CN105425927B - More key reset circuits and electronic product with reset key - Google Patents
More key reset circuits and electronic product with reset key Download PDFInfo
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- CN105425927B CN105425927B CN201511002172.3A CN201511002172A CN105425927B CN 105425927 B CN105425927 B CN 105425927B CN 201511002172 A CN201511002172 A CN 201511002172A CN 105425927 B CN105425927 B CN 105425927B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/24—Resetting means
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Abstract
The invention discloses a kind of more key reset circuits and with the electronic product of reset key, it is provided with N number of reset key, N number of current-limiting resistance and N number of diode, the N is the positive integer greater than 1；N number of reset key is connected with N number of current-limiting resistance one-to-one correspondence, forms N series arm, and the N series arm is connected between power supply and ground wire；The anode of N number of diode is connected to the intermediate node of reset key and current-limiting resistance in N series arm correspondingly, and the cathode of N number of diode connects reset signal output end.The present invention on electronic product by being arranged multiple reset keys, when all reset keys are pressed simultaneously, system just executes reset operation, since electronic product is in normal use process, the probability that multiple reset keys are pressed simultaneously is extremely low, therefore, system misses reset issues caused by can solving substantially because of user misoperation, improves system reliability of operation.
Description
Technical field
The invention belongs to electronic circuit technology fields, are related to a kind of reset circuit, specifically, being to be related to a kind of utilize again
Position key reset to electronic product the circuit design of operation.
Background technique
Reset circuit is that one kind is widely used in electronic product, is specially set to improve electronic product reliability of operation
The tandem circuit of meter.Many electronic products will appear the case where Cartridge dead (crash) once in a while in the process of running, encounter this
When situation, if can only take without manipulable hardware reset key or other resetting apparatuses and directly power off or tear open machine
The mode reprocessed resets system software, makes system roll-back, not only troublesome in poeration, but also will cause the time
On unnecessary waste.Therefore, it is particularly necessary that reset circuit is designed on electronic product.
Existing reset circuit is mostly key reset circuit, that is, independent reset key is designed on electronic product, specially
Door is for resetting operation.This reset key is usually only arranged one, when system is stuck, by pressing the reset key,
Can Control System Software reset, restart operation.This key reset circuit design method is used on electronic product, often
There is electronic product in normal course of operation since user accidentally presses reset key, and leads to system software mistakenly
The case where into reset state, to affect the normal operation of electronic product and the usage experience of user.
In order to avoid the maloperation of user, reset key is embedded in the shell of product by some electronic products completely, i.e.,
Design resets pin hole on the shell of electronic product, and reset key is built in and is resetted in pin hole, passes through answering in triggering pin hole
Position key, control system reset.This design method is by being set to the not accessible position of user for reset key, although can
To solve the problems, such as accidentally to reset, but user it is each execute reset operation when, it is necessary to find a kind of needlelike object extend into it is multiple
In the pin hole of position, reset key can be just touched, executes and resets operation, this undoubtedly increases user and executes the difficulty for resetting operation.
Summary of the invention
The purpose of the present invention is to provide a kind of more key reset circuits, while facilitating user to execute reset operation,
The probability for accidentally resetting and occurring can be reduced as much as possible.
In order to solve the above technical problems, the present invention is achieved by the following scheme:
A kind of more key reset circuits, are provided with N number of reset key, N number of current-limiting resistance and N number of diode, and the N is big
In 1 positive integer；N number of reset key is connected with N number of current-limiting resistance one-to-one correspondence, forms N series arm, the N item
Series arm is connected between power supply and ground wire；The anode of N number of diode is connected to correspondingly in N series arm
The cathode of the intermediate node of reset key and current-limiting resistance, N number of diode connects reset signal output end.
