CN105652760B - The power protection system and method for single-chip microcontroller - Google Patents
The power protection system and method for single-chip microcontroller Download PDFInfo
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- CN105652760B CN105652760B CN201610195445.9A CN201610195445A CN105652760B CN 105652760 B CN105652760 B CN 105652760B CN 201610195445 A CN201610195445 A CN 201610195445A CN 105652760 B CN105652760 B CN 105652760B
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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
- G05B19/0428—Safety, monitoring
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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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21154—Over current protection
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Abstract
The invention discloses a kind of power protection system of single-chip microcontroller and methods.Wherein, which includes: control chip, single-chip microcontroller and external equipment, wherein control chip is electrically connected with single-chip microcontroller and external equipment respectively, for external input voltage to be converted to the first voltage of corresponding single-chip microcontroller and the second voltage of corresponding external equipment；Single-chip microcontroller is electrically connected, for receiving the first voltage after controlling chip transformation with control chip；External equipment is electrically connected, for receiving the second voltage after controlling chip transformation with control chip.The present invention is solved since the relevant technologies voltage monitoring circuit and watchdog circuit needs are individually designed, it is high to lead to design cost, and the technical problem that the area for occupying printing board PCB is big.
Description
Technical field
The present invention relates to electrical applications technical fields, power protection system and side in particular to a kind of single-chip microcontroller
Method.
Background technique
With the extensive utilization of singlechip technology, according to the 61508th article of agreement of International Electrotechnical Commission
The regulation of (InternationalElectrotechnical Commission, abbreviation IEC61508), in functional safety product
In, it is necessary to supply voltage and program operation to single-chip minimum system are monitored and are just able to satisfy security requirement.Related skill
The core power voltage of most of single-chip microcontroller is 1.2V or 1.8V in art, and I/O mouthfuls of supply voltages are 3.3V, and external power voltage is
5V, it is therefore desirable to which providing more specification safety power supplies for single-chip minimum system can just meet the requirements.Solution generally used now
Voltage conversion circuit, voltage monitoring circuit and window watchdog circuit three independent functional unit circuits are divided into come in fact
It is existing, when voltage monitoring circuit monitors electric voltage exception or house dog is overflowed, triggering is resetted into single-chip microcontroller.Specifically include following two
Kind technical solution, it is as depicted in figs. 1 and 2 respectively.
Fig. 1 is the structural schematic diagram of the working principle of the first related art scheme: using 3 independent voltage conversion electricity
The step voltage conversion of 24V to 5V, 5V to 3.3V, 3.3V to 1.2V are realized in road respectively.3 independent voltage monitoring circuits point
Not Jian Kong 5V, 3.3V and 1.2V under-voltage and overvoltage condition, reset single-chip microcontroller when monitored voltage occurs abnormal.Independent window
Mouth watch dog monitoring single-chip microcontroller intermediate range sort run, when single-chip microcontroller is not in designated time internal trigger house dog, house dog is overflowed multiple
Position single-chip microcontroller.
Fig. 2 is the structural schematic diagram of the working principle of second of related art scheme: using a piece of integrated voltage conversion
Device realizes that 24V to 5V, the conversion of 3.3V and 1.2V voltage, 3 independent voltage monitoring circuits monitor 5V, 3.3V and 1.2V respectively
Under-voltage and overvoltage condition resets single-chip microcontroller when monitored voltage occurs abnormal.In independent window watch dog monitoring single-chip microcontroller
Program operation, when single-chip microcontroller is not in designated time internal trigger house dog, house dog, which is overflowed, resets single-chip microcontroller.
For it is above-mentioned due to the relevant technologies voltage monitoring circuit and see doorway circuit need it is individually designed, lead to design cost
Height, and the problem that the area that occupies printing board PCB is big, currently no effective solution has been proposed.
Summary of the invention
The embodiment of the invention provides a kind of power protection system of single-chip microcontroller and methods, at least to solve due to related skill
Art voltage monitoring circuit and watchdog circuit needs are individually designed, it is high to lead to design cost, and occupy printing board PCB
The big technical problem of area.
