CN109683697A - A kind of super low-power consumption system wake-up device and method - Google Patents
A kind of super low-power consumption system wake-up device and method Download PDFInfo
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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
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
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- G06F9/4418—Suspend and resume; Hibernate and awake
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Abstract
The invention discloses a kind of super low-power consumption system wake-up methods, include the following steps: step S1, and when user implements trigger action to sensing unit, sensing unit exports a trigger signal；Low-frequency clock signal is transmitted to its output end by step S2, switch unit；Step S3, control unit work according to clock frequency corresponding to low-frequency clock signal；Step S4, control unit receive the output signal of sensing unit, judge with the presence or absence of the electric signal for waking up rule is met in preset duration or preset data length range, if so, S5 is thened follow the steps, if it is not, thening follow the steps S6；Step S5, control unit, to obtain high frequency clock signal, work to clock switching interface load switching command according still further to clock frequency corresponding to the high frequency clock signal；Step S6, control unit control switch unit enter closed state.The present invention has hierarchical arousal function, can avoid leading to high power consumption because of false wake-up, at the same circuit structure it is simple, it is low in cost, be easily achieved.
Description
Technical field
The present invention relates to electric terminal equipment Rouser and method more particularly to a kind of super low-power consumption system wake-up devices
And method.
Background technique
With the development of electronic technology, the performance of electronic product is more and more stronger, and the ability of power consumption is also with enhancing.Especially
Terminal handheld device, as smart phone, the product of the human-computer interactions such as tablet computer, the longevity that standby time will will affect equipment and use
Life, therefore the requirement to the power consumption control ability of this electronic product is higher and higher.In order to reduce the power consumption of electronic equipment, work as electricity
Sub- equipment does not receive extraneous information in for a long time when, electronic equipment will enter sleep state or deep sleep shape
State, electronic equipment at this time not will do it the work of any substance, how to wake up the electronic system of deep sleep simultaneously
Keeping low power consumption is a urgent problem to be solved.
Currently, the mode that the electric terminal equipment of mainstream wakes up is that power button wakes up, but this wake-up mode is often
It can introduce and control signal wake-up device caused by accidentally touching, the power consumption of electric terminal equipment is caused to increase.Another electronics
The wake-up mode of terminal device especially smart phone is that fingerprint wakes up, but this wake-up mode is required in low-power consumption mode
When, fingerprint control chip can work, and the power consumption for also resulting in electric terminal equipment increases.In addition, some electric terminals are set
It is standby to be waken up by gesture, but the electronic equipment of this mode needs the active wake-up of timing to carry out detection gesture, not completely into
Enter deep sleep, the power consumption of electronic equipment at this time is still very high, thus increases the power consumption of electronic equipment.
In conclusion the prior art is primarily present following technical problem: firstly, power button, which wakes up, is called out using most
The mode of waking up, but can introduce and accidentally touch produced wake-up device；Secondly, fingerprint wake-up, which needs, is equipped with fingerprint collecting chip, and
And in low-power consumption mode, fingerprint chip operation is needed to detect finger print information, increases the power consumption of electronic equipment；In addition, gesture
Wake-up needs the work of electronic equipment touch control circuit to carry out detection gesture, increases the power consumption of electronic system.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the deficiencies of the prior art, providing a kind of with hierarchical wake-up
Function can avoid leading to high power consumption because of false wake-up, while circuit structure is simple, low in cost, the super low-power consumption system that is easily achieved
System Rouser and method.
In order to solve the above technical problems, the present invention adopts the following technical scheme that.
A kind of super low-power consumption system wake-up device comprising have: sensing unit, for implementing trigger action to it as user
When export a trigger signal；Clock signal unit, for providing low-frequency clock signal and high frequency clock signal；Switch unit, packet
Input, output end, control terminal and clock switching interface are included, the input terminal of the switch unit is connected to clock signal list
Member, the control terminal of the switch unit are connected to the sensing unit, and the switch unit is used for: when the control terminal receives
When the trigger signal, the low-frequency clock signal is transmitted to its output end, and receive according to the clock switching interface
One of the low-frequency clock signal and high frequency clock signal are transmitted to its output end by the switching command arrived；Control unit, it is described
The output end and clock switching interface of switch unit and the sensing unit are connected to control unit, described control unit
For working when receiving the low-frequency clock signal according to clock frequency corresponding to the low-frequency clock signal, receive simultaneously
The output signal of the sensing unit judges regular with the presence or absence of wake-up is met in preset duration or preset data length range
Electric signal: if so, described control unit to the clock switching interface load switching command to obtain high frequency clock signal,
It works according still further to clock frequency corresponding to the high frequency clock signal；If it is not, then described control unit controls the switch unit
Into closed state.
