Pulse reset circuit and electronic equipment
The reset control unit controls the switch component to turn on and off, forcing the charging component to charge, and sending a reset signal to the reset pin of the microprocessor, solving the problem that the microprocessor cannot restart when internal interference is encountered, and improving the interference recovery efficiency of the microprocessor.
Patent Information
- Application Number
- CN202421257319.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-03
AI Technical Summary
In the prior art, when interference acts on the internal chip of the microprocessor, the power supply system of the electronic device will not restart, resulting in the inability to generate high pulses through the reset circuit to enable the microprocessor to complete the restart.
The reset control unit controls the switch assembly to turn on and off, thus forcing the charging assembly to charge and sending a reset signal to the reset pin of the microprocessor to restart the microprocessor.
Improves the efficiency of microprocessor interference recovery, allowing the microprocessor to restart effectively when disturbed.
Smart Images
Figure CN222674293U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of reset circuits, and in particular to a pulse reset circuit and an electronic device. Background Art
[0002] There is a reset pin in the microprocessor of the electronic device. In the prior art, when the microprocessor is disturbed, a reset circuit can be used to give a high pulse to the reset pin at the moment of powering on, so that the microprocessor can be restarted to solve the interference problem. However, when the interference acts on the chip inside the microprocessor, the power supply system of the electronic device will not restart, and it is impossible to generate a high pulse by powering on the reset circuit to complete the restart of the microprocessor. It is necessary to propose a pulse reset circuit that restarts the microprocessor. Utility Model Content
[0003] The embodiment of the present application provides a pulse reset circuit and an electronic device, which can control the switch component to be turned on and off through the reset control unit to force the charging component to charge, thereby sending a reset signal to the reset pin of the microprocessor to restart the microprocessor, thereby improving the efficiency of the microprocessor interference recovery. The technical solution is as follows:
[0004] In a first aspect, an embodiment of the present application provides a pulse reset circuit, characterized in that the circuit includes: a microprocessor, a reset control unit, a switch component, a reset power supply and a charging component;
[0005] A first end of the charging component is connected to a reset power supply, a second end of the charging component is grounded, and a third end of the charging component is connected to a reset pin of the microprocessor;
[0006] One end of the reset control unit is connected to the microprocessor, the other end of the reset control unit is connected to the control port of the switch component, the input port of the switch component is connected to the first end of the charging component, and the output port of the switch component is connected to the second end of the charging component;
[0007] The reset control unit sends a conduction signal to the switch component, the switch component switches to a conduction state based on the conduction signal, and the output current of the reset power supply flows to the ground through the switch component;
[0008] The reset control unit sends a cutoff signal to the switch component, and the switch component switches to the cutoff state based on the cutoff signal. The output current of the reset power supply flows to the reset pin via the charging component to send a reset signal to the microprocessor via the reset pin, and the microprocessor performs a restart process based on the reset signal.
[0009] In a second aspect, an embodiment of the present application provides an electronic device, and the electronic device includes the above-mentioned pulse reset circuit.
[0010] In one or more embodiments of the present application, the reset control unit sends a conduction signal to the switch component, the switch component switches to the conduction state based on the conduction signal, the output current of the reset power supply flows to the ground via the switch component, the reset control unit sends a cutoff signal to the switch component, the switch component switches to the cutoff state based on the cutoff signal, the output current of the reset power supply flows to the reset pin via the charging component, so as to send a reset signal to the microprocessor via the reset pin, and the microprocessor performs a restart process based on the reset signal. The reset control unit controls the switch component to be turned on and off, thereby forcing the charging component to charge, thereby sending a reset signal to the reset pin of the microprocessor to restart the microprocessor, thereby improving the efficiency of the microprocessor interference recovery. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0012] Figure 1 It is a structural schematic diagram of a pulse reset circuit provided in an embodiment of the present application;
[0013] Figure 2 It is a structural schematic diagram of a pulse reset circuit provided in an embodiment of the present application;
[0014] Figure 3 is a structural schematic diagram of a switch assembly provided in an embodiment of the present application;
[0015] Figure 4 It is a structural schematic diagram of a pulse reset circuit provided in an embodiment of the present application;
[0016] Figure 5 It is a structural schematic diagram of a pulse reset circuit provided in an embodiment of the present application;
[0017] Figure 6 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0019] In the description of the present application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are an "or" relationship.
