CN104330984A - Portable terminal capable of preventing automatic startup and method thereof - Google Patents
Portable terminal capable of preventing automatic startup and method thereof Download PDFInfo
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- CN104330984A CN104330984A CN201310441633.1A CN201310441633A CN104330984A CN 104330984 A CN104330984 A CN 104330984A CN 201310441633 A CN201310441633 A CN 201310441633A CN 104330984 A CN104330984 A CN 104330984A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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Abstract
The invention discloses a portable terminal capable of preventing automatic startup and a method thereof. The portable terminal comprises an interface unit for connecting with an external device; a power management module starting unit for triggering a power management module to start up when the interface unit receives an input voltage; a first voltage detection unit for detecting whether the input voltage of the interface unit is smaller than a charging effective voltage when the power management module starts up; a second voltage detection unit for detecting whether the input voltage of the interface unit is smaller than a preset voltage when the input voltage is smaller than the charging effective voltage; and a control unit for controlling the portable terminal to power off when the input voltage is smaller than the preset voltage, or otherwise, control the portable terminal to start up.
Description
Technical field
The present invention relates to portable terminal, particularly relate to the portable terminal and the method thereof that prevent Auto Power On of the phenomenon of the portable terminal Auto Power On caused because of the USB terminal pulling up Charger (portable round) or be connected to portable terminal when can prevent portable terminal from completing charging in the power-offstate.
Background technology
Along with the intelligentized of electronic product is popularized, people use the frequency of intelligentized portable terminal sharply to increase, but the battery capacity of portable terminal of today can not meet the daily need of people, therefore the user of portable terminal needs often to perform charging operations.
Usually, start-up mode under the off-mode of portable terminal is divided into two kinds, a kind of is button start, namely when user presses the starting key of portable terminal, the power management module of terminal inner carries out this sensing and normal boot-strap, and another kind of is test connecting line Auto Power On, and namely terminal inner is provided with Auto Power On logical circuit, when test connecting line is inserted into terminal, normal boot-strap can be carried out by triggering voltage administration module.
Distinguish according to function and be, the connecting line of portable terminal can comprise electric power connection line and test connecting line.Now, the input voltage (V of electric power connection line
bUSvoltage) be generally 5V, and the charging effective voltage of portable terminal (being such as 3.4V) is less than this input voltage.Further, the input voltage (VBUS voltage) testing connecting line is all less than the charging effective voltage of portable terminal usually.
Thus, when electric power connection line or test connecting line are connected to the portable terminal being in off-mode, according to the voltage signal from interface unit, power management module is triggered and detects input voltage, and the result of detection and charging effective voltage is compared.If input voltage (being such as 5V) is greater than charging effective voltage (being such as 3.4V), then effective register that charges is recorded as effectively, and terminal enters shutdown charge mode.If input voltage is less than charging effective voltage, then it is invalid that effective register that charges is recorded as, and terminal Auto Power On, enters test pattern.
But the power management module that current portable terminal adopts is disposable edging trigger effective (startup), and maintains starting state, and it does not consider the impact of pulse, causes portable terminal to there is following problem.
Namely, when charging in portable terminal off-mode, because part charger is after pulling up plug from socket, the output of charger can drop to 0V, if now electric power connection line and portable terminal still link together, then the energy of charger internal storage is after the output of charger is reduced to 0V, produce a pulse voltage (about 2V), cause the disposable edging trigger of power management module effective, and this pulse voltage usually all can lower than charging effective voltage, therefore the start logical circuit of portable terminal is judged as YES test start and makes portable terminal normal boot-strap.
Or, when extracting immediately after user inserts the plug of USB plug or charger to portable terminal, a momentary pulse can be produced, the disposable edging trigger of power management module can be caused equally effective, and this pulse voltage is lower than charging effective voltage, therefore the start logical circuit of portable terminal is judged as YES test start and makes portable terminal normal boot-strap.
Summary of the invention
The present invention proposes to solve the problem, its object is to provide a kind of and prevent the portable terminal of Auto Power On and the automatic power-on method under preventing off-mode under off-mode, it judges by carrying out secondary detection to the input voltage from interface unit the start that normal boot-strap or impulse disturbances cause exactly.
