CN203705875U - One-button multifunctional control circuit and wearable electronic product - Google Patents
One-button multifunctional control circuit and wearable electronic product Download PDFInfo
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- CN203705875U CN203705875U CN201420080543.4U CN201420080543U CN203705875U CN 203705875 U CN203705875 U CN 203705875U CN 201420080543 U CN201420080543 U CN 201420080543U CN 203705875 U CN203705875 U CN 203705875U
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Abstract
The utility model discloses a one-button multifunctional control circuit and a wearable electronic product. The one-button multifunctional control circuit comprises a power source, a button circuit, a power source control circuit, a reset circuit and a processor, wherein the button circuit is provided with a button, the power source control circuit realizes on and off of a power supply loop of the processor according to a closing/opening state of the button, the reset circuit is provided with a first switch element and a capacitor charging/discharging circuit, the capacitor charging/discharging circuit controls on and off of the first switch element according to the closing/opening state of the button, and thereby a control signal is generated to control the power source control circuit for off of the power supply loop of the processor or keeping the present state. The one-button multifunctional control circuit needs only one button to realize double functions of on-off control and reset control; by designing an NFC circuit and a power source charging circuit, not only the electronic product has the NFC function and the charging function, but also NFC waking-up and charging power-on functions of the system are realized, and diversity and flexibility of power-on modes of the product are improved.
Description
Technical field
The utility model belongs to electronic circuit technology field, specifically, relates to a kind of for electronic product being realized to the electronic circuit of the functions such as switching on and shutting down control, reset control and being adopted the wearable electronic product of this multifunctional control circuit design.
Background technology
Along with science and technology progress with rapid changepl. never-ending changes and improvements, electronic product is worn and becomes possibility, and be more and more subject to consumers in general's, particularly young consumers favor, the generation of the wearable electronic product of this class will change people's life style.
Current wearable electronic product is more and more intelligent, and intelligentized shortcoming is to adopt microprocessor to control, the problem that can exist thus microprocessor to crash.Once microprocessor crashes, and just need to have reset circuit to carry out power-off, restarts microprocessor.Therefore, in the circuit design of wearable electronic product, need specialized designs reset circuit to realize the reset function of circuit system.Being applied at present reset circuit in wearable electronic product need to design independent reset key and carry out the reset control of circuit system, the circuit design mode of this many buttons not only can cause the increase of electronic product volume, brings some inconvenience also can to user's control operation.
In addition, in current a lot of wearable electronic product, also increased NFC(near field communication (NFC)) function, be used for realizing the functions such as ID identification, wireless pairing connection, simple data communication, to meet consumer's user demand.
Current wearable electronic product, mostly adopts chargeable lithium polymer battery to power, and by cell package at interiors of products.Low-power consumption is to dress the key request of electronic product, so require complete power-off no time, reduces electric energy loss; When use, require start rapidly, and many times also need to control by NFC function realization start.In addition, as far as possible the dwindling of small product size, user's control operation mode simplify as far as possible and water-proof function is also three requirements of wearable electronic product.Above everyway requires wearable electronic product to have less button and mechanically actuated parts.
Summary of the invention
The utility model, in order to simplify the circuit structure of electronic product, person's easy to use control operation, has proposed a kind of one-touch multifunctional control circuit, only a button need be set, and can complete multiple control function.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of one-touch multifunctional control circuit, comprises power supply, key circuit, power control circuit, reset circuit and processor; In described key circuit, be provided with a button and the first current-limiting resistance, described button one end ground connection, the other end connects described power supply by the first current-limiting resistance; Described button is connected power control circuit with the intermediate node of the first current-limiting resistance, and described power control circuit connects or cut off the current supply circuit of processor according to the folding condition of button; In described reset circuit, be provided with the first on-off element and capacitor charge and discharge circuit, described capacitor charge and discharge circuit connects the intermediate node of described button and the first current-limiting resistance, according to the folding condition of button, the electric capacity in capacitor charge and discharge circuit is discharged and recharged to control, described electric capacity connects the first on-off element, the first on-off element break-make generation control signal is controlled in discharging and recharging of described electric capacity, controls power control circuit and cuts off the current supply circuit of processor or keep current state.
