CN208673086U - A kind of low cost low-power consumption single-chip microcontroller timing wake-up circuit - Google Patents
A kind of low cost low-power consumption single-chip microcontroller timing wake-up circuit Download PDFInfo
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- CN208673086U CN208673086U CN201821166468.8U CN201821166468U CN208673086U CN 208673086 U CN208673086 U CN 208673086U CN 201821166468 U CN201821166468 U CN 201821166468U CN 208673086 U CN208673086 U CN 208673086U
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Abstract
The utility model discloses a kind of low cost low-power consumption single-chip microcontroller timing wake-up circuits, belong to single-chip microcontroller management circuit field, including single-chip microcontroller, resistance R1, resistance R2, capacitor C1, the single-chip microcontroller is connect with one end of resistance R1, the other end and capacitor C1 of resistance R1, resistance R2 connection, capacitor C1 is connect with ground wire with the other end of resistance R2, the utility model can make battery pack in storage state, single-chip microcontroller is with the lower failure of oscillation work status of power consumption, it is worked by way of entering back into failure of oscillation state after timing wake-up is run, power consumption of the single-chip microcontroller in failure of oscillation can be made lower than 1uA or less, static state consumption electric current is very low, it is very low with cost, scheme is simple, the advantages of being easily achieved.
Description
Technical field
The utility model relates to single-chip microcontrollers to manage field of circuit technology, specially a kind of low cost low-power consumption single-chip microcontroller timing
Wake-up circuit.
Background technique
Single-chip microcontroller (Microcontrollers) is a kind of IC chip, is using very large scale integration technology
The central processor CPU with data-handling capacity, random access memory ram, read only memory ROM, a variety of I/O mouthfuls and interruptions
The functions such as system, timer/counter (may further include display driver circuit, pulse-width modulation circuit, analog multiplexer,
The circuits such as A/D converter) it is integrated into the small and perfect microcomputer system constituted on one piece of silicon wafer, in Industry Control
Field is widely applied.
Lithium battery have operating voltage is high, small in size, light weight, energy height, memory-less effect, pollution-free, self discharge is small,
The advantages of having extended cycle life.Therefore, in daily life, more and more electronic products are powered using lithium ion battery.
Li-ion batteries piles usually use single-chip microcontroller internal core control chip.Existing lithium ion battery management system
It is middle when being controlled using single-chip microcontroller, it to save method used in battery drain is usually that single-chip microcontroller work is allowed to exist under storage state
The sleep state of low-power consumption, can be with 10uA since the internal crystal oscillator of single-chip microcontroller at this time is also working although power consumption stream can be smaller
The current work of~100uA and the electricity for continuing to consume battery is consuming always internal cell since it is long-term work
Electricity the battery inside electronic product can be made to lead because of the power consumption of long-time low current if stored in warehouse for a long time
Cause overdischarge, make internal cell damage or product store for a long time after can not normal boot-strap deposited for a long time so that product is placed in warehouse
It is charged on a regular basis when storage to safeguard, increases many maintenance costs.
Utility model content
The purpose of this utility model is to provide a kind of low cost low-power consumption single-chip microcontroller timing wake-up circuits, can make single-chip microcontroller
Power consumption in failure of oscillation is lower than 1uA hereinafter, having that cost is very low, scheme is simple and the advantages of being easily achieved, and solves existing lithium
The problem for needing to be charged on a regular basis, maintenance cost is high when ion battery group maintenance.
To achieve the above object, the utility model provides the following technical solutions: a kind of low cost low-power consumption single-chip microcontroller timing
Wake-up circuit, including single-chip microcontroller, resistance R1, resistance R2, capacitor C1, the single-chip microcontroller are connected by one end of pin and resistance R1
It connects, the other end of resistance R1 is connect with capacitor C1, resistance R2, and capacitor C1 is connect with ground wire with the other end of resistance R2.
The resistance R1 can be omitted.
The resistance R2 is big valued resistor, the value of the value specific resistance R1 orders of magnitude several greatly.
The single-chip microcontroller is the S3F9454 single-chip microcontroller of Samsung.
The pin is the I/O port with interruption.
