CN108647160A - USB force downloads circuit, mobile terminal, method for down loading and data line - Google Patents
USB force downloads circuit, mobile terminal, method for down loading and data line Download PDFInfo
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- CN108647160A CN108647160A CN201810684814.XA CN201810684814A CN108647160A CN 108647160 A CN108647160 A CN 108647160A CN 201810684814 A CN201810684814 A CN 201810684814A CN 108647160 A CN108647160 A CN 108647160A
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/10—Program control for peripheral devices
- G06F13/102—Program control for peripheral devices where the programme performs an interfacing function, e.g. device driver
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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Abstract
The invention discloses a kind of USB force downloads circuits, including：Switching circuit, the switching circuit include first end, second end and third end；It forces to start pin from USB, is electrically connected to the second end；Power pins are electrically connected to the third end；ID pins are electrically connected to the first end；Wherein, described to force to start pin and the power pins short circuit from USB when the switching circuit is connected.The present invention also provides a kind of mobile terminal and method for down loading and USB data line, said program realize by adding USB force download circuits, realize be not required to tear open machine or punching force download can be realized, it is easy to operate, improve download efficiency.
Description
Technical field
The present invention relates to field of mobile terminals more particularly to a kind of USB force downloads circuit, mobile terminal, method for down loading
And data line.
Background technology
All it is short by the production test point reserved to mainboard for force download in the Terminal Designs circuit such as existing mobile phone
The mode connect realizes force download, but to operate very inconvenient, is unfavorable for research staff's debugging.Especially complete machine shape
Force download is extremely complex under state, inconvenient.
Invention content
In view of this, a kind of USB force downloads circuit of present invention proposition, mobile terminal, method for down loading and data line, with solution
Certainly above-mentioned technical problem.
First, to achieve the above object, the present invention proposes a kind of USB force downloads circuit, which is characterized in that the USB
Force download circuit includes：
Switching circuit, the switching circuit include first end, second end and third end；
It forces to start pin from USB, is electrically connected to the second end；
Power pins are electrically connected to the third end；
ID pins are electrically connected to the first end；
Wherein, described to force to start pin and the power pins short circuit from USB when the switching circuit is connected.
Optionally, the switching circuit includes：
The first end of transistor, the transistor is electrically connected to the ID pins, the second end electrical connection of the transistor
It forces to start pin from USB in described, the third end of the transistor is electrically connected to the power pins；
Resistance, one end are electrically connected to the first end of the transistor, other end ground connection.
Optionally, the transistor is N-MOS pipes, the first end of the grids of the N-MOS pipes as the transistor, institute
State second end of the source electrode of N-MOS pipes as the transistor, the third of the N-MOS pipes to drain as the transistor
End.
Optionally, when the level of the ID pins is high level, the transistor turns are described to force to start from USB
Pin and the power pins short circuit.
In addition, to achieve the above object, the present invention also provides a kind of mobile terminal, including processor, USB interface, power supplys
Pin feet, and USB force download circuits as described above；
The pressure of the processor starts pin feet from USB and is electrically connected to described force from USB startup pins；
The power supply pin feet are electrically connected to the power port；
The USB interface includes ID pin feet, and the ID pin feet in the USB interface are electrically connected to the ID pins.
Optionally, when the mobile terminal accesses special USB data line, the level of the ID pin feet is high electricity
Flat, the switching circuit conducting is described to force to start pin and the power pins short circuit, the mobile terminal execution from USB
The instruction of force download, wherein the ID pin feet in the special USB data line are connected with power supply pin feet.
Optionally, when the mobile terminal accesses normal USB data line, the level of the ID pin feet is low electricity
Flat, the switching circuit is not turned on, and the mobile terminal execution is normally downloaded and the instruction of data transmission, wherein described normal
USB data line in ID pin feet it is hanging.
In addition, to achieve the above object, the present invention also provides a kind of USB force downloads methods, are applied to as described above
Mobile terminal includes the following steps：
Detect the level for forcing to start pin feet from USB；
When the level for detecting that the USB starts pin feet is high level, the instruction of force download is executed.
Optionally, when detect it is described force from USB to start the level of pin feet be low level when, execute it is normal download and
The instruction of data transmission.