According to an aspect of an embodiment of the present invention, a kind of power protection system of single-chip microcontroller is provided, comprising: control core
Piece, single-chip microcontroller and external equipment, wherein control chip is electrically connected with single-chip microcontroller and external equipment respectively, is used for external input
Voltage is converted to the first voltage of corresponding single-chip microcontroller and the second voltage of corresponding external equipment；Single-chip microcontroller is electrically connected with control chip
It connects, for receiving the first voltage after controlling chip transformation；External equipment is electrically connected with control chip, for receiving control core
Second voltage after piece transformation.
According to another aspect of an embodiment of the present invention, a kind of power protection method of single-chip microcontroller is additionally provided, comprising: will connect
The external input voltage received is converted to the first voltage of corresponding single-chip microcontroller and the second voltage of corresponding external equipment；Detection first
Whether voltage and second voltage match with preset standard, and preset standard is for detecting whether input voltage is single-chip microcontroller and external sets
Standby operating voltage；When detecting that first voltage and second voltage and preset standard mismatch, is sent to single-chip microcontroller and reset letter
Number, reset signal is resetted for control single chip computer.
In embodiments of the present invention, by the way of control integrated chip voltage monitoring and watchdog circuit, pass through control
Chip is electrically connected with single-chip microcontroller and external equipment respectively, for external input voltage to be converted to the first electricity of corresponding single-chip microcontroller
The second voltage of pressure and corresponding external equipment；Single-chip microcontroller be electrically connected, for receiving the after controlling chip transformation with control chip
One voltage；External equipment is electrically connected with control chip, for receiving the second voltage after controlling chip transformation, has reached reduction
The purpose of design cost saves pcb board design area to realize, and saves the technical effect of production design cost, and then solve
It has determined since the relevant technologies voltage monitoring circuit and watchdog circuit needs are individually designed, it is high to have led to design cost, and occupy
The big technical problem of the area of printing board PCB.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the working principle of the first related art scheme；
Fig. 2 is the structural schematic diagram of the working principle of second of related art scheme；
Fig. 3 is the structural schematic diagram of the power protection system of single-chip microcontroller according to an embodiment of the present invention；
Fig. 4 is a kind of structural schematic diagram of the power protection system of single-chip microcontroller according to an embodiment of the present invention；
Fig. 5 is the flow diagram of the power protection method of single-chip microcontroller according to an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
Embodiment 1
According to embodiments of the present invention, a kind of system embodiment of the power protection system of single-chip microcontroller is provided, Fig. 3 is basis
The structural schematic diagram of the power protection system of the single-chip microcontroller of the embodiment of the present invention, as shown in figure 3, the system includes: control chip
32, single-chip microcontroller 34 and external equipment 36, wherein
Chip 32 is controlled, is electrically connected respectively with single-chip microcontroller 34 and external equipment 36, for being converted to external input voltage
The second voltage of the first voltage of corresponding single-chip microcontroller 34 and corresponding external equipment 36；
Single-chip microcontroller 34 is electrically connected, for receiving the first voltage after controlling 32 transformation of chip with control chip 32；
External equipment 36 is electrically connected, for receiving the second voltage after controlling 32 transformation of chip with control chip 32.
From the foregoing, it will be observed that the power protection system of single-chip microcontroller provided by the embodiments of the present application can be applied to single-chip microcontroller minimum
Supply voltage and the program operation of system are monitored, and are different from the relevant technologies, such as Fig. 1 and the relevant technologies shown in Fig. 2, this
Apply for that the power protection system for the single-chip microcontroller that embodiment provides can carry out transformation to external input voltage by control chip 32
And the voltage after transformation can be monitored, so that the first voltage that control chip 32 exports can satisfy single-chip microcontroller 34
With the operating voltage (that is, first voltage and second voltage that the embodiment of the present application is mentioned) of external equipment 36, so as to avoid phase
In the technology of pass due to the relevant technologies voltage monitoring circuit and watchdog circuit need it is individually designed, caused design cost it is high and
The big problem of the plate face layout area occupied of printed circuit pcb board, and then saved design cost and each device institute on pcb board
The area accounted for.