Further, when the current-limiting resistance is connected between the power supply and reset key, the reset key is connected
When between current-limiting resistance and ground wire；The reset key should select the normally opened key of non-self-lock-ing, using this circuit design side
When formula, the reset signal low level exported by the reset signal output end is effective.And when the reset key is connected to institute
It states between power supply and current-limiting resistance, when the current-limiting resistance is connected between reset key and ground wire；The reset key should select
With the closed button of non-self-lock-ing, when using this circuit design mode, believed by the reset that the reset signal output end exports
Number low level is effective.
In order to eliminate the issuable malfunction of key jitter, the reset signal output end is preferably passed through into filter capacitor
Ground connection, to filter out the shake waveform in reset signal, it is ensured that stablized by the reset signal that reset signal output end exports.
In order to guarantee the balance of N circuit branch work, N number of reset key preferably uses the machinery of same model
Key, N number of current-limiting resistance preferably use the resistive element of similar resistance, and N number of diode preferably uses same model
Switching diode.
Further, the reset pin that the reset signal output end is connected to a control unit, to described control unit
Output reset signal, to control described control unit reset.
Based on above-mentioned more key reset circuits, the invention also provides a kind of electronic product with reset key, settings
There are N number of reset key, N number of current-limiting resistance and N number of diode, the N is the positive integer greater than 1；N number of reset key and N
A current-limiting resistance corresponds series connection, forms N series arm, the N series arm be connected to power supply and ground wire it
Between；The anode of N number of diode is connected to the intermediate node of reset key and current-limiting resistance in N series arm, N correspondingly
The cathode of a diode connects reset signal output end.
Preferably, as the N=2, i.e., in setting on electronic product, there are two when reset key, it is contemplated that user is in hand
When holding electronic product, finger can touch the opposite sides of electronic product simultaneously, if two reset keys are laid in electronic product
Same side on or opposite two sides for the electronic product that is placed on, then probably will appear false triggering.In consideration of it,
Reset key described in two is preferably placed on adjacent two sides on the shell of electronic product by the present invention, is missed with reducing
The probability of operation.
As the N > 2, i.e., be arranged on electronic product there are three or when three or more reset keys, due to resetting
The quantity of key is more, even if user's handheld electric products, inadvertently presses the probabilities of all reset keys simultaneously also very
Small, therefore, for facilitating user to execute the considerations of resetting operation, N number of reset key is preferably placed in electronics by the present invention
On the shell of product on two opposite sides, in order to user's manipulation.
Preferably, the electronic product is portable electronic product, and the power supply is the battery output in electronic product
DC power supply generates the DC power supply conversion that battery exports via the power circuit in electronic product.
Compared with prior art, the advantages and positive effects of the present invention are: the present invention is more by being arranged on electronic product
A reset key, when all reset keys are pressed simultaneously, system just executes reset operation, due to electronic product
In normal use process, the probability that multiple reset keys are pressed simultaneously is extremely low, therefore can solve substantially because of user misoperation
Caused by system miss reset issues, while improving system operation reliability, also solve system software it is stuck after repair
Multiple problem.In addition, more key reset circuits design of the invention is simple, and it is at low cost, it is easy to accomplish, it can be square according to actual needs
Just the quantity for increasing or deleting reset key, be suitably applied in operation button in need carry out the electronics of hardware reset and produce
In product design, to improve the usage experience of user.
After the detailed description of embodiment of the present invention is read in conjunction with the figure, the other features and advantages of the invention will become more
Add clear.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of embodiment of the tandem circuit of more key reset circuits proposed by the invention；
Fig. 2 is that there are three a kind of implementations of the reset circuit of reset key for the tool based on tandem circuit shown in FIG. 1 design
The circuit diagram of example；
Fig. 3 is a kind of circuit diagram of embodiment of the reset circuit based on the design of two reset keys；
Fig. 4 is a kind of circuit diagram of embodiment of the reset circuit based on the design of four reset keys；
Fig. 5 is the circuit theory of another embodiment of the tandem circuit of more key reset circuits proposed by the invention
Figure；
Fig. 6 is that there are three a kind of implementations of the reset circuit of reset key for the tool based on tandem circuit shown in fig. 5 design
The circuit diagram of example；
Fig. 7 is layout position illustration of two reset keys shown in Fig. 3 on electronic product；
Fig. 8 is layout position illustration of three reset keys of Fig. 2 or shown in fig. 6 on electronic product.