In addition, to achieve the above object, the present invention also provides a kind of USB data lines, are applied to as described above mobile whole
End, including：First USB interface, secondary USB interface, first USB interface and the secondary USB interface are connected by data line
It connects, first USB interface is the interface for accessing the mobile terminal, and first USB interface includes power supply pin feet, ground connection
Pin feet, the positive pin feet of data line, data line bear pin feet, ID pin feet, and the ID pin feet are connect with the power supply pin feet.
Compared to the prior art, the USB force download circuits proposed in embodiment of the present invention, including：Switching circuit,
The switching circuit includes first end, second end and third end；It forces to start pin from USB, is electrically connected to the second end；Electricity
Source pin is electrically connected to the third end；ID pins are electrically connected to the first end；Wherein, when the switching circuit is connected
When, it is described to force to start pin and the power pins short circuit from USB.By switching circuit control when the special USB numbers of insertion
When according to line, force to start pin and the power pins short circuit from USB, so that the mobile terminal execution force download refers to
It enables, exposes reserved test point without tearing machine or punching open, the mode of short circuit could execute force download instruction, operation later
It is convenient, improve download efficiency.
Description of the drawings
Fig. 1 is the circuit block diagram of an embodiment of USB force downloads circuit of the present invention；
Fig. 2 is the circuit diagram of one embodiment of USB force downloads circuit of the present invention；
Fig. 3 is total schematic diagram of one embodiment of mobile terminal of the present invention
Fig. 4 is mobile terminal of the present invention one optional hardware architecture diagram of each embodiment；
Fig. 5 is the circuit block diagram of one embodiment of mobile terminal of the present invention；
Fig. 6 is the circuit block diagram of another embodiment of mobile terminal of the present invention；
Fig. 7 is the flow diagram of the first embodiment of USB force downloads method of the present invention；
Fig. 8 is the structural schematic diagram of an embodiment of the first USB interface of USB data line of the present invention.
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 implementation mode
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
In subsequent description, using for indicating that the suffix of such as " module ", " component " or " unit " of element is only
The explanation for being conducive to the present invention, itself does not have a specific meaning.Therefore, " module ", " component " or " unit " can mix
Ground uses.
Referring to Fig. 1, it is the circuit block diagram of 10 first embodiment of USB force downloads circuit of the present invention.The USB is forced
Download circuit 10 is applied in mobile terminal.
In the present embodiment, USB force downloads circuit 10 includes switching circuit 100, forces to start pin FORCE_ from USB
USB_BOOT, power pins VREG_L13A_1P8 and ID pin USB_HS_ID.In a physical circuit, the pressure is from USB
Start pin FORCE_USB_BOOT to connect from USB startup pin feet with the pressure in mobile terminal, power pins VREG_
L13A_1P8 is connected with the power supply PIN foot in mobile terminal, in the ID pins USB_HS_ID and mobile terminal in USB interface
ID pin feet connect.
In the present embodiment, switching circuit 100 includes first end A, second end B and third end C.It forces to draw from USB startups
Foot FORCE_USB_BOOT is electrically connected to second end B, and power pins VREG_L13A_1P8 is electrically connected to third end C, ID pin
USB_HS_ID is electrically connected to first end A.In the present embodiment, described to force to start pin FORCE_USB_BOOT from USB to be to sentence
Whether disconnected mobile terminal executes the pin of force download instruction.It forces to be specifically defined from USB startups pin FORCE_USB_BOOT
It is as follows：
When mobile terminal is in normal condition, the CPU acquiescences of mobile terminal can start from EMMC, you can pass through USB numbers
Computer is connected according to line mode and downloads program, but (program of EMMC itself is asked when mobile terminal processor is in abnormality
Topic is damaged by uncertain factor, leads to not complete startup or None- identified port), it needs to use force download mode
Download program.Download method be will force from USB startup pin FORCE_USB_BOOT draw high to power level (power level with
For 1.8V), burning program can be executed automatically into force download pattern by inserting in USB preprocessors.
It will force to draw high the side generally used to power level from USB startups pin FORCE_USB_BOOT in the prior art
Method is：The pressure that Mobile terminal main board is reserved starts pin FORCE_USB_BOOT and power pins VREG_ from USB
L13A_1P8 test point short circuits will make two test point short circuits however, since two test points are located on mainboard, must
Two test points must be exposed first, in this way, it is necessary to which punching or tear open the mode of machine could make two test points sudden and violent
Dew, operation are inconvenient.
