CN108932139A - Automatic boot circuit and electronic equipment - Google Patents

Automatic boot circuit and electronic equipment Download PDF

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Publication number
CN108932139A
CN108932139A CN201810650015.0A CN201810650015A CN108932139A CN 108932139 A CN108932139 A CN 108932139A CN 201810650015 A CN201810650015 A CN 201810650015A CN 108932139 A CN108932139 A CN 108932139A
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CN
China
Prior art keywords
connect
resistance
switch unit
capacitor
triode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810650015.0A
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Chinese (zh)
Inventor
张攀
陶攀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL Tongli Electronics Huizhou Co Ltd
Original Assignee
TCL Tongli Electronics Huizhou Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TCL Tongli Electronics Huizhou Co Ltd filed Critical TCL Tongli Electronics Huizhou Co Ltd
Priority to CN201810650015.0A priority Critical patent/CN108932139A/en
Publication of CN108932139A publication Critical patent/CN108932139A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00Arrangements for program control, e.g. control units
    • G06F9/06Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44Arrangements for executing specific programs
    • G06F9/4401Bootstrapping
    • G06F9/4411Configuring for operating with peripheral devices; Loading of device drivers
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26Power supply means, e.g. regulation thereof
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/22Modifications for ensuring a predetermined initial state when the supply voltage has been applied

Abstract

The invention discloses a kind of automatic boot circuit and electronic equipments.Automatic boot circuit of the present invention includes detection module and energy supply control module;The detection module includes first switch unit and USB detection unit, and when the USB detection unit detects USB flash disk access, the first power supply provides driving voltage through the first switch unit for the energy supply control module;The energy supply control module includes second switch unit and power supply unit, when the second switch unit detects the driving voltage, connects the connection between said supply unit and load, said supply unit is the load supplying.By using simple component and line, the purpose that insertion USB flash disk is detected and is switched on automatically, the advantage that there is fast response time, save USB flash disk detection I/O port are realized.

