control pin level of back-end system and realizes shutdown.Wherein, the resistance (R9) in hard shutdown circuit effectively can extend the duration of charging of electric capacity (C3), prevents the hard unused time too short.
5) after shutdown, electricity is bled off by the discharge circuit in hardware control module by electric capacity (C3) in hard shutdown circuit fast, when avoiding and then starting shooting, in electric capacity (C3) short time, just the charged power control pin level by back-end system drags down all the time, causes starting shooting.
The long time of shutting down by button (S1) is exactly the time that electric capacity (C3) charging reaches metal-oxide-semiconductor (Q1) conducting, capacity with electric capacity (C3) is relevant, can be regulated the time of hard shutdown by the electric capacity changing different capabilities.Hardware control circuit is pressed and software controlled circuitry works simultaneously due to button (S1), so push button when start, the time of (S1) can not exceed the time of hard shutdown, and inside processor, the length of software design patterns can not exceed the time of hard shutdown by the time that button (S1) is started shooting.
In the process that button (S1) is pinned, finger may make button (S1) disconnect instantaneously at certain because of shake, cause the level of the power control pin of back-end system (PWR_CON) to be dragged down instantaneously, cause boot failure.And after the two ends shunt capacitance (C1) of resistance (R7), even if certain pinning at button (S1) disconnects in a flash, within this time, electric capacity (C1) can discharge, the power control pin (PWR_CON) maintaining back-end system is high level, keep the level of back-end system power control pin (PWR_CON) steady, improve the Experience Degree of user.
The level of the power control pin of back-end system (PWR_CON), after certain is interfered in a flash, may drags down, cause boot failure by the control pin (CPU_CON) of the processor in processor control circuit 42.And after the two ends shunt capacitance (C2) of resistance (R8), even if the control pin of processor (CPU_CON) is interfered in a flash at certain, within this time, electric capacity (C2) can discharge, the power control pin (PWR_CON) maintaining back-end system is high level, keep the level of back-end system power control pin (PWR_CON) steady, improve the Experience Degree of user.
As shown in Figure 3, utilize Multifunction open shutdown circuit to carry out the method for start-up and shutdown of switching on and shutting down, starting-up method is:
Button (S1) is pressed;
If the time of button is less than the hard unused time, then start shooting successfully;
If the time of button is more than or equal to the hard unused time, then boot failure;
Software closedown method is: utilize processor to control, and realizes shutdown;
Hardware closedown method is, is pressed by button (S1);
If the time of button is more than or equal to the hard unused time, then shut down successfully;
If the time of button is less than the hard unused time, then failure of shutting down.
Adopt above-mentioned preferred scheme, method for start-up and shutdown is simply effective.
As shown in Figure 4, suppose in hardware shutdown circuit, the grid voltage of metal-oxide-semiconductor (Q1) is V, and the voltage of external input power (DC_IN) is V
i, the resistance of resistance (R9) is R, and the capacitance of electric capacity (C3) is C, and the time (i.e. button (S1) pin time) of hardware shutdown is t, then the functional relation between individual parameter is as follows:
V＝V
i×(1-e
-t/RC)
Wherein: e is natural constant, when the value of V reaches the forward voltage of metal-oxide-semiconductor Q1, hard shutdown is just achieved.After the forward voltage determining metal-oxide-semiconductor (Q1) with accurate hard unused time, the value of RC can be obtained by above-mentioned formula.Thus, choose the capacitance electric capacity (C3) of the resistance (R9) of suitable resistance.
A kind of Multifunction open shutdown circuit of the present invention, its structure is simple, and each several part division of labor is clear and definite, is made up of chip piece and multiple discrete component, cost is low, achieve basic on/off circuit function, realize software start and hardware shutdown, and software is started shooting and the hardware unused time is adjustable, the setting of software on time can effectively prevent from button from slipping up because of carelessness pressing down, and cause the machine of opening by mistake, be less than the hard unused time when the time that button presses down is greater than the on time, successfully start shooting; And when processor crashes, software shutdown cannot realize, adopt the mode of hardware shutdown, make operation simpler.