In the power protection system of single-chip microcontroller provided by the embodiments of the present application, using control integrated chip voltage monitoring and see
The mode of door dog circuit is electrically connected with single-chip microcontroller and external equipment, by controlling chip for turning external input voltage respectively
It is changed to the first voltage of corresponding single-chip microcontroller and the second voltage of corresponding external equipment；Single-chip microcontroller is electrically connected with control chip, is used for
First voltage after receiving control chip transformation；External equipment is electrically connected with control chip, after receiving control chip transformation
Second voltage, achieved the purpose that reduce design cost, thus realize save pcb board design area, save production design
The technical effect of cost, and then solve since the relevant technologies voltage monitoring circuit and watchdog circuit needs are individually designed, it leads
It is high to cause design cost, and the technical problem that the area for occupying printing board PCB is big.
Fig. 4 is a kind of structural schematic diagram of the power protection system of single-chip microcontroller according to an embodiment of the present invention, such as Fig. 4 institute
Show, the power protection system of single-chip microcontroller provided by the embodiments of the present application is specific as follows:
Optionally, control chip 32 includes: voltage conversion circuit 321 and voltage monitoring circuit 322, wherein
Voltage conversion circuit 321 is electrically connected with the power end of single-chip microcontroller 34 and external equipment 36 respectively, and being used for will be external defeated
Enter voltage and is converted to the first voltage of corresponding single-chip microcontroller 34 and the second voltage of corresponding external equipment 36；
Voltage monitoring circuit 322 is electrically connected with voltage conversion circuit 321, for detecting the output of voltage conversion circuit 321
Whether first voltage and second voltage reach preset standard, and whether preset standard is single-chip microcontroller 34 and outer for detecting input voltage
Connect the operating voltage of equipment 36.
Specifically, in control chip 32 provided by the embodiments of the present application, the input terminal of voltage conversion circuit 321 with it is external defeated
Enter power electric connection, the output end of voltage conversion circuit 321 is electrically connected with external equipment 36 and single-chip microcontroller 34 respectively, such as Fig. 4 institute
Showing, the input terminal of voltage conversion circuit 321 is after the voltage input for receiving 24V, by transformation, external equipment in the voltage of output
36 input voltage is 5V, and the input voltage of single-chip microcontroller 34 is 3.3V and 1.2V, that is, the voltage conversion circuit in control chip 32
321 according to external equipments 36 and single-chip microcontroller 34 voltage input demand, by external input power output external input voltage into
Row transformation obtains the output voltage (first voltage i.e. provided by the embodiments of the present application and that meet external equipment 36 and single-chip microcontroller 34
Two voltages)；
To ensure that first voltage and the second voltage of the output of voltage conversion circuit 321 are single-chip microcontroller 34 and external equipment 36
Operating voltage is (that is, the first voltage and provided by the embodiments of the present application exported by preset standard to voltage conversion circuit 321
Two voltages are detected), voltage monitoring circuit 322, which passes through, in control chip 32 provided by the embodiments of the present application converts electricity with voltage
Road 321 is electrically connected, and is detected to the voltage of the voltage conversion circuit 321 output, to ensure what voltage conversion circuit 321 exported
Voltage is due to excessively high caused damage single-chip microcontroller 34 and external equipment 36, or, after finding 321 transformation of voltage conversion circuit in time
The voltage of output cannot drive external equipment 36 and single-chip microcontroller 34 as caused by brownout.Voltage monitoring circuit 322 ensures
Voltage conversion circuit 321 in control chip 32 whether can reach after carrying out transformation to external input voltage meet it is external
The demand of equipment 36 and single-chip microcontroller 34, and guarantee is provided to whether external equipment 36 and single-chip microcontroller 34 can be used safely.
Here since the core power voltage of most of single-chip microcontroller is 1.2V or 1.8V, I/O mouthfuls of supply voltages are 3.3V, outside
If supply voltage is 5V, it is therefore desirable to which providing more specification safety power supplies for single-chip minimum system can just meet the requirements, the application
Embodiment provide control chip 32 in voltage conversion circuit 321 output voltage in first voltage export respectively 3.3V with
1.2V, second voltage export 5V, that is, the input voltage of the I/O mouth of single-chip microcontroller 34 is 3.3V (that is, end VCC1 shown in Fig. 4), singly
The core power voltage of piece machine 34 is 1.2V (that is, end VCC2 shown in Fig. 4), and the input voltage of external equipment 36 is 5V.It needs
Illustrating, the power protection system of single-chip microcontroller provided by the embodiments of the present application is only illustrated by taking above-mentioned output voltage as an example,
It is subject to the power protection system for realizing single-chip microcontroller provided by the embodiments of the present application, specifically without limitation.