Description

Automatic boot circuit and electronic equipment
Technical field
The present invention relates to hardware device field more particularly to a kind of automatic boot circuits and electronic equipment.
Background technique
USB flash disk is a kind of very common electronic storage device, and more and more electronic products support external USB flash disk now.At present The file inside USB flash disk can be read directly after plugging USB flash disk in many electronic products, for example, for audio & video equipment, very Have the source USB, it is desirable that after USB flash disk is plugged in support, directly play the audio-video document of the inside more.But if electronic product be in Machine state, after plugging USB flash disk, it is still desirable to file in USB flash disk could be read after booting, can not directly restore power supply, allow electricity Sub- product is in running order.
Above content is only used to facilitate the understanding of the technical scheme, and is not represented and is recognized that above content is existing skill Art.
Summary of the invention
The main purpose of the present invention is to provide a kind of automatic boot circuit and electronic equipments, it is intended to solve in the prior art When loading standby, there is still a need for be switched on after insertion USB flash disk.
To achieve the above object, the present invention provides a kind of automatic boot circuit, and the circuit includes detection module and power supply Control module;
Specifically, the detection module includes first switch unit and USB detection unit, when the USB detection unit is examined When measuring USB flash disk access, the first power supply provides driving voltage through the first switch unit for the energy supply control module;The electricity Source control module includes second switch unit and power supply unit, when the second switch unit detects the driving voltage, The connection between said supply unit and load is connected, said supply unit is the load supplying.
Preferably, the first switch unit includes the first triode, first resistor and second resistance;One or three pole The emitter of pipe is connect with the first power supply, and the base stage of first triode is connect with the first end of the first resistor, described The collector of first triode is connect with the second switch unit;The second end of the first resistor and USB detection are single Member connection;The first end of the second resistance is connect with the emitter of first triode, the second end of the second resistance It is connect with the first end of the first resistor.
Preferably, the first switch unit further includes first diode and 3rd resistor, the sun of the first diode Pole is connect with the first power supply, and the cathode of first diode is connect with the first end of the 3rd resistor, and the of the 3rd resistor Two ends are connect with the emitter of first triode.
Preferably, the first switch unit further includes zener diode and first capacitor;The yin of the zener diode Pole is connect with the second end of the 3rd resistor, the plus earth of the zener diode;The first end of the first capacitor with The second end of the 3rd resistor connects, the second end ground connection of the first capacitor.
Preferably, the USB detection unit includes first diode and USB interface, the anode of second diode with Second source connection, the cathode of second diode connect with the USB interface, the cathode of second diode also with institute State the connection of first switch unit.
Preferably, said supply unit includes metal-oxide-semiconductor, the 4th resistance and the 5th resistance;The source electrode and third of the metal-oxide-semiconductor Power supply connection, the grid of the metal-oxide-semiconductor are connect with the first end of the 4th resistance, the drain electrode of the metal-oxide-semiconductor and the load Connection;The second end of 4th resistance is connect with the second switch unit;The first end of 5th resistance and described the The connection of three power supplys, the second end of the 5th resistance are connect with the first end of the 4th resistance.
Preferably, said supply unit further includes the second capacitor and third capacitor;The first end of second capacitor and institute The source electrode connection of metal-oxide-semiconductor is stated, the second end of second capacitor is connect with the grid of the metal-oxide-semiconductor;The of the third capacitor One end is connect with the drain electrode of the metal-oxide-semiconductor, the second end ground connection of the third capacitor.
Preferably, the second switch unit includes the second triode and the 6th resistance, the current collection of second triode Pole is connect with said supply unit, and the base stage of second triode is connect with the first end of the 6th resistance, and the described 6th The second end of resistance is connect with the first switch unit.
Preferably, the second switch unit further includes the 7th resistance and the 4th capacitor, the first end of the 7th resistance It is connect with the first end of the 6th resistance, the second end ground connection of the 7th resistance, the first end of the 4th capacitor and institute State the first end connection of the 6th resistance, the second end ground connection of the 4th capacitor.
The present invention also proposes a kind of electronic equipment, and the electronic equipment includes automatic boot circuit as described above.