In the present embodiment, pin FORCE_USB_ is started from USB by pressure originally reserved in the prior art
Switching circuit 100 and an ID pin USB_HS_ID are added between BOOT and power pins VREG_L13A_1P8 test points,
So that when ID pins USB_HS_ID accesses a high level, the switching circuit 100 conducting, so that the pressure is opened from USB
Dynamic pin FORCE_USB_BOOT and power pins VREG_L13A_1P8 short circuits, to which mobile terminal can enter under pressure
Load pattern.The present embodiment is forced to start pin FORCE_USB_BOOT from USB by controlling the conducting of switching circuit 100 to control
And power pins VREG_L13A_1P8 short circuits, so as to without exposing the pressure by way of punching or tearing machine open
Start pin FORCE_USB_BOOT and power pins VREG_L13A_1P8 from USB, it is easy to operate, and can improve
Efficiency.
Referring to Fig. 2, it is the circuit diagram of mono- embodiments of USB force downloads circuit 10a of the present invention.
As shown in Fig. 2, in embodiments of the present invention, USB force download circuits 10a includes transistor Q1, resistance R, by force
System starts pin FORCE_USB_BOOT, power pins VREG_L13A_1P8 and ID pin USB_HS_ID from USB.Transistor
The first end of Q1 is electrically connected to ID pin USB_HS_ID, and the second end of transistor Q1 is electrically connected to pressure and starts pin from USB
The third end of FORCE_USB_BOOT, transistor Q1 are electrically connected to power pins VREG_L13A_1P8.One end of resistance R is electrically connected
It is connected to the first end of transistor Q1, the other end ground connection of resistance R.In a physical circuit, which starts pin from USB
FORCE_USB_BOOT and the pressure in mobile terminal start pin feet from USB and connects, power pins VREG_L13A_1P8 with
ID pin feet in power supply PIN foot connection in mobile terminal, the ID pins USB_HS_ID and mobile terminal in USB interface connect
It connects.In the present embodiment, when the level of ID pins USB_HS_ID is high level, transistor Q1 conductings, pressure is opened from USB
Dynamic pin FORCE_USB_BOOT and power pins VREG_L13A_1P8 short circuits, mobile terminal can enter force download pattern.
In a specific embodiment, transistor Q1 manages for N-MOS, and the grid G of the N-MOS pipes is as transistor Q1's
First end, the second end of the source Ss of the N-MOS pipes as the transistor Q1, the drain D of the N-MOS pipes is as crystal
The third end of pipe Q1.It is understood that in other embodiment of the present invention, transistor Q1 may be P-MOS pipes, NPN
Type triode or PNP type triode etc..
Referring to Fig. 3, it is total schematic diagram of one embodiment of mobile terminal of the present invention.
Mobile terminal can be implemented in a variety of manners.For example, mobile terminal described in the present invention may include such as
Mobile phone, tablet, laptop etc..
It will be illustrated by taking mobile terminal as an example in subsequent descriptions, it will be appreciated by those skilled in the art that in addition to special
Except element for moving purpose, construction according to the embodiment of the present invention can also apply to the device of fixed type.
Referring to Fig. 3, it is total schematic diagram of 20 1 embodiment of this mobile terminal.The USB of the mobile terminal 20 connects
Mouth 230 is connect by special data line 30 with host computer (not shown), and the host computer is by taking computer as an example.Mobile terminal 20 passes through
After special data line is connect with computer, you can make it when abnormality has to carry out force download, it is not necessary to pass through punching
Or it tears the mode of machine open and starts pin FORCE_USB_BOOT and power pins VREG_L13A_ from USB to expose the pressure
1P8, it is easy to operate, and efficiency can be improved.
It will be understood by those skilled in the art that mobile terminal shown in Fig. 4 does not constitute the restriction to mobile terminal, move
Dynamic terminal may include either combining certain components or different components arrangement than illustrating more or fewer components.
Referring to Fig. 4, it is 20 each embodiment of mobile terminal of the present invention, one optional hardware architecture diagram.
The mobile terminal 20 may include：RF (Radio Frequency, radio frequency) unit 101, WiFi module 102, audio
Output unit 103, A/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107,
The portions such as interface unit 108, memory 109, processor 110 and power supply 111 and USB interface 230, USB force downloads circuit 10
Part.It will be understood by those skilled in the art that mobile terminal structure shown in Fig. 4 does not constitute the restriction to mobile terminal, move
Dynamic terminal may include either combining certain components or different components arrangement than illustrating more or fewer components.