[0020] The pulse reset circuit provided in the present application is described in detail below in conjunction with specific embodiments.
[0021] See also Figure 1 , which is a schematic diagram of the structure of a pulse reset circuit provided in an embodiment of the present application. Figure 1 As shown, the pulse reset circuit in the embodiment of the present application may include: a microprocessor 11, a reset control unit 12, a switch component 13, a reset power supply 14 and a charging component 15, wherein a first end of the charging component 15 is connected to the reset power supply 14, a second end of the charging component 15 is grounded, a third end of the charging component 15 is connected to a reset pin of the microprocessor 11, one end of the reset control unit 12 is connected to the microprocessor 11, the other end of the reset control unit 12 is connected to a control port of the switch component 13, an input port of the switch component 13 is connected to a first end of the charging component 15, and an output port of the switch component 15 is connected to a second end of the charging component 15.
[0022] Among them, the microprocessor 11 can be a central processing unit composed of one or a few large-scale integrated circuits, which can complete operations such as fetching instructions, executing instructions, and exchanging information with external memory and logic components, and is used to complete the operation control function of the electronic device. It is understandable that during the operation of the microprocessor 11, it may be disturbed, resulting in abnormal operation or even crash. The microprocessor 11 may have a reset pin. When the microprocessor 11 receives a reset signal via the reset pin, the microprocessor 11 can be restarted to get out of the disturbed state. Among them, the reset pin of the microprocessor 11 can be a high-effective reset pin, that is, the reset signal can be a high-level pulse. In the prior art, a high-level reset circuit can be used to give a high-level pulse to the reset pin at the moment of power-on to restart the microprocessor 11, but when the interference acts on the internal chip of the microprocessor 11, the reset power supply 14 will not restart, resulting in the reset pin being unable to recognize the reset signal and the microprocessor 11 being unable to restart.
[0023] In order to solve the above problems, there is a reset control unit 12 and a switch component 13 in the pulse reset circuit in the embodiment of the present application. The reset control unit 12 can be a microcontroller unit (MCU), also known as a single chip microcomputer (Single Chip Microcomputer) or a single chip microcomputer, which appropriately reduces the frequency and specifications of the central processing unit, and integrates peripheral interfaces such as memory, counter (Timer), universal serial bus (USB), analog to digital conversion (ADC), universal asynchronous receiver and transmitter (UART), programmable logic controller (PLC), direct memory access (DMA), and even liquid crystal display (LCD) drive circuit on a single chip to form a chip-level computer. The reset control unit 12 is connected to the microprocessor 11, and can detect whether the microprocessor 11 is running normally. If it is detected that the microprocessor 11 is abnormally running or shutting down, the microprocessor 11 can be restarted by controlling the switch component 13 to be turned on or off.
[0024] The switch component 13 may have a control port, an input port, and an output port. The control port is used to control whether the switch component 13 is in an on state or an off state. When the switch component 13 is in an on state, current can be allowed to flow from the input port to the output port. When the switch component 13 is in an off state, current cannot flow through the switch component 13, which is equivalent to an open circuit state. Since the control port of the switch component 13 is connected to the reset control unit 12, if the reset control unit 12 sends a turn-on signal to the switch component 13, the switch component 13 can be switched to an on state. If the reset control unit 12 sends a cut-off signal to the switch component 13, the switch component 13 can be switched to an off state. The charging component 15 is connected to the reset power supply 14. When the reset power supply 14 is in an on state, the charging component 15 can be charged. When the charging component 15 is in a charging state, current can flow through the charging component 15. When the charging component 15 is finished charging, current cannot flow through the charging component 15, which is equivalent to an open circuit state.