Further, in described power control circuit, be provided with second switch element and the 3rd on-off element; The conducting of described second switch element low level, its switch ways is connected between power supply and the energization pins of processor, and control end passes through the switch ways ground connection of the 3rd on-off element, and connects the intermediate node of described button and the first current-limiting resistance; The button of described processor detects the intermediate node that pin connects described button and the first current-limiting resistance, detects the folding condition of button, and then generation switching on and shutting down signal exports the control end of the 3rd on-off element to.
Preferably, described the 3rd on-off element high level conducting, between its switch ways and the control end of second switch element, be connected with divider resistance, described button is connected the intermediate node of the switch ways of described divider resistance and the 3rd on-off element with the intermediate node of the first current-limiting resistance.
Further again, described the first on-off element low level conducting, its control end connects described electric capacity, and switch ways is connected between power supply and the control end of second switch element.
Further, in described capacitor charge and discharge circuit, be also provided with the first diode and discharge resistance in parallel, the intermediate node of button and the first current-limiting resistance described in the anodic bonding of described the first diode, negative electrode connects the control end of described electric capacity and the first on-off element.
Preferably, described the first on-off element is a P channel MOS tube, and described second switch element is the 2nd P channel MOS tube, and described the 3rd on-off element is N-channel MOS pipe; The grid of a described P channel MOS tube connects described electric capacity, and source electrode connects described power supply, and drain electrode connects the grid of the 2nd P channel MOS tube; The source electrode of described the 2nd P channel MOS tube connects described power supply, and drain electrode connects the energization pins of described processor, and grid connects the drain electrode of N-channel MOS pipe by described divider resistance, and connects described power supply by another divider resistance; The source ground of described N-channel MOS pipe, grid connects the pin of described processor output switch machine signal; The drain electrode of described N-channel MOS pipe connects the anode of the second diode, and the negative electrode of the second diode connects the intermediate node of described button and the first current-limiting resistance.
In order to realize NFC function, in described one-touch multifunctional control circuit, be also provided with NFC circuit; Described NFC circuit is in the time having sensed that NFC equipment approaches, the detection pin of putting NFC circuit is low level, described detection pin connects described power supply by the second current-limiting resistance, and be connected with the NFC detection pin of processor and the negative electrode of the 3rd diode respectively, the anodic bonding power control circuit of the 3rd diode, controls power control circuit and cuts off the current supply circuit of processor or keep current state.
In order to realize charging power up function, in described one-touch multifunctional control circuit, be also provided with power charging circuit, comprise charging terminal and bleeder circuit; The charging voltage of inputting by described charging terminal via bleeder circuit dividing potential drop after, export respectively described the 3rd control end of on-off element and the charging of processor to and detect pin.
In order to guarantee the correct flow direction of electric current, the control end of described the 3rd on-off element connects respectively the pin of processor output switch machine signal by the 4th diode, and the charging that connects processor by the 5th diode detects pin.
Based on above-mentioned one-touch multifunctional control circuit, the utility model has also proposed a kind of wearing electronic product that adopts described one-touch multifunctional control circuit design, comprises power supply, key circuit, power control circuit, reset circuit and processor; In described key circuit, be provided with a button and the first current-limiting resistance, described button one end ground connection, the other end connects described power supply by the first current-limiting resistance; Described button is connected power control circuit with the intermediate node of the first current-limiting resistance, and described power control circuit connects or cut off the current supply circuit of processor according to the folding condition of button; In described reset circuit, be provided with the first on-off element and capacitor charge and discharge circuit, described capacitor charge and discharge circuit connects the intermediate node of described button and the first current-limiting resistance, according to the folding condition of button, the electric capacity in capacitor charge and discharge circuit is discharged and recharged to control, described electric capacity connects the first on-off element, generate control signal by controlling the first on-off element break-make, control power control circuit and cut off the current supply circuit of processor or keep current state; Described power supply is battery.