The all parts of mobile terminal 20 are specifically introduced with reference to Fig. 4：
Radio frequency unit 101 can be used for receiving and sending messages or communication process in, signal sends and receivees, specifically, by base station
Downlink information receive after, to processor 110 handle；In addition, the data of uplink are sent to base station.In general, radio frequency unit 101
Including but not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier, duplexer etc..In addition, penetrating
Frequency unit 101 can also be communicated with network and other equipment by radio communication.Above-mentioned wireless communication can use any communication
Standard or agreement, including but not limited to GSM (Global System of Mobile communication, global system for mobile telecommunications
System), GPRS (General Packet Radio Service, general packet radio service), CDMA2000 (Code
Division Multiple Access 2000, CDMA 2000), WCDMA (Wideband Code Division
Multiple Access, wideband code division multiple access), TD-SCDMA (Time Division-Synchronous Code
Division Multiple Access, TD SDMA), FDD-LTE (Frequency Division
Duplexing-Long Term Evolution, frequency division duplex long term evolution) and TDD-LTE (Time Division
Duplexing-Long Term Evolution, time division duplex long term evolution) etc..
WiFi belongs to short range wireless transmission technology, and mobile terminal can help user to receive and dispatch electricity by WiFi module 102
Sub- mail, browsing webpage and access streaming video etc., it has provided wireless broadband internet to the user and has accessed.Although Fig. 4 shows
Go out WiFi module 102, but it is understood that, and it is not belonging to must be configured into for mobile terminal, it completely can be according to need
It to be omitted in the range for the essence for not changing invention.
Audio output unit 103 can be in call signal reception pattern, call mode, record mould in mobile terminal 20
When under the isotypes such as formula, speech recognition mode, broadcast reception mode, it is that radio frequency unit 101 or WiFi module 102 are received or
The audio data stored in memory 109 is converted into audio signal and exports to be sound.Moreover, audio output unit 103
The relevant audio output of specific function executed with mobile terminal 20 can also be provided (for example, call signal receives sound, message
Receive sound etc.).Audio output unit 103 may include loud speaker, buzzer etc..
A/V input units 104 are for receiving audio or video signal.A/V input units 104 may include graphics processor
(Graphics Processing Unit, GPU) 1041 and microphone 1042, graphics processor 1041 is in video acquisition mode
Or the image data of the static images or video obtained by image capture apparatus (such as camera) in image capture mode carries out
Reason.Treated, and picture frame may be displayed on display unit 106.Through graphics processor 1041, treated that picture frame can be deposited
Storage is sent in memory 109 (or other storage mediums) or via radio frequency unit 101 or WiFi module 102.Mike
Wind 1042 can connect in telephone calling model, logging mode, speech recognition mode etc. operational mode via microphone 1042
Quiet down sound (audio data), and can be audio data by such acoustic processing.Audio that treated (voice) data can
To be converted to the format output that can be sent to mobile communication base station via radio frequency unit 101 in the case of telephone calling model.
Microphone 1042 can implement various types of noises elimination (or inhibition) algorithms and send and receive sound to eliminate (or inhibition)
The noise generated during frequency signal or interference.
Mobile terminal 20 further includes at least one sensor 105, such as optical sensor, motion sensor and other sensings
Device.Specifically, optical sensor includes ambient light sensor and proximity sensor, wherein ambient light sensor can be according to ambient light
The light and shade of line adjusts the brightness of display panel 1061, and proximity sensor can close aobvious when mobile terminal 20 is moved in one's ear
Show panel 1061 and/or backlight.As a kind of motion sensor, accelerometer sensor can detect in all directions (generally
Three axis) acceleration size, size and the direction of gravity are can detect that when static, can be used to identify mobile phone posture application (ratio
Such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, tap)；Extremely
It is the fingerprint sensor that can also configure in mobile phone, pressure sensor, iris sensor, molecule sensor, gyroscope, barometer, wet
The other sensors such as meter, thermometer, infrared sensor are spent, details are not described herein.
In the present embodiment, mobile terminal 20 includes there are two display unit 106, and mobile terminal 20 is arranged in one of them
Front, another is arranged at the back side of mobile terminal 20.Display unit 106 is for showing information input by user or being supplied to
The information of user.Display unit 106 may include display panel 1061, and liquid crystal display (Liquid Crystal may be used
Display, LCD), the forms such as Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) it is aobvious to configure
Show panel 1061.Identical display specifically may be used in two display units 106, can also use different displays.
