CN220962359U - Compound key hardware forced reset circuit - Google Patents
Compound key hardware forced reset circuit Download PDFInfo
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- CN220962359U CN220962359U CN202323049194.8U CN202323049194U CN220962359U CN 220962359 U CN220962359 U CN 220962359U CN 202323049194 U CN202323049194 U CN 202323049194U CN 220962359 U CN220962359 U CN 220962359U
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- diode
- reset
- key
- main control
- control mcu
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- 150000001875 compounds Chemical class 0.000 title claims description 10
- 239000003990 capacitor Substances 0.000 claims abstract description 15
- 239000002131 composite material Substances 0.000 claims abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The composite key hardware forced reset circuit comprises a main control MCU and a composite key reset circuit, wherein the composite key reset circuit comprises a first functional key, a second functional key, a first diode and a second diode, the anode of the first diode is connected with the common end of the first functional key and a first resistor and is connected with a first input pin of the main control MCU, and the cathode of the first diode is connected with a reset pin of the main control MCU; the anode of the second diode is connected with the common end of the second function key and the second resistor, and the cathode of the second diode is connected with the reset pin of the main control MCU; one end of the capacitor is connected with the reset pin of the main control MCU, the other end of the capacitor is grounded, one end of the third resistor is connected with the reset pin of the main control MCU, and the other end of the third resistor is grounded. The utility model does not influence the normal function of the key, realizes the forced power-off reset function of the hardware of the electronic product with the battery, can easily finish restarting when the system is dead, and does not need to wait for the exhaustion of the battery or the disassembly and maintenance.
Description
Technical Field
The utility model relates to a hardware forced reset circuit, in particular to a combined key hardware forced reset circuit.
Background
In some electric products with built-in lithium batteries, such as handheld beauty instruments, the sealing performance of the shell is quite good due to the factors of water resistance, static resistance, dust resistance and the like, so that the disassembly and assembly are quite troublesome; when the product is in a dead halt phenomenon, a user can only passively wait for the electricity consumption of the lithium battery for a long time, and after the main control MCU is powered off or the forced disassembly product is powered off, the product can be normally used after the product is powered off again, so that a great deal of precious time of the user is wasted, or the forced disassembly process of the user is increased, and the experience of the user is greatly reduced.
Disclosure of utility model
The utility model aims to provide a compound key hardware forced reset circuit which is used for solving the problems that when a system is halted in the prior art, the system cannot respond to external operation input and cannot be forced to be powered off and restarted, and only the battery is required to be exhausted, or the system is disassembled to be forced to be powered off, so that the problem is very inconvenient.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
The utility model provides a compound button hardware forced reset circuit, including master control MCU and compound button reset circuit, compound button reset circuit includes first function button, second function button, first diode and second diode, the one end ground connection of first function button and second function button, the other end of first function button is connected with the power through first resistance, the other end of second function button is connected with the power through the second resistance; the positive electrode of the first diode is connected with the common end of the first functional key and the first resistor and is connected with the first input pin of the main control MCU, and the negative electrode of the first diode is connected with the reset pin of the main control MCU; the anode of the second diode is connected with the common end of the second function key and the second resistor, and the cathode of the second diode is connected with the reset pin of the main control MCU; one end of the capacitor is connected with the reset pin of the main control MCU, the other end of the capacitor is grounded, one end of the third resistor is connected with the reset pin of the main control MCU, and the other end of the third resistor is grounded.
As an improvement of the utility model, the main control MCU can adopt a chip with the model number of N32L406CBL 7.
The utility model adopts the main control MCU and the composite key reset circuit, wherein the composite key reset circuit comprises a first functional key, a second functional key, a first diode and a second diode, one ends of the first functional key and the second functional key are grounded, the other end of the first functional key is connected with a power supply through a first resistor, and the other end of the second functional key is connected with the power supply through a second resistor; the positive electrode of the first diode is connected with the common end of the first functional key and the first resistor and is connected with the first input pin of the main control MCU, and the negative electrode of the first diode is connected with the reset pin of the main control MCU; the anode of the second diode is connected with the common end of the second function key and the second resistor, and the cathode of the second diode is connected with the reset pin of the main control MCU; one end of the capacitor is connected with the reset pin of the main control MCU, the other end of the capacitor is grounded, one end of the third resistor is connected with the reset pin of the main control MCU, and the other end of the third resistor is grounded.