For the attainment of one's purpose, according to an aspect of the present invention, a kind of portable terminal preventing Auto Power On under off-mode being provided, comprising: interface unit, for being connected with external unit; Power management module start unit, starts for the triggering voltage administration module when described interface unit receives input voltage; First voltage detection unit, for after described power management module starts, whether the input voltage detecting described interface unit is less than charging effective voltage; Second voltage detection unit, when detecting that input voltage is less than charging effective voltage, whether the input voltage detecting described interface unit is less than predetermined voltage; Control module, when input voltage is less than predetermined voltage, controls portable terminal shutdown, otherwise, control portable terminal start.
Preferably, also comprise tertiary voltage detecting unit, this tertiary voltage detecting unit is arranged between described interface unit and described power management module start unit, produces output signal according to the input voltage that described interface unit receives.
Preferably, described tertiary voltage detecting unit comprises the first switch element for generation of switching signal, and described switching signal is as described output signal.
Preferably, described first switch element comprises the first link, the second link and control end, wherein, described first link is also connected to described power management module start unit while being connected on the first power supply by the first partial pressure unit, described second link ground connection, described control end is connected to described interface unit.
Preferably, described second voltage detection unit is connected to the rear end that described tertiary voltage detects detecting unit, and comprise second switch unit and the second partial pressure unit, the front end of described second switch unit is connected between the first link of described first switch element and described power management module start unit, also be connected on second source by the second partial pressure unit while the rear end of described second switch unit is connected to universal input/output terminal, the signal of described control module received by universal input/output terminal, controls portable terminal start/shutdown.
Preferably, the voltage of described first power supply is greater than the voltage of described second source.
Preferably, when described input voltage is less than the cut-in voltage of described first switch element, described second switch unit cut-off, described universal input/output terminal receives high level, thus portable terminal shuts down by described control module; When described input voltage is greater than the cut-in voltage of described first switch element, described second switch cell conduction, described universal input/output terminal receives low level, thus described control module is by portable terminal normal boot-strap.
Preferably, described second voltage detection unit is connected to the rear end that described tertiary voltage detects detecting unit, and comprise the 3rd partial pressure unit, channel modulus converter, wherein, the front end of described 3rd partial pressure unit is connected between the first link of described first switch element and described power management module start unit, described channel modulus converter is connected to the rear end of described 3rd partial pressure unit, the signal of described control module received by channel modulus converter, controls portable terminal start/shutdown.
Preferably, the partial pressure ratio of described 3rd partial pressure unit is greater than described first partial pressure unit.
Preferably, when described input voltage is less than the cut-in voltage of described first switch element, the detected value of described channel modulus converter is high level, thus portable terminal shuts down by described control module; When described input voltage is greater than the cut-in voltage of described first switch element, the detected value of described channel modulus converter is low level, thus described control module is by portable terminal normal boot-strap.
Preferably, described second voltage detection unit is connected to the front end that described tertiary voltage detects detecting unit, and comprise the 3rd switch element, wherein, 3rd switch element comprises the first link, second link and control end, described first link is also connected to universal input/output terminal while being connected on the 3rd power supply by the 4th partial pressure unit, described second link ground connection, described control end is connected between the control end of described interface unit and described first switch element, the signal of described control module received by universal input/output terminal, control portable terminal start/shutdown.
Preferably, when described input voltage is less than the cut-in voltage of described 3rd switch element, described universal input/output terminal receives high level, thus described portable terminal shuts down by described control module, when described input voltage is greater than the cut-in voltage of described 3rd switch element, described universal input/output terminal receives low level, thus described control module is by described portable terminal normal boot-strap.
Preferably, when the first voltage detection unit detects that described input voltage is less than charging effective voltage, detect input voltage after described second voltage detection unit delay scheduled time and whether be less than predetermined voltage.
Preferably, described power management module start unit, when receiving the switching signal of described tertiary voltage detecting unit, is started by disposable edging trigger.
Preferably, when described input voltage is less than charging effective voltage, it is invalid that effective for charging register is set to by described first voltage detection unit, otherwise effective for charging register is set to effectively by described first voltage detection unit.
Preferably, described first voltage detection unit comprises voltage comparison unit, in order to the size of more described input voltage with charging effective voltage.
