CN213690290U - Novel MCU reset circuit device - Google Patents
Novel MCU reset circuit device Download PDFInfo
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- CN213690290U CN213690290U CN202023209300.0U CN202023209300U CN213690290U CN 213690290 U CN213690290 U CN 213690290U CN 202023209300 U CN202023209300 U CN 202023209300U CN 213690290 U CN213690290 U CN 213690290U
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Abstract
A novel MCU reset circuit device comprises resistors R1-R10, capacitors C1-C2, a diode D1, triodes Q1 and Q3, an MOS tube Q2, a comparator U1 and an external switch button J1; the input end of the Reset circuit device is 3.3V voltage and outputs a Reset signal; the input end is connected with a triode Q1 and a MOS tube Q2, the triode Q1 is grounded through an external switch button J1, the triode Q1 and the MOS tube Q2 are connected with a comparator U1 through a resistor and a capacitor, the comparator U1 is connected with a diode D1 and a triode Q3, and the triode Q3 outputs a level signal serving as a Reset signal. The reset circuit device can realize two functions of reset and restoration only by one button. The operation is simple, the operation can be completely assisted by a client, and after-sales personnel are not required to go to the door to perform local program burning and updating. The duration of the recovery signal is detected during the recovery operation, so that the reset operation and the recovery operation are obviously distinguished, and the method is friendly to clients.
Description
Technical Field
The utility model belongs to the technical field of embedded control and specifically relates to a novel MCU reset circuit device, the embedded control field of new forms of energy.
Background
The power scheduling of the photovoltaic energy storage system is not open to EMS (energy management system). And the MCU is a core control device of the EMS. Under a complex operating environment, the MCU is difficult to avoid the situations of program runaway, abnormal power failure, program deadlocking and the like. With the mass shipment of the light storage system, the distribution range of the system is wider and wider. Many of which are remote in location. When remote upgrade fails due to a program problem, after-sale door maintenance work becomes very difficult, consuming a lot of time and labor. Therefore, when the MCU is trapped in a dead cycle and cannot be automatically reset, external manual reset or factory software program restoration is particularly important.
Disclosure of Invention
The utility model discloses to the problem that prior art that provides in the above-mentioned background art exists, provide a neotype MCU reset circuit device.
A novel MCU reset circuit device comprises resistors R1-R10, capacitors C1-C2, a diode D1, triodes Q1 and Q3, an MOS tube Q2, a comparator U1 and an external switch button J1;
the input end of the Reset circuit device is 3.3V voltage and outputs a Reset signal;
the input end is connected with a triode Q1 and a MOS tube Q2, the triode Q1 is grounded through an external switch button J1, the triode Q1 and the MOS tube Q2 are connected with a comparator U1 through a resistor and a capacitor, the comparator U1 is connected with a diode D1 and a triode Q3, and the triode Q3 outputs a level signal serving as a Reset signal.
Furthermore, in the triode Q1, the port 1 and the port 2 are both grounded through the external switch button J1, and a key _ detection signal is output at the same time.
Further, the triode Q1 and the MOS transistor Q2 are connected to the inverting input terminal of the comparator U1.
Further, the non-inverting input terminal of the comparator U1 is connected to a voltage input of 1.65V.
Further, a VCCS input shunt is provided between the comparator U1 and the diode D2.
Further, the external switch button J1 is turned on after being pressed for a long time, so that the triode Q1 is turned on, the MOS transistor Q2 is turned off, the capacitor C1 starts to discharge through the resistor R4, the level is gradually reduced from 3.3V, and delayed reset after the button is pressed is realized.
The utility model discloses the beneficial effect who reaches does: a reset circuit device is provided, which can realize two functions of reset and restoration only by one button. The operation is simple, the operation can be completely assisted by a client, and after-sales personnel are not required to go to the door to perform local program burning and updating. The duration of the recovery signal is detected during the recovery operation, so that the reset operation and the recovery operation are obviously distinguished, and the method is friendly to clients.
Drawings
Fig. 1 is a circuit diagram of a reset circuit device according to an embodiment of the present invention.
Fig. 2 is a waveform diagram of the Reset signal and the Key _ Detection signal in the embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.
Referring to fig. 1, the reset circuit device includes resistors R1-R10, capacitors C1-C2, a diode D1, triodes Q1 and Q3, a MOS transistor Q2, a comparator U1 and an external switch button J1.
