Vehicle-mounted chip and electronic product

Abstract

The invention relates to the technical field of integrated circuits, in particular to a vehicle-mounted chip and an electronic product. The vehicle-mounted chip comprises a power supply control module, the power supply control module at least comprises an ignition actuator charging unit of the safety air bag, and under the condition that the ignition actuator charging unit is triggered, the power supply control module supplies power to an ignition actuator loop of the safety air bag through the ignition actuator charging unit; the voltage monitoring module is connected with the power supply control module and is used for monitoring the voltage output by the power supply control module and determining whether a reset event occurs or not; and the reset module is connected with the voltage monitoring module and is used for determining whether the reset event is normal or not based on the voltage output by the power supply control module and a preset filtering logic algorithm under the condition that the reset event exists. According to the invention, the voltage monitoring module and the reset module are configured with the digital filtering logic capable of being matched with the duration, so that the reliability of the safety airbag is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of integrated circuits, and in particular to a vehicle-mounted chip and an electronic product. Background Art

[0002] In recent years, with the steady development of automotive electronic technology, the safety issues of automobiles have become increasingly prominent. Airbags are an important safety device in automobiles. When a car collides, the airbag can be inflated and expanded quickly in a very short time to form a soft cushion to protect the driver's head, chest, face and other important parts from collision damage, thereby effectively reducing the casualty rate. Therefore, the research on the safety and reliability of airbags is very important.

[0003] However, when a car crashes, the airbag ignition actuator circuit or load may short-circuit or break with some components in the peripheral circuit, which in turn affects the electrical characteristics of some modules and causes circuit failures such as reset and sleep, affecting the normal progress of the airbag ignition process and endangering the lives of people in the car. Therefore, there is an urgent need for a vehicle-mounted chip and electronic product that can improve the reliability of the airbag to ensure that the airbag can work normally and orderly. Summary of the invention

[0004] Based on this, it is necessary to provide a vehicle-mounted chip and electronic products to improve the reliability of airbags.

[0005] In order to achieve the above object, on the one hand, a vehicle-mounted chip is provided, comprising:

[0006] A power control module, comprising at least an ignition actuator charging unit of the safety airbag, wherein when the ignition actuator charging unit is triggered, the power control module supplies power to the ignition actuator circuit of the safety airbag via the ignition actuator charging unit;

[0007] A voltage monitoring module, connected to the power control module, the voltage monitoring module is used to monitor the voltage output by the power control module to determine whether a reset event occurs;

[0008] A reset module is connected to the voltage monitoring module. When the reset event occurs, the reset module is used to determine whether the reset event is normal based on the voltage output by the power control module and a preset filtering logic algorithm.

[0009] In one of the embodiments, when the reset module determines that the reset event is normal, a system reset signal is issued to stop the power control module from supplying power to the ignition actuator circuit of the airbag.

[0010] In one of the embodiments, when the reset module determines that the reset event is abnormal, the reset enable is shielded.

[0011] In one of the embodiments, the voltage monitoring module includes a comparison unit, and the comparison unit is used to compare the voltage output by the power control module with a voltage threshold and output a comparison result.

[0012] In one embodiment, the power control module includes at least one selection unit, the selection unit is connected to the comparison unit, and the selection unit is used to output different reference voltages.

[0013] In one embodiment, the power control module includes:

[0014] Input terminal, used to connect to the power supply;

[0015] A boost unit, wherein an input interface of the boost unit is connected to the input end, and an output interface of the boost unit is connected to the ignition actuator charging unit.

[0016] In one of the embodiments, the on-board chip has a standby mode and an operating mode, and when the on-board chip receives a first preset instruction, the on-board chip is in the operating mode.

[0017] In one embodiment, the vehicle-mounted chip includes:

[0018] A temperature monitoring module, connected to the reset module, and used to determine whether the temperature output by the temperature monitoring module is abnormal;

[0019] and / or,

[0020] The interaction monitoring module is connected to the reset module, and the reset module is used to determine whether the interaction result output by the interaction monitoring module is abnormal.

[0021] On the other hand, an electronic product is also provided, comprising:

[0022] Accelerometer;

[0023] The vehicle-mounted chip as described in any of the above embodiments, wherein the vehicle-mounted chip is used to receive the signal sent by the acceleration sensor, and determine whether to trigger the ignition actuator charging unit of the airbag based on the signal sent by the acceleration sensor;

[0024] The safety airbag comprises an ignition actuator circuit, wherein the ignition actuator circuit is electrically connected to an ignition actuator charging unit of the safety airbag.

[0025] In one embodiment, the electronic product further comprises:

[0026] The main control chip is connected to the reset module, and when receiving a second preset instruction sent by the acceleration sensor, the main control chip controls the reset module to stop resetting.

