CN207676169U - A kind of house dog MCU monitoring circuit - Google Patents
A kind of house dog MCU monitoring circuit Download PDFInfo
- Publication number
- CN207676169U CN207676169U CN201721885691.3U CN201721885691U CN207676169U CN 207676169 U CN207676169 U CN 207676169U CN 201721885691 U CN201721885691 U CN 201721885691U CN 207676169 U CN207676169 U CN 207676169U
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- resistance
- mcu
- triode
- electrically connected
- mcu microcontrollers
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- 238000012544 monitoring process Methods 0.000 title claims description 18
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000000739 chaotic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Elimination Of Static Electricity (AREA)
- Debugging And Monitoring (AREA)
Abstract
The utility model discloses a kind of house dog MCU to monitor circuit,Including MCU microcontrollers,The MCU microcontrollers are electrically connected with regulator circuit,The regulator circuit includes resistance R12,Zener diode D,Triode Q,Resistance R13 and resistance R14,A termination power V1 of the resistance R12,The other end is electrically connected with zener diode D and resistance R13,The other end of the zener diode D is electrically connected with the base stage of triode Q,The emitter of the triode Q and the power pins of the MCU microcontrollers are electrically connected,The resistance R14 is in parallel with resistance R13 and triode Q,The base stage of the triode Q meets power supply V2,When needing to debug MCU microcontrollers,Power supply V2 exports low level and powers to MCU microcontrollers,After the completion of debugging operations,Power supply V2 exports high level,Close power supply,In the switching of continuous low and high level,Ensure MCU microcontroller powered stables.
Description
Technical field
The utility model is related to electronic technology fields, more specifically, it relates to which a kind of house dog MCU monitors circuit.
Background technology
In the microcomputer system be made of microcontroller, since the work of microcontroller usually can be by from external electromagnetic
The interference of field, causes the data corruption of various registers and memory, can lead to program pointer mistake, not in program area, takes out wrong
Program instruction accidentally etc., can all be absorbed in endless loop, the normal operation of program is interrupted, and can not be continued by monolithic processor controlled system
Normal work, can cause whole system to be absorbed in dead state, unpredictable consequence occurs, it is read-only to may result in electric erasable
Memory data is chaotic, and electricallyerasable ROM (EEROM) erasing and writing life exhausts, and data can not be written in partial address, so for right
The considerations of single-chip microcomputer running status is monitored in real time just produces a kind of dedicated for monitoring SCM program operating status
Chip is commonly called as house dog.
Currently, the Chinese patent of Publication No. CN104020705A discloses a kind of Power Supply Monitoring electricity with reset function
Road, including SW172X chips and reset circuit；The PFI pins connection Schottky protection diode VD's of the SW172X chips is defeated
Enter end；The RST reset terminals of the SW172X chips connect the RST reset terminals of reset circuit；Reset circuit includes main power source electricity
Road and auxiliary power circuit；The base stage connection power vd D of the triode Q1；The anode connection resistance R13 of the diode D1；Three
The RST reset terminals of the collector connection SW172X chips of pole pipe Q1.
But the monitoring signal of the monitoring circuit is single, monitoring reliability is low, will produce in burning program or debugging dry
It disturbs.
Utility model content
In view of the above shortcomings of the prior art, the purpose of this utility model is to provide a kind of house dog MCU monitoring electricity, has
The high advantage of reliability.
The above-mentioned technical purpose of the utility model technical scheme is that：A kind of house dog MCU prisons
Control circuit, including MCU microcontrollers, the MCU microcontrollers are electrically connected with regulator circuit, the regulator circuit include resistance R12,
A termination power V1 of zener diode D, triode Q, resistance R13 and resistance R14, the resistance R12, the other end and voltage stabilizing
Diode D and resistance R13 are electrically connected, and the other end of the zener diode D is electrically connected with the base stage of triode Q, described
The emitter of triode Q and the power pins of the MCU microcontrollers are electrically connected, the resistance R14 and resistance R13 and triode
Q is in parallel, and the base stage of the triode Q meets power supply V2.
By using above-mentioned technical proposal, MCU microcontrollers make MCU microcontrollers at work through regulator circuit, and voltage is steady
It is fixed, reduce the interference in burning program or debugging to MCU microcontrollers；When needing to debug MCU microcontrollers, power supply V2
Low level is exported to power to MCU microcontrollers, after the completion of debugging operations, power supply V2 exports high level, closes the power supply of MCU microcontrollers,
In the switching of continuous high-frequency low and high level, ensure MCU microcontroller powered stables.