User input unit 107 can be used for receiving the number or character information of input, and generate the use with mobile terminal
Family is arranged and the related key signals input of function control.Specifically, user input unit 107 may include touch panel 1071 with
And other input equipments 1072.Touch panel 1071, also referred to as touch screen collect user on it or neighbouring touch operation
(for example user uses any suitable objects or attachment such as finger, stylus on touch panel 1071 or in touch panel 1071
Neighbouring operation), and corresponding attachment device is driven according to preset formula.Touch panel 1071 may include touch detection
Two parts of device and touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation band
The signal come, transmits a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and by it
It is converted into contact coordinate, then gives processor 110, and order that processor 110 is sent can be received and executed.In addition, can
To realize touch panel 1071 using multiple types such as resistance-type, condenser type, infrared ray and surface acoustic waves.In addition to touch panel
1071, user input unit 107 can also include other input equipments 1072.Specifically, other input equipments 1072 can wrap
It includes but is not limited in physical keyboard, function key (such as volume control button, switch key etc.), trace ball, mouse, operating lever etc.
It is one or more, do not limit herein specifically.
Further, touch panel 1071 can cover display panel 1061, when touch panel 1071 detect on it or
After neighbouring touch operation, processor 110 is sent to determine the type of touch event, is followed by subsequent processing device 110 according to touch thing
The type of part provides corresponding visual output on display panel 1061.Although in fig. 2, touch panel 1071 and display panel
1061 be to realize the function that outputs and inputs of mobile terminal as two independent components, but in certain embodiments, can
The function that outputs and inputs of mobile terminal is realized so that touch panel 1071 and display panel 1061 is integrated, is not done herein specifically
It limits.
Interface unit 108 be used as at least one external device (ED) connect with mobile terminal 20 can by interface.For example, outer
Part device may include wired or wireless headphone port, external power supply (or battery charger) port, wired or wireless
Data port, memory card port, for connect the port of device with identification module, the port audio input/output (I/O),
Video i/o port, ear port etc..Interface unit 108 can be used for receiving the input from external device (ED) (for example, data
Information, electric power etc.) and by one or more elements that the input received is transferred in mobile terminal 20 or can use
In the transmission data between mobile terminal 20 and external device (ED).
Memory 109 can be used for storing software program and various data.Memory 109 can include mainly storing program area
And storage data field, wherein storing program area can storage program area, application program (such as the sound needed at least one function
Sound playing function, image player function etc.) etc.；Storage data field can store according to mobile phone use created data (such as
Audio data, phone directory etc.) etc..In addition, memory 109 may include high-speed random access memory, can also include non-easy
The property lost memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Processor 110 is the control centre of mobile terminal, utilizes each of various interfaces and the entire mobile terminal of connection
A part by running or execute the software program and/or module that are stored in memory 109, and calls and is stored in storage
Data in device 109 execute the various functions and processing data of mobile terminal, to carry out integral monitoring to mobile terminal.Place
Reason device 110 may include one or more processing units；Preferably, processor 110 can integrate application processor and modulatedemodulate is mediated
Manage device, wherein the main processing operation system of application processor, user interface and application program etc., modem processor is main
Processing wireless communication.It is understood that above-mentioned modem processor can not also be integrated into processor 110.
Mobile terminal 20 further includes the power supply 111 powered to all parts, power supply 111 can by power-supply management system with
Processor 110 is logically contiguous, to realize the functions such as management charging, electric discharge and power managed by power-supply management system.
Although Fig. 4 is not shown, mobile terminal 20 can also be including bluetooth module etc., and details are not described herein.
Referring to Fig. 5, it is the circuit block diagram of 20 1 embodiment of mobile terminal of the present invention.