Compared with prior art, advantage of the present utility model and good effect are: one-touch multifunctional control circuit of the present utility model is by carrying out ingehious design to circuit structure, a button only need be set can be realized switching on and shutting down control and reset control dual-use function system, not only simplify circuit structure, be convenient to the Miniaturization Design of product, and facilitated user's control operation, promote consumer's experience.In addition, by design NFC circuit and power charging circuit in circuit system, thereby in making electronic product there is NFC function and rechargeable function, realize NFC arousal function and the charging power up function of system, greatly promoted diversity and the dirigibility of electronic product start-up mode.Described one-touch multifunctional control circuit is applied in the circuit design of dressing electronic product, not only can reduce small product size, simplify consumer's operation, facilitate waterproofing design, and after product shutdown, system can auto-breaking, and the consumption that can save to greatest extent thus battery electric quantity extends service time of battery.
Read by reference to the accompanying drawings after the detailed description of the utility model embodiment, other features of the present utility model and advantage will become clearer.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of a kind of embodiment of the one-touch multifunctional control circuit that proposes of the utility model;
Fig. 2 is the physical circuit schematic diagram of a kind of embodiment of the one-touch multifunctional control circuit that proposes of the utility model;
Fig. 3 is the physical circuit schematic diagram of another embodiment of the one-touch multifunctional control circuit that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in more detail.
The one-touch multifunctional control circuit of the present embodiment is in order to simplify circuit structure, reduce the use of mechanically actuated parts as far as possible, in circuit design process, adopt one-touch design proposal, utilize the compatible completion system switching on and shutting down control of a button and system reset control dual-use function, thereby in facilitating product Miniaturization Design and waterproofing design, can make user's control operation simplify as much as possible, improve user's experience.
In order to realize above-mentioned purpose of design, the present embodiment has designed key circuit, reset circuit, power control circuit, processor and the power supply for each electricity consumption load supplying in circuit system in circuit system, shown in Figure 1.Wherein, in key circuit, a button can be only set, be used for switching on and shutting down control and the system reset control of system.Described key circuit is connected with power control circuit and reset circuit respectively, trigger button user and carry out switching on and shutting down whens operation, power control circuit is according to the folding condition of button, connect or cut off the current supply circuit of processor, for example power supply connects the power supply transmission line of processor energization pins, and the power supply of processor is carried out to break-make control.Processor is powering on after operation, and other functional circuits in control system start operation, the start process of completion system circuit, response user's start operation.In the process of system operation, if when the situations such as crashing, system works is abnormal appears in processor need to reset, user can adopt long by the mode of described button, start reset circuit and generate control signal, transfer to power control circuit, cut off the mode of processor power supply by the short time, control system circuit power-off reset.
In the process of circuit system start operation, utilize processor to detect in real time the folding condition of described button, if detect, the button short time is closed or trigger for a long time the closed time while exceeding the unused time of setting, can produce and export off signal to power control circuit by processor, control the current supply circuit that power control circuit cuts off processor, realize the power-off operation to circuit system.
Meanwhile, processor can also adopt the mode that detects button folding condition, judges whether the current control system selected pattern of starting shooting is button power on mode.
In order to improve diversity and the dirigibility of system boot control, the present embodiment also preferably further designs NFC circuit and power charging circuit in circuit system, connect respectively described power control circuit, and then in completing NFC function and charge function, realize NFC arousal function and the charging power up function of system, shown in Figure 1.
Below in conjunction with Fig. 2, Fig. 3, physical circuit assembling structure and the principle of work thereof of the one-touch multifunctional control circuit that the present embodiment is proposed are at length set forth.
Shown in Figure 2, in the key circuit of the present embodiment, be mainly designed with button SW1 and the first current-limiting resistance R1.Described button SW1 preferably adopts without pressing and keeps the mechanical key of function to carry out the specific design of circuit system.By one end ground connection of described button SW1, the other end connects power supply by the first current-limiting resistance R1.For portable type electronic product or wearable electronic product, described power supply can specifically refer to that battery BAT(preferably adopts rechargeable battery), the direct supply VBAT that utilizes battery BAT output powers for circuit system.