Further, optionally, voltage conversion circuit 321 includes: current/direct-current conversion device 3211 and voltage-stablizer group 3212,
In,
Current/direct-current conversion device 3211, is electrically connected with external power supply, for being converted to the external input voltage of external power supply
Tertiary voltage；
Voltage-stablizer group 3212 is electrically connected with current/direct-current conversion device 3211, for tertiary voltage to be converted to corresponding first electricity
Pressure and second voltage.
Specifically, as shown in figure 4, voltage conversion circuit 321 passes through direct current transducer in voltage conversion circuit 321
Ac/dc voltage is converted to DC voltage by 3211, wherein external input voltage 24V passes through direct current transducer 3211DC/DC
Medium voltage V1 (that is, tertiary voltage provided by the present application) is converted to, V1 is using voltage-stablizer group 3212 (i.e. shown in Fig. 4
LDO1~LDO3) 5V, 3.3V and 1.2V are exported respectively.General voltage-stablizer group 3212 requires minimum voltage difference between input and output
For 0.5V, and V1 voltage value Ruo Taigao will cause the conversion circuit fever of the composition of voltage-stablizer group 3212, then will damage by pressure stabilizing
The conversion circuit that device group 3212 forms, so control chip 32 provided by the embodiments of the present application is multifunctional unit chip
TPS65381, the V1 voltage of the TPS65381 chip are 6V, have both been able to satisfy the conversion circuit of the composition of rear end voltage-stablizer group 3212
Demand, and many heats will not be generated at work.In turn, voltage-stablizer group 3212 turns V1 respectively after obtaining tertiary voltage V1
It is changed to first voltage and second voltage, as shown in figure 4, V1 is converted to 5V, 3.3V and 1.2V.
Further, voltage-stablizer group 3212 includes: multiple voltage-stablizers 32121, and voltage-stablizer is low pressure difference linear voltage regulator,
Wherein, the first voltage-stablizer is electrically connected with external equipment 36, for exporting the second voltage of corresponding external equipment 36；Second pressure stabilizing
Device and third voltage-stablizer, are electrically connected with single-chip microcontroller 34, for exporting the first voltage of corresponding single-chip microcontroller 34.
Specifically, as shown in figure 4, voltage-stablizer group 3212 provided by the embodiments of the present application is low pressure difference linear voltage regulator (Low
Dropout regulator, abbreviation LDO), after receiving tertiary voltage V1, which is converted into first voltage and the second electricity
Pressure, wherein in voltage-stablizer group 3212, the first voltage-stablizer is electrically connected with external equipment 36, the second voltage-stablizer and third voltage-stablizer and
Single-chip microcontroller 34 is electrically connected, from the foregoing, it will be observed that the VCC1 in Fig. 4 connects the second voltage-stablizer, VCC2 connects third voltage-stablizer, and the second voltage-stablizer is defeated
3.3V voltage out, third voltage-stablizer export 1.2V voltage.
Optionally, voltage monitoring circuit 322 are electrically connected with current/direct-current conversion device 3211 and voltage-stablizer group 3212 respectively, are used
Whether reach preset standard in detection tertiary voltage, first voltage and second voltage.
Specifically, as shown in figure 4, voltage monitoring circuit 322 respectively with the current/direct-current conversion device in voltage conversion circuit 321
3211 and voltage-stablizer group 3212 be electrically connected, for detect current/direct-current conversion device 3211 output tertiary voltage, voltage-stablizer group 3212
Whether the first voltage and second voltage of output meet preset standard.
Optionally, chip 32 is controlled further include: program monitors circuit 323, wherein
Program monitors circuit 323, is electrically connected with single-chip microcontroller 34, and the program for monitoring singlechip 34 is run.