What substantially adopt due to the dynamo-electric road of a kind of multifunction switch of the present invention is discrete component, components and parts utilization factor is high, and when the voltage of external input power changes, can adjust some divider resistances comes adaptive, it does not adopt conventional single-chip microcomputer, make overall circuit structure more simple and clear, and functional.
A kind of Multifunction open shutdown circuit utilizes software controlled circuitry 4 to carry out the opening and closing of software control back-end system power supply, and hardware control circuit 3 effectively can realize the closedown of back-end system power supply, when software controlled circuitry cannot realize the closedown of back-end system power supply, hardware control circuit still can realize the closedown of its rear end system power supply rapidly, realizes shutdown.The high voltage of external input power is got a suitable voltage to the power control pin of processor testing circuit and back-end system by bleeder circuit, when the voltage of external input power changes, the resistance of divider resistance can be adjusted to adapt to the power control pin of processor testing circuit and back-end system, make this circuit can the input of direct supply of compatible any voltage, compatible performance be better.
This circuit is simple, cost is low and safe and reliable, functional, and power consumption is few.
Novel preferred implementation, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (9)
1. a Multifunction open shutdown circuit, is characterized in that, comprising:
Button, described button is connected with outside power supply;
Bleeder circuit, the input end of described bleeder circuit is connected with described button, for the supply voltage of outside is carried out dividing potential drop transmission;
Software controlled circuitry, comprising: processor testing circuit and processor control circuit; Whether described processor testing circuit closes for detecting button, and described processor control circuit is used for the opening and closing of software control back-end system power supply;
Hardware control circuit, for the closedown of hardware controls back-end system power supply.
2. Multifunction open shutdown circuit according to claim 1, is characterized in that, described hardware control circuit comprises: hardware shutdown circuit and discharge circuit.
3. Multifunction open shutdown circuit according to claim 2, is characterized in that,
Described bleeder circuit comprises multiple divider resistance;
Described processor testing circuit comprises: reverse buffer (U1), and the input pin of described reverse buffer (U1) is connected with divider resistance, and the output pin of described reverse buffer (U1) is connected with the detection pin of processor;
Described processor control circuit comprises: resistance (R8), described resistance (R8) one end is connected with the positive pole of diode (D2), the other end of resistance (R8) is connected with the control pin of processor, and the negative pole of described diode (D2) is connected with the power control pin of back-end system;
Described hardware shutdown circuit comprises: electric capacity (C3) and metal-oxide-semiconductor (Q1), the grid of described electric capacity (C3) one end, described metal-oxide-semiconductor (Q1) is connected with button (S1), the other end ground connection of described electric capacity (C3), the drain electrode of described metal-oxide-semiconductor (Q1) is connected with the power control pin of described back-end system, the source ground of metal-oxide-semiconductor (Q1);
Described discharge circuit comprises: diode (D3) and discharge resistance, the positive pole of described diode (D3) is connected with one end of electric capacity (C3), the negative pole of described diode (D3) is connected with discharge resistance, the other end ground connection of described discharge resistance.
4. Multifunction open shutdown circuit according to claim 3, it is characterized in that, described hardware shutdown circuit also comprises resistance (R9), one end of described resistance (R9) is connected with described button (S1), and the other end of described resistance (R9) is connected with described electric capacity (C3).
5. Multifunction open shutdown circuit according to claim 4, it is characterized in that, described divider resistance comprises: resistance (R1), resistance (R3), resistance (R5), resistance (R7), one end of one end of described resistance (R1), described resistance (R5) is connected with described button (S1), and the other end of described resistance (R1) is with resistance (R3), be connected with the input end of described reverse buffer (U1); The other end of described resistance (R5) is with resistance (R7), be connected with the positive pole of diode (D1), the negative pole of described diode (D1) is connected with the power control pin of described back-end system, the other end ground connection of described resistance (R7).