Specific embodiment
A specific embodiment of the invention is described in more detail with reference to the accompanying drawing.
The present embodiment is directed to the electronic product using the design of key resetting technique, proposes a kind of more key resetting techniques,
By laying multiple reset keys on electronic product, and designs reset circuit and only all pressed in multiple reset keys
Effective reset signal will just be exported when lower, Control System Software reset is restarted, missed it is possible thereby to which user is greatly reduced
The probability of operation solves the problems, such as that system software accidentally resets.
In order to allow different electronic products easily to increase or delete reset key according to the actual needs of itself
Quantity, the present embodiment fully considers the scalability of circuit design when designing the reset circuit, using multiple based on one
The mode of position button design tandem circuit, to achieve the purpose that simplified circuit design.
Below by two specific embodiments, to the tandem circuit and more pressing based on tandem circuit design
The physical circuit of key reset circuit designs and working principle is described in detail.
Embodiment one
Fig. 1 shows one of design method of tandem circuit.In Fig. 1, S is reset key, it is preferred to use is not had
The mechanical switch open in usual (that is, the normally opened key of non-self-lock-ing) of self-locking function carries out circuit design；R is current-limiting resistance；D is two poles
Pipe.It after the reset key S is connected with current-limiting resistance R, is connected between power supply VCC and ground wire, the anode of diode D is connected
Be connected to the intermediate node of reset key S Yu current-limiting resistance R, the cathode of diode D connects reset signal output end RESET, with
In output reset signal.
As a kind of preferred design of the present embodiment, the current-limiting resistance R is preferably connected to power supply VCC and is resetted
Between key S, and reset key S is connected between current-limiting resistance R and ground wire, as shown in Figure 1.When reset key S is not pressed
When, power supply VCC acts on the anode of diode D by current-limiting resistance R, and control diode D conducting, it is invalid for setting reset signal
High level state.When reset key S is pressed, the anode potential of diode D is pulled down to ground, and diode D reversely ends, sets
Reset signal is effective low level state.
In the present embodiment, the power supply VCC is DC power supply, can be provided by the power circuit in electronic product.It is right
It, can be direct by the battery in electronic product for electronic product is the portable electronic product such as mobile phone, PAD, smartwatch
The DC power supply VCC is provided, the DC power supply that battery exports can also be carried out via the power circuit in electronic product
It is provided after conversion.The present embodiment is to this without concrete restriction.
It can be to figure for the electronic product for needing to be arranged three reset keys based on tandem circuit shown in FIG. 1
Tandem circuit shown in 1 carries out three tunnel extensions, forms three key reset circuits as shown in Figure 2.In Fig. 2, S1, S2, S3 tri-
A non-self-lock-ing reset key open in usual；R1, R2, R3 are corresponding concatenated with three described reset keys S1, S2, the S3 respectively
Current-limiting resistance；D1, D2, D3 are the diode to connect one to one respectively with the intermediate node of three series arms, two pole
The cathode of pipe D1, D2, D3 are connected to reset signal output end RESET.The reset signal output end RESET and electronics are produced
Control unit connection in product, to the reset pin output reset signal of control unit, to control institute when system software is stuck
State control unit reset.
The electronic product designed using three key reset circuits as shown in Figure 2, low level are resetted, and working principle is such as
Under:
When three reset keys S1, S2, S3 being arranged on electronic product are not pressed, diode D1, D2, D3 are led
Logical, at this point, the current potential of reset signal output end RESET is high level, electronic product does not execute reset operation.
When three reset keys S1, S2, S3 in Fig. 2 have any one to be pressed, when other two is not pressed, and pressed
Under the diode that is correspondingly connected with of reset key reversely end, other two diode still maintains on state, at this point, resetting letter
The current potential of number output end RESET is still high level, therefore electronic product does not execute reset operation.