Preferably, the sensing unit include sequentially connected capacitance touch sensing device, capacitive detection circuit and
Filter circuit, the capacitive detection circuit are used to detect the capacitance variations of the capacitance touch sensing device and generate telecommunications
Number, which forms the trigger signal, the capacitance touch induction after the filter circuit is filtered
Device includes that signal receives pin and driving pin.
Preferably, the clock signal unit includes low-frequency oscillatory network for providing low-frequency clock signal and is used for
The high-frequency oscillating circuits of high frequency clock signal is provided.
Preferably, the switch unit includes multiple selector and first switch tube, the input of the multiple selector
For accessing low-frequency clock signal and high frequency clock signal, the output end of the multiple selector is connected to the first switch at end
The first end of pipe, the second end of the first switch tube as the switch unit output end and to be connected to the control single
Member, the control pin of the first switch tube are opened described in the address end conduct of the multiple selector for accessing trigger signal
It closes the clock switching interface of unit and is connected to described control unit.
Preferably, described control unit includes processing unit, scan control unit and touch detection unit, the switch
The output end of unit, the output end of the filter circuit and the driving pin are connected to the scan control unit, institute
It states scan control unit and is connected to described sweep for scanning the output signal for receiving the sensing unit, the touch detection unit
It retouches between control unit and the clock switching interface of the switch unit, the touch detection unit is used for the scan control
After the output signal of unit carries out judgement processing, Xiang Suoshu clock switching interface loads switching command, the processing unit difference
It is connected to the clock switching interface of the scan control unit and the switch unit, the processing unit is used for the clock
Switching interface sends switching command and obtains the output signal of the scan control unit.
Preferably, the processing unit, scan control unit and touch detection unit are independent circuit structure respectively, or
Person, the processing unit, scan control unit and the touch detection unit computer by being integrated in a main control chip respectively
Program is realized.
It preferably, further include having a Time-sharing control unit and second switch, the Time-sharing control unit is connected to low frequency
Between oscillating circuit and the control pin of second switch, two switch terminals of the second switch are serially connected with the capacitive touch
It touches between sensing device and the capacitive detection circuit, the Time-sharing control unit is led for second switch described in timing controlled
It is logical.
A kind of super low-power consumption system wake-up method, this method based on a device realize, described device include sensing unit,
Clock signal unit, switch unit and control unit, the switch unit include input, output end, control terminal and clock
Switching interface, the input terminal of the switch unit are connected to clock signal unit, and the control terminal of the switch unit is connected to institute
Sensing unit is stated, it is single that the output end and clock switching interface of the switch unit and the sensing unit are connected to control
Member, the clock signal unit is for providing low-frequency clock signal and high frequency clock signal, and described method includes following steps: step
Rapid S1, when user implements trigger action to the sensing unit, the sensing unit exports a trigger signal；Step S2, institute
The control terminal for stating switch unit receives the trigger signal, and the low-frequency clock signal is transmitted to its output end；Step S3,
After described control unit receives the low-frequency clock signal, work according to clock frequency corresponding to the low-frequency clock signal；
Step S4, described control unit receive the output signal of the sensing unit, judge preset duration or preset data length model
With the presence or absence of the electric signal for waking up rule is met in enclosing, if so, S5 is thened follow the steps, if it is not, thening follow the steps S6；Step S5,
Described control unit loads switching command to obtain high frequency clock signal, according still further to the high frequency clock to the clock switching interface
The work of clock frequency corresponding to signal；Step S6, described control unit control the switch unit and enter closed state.
Preferably, in the step S4, described control unit judges the output signal of the sensing unit with the presence or absence of super
The peak signal of given threshold is crossed, if it exists peak signal, then judges whether there is the electric signal for meeting and waking up rule.
Preferably, in the step S4, the wake-up rule includes: that described control unit subtracts currently received data
After the received data of previous frame, the peak signal in same frame with the presence or absence of at least two more than given threshold is judged, if so,
Step S5 is executed, if it is not, thening follow the steps S6.