For the attainment of one's purpose, according to a further aspect in the invention, provide a kind of method preventing Auto Power On under portable terminal off-mode, comprise the steps: that triggering voltage administration module starts when interface unit receives input voltage; After described power management module starts, detect the whether little charging effective voltage of input voltage of described interface unit; When detecting that input voltage is less than charging effective voltage, whether the input voltage detecting described interface unit is less than predetermined voltage; When input voltage is less than predetermined voltage, control portable terminal shutdown, otherwise, control portable terminal start.
Preferably, when interface unit receives input voltage, produce switching signal and start with triggering voltage administration module.
Preferably, when detecting that described input voltage is less than charging effective voltage, detecting input voltage after delay scheduled time and whether being less than predetermined voltage.
Preferably, when receiving switching signal, disposable edging trigger power management module starts.
Preferably, when described input voltage is less than charging effective voltage, it is invalid to be set to by effective for charging register, otherwise, effective for charging register is set to effectively.
According to the present invention, when charging under portable terminal off-mode, by the input voltage of point secondary detection interface unit, the start that normal boot-strap or impulse disturbances cause can be judged exactly.
Accompanying drawing explanation
Fig. 1 is the block diagram according to portable terminal of the present invention.
Fig. 2 is according to the schematic diagram preventing the first embodiment of automatic boot circuit of the present invention.
Fig. 3 is according to the schematic diagram preventing the second embodiment of automatic boot circuit of the present invention.
Fig. 4 is according to the schematic diagram preventing the 3rd embodiment of automatic boot circuit of the present invention.
Fig. 5 is according to the process flow diagram preventing the method for Auto Power On of the present invention.
Embodiment
Below, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is according to the block diagram preventing the portable terminal of Auto Power On of the present invention.
As shown in Figure 1, portable terminal according to the present invention comprises interface unit 100, power management module start unit 200, first voltage detection unit 300, second voltage detection unit 400, control module 500.
Interface unit 100 for portable terminal provides can the interface of the electric power connection line of connecting charger, external testing line or external data line, such as it can be USB interface.
Power management module start unit 200 triggering voltage administration module when interface unit 100 receives input voltage starts.Preferably, according to input voltage, disposable edging trigger starts this power management module.Therefore, even if by interface unit 100 input pulse interference voltage, this power management module is still likely triggered and starts.
Now, preferably, can also arrange tertiary voltage detecting unit 600 between interface unit 100 and power management module start unit 200, this tertiary voltage detecting unit 600 produces output signal according to the input voltage that interface unit 100 receives and exports to power management module start unit 200.
Preferably, described tertiary voltage detecting unit 600 comprises the first switch element, and in order to produce switching signal, this switching signal will as described output signal.Preferably, this first switch element is transistor.
One end of first voltage detection unit 300 is connected to interface unit 100 and detects the input voltage of interface unit 100, and the other end is connected to register 700.Now, this register 700 is the effective register of charging.And the effective register of this charging can be arranged at the inside of power management module.Preferably, the first voltage detection unit 300 comprises voltage comparison unit, and this voltage comparison unit compares the size of the charging effective voltage of input voltage and portable terminal.
Such as, portable terminal shutdown state under, when this input voltage (such as, VBUS voltage) be greater than charging effective voltage (such as, under the platform of high pass, this charging effective voltage is 3.4V) time, register 700 is set to effectively by the first voltage detection unit 300.Now, when portable terminal connecting charger electric power connection line, input voltage (such as, VBUS voltage) is generally 5V.And when input voltage described in this is less than charging effective voltage, it is invalid that register 700 is set to by the first voltage detection unit 300.
Second voltage detection unit 400 is when the first voltage detection unit 300 detects that input voltage is less than charging effective voltage, and whether the input voltage detecting interface unit 100 is less than predetermined voltage.Preferably, the second voltage detection unit 400 comprises voltage comparison unit, is compared the size of input voltage and predetermined voltage by this voltage comparison unit.
And, second voltage detection unit 400 can be arranged at front end or the rear end of tertiary voltage detecting unit 600, when being connected to the front end of tertiary voltage detecting unit 600, second voltage detection unit 400 can be made up of switch element, and when being connected to the rear end of tertiary voltage detecting unit 600, the second voltage detection unit 400 can be made up of switch element or partial pressure unit.