When the present invention detects USB flash disk access by the USB detection unit, the first power supply is through the first switch unit The energy supply control module provides driving voltage;When the second switch unit detects the driving voltage, described in connection Connection between power supply unit and load, said supply unit are the load supplying, realize that insertion USB flash disk is detected and is switched on automatically Purpose, with fast response time, save USB flash disk detection I/O port advantage.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is a kind of functional block diagram of one embodiment of automatic boot circuit of the present invention;
Fig. 2 is a kind of structural schematic diagram of one embodiment of automatic boot circuit of the present invention.
Drawing reference numeral explanation:
Label Title Label Title
100 Detection module C1~C4 First capacitor is to the 4th capacitor
200 Energy supply control module Q1~Q2 First triode to the second triode
110 First switch unit D1~D2 First diode is to the second diode
120 USB detection unit VCC_12V First power supply
210 Second switch unit USB_5V2 Second source
220 Power supply unit VCC_3V3 Third power supply
R1~R7 First resistor is to the 7th resistance SYS_3V3 4th power supply
ZD1 Voltage-stabiliser tube diode USB1 USB interface
VT1 Metal-oxide-semiconductor RL1 Load
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention, Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship, Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present invention Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution Conjunction is not present, also not the present invention claims protection scope within.
The present invention provides a kind of automatic boot circuit, and referring to Fig.1, in one embodiment, the circuit includes detection module 100 and energy supply control module 200.
Specifically, the detection module 100 includes first switch unit 110 and USB detection unit 120, when the USB is examined When survey unit 120 detects USB flash disk access, the first power supply VCC_12V is that the power supply controls mould through the first switch unit 110 Block 200 provides driving voltage;The energy supply control module 200 includes second switch unit 210 and power supply unit 220, when described When second switch unit 210 detects the driving voltage, connects said supply unit 220 and load the connection between RL1, institute Power supply unit 220 is stated as load RL1 power supply.
It will be appreciated that after accessing USB flash disk, can directly restore to load RL1 by foregoing circuit when load RL1 is standby Power supply, allow load RL1 it is in running order, to achieve the purpose that Auto Power On.
When the present invention detects USB flash disk access by the USB detection unit, the first power supply is through the first switch unit The energy supply control module provides driving voltage;When the second switch unit detects the driving voltage, described in connection Connection between power supply unit and load, said supply unit are the load supplying, realize that insertion USB flash disk is detected and is switched on automatically Purpose, with fast response time, save USB flash disk detection I/O port advantage.
Referring to Fig. 2, further, the first switch unit 110 includes the first triode Q1, first resistor R1 and second Resistance R2;The emitter of the first triode Q1 is connect with the first power supply VCC_12V, the base stage of the first triode Q1 with The first end of the first resistor R1 connects, and the collector of the first triode Q1 is connect with the second switch unit 210; The second end of the first resistor R1 is connect with the USB detection unit 120;The first end of the second resistance R2 and described the The emitter of one triode Q1 connects, and the second end of the second resistance R2 is connect with the first end of the first resistor R1.
It should be noted that the first resistor R1 and second resistance R2 is divider resistance, it is described in the present embodiment The resistance value of first resistor R1 is 20K Ω, and the resistance value of the second resistance R2 is 22K Ω.
Further, the first switch unit 110 further includes first diode D1 and 3rd resistor R3, and the described 1st The anode of pole pipe D1 is connect with the first power supply VCC_12V, the cathode of the first diode D1 and the 3rd resistor R3 First end connection, the second end of the 3rd resistor R3 connect with the emitter of the first triode Q1.
It will be appreciated that the first diode D1 is Schottky diode, for preventing current flowing backwards, the third electricity Resistance R3 is current-limiting resistance, and in the present embodiment, the resistance value of the 3rd resistor R3 is 3.3K Ω.
Further, the first switch unit 110 further includes zener diode ZD1 and first capacitor C1;The pressure stabilizing The cathode of diode ZD1 is connect with the second end of the 3rd resistor R3, the plus earth of the zener diode ZD1;It is described The first end of first capacitor C1 is connect with the second end of the 3rd resistor R3, the second end ground connection of the first capacitor C1.
In the present embodiment, the voltage value of the zener diode ZD1 is 6.2V.
In the present embodiment, the USB detection unit 120 includes the second diode D2 and USB interface USB1, and the described 2nd 2 The anode of pole pipe D2 is connect with second source USB_5V2, and the cathode and the USB interface USB1 of the second diode D2 connects It connects, the cathode of the second diode D2 is also connect with the first switch unit 110.
It is understood that when load RL1 is in standby, the first power supply VCC_12V, the second source USB_5V2 normal power supply.
It should be noted that USB flash disk is connected with the USB interface USB1 when there is USB flash disk insertion, the second source USB_ 5V2 powers to the USB flash disk, and when not having USB flash disk insertion, the USB interface USB1 and USB flash disk are disconnected.