Super low-power consumption system wake-up device disclosed by the invention, in the initial state, switch unit is in off state, i.e., super
Low power consumpting state, when user implements trigger action to the sensing unit, the sensing unit exports a trigger signal, later
The low-frequency clock signal is transmitted to its output end by the switch unit, so that described control unit receives the low-frequency clock
Signal, and work according to clock frequency corresponding to the low-frequency clock signal, into low-power consumption working condition, meanwhile, the control
Unit processed receives the output signal of the sensing unit, judges in preset duration or preset data length range with the presence or absence of full
Foot wakes up the electric signal of rule, if so, to clock switching interface load switching command to obtain high frequency clock signal, then
It works according to clock frequency corresponding to the high frequency clock signal；If it is not, then described control unit control the switch unit into
Enter closed state, comes back to super low-power consumption state.Based on the above principles, the present invention is under super low-power consumption mode, it is only necessary to very
Small a part of circuit detects wake-up signal, using the wake-up circuit of hierarchical form, is come in a manner of switching clock frequency
Lower the power consumption of electronic equipment, compared to existing technologies, the present invention has hierarchical arousal function, can avoid leading because of false wake-up
Cause high power consumption, while circuit structure of the present invention it is simple, it is low in cost, be easily achieved, be suitble to promote in mobile terminal device and answer
With.
Detailed description of the invention
Fig. 1 is the composition block diagram of super low-power consumption system wake-up device in first embodiment of the invention；
Fig. 2 is the flow chart of super low-power consumption system wake-up method in first embodiment of the invention；
Fig. 3 is from appearance screen structural schematic diagram；
Fig. 4 is the composition block diagram of super low-power consumption system wake-up device in second embodiment of the invention；
Fig. 5 is the flow chart of super low-power consumption system wake-up method in second embodiment of the invention；
Fig. 6 is the composition block diagram of super low-power consumption system wake-up device in third embodiment of the invention.
Specific embodiment
The present invention is described in more detail with reference to the accompanying drawings and examples.
Embodiment one
Fig. 1 is please referred to, the present embodiment proposes a kind of super low-power consumption system wake-up device comprising has:
Sensing unit 1, for exporting a trigger signal when user implements trigger action to it；
Clock signal unit 2, for providing low-frequency clock signal and high frequency clock signal；
Switch unit 3, includes input, output end, control terminal and clock switching interface, the switch unit 3 it is defeated
Enter end and be connected to clock signal unit 2, the control terminal of the switch unit 3 is connected to the sensing unit 1, the switch unit
3 are used for: when the control terminal receives the trigger signal, the low-frequency clock signal is transmitted to its output end, and
According to the switching command that the clock switching interface receives, one of the low-frequency clock signal and high frequency clock signal are transmitted
To its output end；
Control unit 4, the output end and clock switching interface and the sensing unit 1 of the switch unit 3 connect respectively
It is connected to control unit 4, described control unit 4 is used for when receiving the low-frequency clock signal according to the low-frequency clock signal institute
Corresponding clock frequency work, while the output signal of the sensing unit 1 is received, judge that preset duration or preset data are long
It spends in range with the presence or absence of the electric signal for meeting wake-up rule:
If so, described control unit 4 to the clock switching interface load switching command to obtain high frequency clock signal,
It works according still further to clock frequency corresponding to the high frequency clock signal；
If it is not, then described control unit 4 controls the switch unit 3 into closed state.
In the initial state, switch unit 3 is in off state above-mentioned apparatus, i.e. super low-power consumption state, when user is to described
When sensing unit 1 implements trigger action, the sensing unit 1 exports a trigger signal, and the switch unit 3 will be described low later
Frequency clock signal transmission is to its output end, so that described control unit 4 receives the low-frequency clock signal, and when according to the low frequency
The work of clock frequency corresponding to clock signal, into low-power consumption working condition, meanwhile, described control unit 4 receives the induction
The output signal of unit 1 judges in preset duration or preset data length range with the presence or absence of the telecommunications for meeting wake-up rule
Number, if so, being believed to clock switching interface load switching command with obtaining high frequency clock signal according still further to the high frequency clock
Clock frequency work corresponding to number；If it is not, then described control unit 4 controls the switch unit 3 into closed state, again
Return to super low-power consumption state.Based on the above principles, the present invention is under super low-power consumption mode, it is only necessary to which small part circuit comes
It detects wake-up signal and the function of electronic equipment is lowered in a manner of switching clock frequency using the wake-up circuit of hierarchical form
Consumption, compared to existing technologies, the present invention have hierarchical arousal function, can avoid leading to high power consumption because of false wake-up, while this
Invention circuit structure is simple, it is low in cost, be easily achieved, be suitble to promote and apply in mobile terminal device.