Preferably, when the second voltage detection unit 400 comprises switch element, described predetermined voltage can be the cut-in voltage of switch element.
Preferably, when the first voltage detection unit 300 detects that input voltage is less than charging effective voltage, detect input voltage after the second voltage detection unit 400 delay scheduled time and whether be less than predetermined voltage.Now, detect after making the second voltage detection unit 400 delay scheduled time by hardware mode or software mode.Hardware mode comprises and arranges delay circuit etc., and software mode comprises code delay etc., and these delayed modes belong to known technology field, thus no longer describe in detail this.And this schedule time sets when manufacturing portable terminal by experiment, such as, this schedule time should be greater than the duration of common momentary pulse voltage.Such as, the duration of common momentary pulse voltage is 100 milliseconds, and now the schedule time can be set to more than 1 second.
The first above-mentioned voltage detection unit 300, power management module start unit 200 and the equal accessible site of register are on power management module.
Control module 500, according to the judged result of the second voltage detection unit 400, when input voltage is less than predetermined voltage (being such as the cut-in voltage of switch element), controls portable terminal shutdown, otherwise, control portable terminal normal boot-strap.This control module 500 accessible site is on the master chip (such as, CPU etc.) of portable terminal.
Fig. 2 to Fig. 4 is according to the schematic diagram preventing each embodiment of the circuit of Auto Power On under off-mode of the present invention.
Below, with reference to Fig. 2 to Fig. 4, the circuit of Auto Power On under off-mode and the method for preventing of the present invention is described in detail.
Fig. 2 is according to the schematic diagram preventing the first embodiment of the circuit of Auto Power On under off-mode of the present invention.
Tertiary voltage detecting unit 600 can comprise the first switch element Q1.Preferably, this first switch element Q1 is active component, and its control end is connected to interface unit 100, and the first link is connected on the first power supply by the first partial pressure unit, the second link ground connection.Wherein, the first partial pressure unit R1 can be resistor R1, and the first power supply is battery (V_BATTERY).Preferably, the first switch element Q1 is the transistor of triode and so on.
And, in the present embodiment, first voltage detection unit 300 and power management module start unit 200 accessible site are on power management module 20, wherein, the first link that interface unit 100 is connected to the first voltage detection unit 300, first switch element Q1 is connected to power management module start unit 200.
At this, first switch element Q1, resistor R1 and power management module 20 can form the start logical circuit of a portable terminal, thus when after the voltage of applying on VBUS, first switch element Q1 is unlocked, cause the power management module start unit 200 be connected with first link of the first switch element Q1 to receive switching signal, thus power management module 20 is opened.
Now, the the first voltage detection unit 300 pairs of input voltages being integrated in power management module 20 detect and compare, when input voltage lower than charging effective voltage (such as, being 3.4V under high-pass platform) time, automatically the register of power management module 20 inside is set to effectively; Otherwise, if input voltage is higher than threshold value, then the automatic register by power management module 20 inside be set to invalid.
Second voltage detection unit 400 is connected to the rear end that tertiary voltage detects detecting unit 600, namely, between the first link being connected to the first switch element Q1 and power management module start unit, and comprise the second switch cells D 1 between the first link and power management module start unit and the second partial pressure unit R2 that are connected to described first switch element Q1.Specifically, the front end of second switch cells D 1 is connected between the first link of the first switch element and power management module start unit, the rear end of second switch cells D 1 is connected to universal input/output terminal (GPIO), is also connected on second source (VDD) by the second partial pressure unit R2 simultaneously.Wherein, the voltage of the first power supply is greater than the voltage of this second source.And universal input/output terminal can be arranged on power management module or master chip.Further, this second partial pressure unit R2 can be resistor.
The signal that control module 500 receives according to universal input/output terminal, controls portable terminal start/shutdown.
Preferably, second switch cells D 1 is diode or triode, or has the various transistors of switching function.
Thus, the second voltage detection unit 400 is when the first voltage detection unit 300 detects that input voltage is less than charging effective voltage, and whether the input voltage detecting interface unit 100 is less than the cut-in voltage of the first switch element Q1.