In the present embodiment, mobile terminal 20 includes processor 210, USB interface 230a, power supply pin feet VCC and USB
Force download circuit 10.USB force downloads circuit 10 includes switching circuit 100, forces to start pin FORCE_USB_ from USB
BOOT, power pins VREG_L13A_1P8 and ID pin USB_HS_ID.Pressure in processor 210 starts pin feet from USB
GPIO_1 is electrically connected to pressure and starts pin FORCE_USB_BOOT from USB, and power supply pin feet VCC is electrically connected to power pins
VREG_L13A_1P8.USB interface 230a includes that ID pin feet USB_ID, ID pin feet USB_ID is electrically connected to ID pins USB_
HS_ID。
In the present embodiment, switching circuit 100 includes first end A, second end B and third end C.It forces to draw from USB startups
Foot FORCE_USB_BOOT is electrically connected to second end B, and power pins VREG_L13A_1P8 is electrically connected to third end C, ID pin
USB_HS_ID is electrically connected to first end A.In the present embodiment, described to force to start pin FORCE_USB_BOOT from USB to be to sentence
Whether disconnected mobile terminal executes the pin of force download instruction.It forces to be specifically defined from USB startups pin FORCE_USB_BOOT
It is as follows：
When mobile terminal is in normal condition, the CPU acquiescences of mobile terminal can start from EMMC, you can pass through USB numbers
Computer is connected according to line mode and downloads program, but (program of EMMC itself is asked when mobile terminal processor is in abnormality
Topic is damaged by uncertain factor, leads to not complete startup or None- identified port), it needs to use force download mode
Download program.Download method be will force from USB startup pin FORCE_USB_BOOT draw high to power level (power level with
For 1.8V), burning program can be executed automatically into force download pattern by inserting in USB preprocessors.
In the present embodiment, when mobile terminal 20 accesses special USB data line, the level of ID pin feet VCC is height
Level, switching circuit 100 are connected, and force to start pin FORCE_USB_BOOT and power pins VREG_L13A_1P8 from USB
Short circuit, mobile terminal 20 execute the instruction of force download.In the present embodiment, the special USB data line is a kind of tool
There are ID pin feet, and the data line that ID pin feet are connected with power supply pin feet.When mobile terminal 20 accesses normal USB data line
When, the level of ID pin feet VCC is low level, and switching circuit 100 is not turned on, and mobile terminal 20 executes normal download and passed with data
Defeated instruction.In the present embodiment, special USB data line is a kind of data line that ID pin feet are hanging.
In the present embodiment, pin FORCE_USB_ is started from USB by pressure originally reserved in the prior art
Switching circuit 100 and an ID pin USB_HS_ID are added between BOOT and power pins VREG_L13A_1P8 test points,
So that when ID pins USB_HS_ID accesses a high level, the switching circuit 100 conducting, so that the pressure is opened from USB
Dynamic pin FORCE_USB_BOOT and power pins VREG_L13A_1P8 short circuits, to which mobile terminal can enter under pressure
Load pattern.The present embodiment is forced to start pin FORCE_USB_BOOT from USB by controlling the conducting of switching circuit 100 to control
And power pins VREG_L13A_1P8 short circuits, so as to without exposing the pressure by way of punching or tearing machine open
Start pin FORCE_USB_BOOT and power pins VREG_L13A_1P8 from USB, it is easy to operate, and can improve
Efficiency.
Referring to Fig. 6, it is the circuit block diagram of another embodiments of mobile terminal 20a of the present invention.
As shown in fig. 6, in the present embodiment, mobile terminal 20 includes processor 210, USB interface 230a, power supply pin feet
VCC and USB force download circuits 10a.USB force download circuits 10a includes transistor Q1, resistance R, forces to start from USB
Pin FORCE_USB_BOOT, power pins VREG_L13A_1P8 and ID pin USB_HS_ID.The first end of transistor Q1
ID pin USB_HS_ID are electrically connected to, the second end of transistor Q1 is electrically connected to pressure and starts pin FORCE_USB_ from USB
The third end of BOOT, transistor Q1 are electrically connected to power pins VREG_L13A_1P8.One end of resistance R is electrically connected to transistor
The first end of Q1, the other end ground connection of resistance R.In a physical circuit, which starts pin FORCE_USB_BOOT from USB
Start pin feet from USB with the pressure in mobile terminal to connect, the electricity in power pins VREG_L13A_1P8 and mobile terminal
Source PIN foot connection, the ID pins USB_HS_ID are connected with the ID pin feet in USB interface in mobile terminal.In present embodiment
In, when the level of ID pins USB_HS_ID is high level, transistor Q1 conductings are forced to start pin FORCE_USB_ from USB
BOOT and power pins VREG_L13A_1P8 short circuits, mobile terminal can enter force download pattern.