In the present embodiment, the sensing unit 1 includes sequentially connected capacitance touch sensing device 10, capacitance detecting
Circuit 11 and filter circuit 12, the capacitor that the capacitive detection circuit 11 is used to detect the capacitance touch sensing device 10 become
Change and generate electric signal, which forms the trigger signal after the filter circuit 12 is filtered, described
Capacitance touch sensing device 10 includes that signal receives pin RX and driving pin TX.
About the type of capacitance touch sensing device 10, the present embodiment is related to sensor PAD and refers to capacitor
SensorPAD is widely used in the touch screen of human-computer interaction product scope, especially smart phone and tablet computer.Please refer to figure
1, sensor PAD have signal receive RX PAD and sensor PAD drive TXPAD, the RX of this capacitor sensor PAD and
There are a sensing capacitance Cs, referred to as mutual tolerance screen between TX.There are potential lines between the RX and TX of this sensorPAD capacitance plate, when
When the finger of human body touches sensorPAD, human body, which posts finger, can absorb part potential lines to ground, lead to the electricity between TX and RX
Gesture is reduced, i.e., capacitor is reduced, and this variation is detected by capacitive detection circuit, to judge whether there is finger touch accordingly.It is existing
There is a further type of sensorPAD in technology to be known as from screen is held, referring to figure 3., this sensorPAD only has RX
PAD, the difference with mutual tolerance screen are that have a sensing capacitance Cs between RX PAD and ground, when finger touches this sensor capacitance plate
When, it is equivalent to body capacitance Cb and sensing capacitance Cs is in parallel, the sensing capacitance of practical PAD becomes larger, and the variation of this capacitor is electric
Hold detection circuit to detect, to judge whether there is finger touch accordingly.
The clock signal unit 2 includes to shake for providing the low frequency of low-frequency clock signal as a preferred method,
Swing circuit 20 and for providing the high-frequency oscillating circuits 21 of high frequency clock signal.
In the present embodiment, the switch unit 3 includes multiple selector U1 and first switch tube M0, the multi-path choice
For accessing low-frequency clock signal and high frequency clock signal, the output end of the multiple selector U1 is connected to the input terminal of device U1
The first end of the first switch tube M0, the second end of the first switch tube M0 as the switch unit 3 output end and
It is connected to described control unit 4, the control pin of the first switch tube M0 is for accessing trigger signal, the multiple selector
The address end of U1 as the switch unit 3 clock switching interface and be connected to described control unit 4.
Further, described control unit 4 includes processing unit 40, scan control unit 41 and touch detection unit
42, the output end of the switch unit 3, the output end of the filter circuit 12 and the driving pin TX are connected to institute
Scan control unit 41 is stated, the scan control unit 41 is for scanning the output signal for receiving the sensing unit 1, the touching
It touches detection unit 42 to be connected between the scan control unit 41 and the clock switching interface of the switch unit 3, the touching
Detection unit 42 is touched for after carrying out judgement processing to the output signal of the scan control unit 41, the switching of Xiang Suoshu clock to be connect
Mouthful load switching command, the processing unit 40 be connected to the scan control unit 41 and the switch unit 3 when
Clock switching interface, the processing unit 40 are used to send switching command to the clock switching interface and obtain the scanning control
The output signal of unit 41 processed.
The present embodiment is realized by the way of integrated circuit, in conjunction with influence when touching to sensorpad and touches calculation
Method realizes hierarchical arousal function.Referring to figure 2., which is super low-power consumption state, there was only electricity under the state
Hold detection and filter module is working, other circuits all stop working.