When three reset keys S1, S2, S3 in Fig. 2 have any two to be pressed, and residue one is not pressed, with quilt
Two diodes that the reset key pressed is correspondingly connected with reversely end, and a remaining diode still maintains on state, this
When, the current potential of reset signal output end RESET is still high level, therefore electronic product does not execute reset operation.
When three reset keys S1, S2, S3 being arranged on electronic product are pressed, diode D1, D2, D3 are anti-
To cut-off, at this point, the jump in potential of reset signal output end RESET controls electronic product and executes at low level, i.e. effective status
Operation is resetted, the system program that control unit is run in electronic product is resetted, then when software is stuck, realizes and electronics is produced
The reparation of product.
User causes system to malfunction when pressing reset key S1, S2, S3 because of key jitter in order to prevent,
The present embodiment connects a filter capacitor C1, the filtered electrical preferably between the reset signal output end RESET and ground wire
The capacitance for holding C1 is preferably 100nF, to filter out shake waveform, guarantees the stabilization of reset signal waveform.
It is of course also possible to tandem circuit shown in FIG. 1 carry out two-way extension, with formed have two-way reset key S4,
The reset circuit of S5, as shown in Figure 3.It is equally possible that four tunnel extensions are carried out to tandem circuit shown in FIG. 1, to form tool
There is the reset circuit of four road reset key S6, S7, S8, S9, as shown in Figure 4.The tool of Fig. 3, more key reset circuits shown in Fig. 4
Body connection relationship and working principle be referred to it is above-mentioned three key reset circuit shown in Fig. 2 is specifically described, the present embodiment
Not reinflated explanation herein.
Embodiment two
Fig. 5 shows another design method of tandem circuit.In Fig. 5, S ' is reset key, it is preferred to use is not had
The normally closed type mechanical switch (that is, non-self-lock-ing closed button) of self-locking function carries out circuit design；R ' is current-limiting resistance；D ' is two poles
Pipe.It after the reset key S ' is connected with current-limiting resistance R ', is connected between power supply VCC and ground wire, by the sun of diode D '
Pole is connected to the intermediate node of reset key S ' Yu current-limiting resistance R ', and the cathode of diode D ' connects reset signal output end
RESET, to be used for output reset signal.
As a kind of preferred design of the present embodiment, the reset key S ' is preferably connected to power supply VCC and limit
Between leakage resistance R ', current-limiting resistance R ' is connected between reset key S ' and ground wire, as shown in Figure 2.When reset key S ' not
When being pressed, reset key S ' keeps normally off, and power supply VCC acts on the anode of diode D ', control by reset key S '
Diode D ' conducting processed, setting reset signal is invalid high level state.When reset key S ' is pressed, reset key S ' is disconnected
It opens, the anode potential of diode D ' is pulled down to ground by current-limiting resistance R ', and diode D ' reversely ends, and setting reset signal is to have
The low level state of effect.
It can be to figure for the electronic product for needing to be arranged three reset keys based on tandem circuit shown in fig. 5
Tandem circuit shown in 5 carries out three tunnel extensions, forms three key reset circuit as shown in FIG. 6.In Fig. 6, S1 ', S2 ', S3 ' are
The reset key of three non-self-lock-ing normally closed types；R1 ', R2 ', R3 ' are right with three reset key S1 ', S2 ', the S3 ' respectively
Answer concatenated current-limiting resistance；D1 ', D2 ', D3 ' are two poles to connect one to one respectively with the intermediate node of three series arms
Pipe, is connected to reset signal output end RESET for the cathode of three diode D1 ', D2 ', D3 '.The reset signal is defeated
Outlet RESET can be connect with the control unit in electronic product, with to the reset pin output reset signal of control unit, after
And when system software is stuck, it is resetted for controlling the system software in described control unit, restarts operation.