In the power control circuit of the present embodiment, mainly be designed with two on-off elements, one is the second switch element Q2 with low level on state characteristic, such as P channel MOS tube or positive-negative-positive triode etc., be connected between direct supply VBAT and the energization pins VDD of processor MCU, for the current supply circuit of processor MCU is carried out to break-make control; Another is the 3rd on-off element Q3 with high level on state characteristic, such as N-channel MOS pipe or NPN type triode etc., for in the time that triggering button SW1 starts shooting operation, after button SW1 lifts, maintain second switch element Q2 and keep conducting state, make battery BAT can be continuously processor MCU power supply.
Specifically, the switch ways of described second switch element Q2 can be connected between described direct supply VBAT and the energization pins VDD of processor MCU, control end connects the switch ways of the 3rd on-off element Q3 on the one hand by divider resistance R7, and by the switch ways ground connection of the 3rd on-off element Q3; Connect on the other hand the intermediate node of described button SW1 and the first current-limiting resistance R1, triggering button SW1 closure, when the start of control system circuit, utilize the closure state of button SW1, control the conducting of second switch element Q2 low level, and then connect the current supply circuit of processor MCU, make the processor MCU operation that powers on.In order to decontrol user after button SW1, processor MCU still can continue to power on, keep running status, a wherein road I/O mouth of selection processor MCU detects pin SWITCH_DETECTION as button, the intermediate node that connects described button SW1 and the first current-limiting resistance R1 by resistance R 5, detects the folding condition of button SW1.If after processor MCU powers on, while detecting that by its button detection pin SWITCH_DETECTION button SW1 is closed, be that processor MCU detects when its button detection pin SWITCH_DETECTION is low level, judge that this time start is button power on mode, generate the starting-up signal of high level, export the control end of the 3rd on-off element Q3 to by the power supply control pin POWER_CONTROL of processor MCU, control second switch element Q2 and maintain conducting state by controlling the 3rd on-off element Q3 conducting, and then guarantee that battery BAT can be continuously processor MCU power supply, guarantee that circuit system continues energising operation.
Below take P channel MOS tube as described second switch element Q2, N-channel MOS pipe is as the 3rd described on-off element Q3 as example, concrete assembling structure and the principle of work thereof of power control circuit are elaborated.
Shown in Figure 2, by the positive pole of the source electrode connection battery BAT of P channel MOS tube Q2, drain electrode connects the energization pins VDD of processor MCU, and grid connects the source electrode of himself by divider resistance R6, and passes through the drain electrode that divider resistance R7 connects N-channel MOS pipe Q3.The grid of described N-channel MOS pipe Q3 is connected to the power supply control pin POWER_CONTROL of processor MCU, source ground, drain electrode connects the anode of the second diode D2, and connects the intermediate node of button SW1 and the first current-limiting resistance R1 by the negative electrode of the second diode D2.
The principle of work of described power control circuit is: when circuit system is during in off-mode, if user pushes button, SW1 makes its closure, and now the second diode D2 conducting drags down the grid potential of P channel MOS tube Q2, makes P channel MOS tube Q2 saturation conduction.After P channel MOS tube Q2 conducting, the direct supply VBAT exporting by battery BAT transfers to the energization pins VDD of processor MCU via the source electrode of P channel MOS tube Q2 and drain electrode, for processor MCU provides its required working power, makes the processor MCU operation that powers on.
Before button SW1 unclamps, processor MCU detects the low and high level state of its button detection pin SWITCH_DETECTION, and described button detects pin SWITCH_DETECTION connects described button SW1 and the first current-limiting resistance R1 intermediate node by resistance R 5.If it is low that button detects the current potential of pin SWITCH_DETECTION, represent button SW1 closure, decision-making system will enter open state, now processor MCU is by the starting-up signal of its power supply control pin POWER_CONTROL output high level, transfer to the grid of N-channel MOS pipe Q3, control N-channel MOS pipe Q3 saturation conduction, the grid potential that maintains P channel MOS tube Q2 is low level.Now, even if user unclamps button SW1, button SW1 is disconnected, due to N-channel MOS pipe Q3 saturation conduction, therefore the grid potential of P channel MOS tube Q2 is still low, and P channel MOS tube Q2 keeps conducting state, continues the current supply circuit of connected processor MCU, guarantee processor MCU continuous service, and then control system circuit is in start running status.