When finger finger touches sensor pad, capacitive detection module is detected to be caused by finger touch
The variation of sensorpad capacitor opens low frequency OSC module and scan control module low-velocity scanning via filter module
Sensorpad, this working condition are local-speed mode of operation, and calculating in local-speed mode of operation whether there is peak information.If deposited
In peak value, scan data gives whether touch detection module check data are greater than touch threshold, if there is no peak value, system into
Excess of imports low-power consumption mode.If the data of touch detection module check Current Scan subtract data that previous frame scans same
Occur two o'clock in one frame greater than touch threshold, close low frequency OSC clock circuit, opens high frequency OSC scanning sensorpad at full speed,
MCU and other peripheral equipments are waken up simultaneously, this operating mode is high-speed mode, calculates detailed touch letter in high-speed mode
Breath.It is less than touch threshold if the data of Current Scan subtract the data that previous frame scans or does not reach in same frame
Two touches, system enter super low-power consumption mode.
In the present embodiment, judge in preset duration or preset data length range with the presence or absence of the mistake for meeting wake-up rule
Cheng Zhong, preset duration refer to that preset time span, preset data length can be as unit of frames, can also be according to other data
Length unit is configured.
Based on the above principles, the present embodiment also proposed a kind of super low-power consumption system wake-up method, in conjunction with Fig. 1 and Fig. 2 institute
Show, this method is realized based on a device, and described device includes sensing unit 1, clock signal unit 2, switch unit 3 and control
Unit 4, the switch unit 3 include input, output end, control terminal and clock switching interface, the switch unit 3 it is defeated
Enter end and be connected to clock signal unit 2, the control terminal of the switch unit 3 is connected to the sensing unit 1, the switch unit
3 output end and clock switching interface and the sensing unit 1 is connected to control unit 4, the clock signal unit 2
For providing low-frequency clock signal and high frequency clock signal, described method includes following steps:
Step S1, when user implements trigger action to the sensing unit 1, the one triggering letter of the output of sensing unit 1
Number；
The control terminal of step S2, the switch unit 3 receive the trigger signal, and the low-frequency clock signal is transmitted
To its output end；
Step S3, after described control unit 4 receives the low-frequency clock signal, according to corresponding to the low-frequency clock signal
Clock frequency work；
Step S4, described control unit 4 receive the output signal of the sensing unit 1, judge preset duration or default
With the presence or absence of the electric signal for waking up rule is met within the scope of data length, if so, S5 is thened follow the steps, if it is not, thening follow the steps
S6；
Step S5, described control unit 4 to the clock switching interface load switching command to obtain high frequency clock signal,
It works according still further to clock frequency corresponding to the high frequency clock signal；
Step S6, described control unit 4 control the switch unit 3 into closed state.
Further, it is more than given threshold that described control unit 4, which judges that the output signal of the sensing unit 1 whether there is,
Peak signal, peak signal if it exists then judges whether there is the electric signal for meeting and waking up rule.
In the present embodiment, the wake-up rule includes: that currently received data are subtracted previous frame and connect by described control unit 4
After the data of receipts, the peak signal in same frame with the presence or absence of at least two more than given threshold is judged, if so, thening follow the steps
S5, if it is not, thening follow the steps S6.
In the present embodiment, the processing unit 40, scan control unit 41 and touch detection unit 42 are independent respectively
Circuit structure.
Embodiment two
The present embodiment and embodiment one the difference is that, in conjunction with shown in Fig. 4 and Fig. 5, the present embodiment further includes having one
Time-sharing control unit 5 and second switch M1, the Time-sharing control unit 5 are connected to low-frequency oscillatory network 20 and second switch
Between the control pin of M1, two switch terminals of the second switch M1 are serially connected with the capacitance touch sensing device 10 and institute
It states between capacitive detection circuit 11, the Time-sharing control unit 5 is for the conducting of second switch M1 described in timing controlled.
In the present embodiment, under super low-power consumption mode, only low frequency OSC circuit and time division control circuit is working, when point
When control module timing when being greater than time threshold, capacitive detection module and filter circuit are opened, when finger finger is touched
When sensorpad, capacitive detection module, which detects to be touched by finger, causes the variation of sensorpad capacitor, via filter module,
Scan control circuit and touch circuit are opened, at this time by the scanning of low frequency OSC circuit control and touch detection circuit, touch detection mould
If block checks that the data of Current Scan subtract the data that previous frame scans and occur two o'clock in same frame greater than touch threshold
Value closes low frequency OSC clock circuit and time division control circuit, opens high frequency OSC scanning sensorpad at full speed, while waking up MCU
And other peripheral equipments, calculate detailed touch information.
Embodiment three
The present embodiment and embodiment one the difference is that, please refer to Fig. 6, the processing unit, scan control unit
It is realized respectively by the computer program being integrated in a main control chip (MCU) with touch detection unit.