In addition, as shown in figure 4, being controlled in the power protection system of single-chip microcontroller provided by the embodiments of the present application in chip 32 also
It include: program monitoring circuit 323, the program monitoring circuit 323 in the embodiment of the present application can be independent for band shown in Fig. 4 here
The window watchdog circuit of Shi Ji judges whether there is the signal for receiving the transmission of single-chip microcontroller 34 by preset timer, if
When timer expiry does not receive the signal of the transmission of single-chip microcontroller 34 also, program monitoring circuit 323 in the embodiment of the present application (that is,
In Fig. 4 with it is independent when base window watchdog circuit) will triggering reset single-chip microcontroller 34 reset signal.Wherein, chip is controlled
32 receive the configuration information and trigger signal that single-chip microcontroller 34 is sent, and do not send triggering letter at preset timed intervals when monitoring single-chip microcontroller 34
Number when, program monitor circuit 323 to single-chip microcontroller 34 send reset signal, reset the single-chip microcontroller 34.
Further, program monitoring circuit 323 includes: configuration module and functional module, wherein
Configuration module is electrically connected with single-chip microcontroller 34, for receiving the configuration information of the transmission of single-chip microcontroller 34；
Functional module is electrically connected with single-chip microcontroller 34, for receiving the trigger signal of single-chip microcontroller 34 and sending to single-chip microcontroller 34
Reset signal.
Specifically, the functional module in program monitoring circuit 323 is electrically connected with single-chip microcontroller 34, for receiving in preset time
The trigger signal that interior single-chip microcontroller 34 is sent, while in the case where not receiving trigger signal within a preset time, to single-chip microcontroller
34 send reset signal, so that single-chip microcontroller 34 resets.
Optionally, single-chip microcontroller 34 includes: first voltage input terminal 341, second voltage input terminal 342 and Serial Peripheral Interface (SPI)
343, wherein
First voltage input terminal 341 and second voltage input terminal 342, are electrically connected, for receiving with voltage conversion circuit 321
The first voltage that voltage conversion circuit 321 exports, wherein the voltage that first voltage input terminal 341 receives is greater than second voltage
The voltage that input terminal 342 receives；
Serial Peripheral Interface (SPI) 343 is electrically connected, for configuring respectively with voltage monitoring circuit 322 and program monitoring circuit 323
Voltage monitoring circuit 322 and program monitor circuit 323.
Specifically, as shown in figure 4, including first voltage input terminal 341 (VCC1 shown in Fig. 4), second in single-chip microcontroller 34
Voltage input end 342 (VCC2 shown in Fig. 4) and Serial Peripheral Interface (SPI) 343 (SPI shown in Fig. 4), first voltage inputs here
End 341 and second voltage input terminal 342 are electrically connected with the voltage conversion circuit 321 in control chip 32, are turned for receiving voltage
Change the first voltage of the output of circuit 321, wherein first voltage input terminal 341 is the port data input and output I/O, second voltage
Input terminal 342 is core power voltage input end, as shown in figure 4, the voltage of first voltage input terminal 341 is 3.3V, the second electricity
Pressure input terminal 342 is 1.2V.
Serial Peripheral Interface (SPI) (Serial Peripheral Interface, abbreviation SPI) 343 respectively with control chip 32
In voltage monitoring circuit 322 and program monitoring circuit 323 be electrically connected, single-chip microcontroller 34 by Serial Peripheral Interface (SPI) 343 configuration control
Voltage monitoring circuit 322 and program in coremaking piece 32 monitor circuit 323, and discharge the Serial Peripheral Interface (SPI) after configuration is complete
343。
Optionally, single-chip microcontroller 34 further include: reseting interface 344 and signal output interface 345, wherein
Reseting interface 344 is electrically connected, for receiving voltage respectively with voltage monitoring circuit 322 and program monitoring circuit 323
Monitor the reset signal that circuit 322 or program monitoring circuit 323 are sent；
Signal output interface 345 is electrically connected, the trigger signal for transmission with program monitoring circuit 323.
Specifically, as shown in figure 4, the reseting interface 344 in single-chip microcontroller 34 is shown in Fig. 4 in the embodiment of the present application
The port RST, signal output interface 345 are the port WDI shown in Fig. 4.Wherein, reseting interface 344 respectively with control chip 32
In voltage monitoring circuit 322 and program monitoring circuit 323 be electrically connected, for voltage monitoring circuit 322 detect first electricity
Pressure and second voltage over-voltage or it is under-voltage in the case where the reset signal that exports, or, program monitoring circuit 323 is within a preset time not
Trigger signal is received, reset signal is sent, corresponds to 34 side of single-chip microcontroller here, signal output interface 345 is within a preset time
The port of trigger signal is sent to control chip.