[0025] When the reset control unit 12 detects that the microprocessor 11 is in an abnormal operating state such as shutdown, it can send a conduction signal to the switch component 13, and the switch component 13 switches to the conduction state based on the conduction signal. At this time, the output current of the reset power supply 14 flows to the ground through the switch component 13, and the voltage of the first end of the charging component 15 is pulled down to the ground voltage. Then the reset control unit 12 can send a cut-off signal to the switch component 13, and the switch component 13 can be switched to the cut-off state based on the cut-off signal. At this time, the output current of the reset power supply 14 cannot pass through the switch component 13, and because the voltage of the first end of the charging component 15 was previously pulled down to the ground voltage, the charging component 15 will start charging when the switch component 13 is switched to the cut-off state again. At this time, the output current of the reset power supply can flow to the reset pin of the microprocessor 11 through the charging component 15, so as to send a reset signal to the microprocessor 11 through the reset pin, and the microprocessor 11 can restart based on the reset signal to get out of the abnormal operating state affected by the interference. It can be understood that if the reset pin is a high-effective reset pin, when the charging component 15 is in a charging state, the output current of the reset power supply will flow to the reset pin. When the charging component 15 is finished charging, the output current cannot flow from the charging component 15 to the reset pin, which is equivalent to giving the reset pin a high pulse signal, that is, a reset signal.
[0026] In the embodiment of the present application, the reset control unit sends a conduction signal to the switch component, the switch component switches to the conduction state based on the conduction signal, the output current of the reset power supply flows to the ground via the switch component, the reset control unit sends a cutoff signal to the switch component, the switch component switches to the cutoff state based on the cutoff signal, the output current of the reset power supply flows to the reset pin via the charging component, so as to send a reset signal to the microprocessor via the reset pin, and the microprocessor performs a restart process based on the reset signal. The reset control unit controls the switch component to be turned on and off, thereby forcing the charging component to charge, thereby sending a reset signal to the reset pin of the microprocessor to restart the microprocessor, thereby improving the efficiency of the microprocessor interference recovery.
[0027] See also Figure 2 , a schematic diagram of the structure of a pulse reset circuit is provided for an embodiment of the present application. The pulse reset circuit of the present application may include: a microprocessor 11, a reset control unit 12, a switch component 13, a reset power supply 14 and a charging component 15, wherein the charging component 15 includes a reset capacitor C1 and a reset resistor R1. The first end of the reset capacitor C1 is connected to the reset power supply 14, the second end of the reset capacitor C1 is connected to the reset pin of the microprocessor 11, the first end of the reset resistor R1 is connected to the second end of the reset capacitor C1, the second end of the reset capacitor R1 is grounded, one end of the reset control unit 12 is connected to the microprocessor 11, the other end of the reset control unit 12 is connected to the control port of the switch component 13, the input port of the switch component 13 is connected to the first end of the reset capacitor C1, and the output port of the switch component 15 is connected to the second end of the reset resistor R1. The charging component 15 is connected to the reset capacitor C1. When the reset power supply 14 is in the on state, the reset capacitor C1 can be charged. When the reset capacitor C1 is in the charging state, current can flow through the reset capacitor C1. When the reset capacitor C1 is charged, current cannot flow through the reset capacitor C1, which is equivalent to an open circuit state.
[0028] When the reset control unit 12 detects that the microprocessor 11 is in an abnormal operating state such as shutdown, it can send a conduction signal to the switch component 13, and the switch component 13 switches to the conduction state based on the conduction signal. At this time, the output current of the reset power supply 14 flows to the ground through the switch component 13, and the voltage of the first end of the reset capacitor C1 is pulled down to the ground voltage. Then the reset control unit 12 can send a cut-off signal to the switch component 13, and the switch component 13 can be switched to the cut-off state based on the cut-off signal. At this time, the output current of the reset power supply 14 cannot pass through the switch component 13, and because the voltage of the first end of the reset capacitor C1 was previously pulled down to the ground voltage, the reset capacitor C1 will start to charge when the switch component 13 is switched to the cut-off state again. At this time, the output current of the reset power supply can flow to the ground through the reset capacitor C1 and the reset resistor R1, and flow to the reset pin of the microprocessor 11 through the reset capacitor C1, so as to send a reset signal to the microprocessor 11 through the reset pin, and the microprocessor 11 can be restarted based on the reset signal to get out of the abnormal operating state that is disturbed. It can be understood that if the reset pin is a high-effective reset pin, when the reset capacitor C1 is in a charging state, the output current of the reset power supply will flow to the reset pin. When the reset capacitor C1 is fully charged, the output current cannot flow from the reset capacitor C1 to the reset pin, which is equivalent to giving the reset pin a high pulse signal, that is, a reset signal, so that the microprocessor 11 performs a restart process.