It please refers to Fig. 6, in the present embodiment, transfers to B2 module MCU algorithm to handle scan control and touch detection circuit.
In super low-power consumption mode, only capacitance detecting and filter circuit are working, when there is finger finger to touch sensorpad,
Capacitive detection module detects the variation for being touched by finger and causing sensorpad capacitor, via filter module, opens low frequency OSC
Circuit work, is connected metal-oxide-semiconductor M3, and MCU software program operates in lower-speed state, only when MCU software program checks Current Scan
If data when subtracting the data that previous frame scans and occurring two o'clock in same frame greater than touch threshold, close low frequency
OSC clock circuit, opens high frequency OSC, and software program generates control signal scanning sensorpad at full speed, calculates and touch letter in detail
Breath.If occurring two o'clock if the data for being unsatisfactory for Current Scan subtract the data that previous frame scans in same frame and being greater than
When the condition of touch threshold, electronic equipment enters super low-power consumption mode.
Super low-power consumption system wake-up device and method disclosed by the invention, beneficial effect compared to existing technologies exist
In, the present invention can hierarchical wake up corresponding modular circuit work and reinforce waking up MCU to the condition of full speed operation, effectively keep away
Exempt to lead to high power consumption because of false wake-up.Meanwhile the present invention only needs fraction circuit to work, and electronic equipment can be made from deep sleep
Ultra low power mode of operation wake up.In addition, the present invention is equipped with low-and high-frequency OSC or clock circuit, it is only effective to wake up letter
Breath could work in high frequency OSC or clock circuit, further decrease the power consumption of equipment.
The above is preferred embodiments of the present invention, is not intended to restrict the invention, all in technology model of the invention
Interior done modification, equivalent replacement or improvement etc. are enclosed, should be included in the range of of the invention protect.
Claims (10)
1. a kind of super low-power consumption system wake-up device, which is characterized in that include:
Sensing unit (1), for exporting a trigger signal when user implements trigger action to it；
Clock signal unit (2), for providing low-frequency clock signal and high frequency clock signal；
Switch unit (3), includes input, output end, control terminal and clock switching interface, the switch unit (3) it is defeated
Enter end to be connected to clock signal unit (2), the control terminal of the switch unit (3) is connected to the sensing unit (1), described to open
It closes unit (3) to be used for: when the control terminal receives the trigger signal, the low-frequency clock signal being transmitted to its output
End, and the switching command received according to the clock switching interface, by the low-frequency clock signal and high frequency clock signal
One of be transmitted to its output end；
Control unit (4), the output end and clock switching interface and the sensing unit (1) of the switch unit (3) are respectively
It is connected to control unit (4), described control unit (4) is used for when receiving the low-frequency clock signal according to the low-frequency clock
The work of clock frequency corresponding to signal, while the output signal of the sensing unit (1) is received, judge preset duration or pre-
If with the presence or absence of the electric signal for meeting wake-up rule within the scope of data length:
If so, described control unit (4) Xiang Suoshu clock switching interface loads switching command to obtain high frequency clock signal, then
It works according to clock frequency corresponding to the high frequency clock signal；
If it is not, then described control unit (4) controls the switch unit (3) into closed state.
2. super low-power consumption system wake-up device as described in claim 1, which is characterized in that the sensing unit (1) includes
Sequentially connected capacitance touch sensing device (10), capacitive detection circuit (11) and filter circuit (12), the capacitance detecting
Circuit (11) is used to detect the capacitance variations of the capacitance touch sensing device (10) and generates electric signal, which passes through
The filter circuit (12) forms the trigger signal after being filtered, the capacitance touch sensing device (10) includes
There is signal to receive pin (RX) and driving pin (TX).
3. super low-power consumption system wake-up device as claimed in claim 2, which is characterized in that clock signal unit (2) packet
Include the low-frequency oscillatory network (20) for providing low-frequency clock signal and the higher-order of oscillation electricity for providing high frequency clock signal
Road (21).
4. super low-power consumption system wake-up device as described in claim 1, which is characterized in that the switch unit (3) includes
Multiple selector (U1) and first switch tube (M0), the input terminal of the multiple selector (U1) is for accessing low-frequency clock signal
And high frequency clock signal, the output end of the multiple selector (U1) are connected to the first end of the first switch tube (M0), institute
The second end of first switch tube (M0) is stated as the output end of the switch unit (3) and is connected to described control unit (4), institute
The control pin of first switch tube (M0) is stated for accessing trigger signal, described in the address end of the multiple selector (U1) is used as
The clock switching interface of switch unit (3) and be connected to described control unit (4).