Preferably, the resistance R14 is adjustable resistance.
By using above-mentioned technical proposal, adjustable resistance can adjust the voltage value of regulator circuit, it is made to be adapted to different electricity
The MCU microcontrollers of pressure request.
Preferably, it is electrically connected between the node of the emitter of the power pins of the MCU microcontrollers and the triode Q
There is charge and discharge branch.
Preferably, the charge and discharge branch includes capacitance C, and one end of the capacitance C is electrically connected at the transmitting of triode Q
Pole, the other end ground connection of the capacitance C.
By using above-mentioned technical proposal, if monitoring circuit powers off suddenly, charge and discharge branch, which can discharge, to be continued
Stream, is further ensured that the monitoring signal of MCU microcontrollers.
Preferably, the MCU microcontrollers are electrically connected with detection module, and the input terminal of the detection module is electrically connected at
The P2.1 pins of MCU microcontrollers, the detection module are used to detect the duration of low level or high level.
By using above-mentioned technical proposal, several detections of P2.1 pin time switches of MCU microcontrollers, when P2.1 pins detect
To when constantly having 10 seconds high and 10 seconds low level changes, the monitoring circuit is working properly；When P2.1 pins detect that level exists
There are no when any variation after often high or normal low state continues two minutes, monitoring circuit work is abnormal；In open state
Under, P2.5 pins are sent out and are dragged down 1.5 seconds, ensure that equipment in case of emergency being capable of normal use.
Preferably, the MCU microcontrollers are electrically connected with LED module, and the LED module is used to control the bright of monitoring circuit
Degree.
By using above-mentioned technical proposal, when MCU microcontrollers are in different states, LED module shows different bright
Degree, reaches the effect of instruction.
In conclusion the utility model has the advantages that：MCU microcontrollers make MCU microcontrollers through regulator circuit
At work, voltage stabilization reduces the interference in burning program or debugging to MCU microcontrollers；When need to MCU microcontrollers into
When row debugging, power supply V2 exports low level and powers to MCU microcontrollers, and after the completion of debugging operations, power supply V2 exports high level, closes
MCU microcontrollers are powered, and in the switching of continuous high-frequency low and high level, ensure MCU microcontroller powered stables.
Description of the drawings
Fig. 1 is the circuit diagram that house dog MCU monitors circuit in the utility model embodiment.
In figure：1, MCU microcontrollers；2, regulator circuit；3, charge-discharge circuit；4, detection module；5, LED module.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing.
A kind of house dog MCU monitoring electricity, as shown in Figure 1, including MCU microcontrollers 1, MCU microcontrollers 1 are electrically connected with voltage stabilizing
Circuit 2, regulator circuit 2 include resistance R12, zener diode D, triode Q, resistance R13 and resistance R14, the one of resistance R12
Termination power V1, the other end are electrically connected with zener diode D and resistance R13, the other end and the triode Q of zener diode D
Base stage be electrically connected, the emitter of triode Q and the power pins of MCU microcontrollers 1 are electrically connected, resistance R14 and resistance R13
In parallel with triode Q, the base stage of triode Q meets power supply V2, and resistance R15 is in series between the base stage of triode Q and power supply V2,
Wherein, resistance R14 is adjustable resistance, and adjustable resistance can adjust the voltage value of regulator circuit 2, it is made to be adapted to different voltages requirement
MCU microcontrollers 1.
MCU microcontrollers 1 through regulator circuit 2 so that MCU microcontrollers 1 at work, voltage stabilization, reduce in burning program or
To the interference of MCU microcontrollers 1 when debugging；When needing to debug MCU microcontrollers 1, it is mono- to MCU that power supply V2 exports low level
Piece machine 1 is powered, and after the completion of debugging operations, power supply V2 exports high level, is closed MCU microcontrollers 1 and is powered, in continuous high-frequency height
When low level switching, ensure 1 powered stable of MCU microcontrollers.
It is electrically connected with charge and discharge branch between the power pins of MCU microcontrollers 1 and the node of the emitter of triode Q,
Charge and discharge branch includes capacitance C, and one end of capacitance C is electrically connected at the emitter of triode Q, and the other end of capacitance C is grounded, such as
When fruit monitoring circuit powers off suddenly, charge and discharge branch, which can discharge, carries out afterflow, is further ensured that the monitoring letter of MCU microcontrollers 1
Number.