After button SW1 disconnects, the second diode D2 oppositely ends, and can avoid thus the electric current of exporting by battery BAT to transfer to N-channel MOS pipe Q3 via current-limiting resistance R1, and then in guaranteeing the correct flow direction of electric current, reduces the Overall Power Consumption of system.
At circuit system under open state, if user needs control system shutdown, can adopt short by or longly carry out power-off operation by the mode of button SW1.When processor MCU is under running status, the current potential that its button detection pin SWITCH_DETECTION detected is low level by high level saltus step, and keep the low level time very short (being that user is short in button SW1 shutdown) or keep the shutdown triggered time t1(that the low level time exceedes setting to shut down by button SW1 with the head of a household) time, judge that user has carried out power-off operation.Now, processor MCU, by the off signal of its power supply control pin POWER_CONTROL output low level, transfers to the grid of N-channel MOS pipe Q3, controls N-channel MOS pipe Q3 cut-off.When user unclamps after button SW1, the grid potential of P channel MOS tube Q2 becomes high level, and P channel MOS tube Q2 proceeds to cut-off state, cuts off the current supply circuit of processor MCU, makes processor MCU power-off, and circuit system is out of service, enters off-mode.
More than realize the keyswitch machine function of circuit system.
In the reset circuit of the present embodiment, be provided with the first on-off element Q1 and capacitor charge and discharge circuit, described capacitor charge and discharge circuit is connected to the intermediate node of described button SW1 and the first current-limiting resistance R1, according to the folding condition of button SW1, the capacitor C 1 in capacitor charge and discharge circuit is discharged and recharged to control.Described capacitor C 1 is connected to the first on-off element Q1, generate control signal by controlling the first on-off element Q1 break-make, control the current supply circuit of power control circuit cut-out processor MCU, make processor MCU power-off reset; Or the current state that keeps power control circuit, does not produce any impact to the work at present state of circuit system.
As a kind of preferred design of the present embodiment, described the first on-off element Q1 preferably adopts a P channel MOS tube to carry out the specific design of circuit system.In described capacitor charge and discharge circuit, except being provided with described capacitor C 1, be also provided with the first diode D1 and discharge resistance R4, shown in Figure 2.By the intermediate node of button SW1 described in the anodic bonding of described the first diode D1 and the first current-limiting resistance R1, negative electrode connects the positive pole of capacitor C 1, the minus earth of capacitor C 1, and discharge resistance R4 is connected in parallel on the two ends of described the first diode D1.The grid of described P channel MOS tube Q1 is connected to the positive pole of capacitor C 1, source electrode connects the positive pole of battery BAT, and drain electrode connects the grid of P channel MOS tube Q2 in power control circuit.
When button SW1 is during in off-state, the first diode D1 conducting, the direct supply VBAT exporting by battery BAT charges to capacitor C 1 via the first diode D1 of the first current-limiting resistance R1 and conducting, the grid potential that makes P channel MOS tube Q1 is high level, control P channel MOS tube Q1 cut-off, power control circuit is not produced to any impact.In the time that deadlock or circuit system operation irregularity appear in processor MCU, user can adopt long by the mode control system circuit reset of described button SW1.Specifically, when with the head of a household during by described button SW1 (compressing time is set as t2, and the value of t2 should be determined according to the discharge time of capacitor C 1, and t2<t1), the electric charge in capacitor C 1 is released over the ground by discharge resistance R4 and button SW1.Along with the carrying out of electric discharge, the lower voltage of capacitor C 1, makes the grid voltage of P channel MOS tube Q1 reduce and proceed to conducting state.When after P channel MOS tube Q1 conducting, direct supply VBAT transfers to the grid of P channel MOS tube Q2 by P channel MOS tube Q1, make the grid voltage of P channel MOS tube Q2 raise and enter cut-off state and then the current supply circuit that cuts off processor MCU, make the power down of processor MCU short time, system reset.