Preferably, whether the input voltage that the second voltage detection unit 400 detects described interface unit 100 after (such as, being greater than the duration of pulse voltage) is after a predetermined time less than predetermined voltage (such as, the cut-in voltage of switch element).So, the second voltage detection unit 400 can be eliminated the impact of pulse voltage and detect exactly input voltage.
The course of work of described second voltage detection unit 400 is as follows.
When the first voltage detection unit 300 detects that input voltage is less than charging effective voltage, when input voltage is less than the cut-in voltage of the first switch element Q1, first switch element Q1 maintains and closes, according to the first power supply being connected to the first link by the first partial pressure unit R1, power management module start unit 200 input high level be connected with first link of the first switch element Q1.And, as mentioned above, voltage due to the first power supply is greater than the voltage of second source, the second switch cells D 1 be connected to accordingly between first link of the first switch element Q1 and power management module start unit 200 is ended, according to second source and the second partial pressure unit R2, general output/output processor 203 receives high level, thus portable terminal shuts down by final control module 500.
And, when input voltage is greater than the cut-in voltage of the first switch element Q1, first switch element Q1 is unlocked, thus the power management module start unit 200 be connected with first link of the first switch element Q1 receives low level, be connected to second switch cells D 1 conducting between first link of the first switch element Q1 and power management module start unit 200 accordingly, universal input/output terminal 203 receives low level, thus control module 500 makes portable terminal start shooting, and enter test pattern.
Thus, after the first voltage detection unit 300 first time detected the input voltage of interface unit 100, by the input voltage making the second voltage detection unit 400 detect interface unit 100 after a predetermined time after (delay), thus when the voltage of interface unit 100 place input is momentary pulse voltage, if secondary detects input voltage after a predetermined time, then now the voltage of secondary detection will be 0V, it is less than the cut-in voltage of the first switch element Q1, therefore described above, portable terminal is maintained off-mode by control module 500, can effectively avoid under off-mode because of start unintentionally that momentary pulse voltage causes.
At this, the time of usual pulse persistance is approximately 100 milliseconds, and therefore the described schedule time only need be greater than this duration of pulse, and such as this schedule time can be 1 second.
Fig. 3 is according to the schematic diagram preventing the second embodiment of the circuit of Auto Power On under off-mode of the present invention.Wherein, about the formation of tertiary voltage detecting unit 600 and power management module 20 and the course of work identical with the first above-mentioned embodiment, therefore the repetitive description thereof will be omitted.
Second voltage detection unit 400 is connected to the rear end that tertiary voltage detects detecting unit 600, namely, on the first link being connected to the first switch element Q1 and between power management module start unit, and comprise the 3rd partial pressure unit R3 of the first link being connected to described first switch element Q1, be connected to the channel modulus converter ADC of the 3rd partial pressure unit R3.Wherein, the 3rd partial pressure unit R3 can be resistor.
Preferably, channel modulus converter ADC is integrated on power management module 20 or master chip.This channel modulus converter ADC can directly read concrete magnitude of voltage, can the state of monitoring power supply administration module start unit 200 accurately, thus can prevent from opening by mistake machine.
The course of work of second voltage detection unit 400 of the present embodiment is as follows.
When the first voltage detection unit 300 detects that input voltage is less than charging effective voltage, when input voltage is less than the cut-in voltage of the first switch element Q1, first switch element Q1 maintains and closes, therefore the power management module start unit 200 be connected with first link of the first switch element Q1 receives high level, meanwhile, the detected value of the channel modulus converter ADC be connected between first link of the first switch element Q1 and power management module start unit 200 by the 3rd partial pressure unit R3 is also in high level, thus portable terminal shuts down according to the testing result of channel modulus converter ADC by control module 500.
And, when input voltage is greater than the first switch element Q1 cut-in voltage, first switch element Q1 is unlocked, therefore the power management module start unit 200 be connected with first link of the first switch element Q1 receives low level, meanwhile, the detected value of the channel modulus converter ADC be connected between first link of the first switch element Q1 and power management module start unit 200 by the 3rd partial pressure unit R3 is low level, thus control module 500 makes portable terminal start shooting according to the testing result of channel modulus converter ADC, and enter test pattern.