In normal operation, Q1 is not conducted, Q2 is conducted, the voltage of the 6 pin of U1 is 3.3V, and the output level of the comparator is low.
When the J1 button is pressed for a certain time (short circuits J1-1 and J1-2), Q1 is conducted, Q2 is turned off, C1 starts discharging through R4, the level is gradually reduced from 3.3V, delay reset after the button is pressed is achieved, and reset caused by mistaken touch of the button is reduced. When the voltage is reduced to below 1.65V, the output of the comparator is inverted, the C2 is charged and is approximately short-circuited at the moment, so that the Q3 is switched on temporarily, a Reset signal is pulled down, and the MCU is Reset. After C2 is full, Q3 is cut off, and the function of sending a Reset signal only once when a button is pressed for a long time is realized.
After the button is released, the comparator outputs low level again, the capacitor C2 is rapidly discharged through the internal GND of the comparator and the diode D1, and the resistor R9, so that the function of repeatedly carrying out reset operation in a short time is realized.
If the program needs to be restored, the button can be pressed for a long time and is not loosened, after the MCU is restarted, the 'Key _ Detection' signal is detected to be pulled down for a period of time (software defined time length), the MCU restores the factory program from the program backup area, and the external display lamp or the screen enters a program burning indication state.
Specifically, referring to FIG. 2, after the button is pressed, the KD waveform is pulled low, and Reset is briefly pulled low after a period of time to Reset the MCU. If the button is released immediately and pressed again, the same function can still be realized, and the function cannot be discharged and failed in time due to frequent operation.
Holding the button continuously pulls the KD signal low continuously, which also results in a Reset signal being pulled low only once.
Releasing the button, the KD signal is pulled high and the Reset signal no longer changes.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment, but all equivalent modifications or changes made by those skilled in the art according to the present invention should be included in the protection scope of the claims.
Claims (6)
1. The utility model provides a novel MCU reset circuit device which characterized in that:
the reset circuit device comprises resistors R1-R10, capacitors C1-C2, a diode D1, triodes Q1 and Q3, an MOS transistor Q2, a comparator U1 and an external switch button J1;
the input end of the Reset circuit device is 3.3V voltage and outputs a Reset signal;
the input end is connected with a triode Q1 and a MOS tube Q2, the triode Q1 is grounded through an external switch button J1, the triode Q1 and the MOS tube Q2 are connected with a comparator U1 through a resistor and a capacitor, the comparator U1 is connected with a diode D1 and a triode Q3, and the triode Q3 outputs a level signal serving as a Reset signal.
2. The novel MCU reset circuit arrangement of claim 1, wherein: in the triode Q1, a port 1 and a port 2 are both grounded through an external switch button J1, and a key _ detection signal is output at the same time.
3. The novel MCU reset circuit arrangement of claim 1, wherein: the triode Q1 and the MOS transistor Q2 are connected with the inverting input end of the comparator U1.
4. The novel MCU reset circuit arrangement of claim 1, wherein: the non-inverting input terminal of the comparator U1 is connected with a voltage input of 1.65V.
5. The novel MCU reset circuit arrangement of claim 1, wherein: a VCCS input shunt circuit is arranged between the comparator U1 and the diode D2.
6. The novel MCU reset circuit arrangement of claim 1, wherein: the external switch button J1 is switched on after being pressed for a long time, so that the triode Q1 is switched on, the MOS transistor Q2 is switched off, the capacitor C1 starts to discharge through the resistor R4, the level is gradually reduced from 3.3V, and delayed reset after the button is pressed is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023209300.0U CN213690290U (en) | 2020-12-28 | 2020-12-28 | Novel MCU reset circuit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023209300.0U CN213690290U (en) | 2020-12-28 | 2020-12-28 | Novel MCU reset circuit device |
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| Publication Number | Publication Date |
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| CN213690290U true CN213690290U (en) | 2021-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023209300.0U Active CN213690290U (en) | 2020-12-28 | 2020-12-28 | Novel MCU reset circuit device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114326907A (en) * | 2022-01-12 | 2022-04-12 | 上海南芯半导体科技股份有限公司 | Novel POR circuit |
-
2020
- 2020-12-28 CN CN202023209300.0U patent/CN213690290U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114326907A (en) * | 2022-01-12 | 2022-04-12 | 上海南芯半导体科技股份有限公司 | Novel POR circuit |
| CN114326907B (en) * | 2022-01-12 | 2024-04-12 | 上海南芯半导体科技股份有限公司 | Novel POR circuit |
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