Drawings
Fig. 1 is a schematic circuit schematic diagram of an embodiment of the present utility model.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1, fig. 1 discloses a compound key hardware forced reset circuit, which comprises a main control MCU U1 and a compound key reset circuit 1, wherein the compound key reset circuit 1 comprises a first function key SW1, a second function key SW2, a first diode D1 and a second diode D2, one ends of the first function key SW1 and the second function key SW2 are grounded, the other ends of the first function key SW1 are connected with a power supply through a first resistor R1, and the other ends of the second function key SW2 are connected with the power supply through a second resistor R2; the positive electrode of the first diode D1 is connected with the common end of the first function key SW1 and the first resistor R1 and is connected with the first input pin IO1 of the main control MCU U1, and the negative electrode of the first diode D1 is connected with the RESET pin RESET of the main control MCU U1; the positive electrode of the second diode D2 is connected with the common end of the second function key SW2 and the second resistor R2, and the negative electrode of the second diode D2 is connected with the RESET pin RESET of the main control MCU U1; one end of the capacitor C1 is connected with the RESET pin RESET of the main control MCU U1, the other end of the capacitor C1 is grounded, one end of the third resistor R3 is connected with the RESET pin RESET of the main control MCU U1, and the other end of the third resistor R3 is grounded.
The utility model does not influence the normal function of the key, realizes the forced power-off reset function of the hardware of the electronic product with the battery, can easily finish restarting when the system is dead, and does not need to wait for battery exhaustion or disassembly and maintenance.
Preferably, the master control MCU U1 may be a chip with a model number of N32L406CBL 7.
In the utility model, a first function key SW1 and a second function key SW2 are connected with a RESET pin RESET of a main control MCU U1 through a first diode D1 and a second diode D2, and when the first function key SW1 and the second function key SW2 are not pressed down simultaneously, the common power-on RESET function can be realized due to the existence of a first resistor R1, a second resistor R2, the first diode D1, the second diode D2 and a capacitor C1;
When the first function key SW1 or the second function key SW2 is pressed independently, the logic circuit formed by the first diode D1 and the second diode D2 outputs a high level state unchanged, and the MCU U1 only executes normal corresponding functions;
When the first function key SW1 and the second function key SW2 are pressed simultaneously, the first diode D1 and the second diode D2 are turned off and cannot charge the capacitor C1, the stored electric quantity of the capacitor C1 is rapidly discharged due to the third resistor R3, the RESET pin RESET level of the main control MCU U1 is pulled down, the main control MCU U1 is RESET by hardware, after any one of the switches of the first function key SW1 and the second function key SW2 is released, the charging condition of the capacitor C1 is restored, the capacitor C1 is charged, the RESET pin RESET of the main control MCU U1 is restored to a high level, the main control MCU U1 ends the hardware RESET, and the product can be restored to normal operation.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (2)
1. A compound key hardware forced reset circuit is characterized in that: the intelligent electronic control unit comprises a main control MCU (U1) and a composite key reset circuit (1), wherein the composite key reset circuit (1) comprises a first functional key (SW 1), a second functional key (SW 2), a first diode (D1) and a second diode (D2), one ends of the first functional key (SW 1) and the second functional key (SW 2) are grounded, the other end of the first functional key (SW 1) is connected with a power supply through a first resistor (R1), and the other end of the second functional key (SW 2) is connected with the power supply through a second resistor (R2); the positive electrode of the first diode (D1) is connected with the common end of the first function key (SW 1) and the first resistor (R1) and is connected with the first input pin (IO 1) of the main control MCU (U1), and the negative electrode of the first diode (D1) is connected with the RESET pin (RESET) of the main control MCU (U1); the positive electrode of the second diode (D2) is connected with the common end of the second function key (SW 2) and the second resistor (R2), and the negative electrode of the second diode (D2) is connected with the RESET pin (RESET) of the main control MCU (U1); one end of a capacitor (C1) is connected with a RESET pin (RESET) of the main control MCU (U1), the other end of the capacitor (C1) is grounded, one end of a third resistor (R3) is connected with the RESET pin (RESET) of the main control MCU (U1), and the other end of the third resistor (R3) is grounded.
2. The hardware forced reset circuit of claim 1, wherein the master MCU (U1) is a chip of type N32L406CBL 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323049194.8U CN220962359U (en) | 2023-11-13 | 2023-11-13 | Compound key hardware forced reset circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323049194.8U CN220962359U (en) | 2023-11-13 | 2023-11-13 | Compound key hardware forced reset circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220962359U true CN220962359U (en) | 2024-05-14 |
Family
ID=90974085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323049194.8U Active CN220962359U (en) | 2023-11-13 | 2023-11-13 | Compound key hardware forced reset circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220962359U (en) |
-
2023
- 2023-11-13 CN CN202323049194.8U patent/CN220962359U/en active Active
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