Thus, after the first voltage detection unit 300 first time detected the input voltage of interface unit 100, by the input voltage making the second voltage detection unit 400 detect interface unit 100 after a predetermined time again, thus when the voltage of interface unit 100 place input is pulse voltage, if secondary detection input voltage after a predetermined time, then now the input voltage of secondary detection becomes 0V, it is less than the cut-in voltage of the first switch element Q1, therefore described above, portable terminal is maintained off-mode by control module 500, can effectively avoid under off-mode because of start unintentionally that momentary pulse voltage causes.
Fig. 4 is according to the schematic diagram preventing the 3rd embodiment of the circuit of Auto Power On under off-mode of the present invention.Wherein, about the formation of tertiary voltage detecting unit 600 and power management module 20 and the course of work identical with the first above-mentioned embodiment, therefore the repetitive description thereof will be omitted.
Second voltage detection unit 400 is connected to the front end that tertiary voltage detects detecting unit 600, that is, be connected between interface unit 100 and the control end of the first switch element Q1, and comprise the 3rd switch element Q2 of the control end being connected to this first switch element Q1.That is, the first switch element Q1 and the 3rd switch element Q2 is formed and is connected in parallel.
Preferably, 3rd switch element Q2 is active component, its control end is connected between interface unit 100 and the control end of the first switch element Q1, its first link is also connected to universal input/output terminal while being connected on second source by the 4th partial pressure unit R4, and the second link ground connection.Now, universal input/output terminal accessible site is on fulgurite administration module or master chip.Wherein, the 4th partial pressure unit R4 can be resistor R4, and the first power supply is battery (V_BATTERY).Preferably, the 3rd switch element Q1 is the transistor of triode and so on.
The course of work of second voltage detection unit 400 of the present embodiment is as follows.
When the first voltage detection unit 300 detects that input voltage is less than charging effective voltage, when the input voltage of interface unit 100 is less than the cut-in voltage of the 3rd switch element Q2,3rd switch element Q2 maintains closed condition, thus according to second source and the 4th partial pressure unit R4, universal input/the output terminal 203 being connected to first link of the 3rd switch element Q2 receives high level, thus portable terminal shuts down according to the signal of universal input/output terminal 203 by control module 500.
And, when the input voltage of interface unit 100 is greater than the cut-in voltage of the 3rd switch element Q2,3rd switch element Q2 is unlocked, universal input/the output terminal 203 be thus connected in first link of the 3rd switch element Q2 receives low level, thus control module 500 makes portable terminal normal boot-strap according to the signal of universal input/output terminal 203, and enter test pattern.
Thus, after the first voltage detection unit 300 first time detected the input voltage of interface unit 100, by the input voltage making the second voltage detection unit 400 detect interface unit 100 after a predetermined time for the second time, thus when the voltage of interface unit 100 place input is pulse voltage, if again detect input voltage after a predetermined time, the voltage then now detected will become 0V, it is less than the cut-in voltage of the 3rd switch element Q2, therefore described above, portable terminal is maintained off-mode by control module 500, can effectively avoid under off-mode because of start unintentionally that momentary pulse voltage causes.
Below, with reference to Fig. 5, the method for Auto Power On that prevents of portable terminal according to the present invention is described.Fig. 5 is according to the process flow diagram preventing the method for Auto Power On of the present invention.
Under the state that portable terminal is in shutdown (step 500), first, in step 501, the start that key causes or the start that connecting test connecting line causes is determined whether.The judged result of step 501, if the start that key causes, then the power management module 200 that control module 400 controls portable terminal is started shooting.
If the judged result of step 501, it not the start that key causes, but in interface unit, insert connecting line (electric power connection line, test connecting line) start that causes, then when interface unit receives input voltage, triggering voltage administration module starts and enters step 503, in the first voltage detection unit, after power management module starts, detect the whether little charging effective voltage of input voltage of interface unit, when this input voltage is greater than charging effective voltage, register in power management module is set to effectively, control module 500 makes portable terminal shutdown charging (step 504), and when this input voltage is less than charging effective voltage, it is invalid to be set to by register, and enter step 505.