The electronic product designed using three key reset circuit as shown in FIG. 6, low level are resetted, and working principle is such as
Under:
When three reset key S1 ', S2 ', S3 ' being arranged on electronic product are not pressed, three reset keys
S1 ', S2 ', S3 ' are kept closed, at this point, diode D1 ', D2 ', D3 ' are connected, set reset signal output end RESET's
Current potential is high level, thus electronic product does not execute reset operation.
When in Fig. 6 three reset key S1 ', S2 ', there is any one to be pressed in S3 ', and other two is not pressed
When, i.e., one of reset key disconnects, when other two reset key is still kept closed, with the reset key being pressed
The diode being correspondingly connected with reversely ends, and other two diode remains on state.At this point, reset signal output end
The current potential of RESET is still high level, and therefore, electronic product does not execute reset operation.
When in Fig. 6 three reset key S1 ', S2 ', there are any two to be pressed in S3 ', remaining one is not pressed
When, i.e., two of them reset key disconnects, when another reset key is still kept closed, with the reset key being pressed
Two diodes being correspondingly connected with reversely end, and a remaining diode remains on state.At this point, reset signal exports
The current potential for holding RESET is still high level, and therefore, electronic product does not execute reset operation.
When three reset key S1 ', S2 ', S3 ' being arranged on electronic product are pressed, three reset keys
S1 ', S2 ', S3 ' are in off-state, at this point, the reversed cut-off of three diode D1 ', D2 ', D3 ', reset signal output end
The jump in potential of RESET controls electronic product and executes reset operation, make to control in electronic product at low level, i.e. effective status
The system program of unit operation resets, and then when software is stuck, realizes the reparation to electronic product.
Likewise, in the reset signal output end RESET it is also preferred that connecting filter capacitor C1, further to play elimination
The effect of key jitter.
Certainly, it is based on tandem circuit shown in fig. 5, two-way, four tunnels or the extension of more multichannel can also be carried out, to form tool
Have a reset circuit of the road N reset key, the specific connection relationship and working principle of circuit can refer to it is above-mentioned to shown in Fig. 6 three by
Key reset circuit illustrates, the present embodiment not reinflated explanation herein.
In order to ensure the balance of tandem circuit N number of in more key reset circuits work, N number of reset key is preferred
Using the mechanical key of same model；N number of current-limiting resistance preferably uses the resistive element of similar resistance, such as resistance value to be
The conventional resistive of 1K Ω；N number of diode preferably uses the switching diode of same model, to improve reset circuit work
The stability of work.
For further prevent user in normal use electronic product, it is not intended to N number of reset key is triggered simultaneously, is led
Electronic product is caused to miss the generation of reset case, the present embodiment also carries out installation position of N number of reset key on electronic product
Special designing.
For being only arranged for the electronic product of two reset keys, it is contemplated that user handheld electric products operate when,
Such as hand-held mobile phone communication or hand-held PAD, when seeing video, finger often touches the opposite sides of electronic product simultaneously, if will
Two reset keys are laid on the same side of electronic product or are placed on opposite two sides of electronic product, then very
It is possible that the problem of will appear false triggering.In consideration of it, the present embodiment is directed to the electronics production for being provided only with two reset keys S4, S5
Product, as shown in fig. 7, it is preferred that two neighboring side reset key S4, S5 described in two being placed on the shell of electronic product
On Bian Shang, such as the upper side edge and right edge of the electronic product that is placed in, since user carries out normal operating in handheld electric products
When, two hands hold simultaneously electronic product upside and right side probability it is almost nil, therefore, can greatly reduce and accidentally reset
Odds.
For setting there are three or the electronic product of three or more reset keys for, due to reset key quantity compared with
It is more, even if user's handheld electric products, the probabilities of all reset keys also very little is inadvertently pressed simultaneously, therefore, for
User is facilitated to execute the considerations of resetting operation, N number of reset key is preferably placed in phase on the shell of electronic product by the present embodiment
Pair two sides on, in order to user manipulation.The case where there are three reset key S1, S2, S3 such as Fig. 8 setting, can be by it
In a reset key S1 be laid on the left side of electronic product；Other two reset key S2, S3 are laid in electronic product
Right edge on, and one upper, one under, user can need to only be pressed simultaneously by the both hands of oneself whole resets by
Key S1, S2, S3 complete to reset operation.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, this technology neck
The variations, modifications, additions or substitutions that the those of ordinary skill in domain is made within the essential scope of the present invention, also should belong to this hair
Bright protection scope.