Wherein, the second diode D2 is Schottky diode, and when USB flash disk does not access, the voltage-stabiliser tube ZD1 will be described The emitter voltage Ve clamper of first triode Q1 is in 6.2V, due to the reverse-biased cut-off of the second diode D2, first resistor Connection between R1, second resistance R2 and the second diode D2 is in off state, therefore the base stage of the first triode Q1 Voltage Vb is also 6.2V, the first triode Q1 cut-off.When USB flash disk access, the second source USB_5V2 passes through described the Two diode D2 give USB flash disk power supply, and the tube voltage drop of the second diode D2 is about in 0.2V, therefore the USB interface The voltage at the both ends USB1 is about 5V.The emitter voltage Ve of the first triode Q1 is still 6.2V, the first triode Q1 Emitter and the USB interface USB1 between pass through the second resistance R2, first resistor R1 divide, first triode Q1 is switched on, therefore the first power supply VCC_12V is by the 3rd resistor R3, the first triode Q1, is the electricity Source control module 200 provides driving voltage.
In the present embodiment, said supply unit 220 includes metal-oxide-semiconductor VT1, the 4th resistance R4 and the 5th resistance R5;The MOS The source electrode of pipe VT1 is connect with third power supply VCC_3V3, and the first end of the grid of the metal-oxide-semiconductor VT1 and the 4th resistance R4 connect It connects, the drain electrode of the metal-oxide-semiconductor VT1 is connect with the load RL1;The second end of the 4th resistance R4 and the second switch list Member 210 connects;The first end of the 5th resistance R5 is connect with the third power supply VCC_3V3, and the of the 5th resistance R5 Two ends are connect with the first end of the 4th resistance R4.
It is understood that when load RL1 is in standby, the third power supply VCC_3V3 normal power supply.
It should be noted that the 4th resistance R4 and the 5th resistance R5 is divider resistance, it is described in the present embodiment The resistance value of 4th resistance R4 is 100K Ω, and the resistance value of the 5th resistance R5 is 470K Ω.
In the concrete realization, the 4th power supply SYS_3V3 is load RL1 power supply.
In the present embodiment, said supply unit 220 further includes the second capacitor C2 and third capacitor C3;The second capacitor C2 First end connect with the source electrode of the metal-oxide-semiconductor VT1, the grid of the second end of the second capacitor C2 and the metal-oxide-semiconductor VT1 connect It connects;The first end of the third capacitor C3 is connect with the drain electrode of the metal-oxide-semiconductor VT1, the second end ground connection of the third capacitor C3.
In the present embodiment, the second switch unit 210 include the second triode Q2 and the 6th resistance R6, the described 2nd 3 The collector of pole pipe Q2 is connect with said supply unit 220, and the base stage of the second triode Q2 is with the 6th resistance R6's First end connection, the second end of the 6th resistance R6 are connect with the first switch unit 110.
Further, the second switch unit 210 further includes the 7th resistance R7 and the 4th capacitor C4, the 7th resistance The first end of R7 is connect with the first end of the 6th resistance R6, the second end ground connection of the 7th resistance R7, the 4th electricity The first end for holding C4 is connect with the first end of the 6th resistance R6, the second end ground connection of the 4th capacitor C4.
It should be noted that when the USB flash disk does not access, because the first triode Q1 ends, the 6th resistance R6 Voltage be 0V, the second triode Q2 cut-off, so that the grid voltage Vg of the metal-oxide-semiconductor VT1 is 3.3V, the metal-oxide-semiconductor VT1 is also at off state, and the 4th power supply SYS_3V3 is without output.When USB flash disk access, the first power supply VCC_ 12V is that the energy supply control module 200 provides driving voltage, the second triode Q2 conducting, the third power supply VCC_3V3 By the partial pressure of the 5th resistance R5, the 4th resistance R4 and the second triode Q2 tube voltage drop, mentioned for the metal-oxide-semiconductor VT1 For biasing, the metal-oxide-semiconductor VT1 is connected, the 4th power supply SYS_3Y3 has output, powers, reaches out for the load RL1 The purpose of machine.
Automatic boot circuit of the present invention includes detection module and energy supply control module;The detection module, including the One switch unit and USB detection unit, when the USB detection unit detects USB flash disk access, the first power supply is opened through described first It closes unit and provides driving voltage for the energy supply control module;The energy supply control module includes that second switch unit and power supply are single Member connects the connection between said supply unit and load, institute when the second switch unit detects the driving voltage Stating power supply unit is the load supplying.By using simple component and line, realize that insertion USB flash disk is detected and is switched on automatically Purpose, with fast response time, save USB flash disk detection I/O port advantage.
The present invention also proposes a kind of electronic equipment, and the electronic equipment includes automatic boot circuit as described above, described The circuit structure of the automatic boot circuit of electronic equipment can refer to above-described embodiment, and details are not described herein;It is understood that by The technical solution of above-mentioned automatic boot circuit is used in the electronic equipment of the present embodiment, therefore the electronic equipment is with above-mentioned All beneficial effects;It should be understood that the electronic equipment can be the equipment such as smart phone, tablet computer, smart television, The present embodiment is without restriction to this.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills Art field, is included within the scope of the present invention.