[0029] Optionally, the microprocessor 11 may send a heartbeat signal to the reset control unit 12 at a preset frequency. The preset frequency may be an initial setting of the microprocessor 11 or the reset control unit 12, or may be set by a user or relevant staff. The heartbeat signal is used to inform the reset control unit 12 that the microprocessor 11 is in a normal operating state. The heartbeat signal may be data including a data check bit, and the data check bit is used to ensure the accuracy and security of the heartbeat signal. It is understandable that if the reset control unit 12 does not receive the heartbeat signal sent by the microprocessor 11 at the time point corresponding to the preset frequency, or receives a heartbeat signal with an incorrect data check bit, the reset control unit 12 may confirm that the microprocessor 11 is in an abnormal operating state, and send a reset signal to the microprocessor 11 based on the switch component 13 to cause the microprocessor 11 to perform a restart process.
[0030] Optionally, the microprocessor 11 and the reset control unit 12 can be connected by a serial port or an Inter-Integrated Circuit (I2C) bus, and multiple communication interfaces can be used to avoid errors caused by a single heartbeat signal, thereby further improving the accuracy of the heartbeat signal.
[0031] Optionally, the reset control unit 12 may have input / output pins (General-purpose Input / Output, GPIO), and the control port of the switch component 13 is connected to the input / output pins of the reset control unit 12. The reset control unit 12 sends an on signal and an off signal to the switch component 13 through the input / output pins. For example, the on signal may be a high-level signal "1" sent by the reset control unit 12 through the input / output pin, and the off signal may be a low-level signal "0" sent by the reset control unit 12 through the input / output pin.
[0032] Optionally, the pulse reset circuit may further include a second resistor, one end of the second resistor is connected to the reset control unit 12, and the other end of the second resistor is connected to the control port of the switch component 13. The second resistor may serve as a protection resistor between the reset control unit 12 and the switch component 13.
[0033] Optional, see Figure 3 , a schematic diagram of the structure of a switch assembly is provided for an embodiment of the present application, such as Figure 3 As shown, the switch component 13 may include a transistor 131 and a first resistor R2, one end of the first resistor R2 is connected to the reset power supply 14, and the other end of the first resistor R2 is connected to the first end of the charging component 15. The transistor 131 may have a control port, an input port, and an output port. The control port is used to control whether the transistor 131 is in an on state or an off state. When the transistor 131 is in an on state, current can be allowed to flow from the input port to the output port. When the transistor 131 is in an off state, current cannot pass through the transistor 131, which is equivalent to an open circuit state. The control port of the transistor 131 is connected to the reset control unit 12, the input port of the transistor 131 is connected to the first end of the charging component 15, and the output port of the transistor 131 is connected to the second end of the charging component 15. If the reset control unit 12 sends a turn-on signal to the transistor 131, the transistor 131 can be switched to the on state, and if the reset control unit 12 sends a turn-off signal to the transistor 131, the transistor 131 can be switched to the turn-off state.
[0034] When the reset control unit 12 detects that the microprocessor 11 is in an abnormal operating state such as shutdown, it can send a conduction signal to the transistor 131, and the transistor 131 switches to the conduction state based on the conduction signal. At this time, the output current of the reset power supply 14 flows to the ground via the first resistor R1 and the transistor 131, and the first terminal voltage of the charging component 15 is pulled down to the ground voltage. Then the reset control unit 12 can send a cut-off signal to the transistor 131, and the transistor 131 can switch to the cut-off state based on the cut-off signal. At this time, the output current of the reset power supply 14 cannot pass through the switch component 13, and the charging component 15 is forced to start charging. The output current of the reset power supply 14 flows to the reset pin of the microprocessor 11 via the first resistor R1 and the charging component 15.
[0035] Optionally, the transistor 131 in the switch component 13 can be a triode, the base of the triode is connected to the reset control unit 12, the emitter of the triode is connected to the second end of the charging component 15, and the collector of the triode is connected to the first end of the charging component 15.