Claims (10)
1. a kind of more key reset circuits, it is characterised in that: it is provided with N number of reset key, N number of current-limiting resistance and N number of diode,
The N is the positive integer greater than 1；N number of reset key is connected with N number of current-limiting resistance one-to-one correspondence, forms N item series connection branch
Road, the N series arm are connected between power supply and ground wire；The anode of N number of diode is connected to N item correspondingly
The cathode of the intermediate node of reset key and current-limiting resistance in series arm, N number of diode connects reset signal output end.
2. more key reset circuits according to claim 1, it is characterised in that: the current-limiting resistance is connected to the power supply
Between reset key, the reset key is connected between current-limiting resistance and ground wire；The reset key is that non-self-lock-ing is normally opened
Key, the reset signal low level exported by the reset signal output end are effective.
3. more key reset circuits according to claim 1, it is characterised in that: the reset key is connected to the power supply
Between current-limiting resistance, the current-limiting resistance is connected between reset key and ground wire；The reset key is that non-self-lock-ing is normally closed
Key, the reset signal low level exported by the reset signal output end are effective.
4. more key reset circuits according to claim 1, it is characterised in that: the reset signal output end passes through filtering
Capacity earth.
5. more key reset circuits according to claim 1, it is characterised in that: N number of reset key is same model
Mechanical key, N number of current-limiting resistance be similar resistance resistive element, N number of diode be same model switch
Diode.
6. more key reset circuits according to any one of claim 1 to 5, it is characterised in that: the reset signal is defeated
Outlet connects the reset pin of a control unit, to described control unit output reset signal.
7. a kind of electronic product with reset key, it is characterised in that: be arranged just like described in any one of claims 1 to 6
More key reset circuits.
8. the electronic product according to claim 7 with reset key, it is characterised in that: the N=2, described in two
Reset key is placed on adjacent two sides on the shell of electronic product.
9. the electronic product according to claim 7 with reset key, it is characterised in that: as the N > 2, the N
A reset key is placed on opposite two sides on the shell of electronic product.
10. the electronic product according to any one of claims 7 to 9 with reset key, it is characterised in that: the electricity
Sub- product is portable electronic product, and the power supply is the DC power supply of the battery output in electronic product or produces via electronics
Power circuit in product generates the DC power supply conversion that battery exports.
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| CN201511002172.3A CN105425927B (en) | 2015-12-29 | 2015-12-29 | More key reset circuits and electronic product with reset key |
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| CN201511002172.3A CN105425927B (en) | 2015-12-29 | 2015-12-29 | More key reset circuits and electronic product with reset key |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN108491115A (en) * | 2018-03-13 | 2018-09-04 | 青岛海尔洗衣机有限公司 | Household appliance control method and household electrical appliance |
| CN110034752B (en) * | 2019-05-05 | 2023-06-13 | 厦门美图之家科技有限公司 | Face cleaner and face cleaner control method |
| CN118034472B (en) * | 2024-04-12 | 2024-06-21 | 深圳市南方智控科技有限公司 | Multi-key reset circuit |
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| CN103207655A (en) * | 2012-01-12 | 2013-07-17 | 宇龙计算机通信科技(深圳)有限公司 | Mobile terminal with reset function and reset method |
| KR20130123502A (en) * | 2012-05-03 | 2013-11-13 | 주식회사 호서텔넷 | Portable electronic device and method for reset using the same |
| CN103066969A (en) * | 2012-12-24 | 2013-04-24 | 无锡中星微电子有限公司 | Electronic equipment |
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