Compared with prior art, the beneficial effects of the utility model are as follows:
1, the utility model only includes three electronic components: resistance R1, resistance R2, capacitor C1, simple with structure,
Advantage easy to use, easy to maintain, low in cost.
2, the failure of oscillation state that single-chip microcontroller enters very low-power consumption after normal operation may be implemented in the utility model setting, passes through
Single-chip microcontroller is waken up with failing edge interrupt mode after a period of time delay and is again introduced into normal operating condition, makes product during storage
The discontinuous operation state that may operate in very low consumption electric current, due to static power consumption in battery powered electronics applications
It is very low, make product battery drain very little in the power-offstate, product can store long time, reduce when product stores
Maintenance cost.
3, the utility model timing wake-up circuit can also be used as single-chip microcontroller hardware watchdog to be applied, and circuit forms
Simply, cost is very low, there is good practicability and economy.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the novel circuit diagram including occurrence of this reality；
In figure: 1- single-chip microcontroller；2- pin.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Please refer to Fig. 1-Fig. 2, a kind of embodiment provided by the utility model: a kind of timing of low cost low-power consumption single-chip microcontroller is called out
Wake up circuit, including single-chip microcontroller 1, resistance R1, resistance R2, capacitor C1, and the single-chip microcontroller is connected by one end of pin 2 and resistance R1
It connects, the other end of resistance R1 is connect with capacitor C1, resistance R2, and capacitor C1 is connect with ground wire with the other end of resistance R2.
The resistance R1 can be omitted.
The resistance R2 is big valued resistor, the value of the value specific resistance R1 orders of magnitude several greatly.Resistance R1 resistance value is 10k,
Resistance R2 resistance value is 15M
The single-chip microcontroller 1 is the S3F9454 single-chip microcontroller of Samsung.
The pin 2 is the I/O port with interruption.
Working principle: the utility model includes single-chip microcontroller 1, resistance R1, resistance R2, capacitor C1, and the single-chip microcontroller is by drawing
Foot 2 is connect with one end of resistance R1, and the other end of resistance R1 is connect with capacitor C1, resistance R2, and capacitor C1 is another with resistance R2's
End is connect with ground wire.Wherein, the pin 2 is the I/O port with interruption, and R1 is the current-limiting resistance to charge to capacitor C1, is used for
Immediate current is excessive when the I/O port of single-chip microcontroller 1 being avoided to charge capacitor C1；Capacitor C1 stops for storing charge in single-chip microcontroller 1
It discharges when vibration state resistance R2；Resistance R2 be big valued resistor, resistance value can the orders of magnitude more several than R1 high, effect is to make
Capacitor C1 slowly discharges, and generates delay time, when capacitor C1 voltage judges voltage lower than I/O port low level, I/O port can be made to send out
Raw failing edge interrupts.
The circuit is operated using I/O port of the single-chip microcontroller 1 with failing edge interrupt function, the work of timing wake-up circuit
Process is as follows:
Step 1, operate normally when, set high level output for the I/O port, at this time single-chip microcontroller 1 export high level warp
Cross resistance R1 to capacitor C1 charge, since the resistance value of resistance R1 is smaller, capacitor C1 can just be charged within a very short time close to
The supply voltage of single-chip microcontroller 1；
Step 2 is completed when single-chip microcontroller 1 runs operation task, and when entering low power consumpting state, I/O port is set as input high resistant
State, and be set as input failing edge and interrupt wake-up, and operation STOP instruction in software, so that single-chip microcontroller 1 is entered the low function of failure of oscillation
Consumption state, the power consumption of single-chip microcontroller 1 at this moment has decreased to 1uA hereinafter, typical power consumption stream only has 0.1uA, and I/O port is in high electricity at this time
Flat, the charge stored on capacitor C1 can be discharged by resistance R2；
Step 3, with the slow electric discharge of the capacitor C1 quantity of electric charge, the voltage on capacitor C1 can be reduced slowly, pass through one section
After the delay of time, when the voltage on capacitor C1 drops below IO mouthfuls of low level judgement voltage values, I/O port is judged as low electricity
It is flat, it at this moment can make I/O port that failing edge occur and interrupt, which can wake up single-chip microcontroller 1, make single-chip microcontroller 1 restore to operate normally, the step
Delay time length can be determined by the capacitance of capacitor C1 and the resistance value of resistance R2 in rapid；
4, the process for repeating step 1~3 makes 1 uptime of single-chip microcontroller account for the percentage very little of total time, and failure of oscillation
Waiting time accounting is very big, so that it may realize that single-chip microcontroller only has very low average consumption stream in storage state.