In step 505, in the second voltage detection unit 300, whether the input voltage detecting described interface unit is further less than predetermined voltage.When this input voltage is less than predetermined voltage, enter step 507, make control module that portable terminal is maintained shutdown, and when this input voltage is greater than predetermined voltage, enter step 506, make control module that portable terminal is started shooting, and enter test pattern.Wherein, described predetermined voltage can be the cut-in voltage of each switch element.
Preferably, in step 505, the second voltage detection unit 300 detects the input voltage of interface unit 100 after a predetermined time.Preferably, this schedule time is greater than 100 milliseconds.
Thus, input voltage is detected again after a predetermined time lapses by using the second voltage detection unit, thus when the voltage that interface unit receives is momentary pulse voltage, if second time detects input voltage after a predetermined time, then now detected voltage becomes 0V, therefore portable terminal is maintained off-mode by control module, effectively can avoid the improper start under off-mode accordingly.
Claims (21)
1. can prevent a portable terminal for Auto Power On under off-mode, it is characterized in that, comprising:
Interface unit, for being connected with external unit;
Power management module start unit, starts for the triggering voltage administration module when described interface unit receives input voltage;
First voltage detection unit, for after described power management module starts, whether the input voltage detecting described interface unit is less than charging effective voltage;
Second voltage detection unit, when detecting that input voltage is less than charging effective voltage, whether the input voltage detecting described interface unit is less than predetermined voltage;
Control module, when input voltage is less than predetermined voltage, controls portable terminal shutdown, otherwise, control portable terminal start.
2. portable terminal according to claim 1, it is characterized in that, also comprise tertiary voltage detecting unit, this tertiary voltage detecting unit is arranged between described interface unit and described power management module start unit, produces output signal according to the input voltage that described interface unit receives.
3. portable terminal according to claim 2, is characterized in that, described tertiary voltage detecting unit comprises the first switch element for generation of switching signal, and described switching signal is as described output signal.
4. portable terminal according to claim 3, it is characterized in that, described first switch element comprises the first link, the second link and control end, wherein, described first link is also connected to described power management module start unit while being connected on the first power supply by the first partial pressure unit, described second link ground connection, described control end is connected to described interface unit.
5. portable terminal according to claim 4, it is characterized in that, described second voltage detection unit is connected to the rear end that described tertiary voltage detects detecting unit, and comprise second switch unit and the second partial pressure unit, the front end of described second switch unit is connected between the first link of described first switch element and described power management module start unit, also be connected on second source by the second partial pressure unit while the rear end of described second switch unit is connected to universal input/output terminal, the signal of described control module received by universal input/output terminal, control portable terminal start/shutdown.
6. portable terminal according to claim 5, is characterized in that, the voltage of described first power supply is greater than the voltage of described second source.
7. portable terminal according to claim 5, it is characterized in that, when described input voltage is less than the cut-in voltage of described first switch element, described second switch unit cut-off, described universal input/output terminal receives high level, thus portable terminal shuts down by described control module;
When described input voltage is greater than the cut-in voltage of described first switch element, described second switch cell conduction, described universal input/output terminal receives low level, thus described control module is by portable terminal normal boot-strap.
8. portable terminal according to claim 4, it is characterized in that, described second voltage detection unit is connected to the rear end that described tertiary voltage detects detecting unit, and comprise the 3rd partial pressure unit, channel modulus converter, wherein, the front end of described 3rd partial pressure unit is connected between the first link of described first switch element and described power management module start unit, described channel modulus converter is connected to the rear end of described 3rd partial pressure unit, the signal of described control module received by channel modulus converter, control portable terminal start/shutdown.
9. portable terminal according to claim 8, is characterized in that, the partial pressure ratio of described 3rd partial pressure unit is greater than described first partial pressure unit.
10. portable terminal according to claim 8, it is characterized in that, when described input voltage is less than the cut-in voltage of described first switch element, the detected value of described channel modulus converter is high level, thus portable terminal shuts down by described control module;
When described input voltage is greater than the cut-in voltage of described first switch element, the detected value of described channel modulus converter is low level, thus described control module is by portable terminal normal boot-strap.
11. portable terminals according to claim 4, it is characterized in that, described second voltage detection unit is connected to the front end that described tertiary voltage detects detecting unit, and comprise the 3rd switch element, wherein, 3rd switch element comprises the first link, second link and control end, described first link is also connected to universal input/output terminal while being connected on the 3rd power supply by the 4th partial pressure unit, described second link ground connection, described control end is connected between the control end of described interface unit and described first switch element, the signal of described control module received by universal input/output terminal, control portable terminal start/shutdown.