5. super low-power consumption system wake-up device as described in claim 1, which is characterized in that described control unit (4) includes
Processing unit (40), scan control unit (41) and touch detection unit (42), it is the output end of the switch unit (3), described
The output end of filter circuit (12) and the driving pin (TX) are connected to the scan control unit (41), described to sweep
Control unit (41) are retouched for scanning the output signal for receiving the sensing unit (1), touch detection unit (42) connection
Between the scan control unit (41) and the clock switching interface of the switch unit (3), the touch detection unit
(42) for after carrying out judgement processing to the output signal of the scan control unit (41), Xiang Suoshu clock switching interface to be loaded
Switching command, the processing unit (40) be connected to the scan control unit (41) and the switch unit (3) when
Clock switching interface, the processing unit (40) are used to send switching command to the clock switching interface and obtain the scanning
The output signal of control unit (41).
6. super low-power consumption system wake-up device as claimed in claim 5, which is characterized in that the processing unit (40), scanning
Control unit (41) and touch detection unit (42) are independent circuit structure respectively, alternatively, the processing unit (40), scanning
Control unit (41) and touch detection unit (42) are realized by the computer program being integrated in a main control chip respectively.
7. super low-power consumption system wake-up device as claimed in claim 3, which is characterized in that further include having a Time-sharing control unit
(5) and second switch (M1), the Time-sharing control unit (5) are connected to low-frequency oscillatory network (20) and second switch (M1)
Control pin between, two switch terminals of the second switch (M1) be serially connected with the capacitance touch sensing device (10) with
Between the capacitive detection circuit (11), the Time-sharing control unit (5) is led for second switch (M1) described in timing controlled
It is logical.
8. a kind of super low-power consumption system wake-up method, which is characterized in that this method realizes that described device includes based on a device
Sensing unit (1), clock signal unit (2), switch unit (3) and control unit (4), the switch unit (3) includes defeated
Enter end, output end, control terminal and clock switching interface, the input terminal of the switch unit (3) is connected to clock signal unit
(2), the control terminal of the switch unit (3) is connected to the sensing unit (1), the output end of the switch unit (3) and when
Clock switching interface and the sensing unit (1) are connected to control unit (4), and the clock signal unit (2) is for mentioning
For low-frequency clock signal and high frequency clock signal, described method includes following steps:
Step S1, when user implements trigger action to the sensing unit (1), the one triggering letter of sensing unit (1) output
Number；
The control terminal of step S2, the switch unit (3) receive the trigger signal, and the low-frequency clock signal is transmitted to
Its output end；
Step S3, after described control unit (4) receives the low-frequency clock signal, according to corresponding to the low-frequency clock signal
Clock frequency work；
Step S4, described control unit (4) receive the output signal of the sensing unit (1), judge preset duration or default
With the presence or absence of the electric signal for waking up rule is met within the scope of data length, if so, S5 is thened follow the steps, if it is not, thening follow the steps
S6；
Step S5, described control unit (4) Xiang Suoshu clock switching interface load switching command to obtain high frequency clock signal, then
It works according to clock frequency corresponding to the high frequency clock signal；
Step S6, described control unit (4) control the switch unit (3) and enter closed state.
9. super low-power consumption system wake-up method as claimed in claim 8, which is characterized in that in the step S4, the control
Unit (4) judges that the output signal of the sensing unit (1) whether there is the peak signal more than given threshold, if it exists peak value
Signal then judges whether there is the electric signal for meeting and waking up rule.
10. super low-power consumption system wake-up method as claimed in claim 9, which is characterized in that in the step S4, the wake-up
Rule include: after currently received data are subtracted the received data of previous frame by described control unit (4) judge be in same frame
No there are the peak signals that at least two is more than given threshold, if so, S5 is thened follow the steps, if it is not, thening follow the steps S6.
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| CN201811549900.6A CN109683697A (en) | 2018-12-18 | 2018-12-18 | A kind of super low-power consumption system wake-up device and method |
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| CN201811549900.6A CN109683697A (en) | 2018-12-18 | 2018-12-18 | A kind of super low-power consumption system wake-up device and method |
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