Claims (10)

1. a kind of automatic boot circuit, which is characterized in that the circuit includes detection module and energy supply control module;Wherein,
The detection module includes first switch unit and USB detection unit, when the USB detection unit detects that USB flash disk accesses When, the first power supply provides driving voltage through the first switch unit for the energy supply control module;
The energy supply control module includes second switch unit and power supply unit, when the second switch unit detects the drive When dynamic voltage, the connection between said supply unit and load is connected, said supply unit is the load supplying.
2. automatic boot circuit as described in claim 1, which is characterized in that the first switch unit includes the one or three pole Pipe, first resistor and second resistance;Wherein,
The emitter of first triode is connect with the first power supply, base stage and the first resistor of first triode First end connection, the collector of first triode are connect with the second switch unit;
The second end of the first resistor is connect with the USB detection unit;
The first end of the second resistance is connect with the emitter of first triode, the second end of the second resistance and institute State the first end connection of first resistor.
3. automatic boot circuit as claimed in claim 2, which is characterized in that the first switch unit further includes the one or two pole Pipe and 3rd resistor, the anode of the first diode are connect with the first power supply, the cathode of first diode and third electricity The first end of resistance connects, and the second end of the 3rd resistor is connect with the emitter of first triode.
4. automatic boot circuit as claimed in claim 2 or claim 3, which is characterized in that the first switch unit further includes pressure stabilizing Diode and first capacitor;The cathode of the zener diode is connect with the second end of the 3rd resistor, two pole of pressure stabilizing The plus earth of pipe;The first end of the first capacitor is connect with the second end of the 3rd resistor, and the of the first capacitor Two ends ground connection.
5. automatic boot circuit as described in claim 1, which is characterized in that the USB detection unit includes the second diode And USB interface, the anode of second diode are connect with second source, cathode and the USB of second diode connect Mouth connection, the cathode of second diode are also connect with the first switch unit.
6. automatic boot circuit as described in claim 1, which is characterized in that said supply unit includes metal-oxide-semiconductor, the 4th resistance And the 5th resistance;The source electrode of the metal-oxide-semiconductor is connect with third power supply, and the first of the grid of the metal-oxide-semiconductor and the 4th resistance End connection, the drain electrode of the metal-oxide-semiconductor and the load connect;The second end of 4th resistance and the second switch unit connect It connects;The first end of 5th resistance is connect with the third power supply, the second end of the 5th resistance and the 4th resistance First end connection.
7. automatic boot circuit as claimed in claim 6, which is characterized in that said supply unit further includes the second capacitor and Three capacitors;The first end of second capacitor is connect with the source electrode of the metal-oxide-semiconductor, the second end of second capacitor with it is described The grid of metal-oxide-semiconductor connects;The first end of the third capacitor is connect with the drain electrode of the metal-oxide-semiconductor, and the second of the third capacitor End ground connection.
8. automatic boot circuit as described in claim 1, which is characterized in that the second switch unit includes the second triode And the 6th resistance, the collector of second triode are connect with said supply unit, the base stage of second triode and institute The first end connection of the 6th resistance is stated, the second end of the 6th resistance is connect with the first switch unit.
9. automatic boot circuit as claimed in claim 8, which is characterized in that the second switch unit further includes the 7th resistance And the 4th capacitor, the first end of the 7th resistance are connect with the first end of the 6th resistance, the second of the 7th resistance End ground connection, the first end of the 4th capacitor are connect with the first end of the 6th resistance, the second termination of the 4th capacitor Ground.
10. a kind of electronic equipment, which is characterized in that the electronic equipment includes according to any one of claims 1 to 9 opening automatically Electromechanical road.
CN201810650015.0A 2018-06-21 2018-06-21 Automatic boot circuit and electronic equipment Pending CN108932139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810650015.0A CN108932139A (en) 2018-06-21 2018-06-21 Automatic boot circuit and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810650015.0A CN108932139A (en) 2018-06-21 2018-06-21 Automatic boot circuit and electronic equipment

Publications (1)

Publication Number Publication Date
CN108932139A true CN108932139A (en) 2018-12-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810650015.0A Pending CN108932139A (en) 2018-06-21 2018-06-21 Automatic boot circuit and electronic equipment

Country Status (1)

Country Link
CN (1) CN108932139A (en)

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CN107632861A (en) * 2017-09-19 2018-01-26 联想(北京)有限公司 Computer control method and computer system
CN107784218A (en) * 2017-10-23 2018-03-09 广州视源电子科技股份有限公司 It is a kind of for the starting-up method of terminal device, device, equipment and storage medium

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6567921B1 (en) * 1999-01-25 2003-05-20 Agere Systems, Inc. Asynchronous low power mode bus controller circuit and method of low power mode operation
CN201039355Y (en) * 2007-05-18 2008-03-19 青岛海信电器股份有限公司 Video/audio playing device with high-speed USB interface circuit
CN101465559A (en) * 2007-12-19 2009-06-24 鸿富锦精密工业(深圳)有限公司 Dual power switching circuit
CN202076771U (en) * 2011-04-29 2011-12-14 比亚迪股份有限公司 USB OTG circuit and portable electronic device utilizing thereof
US20130132758A1 (en) * 2011-11-18 2013-05-23 Canon Kabushiki Kaisha Hub device and system using the same
CN102749980A (en) * 2012-05-25 2012-10-24 深圳Tcl新技术有限公司 Method and system for charging external universal serial bus (USB) device when universal serial bus (USB) primary device is in a standby state
CN202978310U (en) * 2012-08-31 2013-06-05 深圳市中远航科技有限公司 Movable power supply device
CN203720778U (en) * 2014-02-24 2014-07-16 东莞市远峰科技有限公司 Circuit for wakening host by USB peripheral
CN203759164U (en) * 2014-03-22 2014-08-06 深圳市伟文无线通讯技术有限公司 Circuit for detecting access state of USB load equipment
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CN107784218A (en) * 2017-10-23 2018-03-09 广州视源电子科技股份有限公司 It is a kind of for the starting-up method of terminal device, device, equipment and storage medium

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Application publication date: 20181204

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