Practical situations as shown in Fig. 2, use Samsung S3F9454 single-chip microcontroller, be utilized in 1 failing edge of single-chip microcontroller
Disconnected I/O port INT1, resistance R1 resistance value are 10k, and resistance R2 resistance value is 15M, and capacitor C1 value is 0.1uF, and single-chip microcontroller 1 is normally being transported
The time of row state is about 10ms, electric current 2mA, and the time waited in failure of oscillation is 2.2s or so, electric current 0.1uA, full-time
Between average consumption stream in section be 9.2uA, achieved the purpose that low-power consumption during storage, there is simple circuit, low cost, low quiet
The effect of state power consumption stream.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
Claims (5)
1. a kind of low cost low-power consumption single-chip microcontroller timing wake-up circuit, including single-chip microcontroller (1), resistance R1, resistance R2, capacitor C1,
It is characterized by: the single-chip microcontroller is connect by pin (2) with one end of resistance R1, the other end and capacitor C1, electricity of resistance R1
R2 connection is hindered, capacitor C1 is connect with ground wire with the other end of resistance R2.
2. a kind of low cost low-power consumption single-chip microcontroller timing wake-up circuit according to claim 1, it is characterised in that: the electricity
Resistance R1 can be omitted.
3. a kind of low cost low-power consumption single-chip microcontroller timing wake-up circuit according to claim 1, it is characterised in that: the electricity
Resistance R2 is big valued resistor, the value of the value specific resistance R1 orders of magnitude several greatly.
4. a kind of low cost low-power consumption single-chip microcontroller timing wake-up circuit according to claim 3, it is characterised in that: the list
Piece machine (1) is the S3F9454 single-chip microcontroller of Samsung.
5. a kind of low cost low-power consumption single-chip microcontroller timing wake-up circuit according to claim 1, it is characterised in that: described to draw
Foot (2) is the I/O port with interruption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821166468.8U CN208673086U (en) | 2018-07-23 | 2018-07-23 | A kind of low cost low-power consumption single-chip microcontroller timing wake-up circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821166468.8U CN208673086U (en) | 2018-07-23 | 2018-07-23 | A kind of low cost low-power consumption single-chip microcontroller timing wake-up circuit |
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| Publication Number | Publication Date |
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| CN208673086U true CN208673086U (en) | 2019-03-29 |
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| CN201821166468.8U Active CN208673086U (en) | 2018-07-23 | 2018-07-23 | A kind of low cost low-power consumption single-chip microcontroller timing wake-up circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112583403A (en) * | 2020-12-11 | 2021-03-30 | 重庆西南集成电路设计有限责任公司 | Circuit and method for indicating single chip microcomputer in wake-up stop state by using phase-locked loop locking |
| CN113534937A (en) * | 2020-04-20 | 2021-10-22 | 宁波方太厨具有限公司 | Single-chip microcomputer electrostatic impact reset detection recovery device and control method |
-
2018
- 2018-07-23 CN CN201821166468.8U patent/CN208673086U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113534937A (en) * | 2020-04-20 | 2021-10-22 | 宁波方太厨具有限公司 | Single-chip microcomputer electrostatic impact reset detection recovery device and control method |
| CN112583403A (en) * | 2020-12-11 | 2021-03-30 | 重庆西南集成电路设计有限责任公司 | Circuit and method for indicating single chip microcomputer in wake-up stop state by using phase-locked loop locking |
| CN112583403B (en) * | 2020-12-11 | 2022-09-23 | 重庆西南集成电路设计有限责任公司 | Circuit and method for indicating single chip microcomputer in wake-up stop state by using phase-locked loop locking |
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