To sum up, the power protection system of single-chip microcontroller provided by the embodiments of the present application is when in use, specific as follows:
Firstly, the voltage conversion circuit 321 for TPS65381 (that is, control chip 32 provided by the embodiments of the present application) provides
The 24V power supply of redundancy.
Second, independent 24V power supply is provided to control the VSAF of chip 32.
Third after single-chip microcontroller 34 completes initialization, reads the register in TPS65381 chip, confirmation electricity by SPI
Whether pressure monitoring function can be used, and voltage monitoring function is enabled if unavailable.That is, the serial peripheral of corresponding above-mentioned single-chip microcontroller 34
Interface 343 is electrically connected with the voltage monitoring circuit 322 of control chip 32.
4th, single-chip microcontroller configures the house dog in TPS65381 chip by SPI, and in the process of running, single-chip microcontroller 34 is logical
WDI is crossed in designated time internal trigger house dog.That is, corresponding above-mentioned Serial Peripheral Interface (SPI) 343 and signal output interface 345.
5th, single-chip microcontroller is completed to discharge SPI mouthfuls after TPS65381 chip initiation by SPI.That is, release is above-mentioned serial
Peripheral Interface 343.
From the foregoing, it will be observed that single-chip microcontroller provided by the embodiments of the present application power protection system provide use collecting voltage conversion,
Voltage monitoring and it is independent when base window watchdog function solve in the TPS65381 chip of one in the relevant technologies voltage monitorings electricity
Road and watchdog circuit needs are individually designed, and it is high to lead to design cost, and the technology that the area for occupying printing board PCB is big
Problem.
In addition, compared with prior art, the power protection system of single-chip microcontroller provided by the embodiments of the present application has following excellent
Point: (1) part category is single, facilitates supplier management；(2) individually designed voltage monitoring circuit and watchdog circuit are not needed；
(3) it is small to occupy pcb board area.
Embodiment 2
According to embodiments of the present invention, the embodiment of the method for a kind of power protection method of single-chip microcontroller is provided, Fig. 5 is basis
The flow diagram of the power protection method of the single-chip microcontroller of the embodiment of the present invention, as shown in figure 5, this method comprises:
The external input voltage received is converted to the first voltage of corresponding single-chip microcontroller and corresponds to external set by step S502
Standby second voltage；
Step S504, detects first voltage and whether second voltage matches with preset standard, and preset standard is defeated for detecting
Enter voltage whether be single-chip microcontroller and external equipment operating voltage；
Step S506 is sent multiple when detecting that first voltage and second voltage and preset standard are mismatched to single-chip microcontroller
Position signal, reset signal are resetted for control single chip computer.
In conjunction with step S502 to step S506, Fig. 3 in corresponding embodiment 1, step S502 to step S506 are implementing this
When applying for the power protection method for the single-chip microcontroller that embodiment provides, by receiving external input voltage, by the external input voltage
Be converted to the first voltage of 3 single-chip microcontroller 34 of corresponding diagram and the second voltage of external equipment 36；And then control chip 32 detects in Fig. 3
Whether the first voltage and second voltage reach preset standard, if not up to preset standard, send to single-chip microcontroller 34 and reset letter
Number, to ensure the safe operation of single-chip microcontroller 34.
In the power protection method of single-chip microcontroller provided by the embodiments of the present application, by the way that the external input voltage received is turned
It is changed to the first voltage of corresponding single-chip microcontroller and the second voltage of corresponding external equipment；Detect first voltage and second voltage whether with
Preset standard matching, preset standard be used for detect input voltage whether be single-chip microcontroller and external equipment operating voltage；Work as detection
When mismatching to first voltage and second voltage and preset standard, reset signal is sent to single-chip microcontroller, reset signal is for controlling
Monolithic processor resetting, has achieved the purpose that reduce design cost, saves pcb board design area to realize, and saves production design
The technical effect of cost, and then solve since the relevant technologies voltage monitoring circuit and watchdog circuit needs are individually designed, it leads
It is high to cause design cost, and the technical problem that the area for occupying printing board PCB is big.