6. Multifunction open shutdown circuit according to claim 5, it is characterized in that, described discharge resistance comprises: resistance (R5) and resistance (R7), one end of described resistance (R5) is connected with the negative pole of diode (D3), button (S1), and the other end of resistance (R5) is connected with resistance (R7).
7. Multifunction open shutdown circuit according to claim 6, is characterized in that, has been arranged in parallel electric capacity (C1) at described resistance (R7) two ends.
8. Multifunction open shutdown circuit according to claim 7, it is characterized in that, the power control pin of described back-end system is also connected with one end of resistance (R8), the other end ground connection of resistance (R8), and be also arranged in parallel electric capacity (C2) at described resistance (R8) two ends.
9. utilize Multifunction open shutdown circuit described in any one of claim 1-8 to carry out the method for start-up and shutdown of switching on and shutting down, it is characterized in that, described starting-up method is: pressed by button (S1);
If the time of button is less than the hard unused time, then start shooting successfully;
If the time of button is more than or equal to the hard unused time, then boot failure;
Described software closedown method is: utilize processor to control, and realizes shutdown;
Described hardware closedown method is, is pressed by button (S1);
If the time of button is more than or equal to the hard unused time, then shut down successfully;
If the time of button is less than the hard unused time, then failure of shutting down.
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| CN111427279A (en) * | 2020-02-25 | 2020-07-17 | 江苏亨通问天量子信息研究院有限公司 | Software self-locking type key on-off control system and method |
| CN113075991A (en) * | 2021-04-01 | 2021-07-06 | 深圳市研强物联技术有限公司 | Control circuit and method based on power supply and startup and shutdown in dual-processor system |
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| KR20030009954A (en) * | 2001-07-24 | 2003-02-05 | 삼성전기주식회사 | Apparatus for managing voltage of battery |
| US20110087901A1 (en) * | 2009-10-14 | 2011-04-14 | Shi-Wu Lo | Fast speed computer system power-on & power-off method |
| CN101982960A (en) * | 2010-08-18 | 2011-03-02 | 惠州Tcl移动通信有限公司 | Mobile terminal as well as shutdown device and shutdown method thereof |
| CN102063172A (en) * | 2010-12-29 | 2011-05-18 | 鸿富锦精密工业（深圳）有限公司 | Forced power off circuit |
| CN202342025U (en) * | 2011-11-14 | 2012-07-25 | 广东宝莱特医用科技股份有限公司 | Monitor with software and hardware shutdown function |
| CN103226337A (en) * | 2013-05-03 | 2013-07-31 | 深圳市科曼医疗设备有限公司 | Startup and shutdown circuit |
| CN103869722A (en) * | 2014-04-08 | 2014-06-18 | 广东宝莱特医用科技股份有限公司 | Hard startup / shutdown system |
| CN104702258A (en) * | 2015-03-23 | 2015-06-10 | 曲保章 | Power-up starting power switch with controllable function |
| CN104731305A (en) * | 2015-04-03 | 2015-06-24 | 青岛歌尔声学科技有限公司 | Shutdown control circuit and electronic product with same |
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| CN109379073A (en) * | 2018-10-29 | 2019-02-22 | 努比亚技术有限公司 | Touch key-press detection circuit and its processing method, terminal, storage medium |
| CN111427279A (en) * | 2020-02-25 | 2020-07-17 | 江苏亨通问天量子信息研究院有限公司 | Software self-locking type key on-off control system and method |
| CN113075991A (en) * | 2021-04-01 | 2021-07-06 | 深圳市研强物联技术有限公司 | Control circuit and method based on power supply and startup and shutdown in dual-processor system |
| CN113075991B (en) * | 2021-04-01 | 2023-08-29 | 深圳市研强物联技术有限公司 | Control circuit and method based on power supply and on-off in dual-processor system |
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