12. portable terminals according to claim 11, is characterized in that, when described input voltage is less than the cut-in voltage of described 3rd switch element, described universal input/output terminal receives high level, thus described portable terminal shuts down by described control module,
When described input voltage is greater than the cut-in voltage of described 3rd switch element, described universal input/output terminal receives low level, thus described control module is by described portable terminal normal boot-strap.
13. portable terminals according to claim 1, it is characterized in that, when the first voltage detection unit detects that described input voltage is less than charging effective voltage, detect input voltage after described second voltage detection unit delay scheduled time and whether be less than predetermined voltage.
14. portable terminals according to claim 2, is characterized in that, described power management module start unit, when receiving the switching signal of described tertiary voltage detecting unit, is started by disposable edging trigger.
15. portable terminals according to claim 1, it is characterized in that, when described input voltage is less than charging effective voltage, it is invalid that effective for charging register is set to by described first voltage detection unit, otherwise effective for charging register is set to effectively by described first voltage detection unit.
16. portable terminals according to claim 1, is characterized in that, described first voltage detection unit comprises voltage comparison unit, in order to the size of more described input voltage with charging effective voltage.
17. 1 kinds of methods that can prevent Auto Power On under portable terminal off-mode, is characterized in that, comprise the steps:
When interface unit receives input voltage, triggering voltage administration module starts;
After described power management module starts, detect the whether little charging effective voltage of input voltage of described interface unit;
When detecting that input voltage is less than charging effective voltage, whether the input voltage detecting described interface unit is less than predetermined voltage;
When input voltage is less than predetermined voltage, control portable terminal shutdown, otherwise, control portable terminal start.
18. methods according to claim 17, is characterized in that, when interface unit receives input voltage, produce switching signal and start with triggering voltage administration module.
19. methods according to claim 17, is characterized in that, when detecting that described input voltage is less than charging effective voltage, detecting input voltage and whether being less than predetermined voltage after delay scheduled time.
20. methods according to claim 18, is characterized in that, when receiving switching signal, disposable edging trigger power management module starts.
21. methods according to claim 17, is characterized in that, when described input voltage is less than charging effective voltage, it is invalid to be set to by effective for charging register, otherwise, effective for charging register is set to effectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310441633.1A CN104330984B (en) | 2013-09-25 | 2013-09-25 | Prevent portable terminal and the method thereof of Auto Power On |
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| CN201310441633.1A CN104330984B (en) | 2013-09-25 | 2013-09-25 | Prevent portable terminal and the method thereof of Auto Power On |
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| CN104330984A true CN104330984A (en) | 2015-02-04 |
| CN104330984B CN104330984B (en) | 2016-10-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108650404A (en) * | 2018-04-08 | 2018-10-12 | 努比亚技术有限公司 | Port start-up circuit, device and mobile terminal |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101304568B (en) * | 2007-05-11 | 2011-09-21 | 中兴通讯股份有限公司 | Apparatus and method for charging mobile terminal |
| CN100536273C (en) * | 2007-09-12 | 2009-09-02 | 中兴通讯股份有限公司 | Terminal equipment charging overvoltage protective device and method |
| CN102122202B (en) * | 2011-03-01 | 2014-04-30 | 华为终端有限公司 | Method for automatically starting mobile terminal and mobile terminal |
| CN102496903B (en) * | 2011-11-15 | 2014-10-29 | 深圳桑达国际电子器件有限公司 | Over-current protection circuit, power supply circuit and power supply |
| CN102931964B (en) * | 2012-11-06 | 2016-10-05 | 上海摩软通讯技术有限公司 | Start control circuit |
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2013
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108650404A (en) * | 2018-04-08 | 2018-10-12 | 努比亚技术有限公司 | Port start-up circuit, device and mobile terminal |
| CN108650404B (en) * | 2018-04-08 | 2021-01-22 | 努比亚技术有限公司 | Port starting circuit, device and mobile terminal |
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| CN104330984B (en) | 2016-10-05 |
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