Optionally, the case where chip includes: voltage conversion circuit, voltage monitoring circuit and program monitoring circuit is being controlled
Under, sending reset signal to single-chip microcontroller in step S506 includes:
Whether Step1 reaches in the first voltage and second voltage of voltage monitoring circuit detection voltage conversion circuit conversion
Preset standard；
Step2 determines the when voltage monitoring circuit detects that first voltage and/or second voltage are less than preset standard
One voltage and/or second voltage are under-voltage condition, send the first reset signal to single-chip microcontroller, wherein the first reset signal is used for
The voltage status of instructed voltage is under-voltage condition；
Step3 determines the when voltage monitoring circuit detects that first voltage and/or second voltage are greater than preset standard
One voltage and/or second voltage are overvoltage condition, send the second reset signal to single-chip microcontroller, wherein the second reset signal is used for
The voltage status of instructed voltage is overvoltage condition.
In conjunction with Step1 to Step3, Fig. 4 in corresponding embodiment 1, if the voltage monitoring circuit 322 in control chip 32 is examined
Measure first voltage and/or when voltage is not up to preset standard (that is, over-voltage and under-voltage state), send the first reset signal or
Second reset signal.
Optionally, the power protection method of single-chip microcontroller provided by the embodiments of the present application further include:
Whether overtime step S508 detects preset reset timer；
Step S510 receives the trigger signal that single-chip microcontroller is sent in the case where testing result is no；
Step S512 sends reset signal to single-chip microcontroller in the case where testing result, which is, is.
In conjunction with step S508 to step S512, Fig. 4 in corresponding embodiment 1 is controlled and is deposited between chip 32 and single-chip microcontroller 34
In preset timer, that is, control chip 32 in program monitoring circuit 323 (that is, with it is independent when base window house dog) in inspection
Survey whether preset reset timer is overtime, if not receiving the trigger signal of the transmission of single-chip microcontroller 34 within a preset time, controls
Program in coremaking piece 32 monitors circuit 323 and sends reset signal to single-chip microcontroller 34；If receiving single-chip microcontroller within a preset time
34 trigger signals sent, then receive the trigger signal.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
In the above embodiment of the invention, it all emphasizes particularly on different fields to the description of each embodiment, does not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
On unit.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the present invention whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-OnlyMemory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of power protection system of single-chip microcontroller, which is characterized in that applied to single-chip minimum system supply voltage and
Program operation is monitored, comprising: control chip, single-chip microcontroller and external equipment, wherein
The control chip, is electrically connected with the single-chip microcontroller and the external equipment respectively, for converting external input voltage
For the first voltage of the correspondence single-chip microcontroller and the second voltage of the corresponding external equipment；
The single-chip microcontroller is electrically connected with the control chip, for receive it is described control chip transformation after the first voltage；
The external equipment is electrically connected with the control chip, for receive it is described control chip transformation after it is described second electricity
Pressure；
Wherein, the control chip includes: that voltage conversion circuit, voltage monitoring circuit and program monitoring circuit, the voltage turn
Circuit is changed, is electrically connected respectively with the power end of the single-chip microcontroller and the external equipment, for being converted to external input voltage
The second voltage of the first voltage of the corresponding single-chip microcontroller and the corresponding external equipment；The voltage monitoring circuit, with
The voltage conversion circuit electrical connection, for detecting the first voltage and second electricity that the voltage conversion circuit exports
Whether pressure reaches preset standard, and whether the preset standard is the single-chip microcontroller and described external for detecting the input voltage
The operating voltage of equipment；Described program monitors circuit, and with the monolithic mechatronics, the program for monitoring the single-chip microcontroller is transported
Row；
The control chip includes: TPS65381 chip.
2. the power protection system of single-chip microcontroller according to claim 1, which is characterized in that the voltage conversion circuit packet
It includes: current/direct-current conversion device and voltage-stablizer group, wherein
The current/direct-current conversion device, is electrically connected with external power supply, for being converted to the external input voltage of the external power supply
Tertiary voltage；
The voltage-stablizer group, is electrically connected with the current/direct-current conversion device, for the tertiary voltage to be converted to corresponding described the
One voltage and the second voltage.