Certainly, the on-off element that described the first on-off element Q1 also can select positive-negative-positive triode etc. to have low level on state characteristic carries out the specific design of circuit system, the present embodiment be not limited in above for example.
In addition, in order to make system have NFC function, the present embodiment is also designed with NFC circuit in described circuit system, is mainly made up of NFC coil NFC_ANTENNA and connected NFC chip U1, for carrying out short haul connection with outside NFC equipment, realize data transmission.
The present embodiment, in order to improve the dirigibility of circuit system start-up mode, is set up the parts such as the second current-limiting resistance R2, the 3rd diode D3 in described NFC circuit, and cooperation processor MCU realizes the NFC arousal function of system, shown in Figure 2.The detection pin FD of NFC chip U1 is connected to the positive pole of battery BAT by the second current-limiting resistance R2, and connect described power control circuit by the 3rd diode D3, for example the negative electrode of the 3rd diode D3 is connected to the detection pin FD of NFC chip U1, the intermediate node of anodic bonding N-channel MOS pipe Q3 and divider resistance R7.
In the time that NFC chip U1 senses that by NFC coil NFC_ANTENNA outside has NFC equipment to approach, by NFC coil NFC_ANTENNA induction output AC pulse signal, transfer to described NFC chip U1.There is mistake problem of start-up for fear of circuit system, described NFC chip U1 is preferably set in the time detecting that the effective impulse of exporting by NFC coil NFC_ANTENNA reaches setting number, for example, when 50 pulses, judge that the current user of being is using NFC equipment to scan native system, rather than close momently.Now, it is low level that NFC chip U1 puts its detection pin FD, makes the 3rd diode D3 conducting, and then drag down the grid potential of P channel MOS tube Q2 in power control circuit, make P channel MOS tube Q2 saturation conduction, connect the current supply circuit of processor MCU, make the processor MCU operation that powers on.After processor MCU powers on, detect the low and high level state of its NFC detection pin NFC_DETECTION, the NFC of set handling device MCU detects the detection pin FD that pin NFC_DETECTION directly connects or connect by resistance R 3 NFC chip U1.When processor MCU detects that it is low level that its NFC detects pin NFC_DETECTION, and button is when detecting pin SWITCH_DETECTION and being high level, judge that this time start is NFC power on mode, and then the power supply control pin POWER_CONTROL that passes through processor MCU exports the starting-up signal of high level, control N-channel MOS pipe Q3 saturation conduction, then the grid potential that maintains P channel MOS tube Q2 keeps low level, the start process of completion system circuit, the NFC that realizes circuit system wakes power up function up.
After this, if user thinks control system circuit shutdown, can adopt short by or long by the mode of button SW1, circuit system is carried out to power-off operation.
In order further to make circuit system possess charging power up function, the present embodiment further arranges the bleeder circuit being made up of resistance R 8, R9 in the power charging circuit of system, and the charging terminal CHARGING of connected system circuit is shown in Figure 3.In the time that external power source is the battery BAT charging accumulation of energy in circuit system by charging terminal CHARGING, the charging voltage of inputting by charging terminal CHARGING is simultaneously via resistance R 8, after R9 dividing potential drop, export respectively the control end (for example grid of N-channel MOS pipe Q3) of the 3rd on-off element and the charging of processor MCU to and detect pin CHARGE_DETECTION, drag down on the one hand the grid potential of P channel MOS tube Q2 by controlling N-channel MOS pipe Q3 conducting, make P channel MOS tube Q2 conducting, connect the current supply circuit of processor MCU, control system circuit start operation, be high level by the charging detection pin CHARGE_DETECTION that puts processor MCU on the other hand, and then realize the detection of processor MCU to current power on mode.That is, when processor MCU powers on after operation, if detect, its charging detects pin CHARGE_DETECTION is high level, when its button detection pin SWITCH_DETECTION is also high level, judges that this time start is as charging power on mode.
