CN209460752U - A kind of circuit of anti-program fleet - Google Patents
A kind of circuit of anti-program fleet Download PDFInfo
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- CN209460752U CN209460752U CN201920246661.0U CN201920246661U CN209460752U CN 209460752 U CN209460752 U CN 209460752U CN 201920246661 U CN201920246661 U CN 201920246661U CN 209460752 U CN209460752 U CN 209460752U
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Abstract
The utility model relates to a kind of circuits of anti-program fleet, including watchdog chip and the first field-effect tube and the second field-effect tube, the timing of watchdog chip is controlled by I2C two lines bus in conjunction with external control circuit, realize that microprocessor is restarted in timing, it realizes and is restarted automatically in system in case of system halt, without manually restarting；The transmittability of watchdog chip and external control circuit is improved using the first field-effect tube and the second field-effect tube, circuit is simple, and it is at low cost, it is small in size, it is easy to use.
Description
Technical field
The utility model relates to field of circuit technology, more specifically to a kind of circuit of anti-program fleet.
Background technique
As people's lives level is continuously improved, people are also increasing to the use demand of electronic product, existing
Programmable control chip is equipped with house dog mostly, prevents program fleet and influences the normal operation of circuit, existing house dog master
Will there are two types of: the first is the house dog of built-in chip type, and when use needs to initialize, if program is in initialization, start completion
Preceding run flies or runs after disabling to fly, and house dog can not just reset system, and the effect of such house dog is just without system restores energy
Power reduces；For second independent watchdog chip, when use can not flexible configuration overflow the time, can not disable, flexibility drop
It is low.
Utility model content
The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a kind of circuit letter
It is single, at low cost, small in size, the circuit of anti-program fleet easy to use.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
Construct a kind of circuit of anti-program fleet, including watchdog chip and the first field-effect tube and the second field-effect
Pipe；Wherein, the end SDATA of the watchdog chip is connect with the drain electrode of first field-effect tube, first field-effect tube
Grid and the anode of power supply connect, the source electrode of first field-effect tube is connected with first resistor, the first resistor it is another
The connection of the data signal end of one end and external control circuit；The end SCLK of the watchdog chip and second field-effect tube
Drain electrode connection, the grid of second field-effect tube are connect with the anode of the power supply, and the source electrode of second field-effect tube connects
It is connected to second resistance, the other end of the second resistance is connect with the clock signal terminal of the external control circuit；It is described to guard the gate
Dog chip is also connected with microprocessor, the end WDTOUT10# of the WatchDog Timer and the reset terminal of the microprocessor
(RESET) it connects.
The circuit of anti-program fleet described in the utility model, wherein the drain electrode of first field-effect tube is also connected with
3rd resistor, the drain electrode of second field-effect tube are connected with the 4th resistance, the 3rd resistor and the 4th resistance it is another
One end is connect with the end VSB3V of the watchdog chip.
The circuit of anti-program fleet described in the utility model, wherein the source electrode of first field-effect tube is also connected with
5th resistance, the source electrode of second field-effect tube are also connected with the 6th resistance, the 5th resistance and the 6th resistance
The other end is connect with the anode of the power supply.
The utility model has the beneficial effects that: controlling watchdog chip by I2C two lines bus in conjunction with external control circuit
Timing, realize timing microprocessor is restarted, realize and be restarted automatically in system in case of system halt, without manually weighing
It opens；The transmittability of watchdog chip and external control circuit is improved using the first field-effect tube and the second field-effect tube,
Circuit is simple, at low cost, small in size, easy to use.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below in conjunction with attached drawing and reality
Applying example, the utility model is described in further detail, and the accompanying drawings in the following description is only section Example of the invention, for this
For the those of ordinary skill of field, without creative efforts, it is attached to can also be obtained according to these attached drawings other
Figure:
Fig. 1 is the circuit diagram of the watchdog chip of the circuit of the anti-program fleet of the utility model preferred embodiment；
Fig. 2 is the first field-effect tube and the second field-effect of the circuit of the anti-program fleet of the utility model preferred embodiment
The circuit diagram of pipe.
Specific embodiment
It is practical below in conjunction with this in order to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Technical solution in new embodiment carries out clear, complete description, it is clear that described embodiment is the portion of the utility model
Point embodiment, rather than whole embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not paying creation
Property labour under the premise of every other embodiment obtained, belong to the protection scope of the utility model.