[0036] See also Figure 4, a schematic diagram of the structure of a pulse reset circuit is provided for an embodiment of the present application, wherein the pulse reset circuit may include: a microprocessor 11, a reset control unit 12, a switch component 13, a reset power supply 14, a charging component 15 and a second resistor R3, wherein the charging component 15 includes a reset capacitor C1 and a reset resistor R1, and the switch component 13 includes a transistor Q1 and a first resistor R2. The microprocessor 11 is connected to the reset control unit 12, one end of the first resistor R2 is connected to the reset power supply, the other end of the first resistor R2 is connected to the first end of the reset capacitor C1, the second end of the reset capacitor is connected to the reset pin of the microprocessor 11, the first end of the reset resistor R1 is connected to the reset capacitor C1, the second end of the reset resistor R2 is grounded, one end of the second resistor R3 is connected to the input / output pin of the reset control unit 12, the other end of the second resistor R3 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the first end of the reset capacitor C1, and the emitter of the transistor Q1 is connected to the second end of the reset resistor R1. When the reset control unit 12 detects that the microprocessor 11 is in an abnormal operating state such as shutdown, it can send a conduction signal to the transistor Q1, and the transistor Q1 switches to the conduction state based on the conduction signal. At this time, the output current of the reset power supply 14 flows to the ground through the first resistor R1 and the transistor Q1, and the first terminal voltage of the reset capacitor C1 is pulled down to the ground voltage. Then the reset control unit 12 can send a cut-off signal to the transistor Q1, and the transistor Q1 can switch to the cut-off state based on the cut-off signal. At this time, the output current of the reset power supply 14 cannot pass through the transistor Q1, and the charging component 15 is forced to start charging. The output current of the reset power supply 14 flows to the reset pin of the microprocessor 11 through the first resistor R1 and the reset capacitor C1, thereby sending a reset signal to the microprocessor 11 through the reset pin to restart the microprocessor 11.
[0037] Optionally, the transistor 131 in the switch component 13 can be a MOS tube, the gate of the MOS tube is connected to the reset control unit 12, the source of the MOS tube is connected to the second end of the charging component 15, and the drain of the MOS tube is connected to the first end of the charging component 15.
[0038] See also Figure 5, a schematic diagram of the structure of a pulse reset circuit is provided for an embodiment of the present application, wherein the pulse reset circuit may include: a microprocessor 11, a reset control unit 12, a switch component 13, a reset power supply 14, a charging component 15 and a second resistor R3, wherein the charging component 15 includes a reset capacitor C1 and a reset resistor R1, and the switch component 13 includes a MOS tube Q2 and a first resistor R2. The microprocessor 11 is connected to the reset control unit 12, one end of the first resistor R2 is connected to the reset power supply, the other end of the first resistor R2 is connected to the first end of the reset capacitor C1, the second end of the reset capacitor is connected to the reset pin of the microprocessor 11, the first end of the reset resistor R1 is connected to the reset capacitor C1, the second end of the reset resistor R2 is grounded, one end of the second resistor R3 is connected to the input and output pins of the reset control unit 12, the other end of the second resistor R3 is connected to the gate of the MOS tube Q2, the drain of the MOS tube Q2 is connected to the first end of the reset capacitor C1, and the source of the MOS tube Q2 is connected to the second end of the reset resistor R1. When the reset control unit 12 detects that the microprocessor 11 is in an abnormal operating state such as shutdown, it can send a conduction signal to the transistor Q1, and the MOS tube Q2 switches to the conduction state based on the conduction signal. At this time, the output current of the reset power supply 14 flows to the ground via the first resistor R1 and the MOS tube Q2, and the first terminal voltage of the reset capacitor C1 is pulled down to the ground voltage. Then the reset control unit 12 can send a cut-off signal to the MOS tube Q2, and the MOS tube Q2 can be switched to the cut-off state based on the cut-off signal. At this time, the output current of the reset power supply 14 cannot pass through the MOS tube Q2, and the charging component 15 is forced to start charging. The output current of the reset power supply 14 flows to the reset pin of the microprocessor 11 via the first resistor R1 and the reset capacitor C1, thereby sending a reset signal to the microprocessor 11 via the reset pin, so that the microprocessor 11 performs a restart process.