In a specific embodiment, transistor Q1 manages for N-MOS, and the grid G of the N-MOS pipes is as transistor Q1's
First end, the second end of the source Ss of the N-MOS pipes as the transistor Q1, the drain D of the N-MOS pipes is as crystal
The third end of pipe Q1.It is understood that in other embodiment of the present invention, transistor Q1 may be P-MOS pipes, NPN
Type triode or PNP type triode etc..
In the present embodiment, when mobile terminal 20 accesses special USB data line, the level of ID pin feet VCC is height
Level, switching circuit 100 are connected, and force to start pin FORCE_USB_BOOT and power pins VREG_L13A_1P8 from USB
Short circuit, mobile terminal 20 execute the instruction of force download.In the present embodiment, the special USB data line is a kind of tool
There are ID pin feet, and the data line that ID pin feet are connected with power supply pin feet.When mobile terminal 20 accesses normal USB data line
When, the level of ID pin feet VCC is low level, and switching circuit 100 is not turned on, and mobile terminal 20 executes normal download and passed with data
Defeated instruction.In the present embodiment, special USB data line is a kind of data line that ID pin feet are hanging.
Referring to Fig. 7, its flow diagram for the first embodiment of USB force downloads method of the present invention.
In the present embodiment, which is applied to mobile terminal 20, and mobile terminal 20 accesses special
USB data line.The control method includes the following steps：
S701 detects the level for forcing to start pin feet from USB；
Specifically, mobile terminal 20 includes under processor 210, USB interface 230a, power supply pin feet VCC and USB pressure
Carry circuit 10.USB force downloads circuit 10 includes switching circuit 100, forces to start pin FORCE_USB_BOOT, electricity from USB
Source pin VREG_L13A_1P8 and ID pin USB_HS_ID.Pressure in processor 210 starts pin feet GPIO_1 from USB
It is electrically connected to pressure and starts pin FORCE_USB_BOOT from USB, power supply pin feet VCC is electrically connected to power pins VREG_
L13A_1P8.USB interface 230a includes that ID pin feet USB_ID, ID pin feet USB_ID is electrically connected to ID pins USB_HS_ID.
Detection is forced to start whether the level of pin feet is preset value from USB by detection in real time, in the present embodiment,
The preset value is high level, it is to be understood that in other embodiments, which may be low level.Pass through reality
When detect the pressure from USB start pin feet level, so as to judge whether to need in time enter force download pattern.
S702 executes the instruction of force download when the level for detecting that the USB starts pin feet is high level.
Specifically, it forces to be defined as follows from USB startup pins：
When mobile terminal is in normal condition, the CPU acquiescences of mobile terminal can start from EMMC, you can pass through USB numbers
Computer is connected according to line mode and downloads program, but (program of EMMC itself is asked when mobile terminal processor is in abnormality
Topic is damaged by uncertain factor, leads to not complete startup or None- identified port), it needs to use force download mode
Download program.Download method is that will force to draw high to power level (power level is by taking 1.8V as an example) from USB startup pins, is inserted
Burning program can be executed in USB preprocessors automatically into force download pattern.
In the present embodiment, when mobile terminal accesses special USB data line, it can detect that USB starts pin feet
Level be high level, then execute force download instruction.
Step S703 executes normal download when the level for detecting the pressure from USB startup pin feet is low level
With the instruction of data transmission.
Specifically, when accessing normal USB data line, it will detect that the level for starting pin feet from USB is low level,
When detecting low level, it was demonstrated that mobile terminal no exceptions can be downloaded normally and data transmission.
When in the present embodiment, by being inserted into special USB data line, force to draw with the power supply from USB startup pins
Foot short circuit, so that the mobile terminal execution force download instructs, it is without tearing machine or punching open that reserved test point is sudden and violent
Reveal, the mode of short circuit could execute force download instruction later, easy to operate, improve download efficiency.
Referring to Fig. 8, its structural schematic diagram for an embodiment of the first USB interface of USB data line of the present invention.
In the present embodiment, which is applied in mobile terminal 20.
The USB data line 40 includes：First USB interface, secondary USB interface, the first USB interface and secondary USB interface are logical
Data line connection is crossed, the first USB interface is the interface for accessing mobile terminal 20, and the first USB interface includes power supply pin foot VBUS,
It is grounded pin foot GND, the positive pin feet D+ of data line, data line bears pin feet D-, ID pin feet ID1, ID pin feet ID1 and power supply pin
Foot VBUS connections.