The circuit of the anti-program fleet of the utility model preferred embodiment is as shown in Figure 1, simultaneously referring to Fig.2, including guarding the gate
The end SDATA of dog chip U10 and the first field-effect tube Q4 and the second field-effect tube Q3, watchdog chip U10 and first effect
Should pipe Q4 drain electrode connection, the anode of the grid of the first field-effect tube Q4 and power supply connects, and the source electrode of the first field-effect tube Q4 connects
It is connected to first resistor R108, the other end of first resistor R108 and the data signal end of external control circuit (not shown) connect
It connects；The end SCLK of watchdog chip U10 is connect with the drain electrode of the second field-effect tube Q3, the grid and power supply of the second field-effect tube Q3
Anode connection, the source electrode of the second field-effect tube Q3 is connected with second resistance R102, the other end of second resistance R102 and external
The clock signal terminal of control circuit connects；Watchdog chip U10 is also connected with microprocessor (not shown), house dog timing
The end WDTOUT10# of device and the reset terminal (RESET) of microprocessor connect；Pass through the control of I2C two lines bus in conjunction with external control circuit
The timing of watchdog chip U10 processed, realizes that microprocessor is restarted in timing, and automatic weight is realized in system in case of system halt
It opens, without manually restarting；Using the first field-effect tube Q4 and the second field-effect tube Q3 with improve watchdog chip U10 with
The transmittability of external control circuit, circuit is simple, at low cost, small in size, easy to use.
As depicted in figs. 1 and 2, the drain electrode of the first field-effect tube Q4 is also connected with 3rd resistor R121, the second field-effect tube
The drain electrode of Q3 is connected with the other end of the 4th resistance R109,3rd resistor R121 and the 4th resistance R109 and watchdog chip
The end VSB3V of U10 connects；Circuit is simple, small in size, at low cost.
As shown in Fig. 2, the source electrode of the first field-effect tube Q4 is also connected with the 5th resistance R107, the source of the second field-effect tube Q3
The other end that pole is also connected with the 6th resistance R104, the 5th resistance R107 and the 6th resistance R104 is connect with the anode of power supply；
Circuit is simple, small in size, at low cost.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.
Claims (3)
1. a kind of circuit of anti-program fleet, including watchdog chip and the first field-effect tube and the second field-effect tube；It is special
Sign is that the end SDATA of the watchdog chip is connect with the drain electrode of first field-effect tube, first field-effect tube
The anode of grid and power supply connects, and the source electrode of first field-effect tube is connected with first resistor, the first resistor it is another
End is connect with the data signal end of external control circuit；The leakage at the end SCLK of the watchdog chip and second field-effect tube
Pole connection, the grid of second field-effect tube are connect with the anode of the power supply, the source electrode connection of second field-effect tube
There is second resistance, the other end of the second resistance is connect with the clock signal terminal of the external control circuit；The house dog
Chip is also connected with microprocessor, the end WDTOUT10# of the WatchDog Timer and the reset terminal RESET of the microprocessor
Connection.
2. the circuit of anti-program fleet according to claim 1, which is characterized in that the drain electrode of first field-effect tube is also
It is connected with 3rd resistor, the drain electrode of second field-effect tube is connected with the 4th resistance, the 3rd resistor and the 4th electricity
The other end of resistance is connect with the end VSB3V of the watchdog chip.
3. the circuit of anti-program fleet according to claim 2, which is characterized in that the source electrode of first field-effect tube is also
It is connected with the 5th resistance, the source electrode of second field-effect tube is also connected with the 6th resistance, the 5th resistance and the described 6th
The other end of resistance is connect with the anode of the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920246661.0U CN209460752U (en) | 2019-02-27 | 2019-02-27 | A kind of circuit of anti-program fleet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920246661.0U CN209460752U (en) | 2019-02-27 | 2019-02-27 | A kind of circuit of anti-program fleet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209460752U true CN209460752U (en) | 2019-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920246661.0U Active CN209460752U (en) | 2019-02-27 | 2019-02-27 | A kind of circuit of anti-program fleet |
Country Status (1)
| Country | Link |
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| CN (1) | CN209460752U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113467283A (en) * | 2020-03-31 | 2021-10-01 | 深圳市优必选科技股份有限公司 | Power control circuit and robot |
-
2019
- 2019-02-27 CN CN201920246661.0U patent/CN209460752U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113467283A (en) * | 2020-03-31 | 2021-10-01 | 深圳市优必选科技股份有限公司 | Power control circuit and robot |
| CN113467283B (en) * | 2020-03-31 | 2023-01-06 | 深圳市优必选科技股份有限公司 | Power control circuit and robot |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong city of Shenzhen province Futian District Che Kung Temple Tairan nine road Haisong building B-1303 Patentee after: Shenzhen smart Micro Intelligent Technology Co., Ltd Address before: 518000 Guangdong city of Shenzhen province Futian District Che Kung Temple Tairan nine road Haisong building B-1303 Patentee before: JWIPC TECHNOLOGY DEVELOPMENT Ltd. |
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| CP01 | Change in the name or title of a patent holder |