MCU microcontrollers 1 are electrically connected with detection module 4, and the input terminal of detection module 4 is electrically connected at MCU microcontrollers 1
P2.1 pins, detection module 4 are used to detect the duration of low level or high level, the P2.1 pin timings of MCU microcontrollers 1
Several detections are switched, when P2.1 pins, which detect constantly, there are 10 seconds high and 10 seconds low level changes, which works just
Often；When P2.1 pins detect level after Chang Gao or normal low state continue two minutes there are no when any variation, the monitoring
Circuit work is abnormal；Under open state, P2.5 pins are sent out and are dragged down 1.5 seconds, ensures that equipment in case of emergency can
Normal use；The input terminal of detection module 4 is electrically connected with resistance R1, and the other end of resistance R1 is electrically connected with power supply V4.
MCU microcontrollers 1 are electrically connected with LED module 5, and the input terminal of LED module 5 is electrically connected at MCU microcontrollers 1
P2.2 pins, and resistance R4 is in series between LED module 5 and the P2.2 pins of MCU microcontrollers 1, LED module 5 is supervised for controlling
The brightness of circuit is controlled, when MCU microcontrollers 1 are in different states, LED module 5 shows different brightness, reaches the work of instruction
With；Wherein, the P2.2 pins of MCU microcontrollers 1 are electrically connected with resistance R2 with the node of resistance R4, and the other end of resistance R2 is electrical
It is connected with power supply V5.
Above-described embodiment is only the explanation to the utility model, is not limitations of the present invention, this field
Technical staff can as needed make the present embodiment the modification of not creative contribution after reading this specification, but only
It all to be protected by Patent Law in the right of the utility model.
Claims (6)
1. a kind of house dog MCU monitors circuit, including MCU microcontrollers (1), it is characterized in that：The MCU microcontrollers (1) electrically connect
It is connected to regulator circuit (2), the regulator circuit (2) includes resistance R12, zener diode D, triode Q, resistance R13 and electricity
R14, a termination power V1 of the resistance R12 are hindered, the other end is electrically connected with zener diode D and resistance R13, the voltage stabilizing
The other end of diode D is electrically connected with the base stage of triode Q, the emitter of the triode Q and the MCU microcontrollers (1)
Power pins be electrically connected, the resistance R14 is in parallel with resistance R13 and triode Q, and the base stage of the triode Q connects power supply
V2。
2. a kind of house dog MCU according to claim 1 monitors circuit, it is characterized in that：The resistance R14 is adjustable electric
Resistance.
3. a kind of house dog MCU according to claim 1 monitors circuit, it is characterized in that：The electricity of the MCU microcontrollers (1)
It is electrically connected with charge and discharge branch between the node of the emitter of source pin and the triode Q.
4. a kind of house dog MCU according to claim 3 monitors circuit, it is characterized in that：The charge and discharge branch includes electricity
Hold C, one end of the capacitance C is electrically connected at the emitter of triode Q, the other end ground connection of the capacitance C.
5. a kind of house dog MCU according to claim 1 monitors circuit, it is characterized in that：The MCU microcontrollers (1) are electrical
It is connected with detection module (4), the input terminal of the detection module (4) is electrically connected at the P2.1 pins of MCU microcontrollers (1), institute
State duration of the detection module (4) for detecting low level or high level.
6. a kind of house dog MCU according to claim 1 monitors circuit, it is characterized in that：The MCU microcontrollers (1) are electrical
It is connected with LED module (5), the LED module (5) is used to control the brightness of monitoring circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721885691.3U CN207676169U (en) | 2017-12-28 | 2017-12-28 | A kind of house dog MCU monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721885691.3U CN207676169U (en) | 2017-12-28 | 2017-12-28 | A kind of house dog MCU monitoring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207676169U true CN207676169U (en) | 2018-07-31 |
Family
ID=62971508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721885691.3U Expired - Fee Related CN207676169U (en) | 2017-12-28 | 2017-12-28 | A kind of house dog MCU monitoring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207676169U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736502A (en) * | 2020-06-15 | 2020-10-02 | 杭州高锦科技有限公司 | Circuit with no mutual interference between external watchdog and program burning |
-
2017
- 2017-12-28 CN CN201721885691.3U patent/CN207676169U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736502A (en) * | 2020-06-15 | 2020-10-02 | 杭州高锦科技有限公司 | Circuit with no mutual interference between external watchdog and program burning |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180731 |