In order to guarantee the correctness of current direction, the present embodiment is also provided with the 4th diode D4 and the 5th diode D5 in described circuit system, shown in Figure 3.By the power supply control pin POWER_CONTROL of the anodic bonding processor MCU of the 4th diode D4, negative electrode connects the grid of N-channel MOS pipe Q3, can guarantee that thus the switching on and shutting down signal of exporting by the power supply control pin POWER_CONTROL of processor MCU can not be subject to the impact of charging voltage.The charging that the anode of the 5th diode D5 is connected to processor MCU by resistance R 8 detects pin CHARGE_DETECTION, negative electrode connects the grid of N-channel MOS pipe Q3, avoid thus the high level starting-up signal of exporting by the power supply control pin POWER_CONTROL of processor MCU to transfer to mistakenly charging detection pin CHARGE_DETECTION, cause the erroneous judgement of processor MCU to system state of charge.
In the present embodiment, described the first diode D1 preferably adopts the switching diode of low reverse current leakage, the diode that for example model is CMAD6001, effect is after button SW1 unclamps, rapid charge loop is provided, while preventing consecutive intervals by button SW1, causes system reset.
Diode D2, D3, D4, D5 preferably adopt schottky diode, four switching diode devices that for example model is 1PS79SB30; Or the second diode D2 and the 3rd diode D3 are replaced to the duodiode device of a common cathode, the duodiode device that the 4th diode D4 and the 5th diode D5 are replaced to a common anode utmost point, can meet the designing requirement of circuit system equally.In the present embodiment, the effect of described the second diode D2 and the 3rd diode D3 is to prevent that NFC detection signal and button trigger pip from producing phase mutual interference, and makes processor MCU can judge exactly the detection pin FD of NFC chip U1 and the state of button SW1.The effect of the 4th diode D4 and the 5th diode D5 is to prevent that charging voltage from impacting processor MCU, and makes processor MCU can judge exactly charged state.
The one-touch multifunctional control circuit of the present embodiment is applied in and is dressed in electronic product, can realize start, shutdown, reset function by a button, and can wake start up by NFC equipment, and there is charging power up function, greatly facilitate user's routine use.Meanwhile, the power-off of system closedown back loading, can farthest save battery consumption thus, extends the serviceable life of battery.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art make in essential scope of the present utility model, also should belong to protection domain of the present utility model.
Claims (10)
1. an one-touch multifunctional control circuit, comprises power supply, key circuit, power control circuit, reset circuit and processor; It is characterized in that: in described key circuit, be provided with a button and the first current-limiting resistance, described button one end ground connection, the other end connects described power supply by the first current-limiting resistance; Described button is connected power control circuit with the intermediate node of the first current-limiting resistance, and described power control circuit connects or cut off the current supply circuit of processor according to the folding condition of button; In described reset circuit, be provided with the first on-off element and capacitor charge and discharge circuit, described capacitor charge and discharge circuit connects the intermediate node of described button and the first current-limiting resistance, according to the folding condition of button, the electric capacity in capacitor charge and discharge circuit is discharged and recharged to control, described electric capacity connects the first on-off element, the first on-off element break-make generation control signal is controlled in discharging and recharging of described electric capacity, controls power control circuit and cuts off the current supply circuit of processor or keep current state.
2. one-touch multifunctional control circuit according to claim 1, is characterized in that: in described power control circuit, be provided with second switch element and the 3rd on-off element; The conducting of described second switch element low level, its switch ways is connected between power supply and the energization pins of processor, and control end passes through the switch ways ground connection of the 3rd on-off element, and connects the intermediate node of described button and the first current-limiting resistance; The button of described processor detects the intermediate node that pin connects described button and the first current-limiting resistance, detects the folding condition of button, and then generation switching on and shutting down signal exports the control end of the 3rd on-off element to.