It should be noted that herein, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that article or device including a series of elements include not only those elements, but also includes not having
There is the other element being expressly recited, or further includes for this article or the intrinsic element of device.Do not limiting more
In the case of system, the element that is limited by sentence "including a ...", it is not excluded that in article or device including the element
In there is also other identical elements.
The embodiments of the present invention are for illustration only, can not represent the quality of embodiment.
It these are only the preferred embodiment of the present invention, be not intended to limit the scope of the invention, it is every 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 USB force downloads circuit, which is characterized in that the USB force downloads circuit includes：
Switching circuit, the switching circuit include first end, second end and third end；
It forces to start pin from USB, is electrically connected to the second end；
Power pins are electrically connected to the third end；
ID pins are electrically connected to the first end；
Wherein, described to force to start pin and the power pins short circuit from USB when the switching circuit is connected.
2. USB force downloads circuit as described in claim 1, which is characterized in that the switching circuit includes：
The first end of transistor, the transistor is electrically connected to the ID pins, and the second end of the transistor is electrically connected to institute
It states pressure and starts pin from USB, the third end of the transistor is electrically connected to the power pins；
Resistance, one end are electrically connected to the first end of the transistor, other end ground connection.
3. USB force downloads circuit as claimed in claim 2, it is characterised in that：The transistor is managed for N-MOS, the N-
First end of the grid of metal-oxide-semiconductor as the transistor, the second end of the source electrodes of the N-MOS pipes as the transistor, institute
State third end of the drain electrode of N-MOS pipes as the transistor.
4. USB force downloads circuit as claimed in claim 2, it is characterised in that：
When the level of the ID pins is high level, the transistor turns are described to force to start pin and the electricity from USB
Source pin short circuit.
5. a kind of mobile terminal, which is characterized in that including processor, USB interface, power supply pin feet, and such as Claims 1-4
USB force download circuits described in item any one；
The pressure of the processor starts pin feet from USB and is electrically connected to described force from USB startup pins；
The power supply pin feet are electrically connected to the power pins；
The USB interface includes ID pin feet, and the ID pin feet in the USB interface are electrically connected to the ID pins.
6. mobile terminal as claimed in claim 5, it is characterised in that：
When the mobile terminal accesses special USB data line, the level of the ID pin feet is high level, the switch electricity
Road is connected, described to force to start pin and the power pins short circuit, the finger of the mobile terminal execution force download from USB
It enables, wherein the ID pin feet in the special USB data line are connected with power supply pin feet.
7. mobile terminal as claimed in claim 6, it is characterised in that：
When the mobile terminal accesses normal USB data line, the level of the ID pin feet is low level, the switch electricity
Road is not turned on, and the mobile terminal execution is normally downloaded and the instruction of data transmission, wherein in the normal USB data line
ID pin feet it is hanging.
8. a kind of USB force downloads method is applied to the mobile terminal as described in claim 5 to 7 any one, feature
It is, includes the following steps：
Detect the level for forcing to start pin feet from USB；
When the level for detecting that the USB starts pin feet is high level, the instruction of force download is executed.
9. USB force downloads method as claimed in claim 8, which is characterized in that when detect it is described force from USB start
When the level of pin feet is low level, the normal instruction downloaded with data transmission is executed.
10. a kind of USB data line is applied to the mobile terminal as described in claim 5 to 7 any one, which is characterized in that
Including：First USB interface, secondary USB interface, first USB interface are connected with the secondary USB interface by data line,
First USB interface is the interface for accessing the mobile terminal, and first USB interface includes power supply pin feet, is grounded pin
Foot, the positive pin feet of data line, data line bear pin feet, ID pin feet, and the ID pin feet are connect with the power supply pin feet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810684814.XA CN108647160A (en) | 2018-06-28 | 2018-06-28 | USB force downloads circuit, mobile terminal, method for down loading and data line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810684814.XA CN108647160A (en) | 2018-06-28 | 2018-06-28 | USB force downloads circuit, mobile terminal, method for down loading and data line |
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| CN108647160A true CN108647160A (en) | 2018-10-12 |
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| CN109742608A (en) * | 2018-12-19 | 2019-05-10 | 努比亚技术有限公司 | A connection line and a method for processing downtime of a mobile terminal |
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