3. the power protection system of single-chip microcontroller according to claim 2, which is characterized in that the voltage-stablizer group includes: more
A voltage-stablizer, and the voltage-stablizer is low pressure difference linear voltage regulator, wherein the first voltage-stablizer is electrically connected with the external equipment,
For exporting the second voltage of the corresponding external equipment；Second voltage-stablizer and third voltage-stablizer, it is electromechanical with the monolithic
Connection, for exporting the first voltage of the corresponding single-chip microcontroller.
4. the power protection system of single-chip microcontroller according to claim 2, which is characterized in that the voltage monitoring circuit, point
Be not electrically connected with the current/direct-current conversion device and the voltage-stablizer group, for detect the tertiary voltage, the first voltage and
Whether the second voltage reaches the preset standard.
5. the power protection system of single-chip microcontroller according to claim 1, which is characterized in that described program monitors circuit packet
It includes: configuration module and functional module, wherein
The configuration module, with the monolithic mechatronics, the configuration information sent for receiving the single-chip microcontroller；
The functional module, and monolithic mechatronics, for receiving the trigger signal of the single-chip microcontroller and to the monolithic
Machine sends reset signal.
6. the power protection system of single-chip microcontroller according to claim 1, which is characterized in that the single-chip microcontroller includes: first
Voltage input end, second voltage input terminal and Serial Peripheral Interface (SPI), wherein
The first voltage input terminal and the second voltage input terminal, are electrically connected, for receiving with the voltage conversion circuit
The first voltage of the voltage conversion circuit output, wherein the voltage that the first voltage input terminal receives is greater than institute
State the voltage that second voltage input terminal receives；
The Serial Peripheral Interface (SPI) is electrically connected, for configuring respectively with the voltage monitoring circuit and described program monitoring circuit
The voltage monitoring circuit and described program monitor circuit.
7. the power protection system of single-chip microcontroller according to claim 1, which is characterized in that the single-chip microcontroller further include: multiple
Position interface and signal output interface, wherein
The reseting interface is electrically connected with the voltage monitoring circuit and described program monitoring circuit respectively, described for receiving
The reset signal that voltage monitoring circuit or described program monitoring circuit are sent；
The signal output interface is electrically connected, the trigger signal for transmission with described program monitoring circuit.
8. a kind of power protection method of single-chip microcontroller, which is characterized in that applied to list described in any one of claims 1 to 7
The power protection system of piece machine, comprising:
The external input voltage received is converted into the first voltage of the corresponding single-chip microcontroller and corresponds to the external equipment
Second voltage；
It detects the first voltage and whether the second voltage matches with preset standard, the preset standard is described for detecting
Input voltage whether be the single-chip microcontroller and the external equipment operating voltage；
When detecting that the first voltage and the second voltage and the preset standard mismatch, Xiang Suoshu single-chip microcontroller is sent
Reset signal, the reset signal is for controlling the monolithic processor resetting.
9. according to the method described in claim 8, it is characterized in that, including: voltage conversion circuit, voltage in the control chip
It is described to include: to single-chip microcontroller transmission reset signal in the case where monitoring circuit and program monitoring circuit
The first voltage of the voltage conversion circuit conversion is detected in the voltage monitoring circuit and the second voltage is
It is no to reach the preset standard；
When the voltage monitoring circuit detects the first voltage and/or the second voltage is less than the preset standard,
Determining the first voltage and/or the second voltage is under-voltage condition, Xiang Suoshu single-chip microcontroller sends the first reset signal,
In, the voltage status that first reset signal is used to indicate the voltage is the under-voltage condition；
When the voltage monitoring circuit detects the first voltage and/or the second voltage is greater than the preset standard,
Determining the first voltage and/or the second voltage is overvoltage condition, Xiang Suoshu single-chip microcontroller sends the second reset signal,
In, the voltage status that second reset signal is used to indicate the voltage is the overvoltage condition.
10. according to the method described in claim 8, it is characterized in that, the method also includes:
Whether overtime detect preset reset timer；
In the case where testing result is no, the trigger signal that the single-chip microcontroller is sent is received；
In the case where testing result, which is, is, Xiang Suoshu single-chip microcontroller sends reset signal.
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