3. one-touch multifunctional control circuit according to claim 2, it is characterized in that: described the 3rd on-off element high level conducting, between its switch ways and the control end of second switch element, be connected with divider resistance, described button is connected the intermediate node of the switch ways of described divider resistance and the 3rd on-off element with the intermediate node of the first current-limiting resistance.
4. one-touch multifunctional control circuit according to claim 3, is characterized in that: described the first on-off element low level conducting, and its control end connects described electric capacity, and switch ways is connected between power supply and the control end of second switch element.
5. one-touch multifunctional control circuit according to claim 4, it is characterized in that: in described capacitor charge and discharge circuit, be also provided with the first diode and discharge resistance in parallel, the intermediate node of button and the first current-limiting resistance described in the anodic bonding of described the first diode, negative electrode connects the control end of described electric capacity and the first on-off element.
6. one-touch multifunctional control circuit according to claim 5, is characterized in that: described the first on-off element is a P channel MOS tube, and described second switch element is the 2nd P channel MOS tube, and described the 3rd on-off element is N-channel MOS pipe; The grid of a described P channel MOS tube connects described electric capacity, and source electrode connects described power supply, and drain electrode connects the grid of the 2nd P channel MOS tube; The source electrode of described the 2nd P channel MOS tube connects described power supply, and drain electrode connects the energization pins of described processor, and grid connects the drain electrode of N-channel MOS pipe by described divider resistance, and connects described power supply by another divider resistance; The source ground of described N-channel MOS pipe, grid connects the pin of described processor output switch machine signal; The drain electrode of described N-channel MOS pipe connects the anode of the second diode, and the negative electrode of the second diode connects the intermediate node of described button and the first current-limiting resistance.
7. according to the one-touch multifunctional control circuit described in any one in claim 1 to 6, it is characterized in that: in described one-touch multifunctional control circuit, be also provided with NFC circuit; Described NFC circuit is in the time having sensed that NFC equipment approaches, the detection pin of putting NFC circuit is low level, described detection pin connects described power supply by the second current-limiting resistance, and be connected with the NFC detection pin of processor and the negative electrode of the 3rd diode respectively, the anodic bonding power control circuit of the 3rd diode, controls power control circuit and cuts off the current supply circuit of processor or keep current state.
8. according to the one-touch multifunctional control circuit described in any one in claim 2 to 6, it is characterized in that: in described one-touch multifunctional control circuit, be also provided with power charging circuit, comprise charging terminal and bleeder circuit; The charging voltage of inputting by described charging terminal via bleeder circuit dividing potential drop after, export respectively described the 3rd control end of on-off element and the charging of processor to and detect pin.
9. one-touch multifunctional control circuit according to claim 8, it is characterized in that: the control end of described the 3rd on-off element connects respectively the pin of processor output switch machine signal by the 4th diode, the charging that connects processor by the 5th diode detects pin.
10. dress an electronic product, it is characterized in that: be provided with the one-touch multifunctional control circuit as described in any one claim in claim 1 to 9, described power supply is battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080543.4U CN203705875U (en) | 2014-02-25 | 2014-02-25 | One-button multifunctional control circuit and wearable electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420080543.4U CN203705875U (en) | 2014-02-25 | 2014-02-25 | One-button multifunctional control circuit and wearable electronic product |
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| Publication Number | Publication Date |
|---|---|
| CN203705875U true CN203705875U (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420080543.4U Withdrawn - After Issue CN203705875U (en) | 2014-02-25 | 2014-02-25 | One-button multifunctional control circuit and wearable electronic product |
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| CN (1) | CN203705875U (en) |
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| CN103809492A (en) * | 2014-02-25 | 2014-05-21 | 青岛歌尔声学科技有限公司 | One-key type multifunctional control circuit and wearable electronic product |
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| CN110213867A (en) * | 2019-05-31 | 2019-09-06 | 深圳市中昌探伤器材有限公司 | A kind of multifunction switch circuit, Switching method and magnetic powder flaw detector |
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| CN110989813B (en) * | 2019-11-27 | 2021-06-18 | 北京兆维自服装备技术有限公司 | Power supply control device and method and electronic equipment |
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