[0039] In an embodiment of the present application, the reset control unit sends a conduction signal to the transistor, which can be a triode or a MOS tube. The transistor switches to a conduction state based on the conduction signal, and the output current of the reset power supply flows to the ground via the transistor. The reset control unit sends a cutoff signal to the switch component, and the transistor switches to a cutoff state based on the cutoff signal to force the reset capacitor to charge. When the reset capacitor is charged, the output current of the reset power supply flows to the reset pin via the first resistor and the reset capacitor. When the reset capacitor is charged, the output current of the reset power supply can no longer pass through the reset capacitor, thereby sending a high-level pulse to the reset pin to send a reset signal to the microprocessor via the reset pin, and the microprocessor performs a restart process based on the reset signal. The reset control unit controls the switch component to be turned on and off, thereby forcing the charging component to charge, thereby sending a reset signal to the reset pin of the microprocessor to restart the microprocessor, thereby improving the efficiency of microprocessor interference recovery.
[0040] See also Figure 6 , Figure 6 A structural schematic diagram of an electronic device is disclosed for the purpose of applying for an embodiment. The electronic device 20 may specifically include a shell and a pulse reset circuit 10. The pulse reset circuit 10 is encapsulated in an accommodating space formed inside the shell. The specific structure and working principle of the pulse reset circuit can be found in the specific description of the above embodiment and will not be repeated here.
[0041] The above disclosure is only the preferred embodiment of the present application, which certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope covered by the present application.
Claims
1. A pulse reset circuit, characterized in that: include: Microprocessor, reset control unit, switch assembly, reset power supply and charging assembly; The first end of the charging component is connected to the reset power supply, the second end of the charging component is grounded, and the third end of the charging component is connected to the reset pin of the microprocessor; One end of the reset control unit is connected to the microprocessor, the other end of the reset control unit is connected to the control port of the switch component, the input port of the switch component is connected to the first end of the charging component, and the output port of the switch component is connected to the second end of the charging component; The reset control unit sends a conduction signal to the switch component, the switch component switches to a conduction state based on the conduction signal, and the output current of the reset power supply flows to the ground via the switch component; The reset control unit sends a cutoff signal to the switch component, and the switch component switches to a cutoff state based on the cutoff signal. The output current of the reset power supply flows to the reset pin via the charging component to send a reset signal to the microprocessor via the reset pin, and the microprocessor performs a restart process based on the reset signal.
2. The circuit according to claim 1, characterized in that The microprocessor sends a heartbeat signal to the reset control unit at a preset frequency.
3. The circuit according to claim 1, characterized in that The charging component includes: a reset capacitor and a reset resistor; The first end of the reset capacitor is connected to the reset power supply, the second end of the reset capacitor is connected to the reset pin of the microprocessor, the first end of the reset resistor is connected to the second end of the reset capacitor, and the second end of the reset resistor is grounded; The input port of the switch component is connected to the first end of the reset capacitor, and the output port of the switch component is connected to the second end of the reset resistor.
4. The circuit according to claim 1, characterized in that The switch component includes: a transistor and a first resistor; One end of the first resistor is connected to the reset power supply, and the other end of the first resistor is connected to the first end of the charging component; The control port of the transistor is connected to the reset control unit, the input port of the transistor is connected to the first end of the charging component, and the output port of the transistor is connected to the second end of the charging component.
5. The circuit according to claim 4, characterized in that The transistor is a triode; The base of the transistor is connected to the reset control unit, the emitter of the transistor is connected to the second end of the charging component, and the collector of the transistor is connected to the first end of the charging component.
6. The circuit according to claim 4, characterized in that The transistor is a MOS tube; The gate of the MOS tube is connected to the reset control unit, the source of the MOS tube is connected to the second end of the charging component, and the drain of the MOS tube is connected to the first end of the charging component.
7. The circuit according to claim 1, characterized in that The control port of the switch component is connected to the input and output pins of the reset control unit.
8. The circuit according to claim 1, characterized in that The circuit also includes a second resistor; One end of the second resistor is connected to the reset control unit, and the other end of the second resistor is connected to the control port of the switch component.
9. An electronic device, characterized in that: Comprising a pulse reset circuit as described in any one of claims 1-8.