[0027] The vehicle-mounted chips and electronic products of this manual can accurately determine whether the reset event is normal based on the voltage output by the power control module and the preset filtering logic algorithm by setting the reset module, and then control whether the airbag is inflated, thereby ensuring the safety of the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of an electronic product provided in an embodiment;

[0030] Figure 2 Schematic diagram of a vehicle-mounted chip provided in an embodiment.

[0031] Explanation of the reference numerals: vehicle-mounted chip-100; power control module-110; ignition actuator charging unit-111; input end-112; boost unit-113; voltage monitoring module-120; reset module-130; temperature monitoring module-140; interactive monitoring module-150; acceleration sensor-200; airbag-300.

[0032] In order to better describe and illustrate the embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more drawings. The additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, the embodiments and / or examples currently described, and the best modes of these inventions currently understood. DETAILED DESCRIPTION

[0033] In order to facilitate understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thorough and comprehensive.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0035] In each embodiment, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in each embodiment can be understood according to the specific situation.

[0036] It should be understood that when an element or layer is referred to as "on ...", "adjacent to ...", "connected to" other elements or layers, it can be directly on, adjacent to, connected to or coupled to other elements or layers, or there can be intervening elements or layers. On the contrary, when an element is referred to as "directly on ...", "directly adjacent to ...", "directly connected to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. can be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, doping type or part from another element, component, region, layer or part. Therefore, without departing from the teaching of the present embodiment, the first element, component, region, layer, doping type or part discussed below can be represented as a second element, component, region, layer or part.

[0037] Spatial relationship terms such as "under", "below", "below", "under", "above", "above", etc., may be used herein to describe the relationship between an element or feature shown in the figures and other elements or features. It should be understood that in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is turned over, the element or feature described as "under other elements" or "under it" or "under it" will be oriented as "on" other elements or features. Therefore, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0038] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that when the terms "consisting of" and / or "comprising" are used in this specification, the presence of the features, integers, steps, operations, elements and / or parts can be determined, but the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups is not excluded. At the same time, when used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0039] Embodiments of the present specification are described herein with reference to schematic diagrams as idealized embodiments of the present specification, and variations in the shapes shown due to, for example, manufacturing techniques and / or tolerances are anticipated. Therefore, the embodiments of the present specification should not be limited to the specific shapes of the regions shown herein, but include deviations in shapes due to, for example, manufacturing techniques. The regions shown in the figures are schematic in nature, and their shapes do not represent the actual shapes of the regions of the device, and do not limit the scope of the embodiments of the present specification.

[0040] See also Figure 1 In one embodiment, an electronic product is provided. As an example, the electronic product may be a vehicle such as a car. The electronic product provided in this embodiment may at least include a vehicle-mounted chip 100 (such as Figure 2 As shown), acceleration sensor 200 and airbag 300.

[0041] The acceleration sensor 200 is used to measure the acceleration of electronic products such as automobiles. When an electronic product such as an automobile collides, the acceleration sensor 200 can quickly detect an abnormal acceleration signal generated by the collision. As an example, the acceleration sensor 200 may include a piezoelectric acceleration sensor, a piezoresistive acceleration sensor, or a capacitive acceleration sensor. This embodiment does not specifically limit the form of the acceleration sensor 200.

[0042] The airbag 300 can be used to inflate when a car or other electronic product collides, thereby protecting important parts of the driver and passenger, such as the head, chest, and face. Specifically, when a car or other electronic product collides, the airbag 300 can be quickly inflated and expanded in a short time to form a soft cushion. For example, the airbag 300 can include an airbag body and an ignition actuator circuit. The ignition actuator circuit can discharge, thereby igniting the chemical substances inside the airbag body and generating a large amount of gas (for example, inert gas such as nitrogen or argon), so that the airbag 300 can be quickly inflated and expanded.

[0043] See also Figure 2, the vehicle-mounted chip 100 may have a power control module 110, a voltage monitoring module 120 and a reset module 130. The power control module 110 may have an input terminal 112 and multiple output terminals, and the input terminal 112 of the power control module 110 may be used to access the power supply. The power control module 110 may have multiple units inside, and the multiple units may be used to distribute the power connected to the input terminal 112 and output from multiple output terminals. The voltage monitoring module 120 can be connected to multiple output terminals of the power control module 110 and obtain the voltage output by the multiple output terminals of the power control module 110. The reset module 130 is connected to the voltage monitoring module 120, and determines whether a reset event occurs based on the voltage obtained by the voltage monitoring module 120. If a reset event occurs, the reset module 130 determines whether the reset event is normal based on a preset filtering logic algorithm.

[0044] In addition, the power control module 110 may include at least an ignition actuator charging unit 111 of the airbag 300. The ignition actuator charging unit 111 of the airbag 300 may be electrically connected to an ignition actuator circuit of the airbag 300. When the ignition actuator charging unit 111 is triggered, the power control module 110 supplies power to the ignition actuator circuit of the airbag 300 via the ignition actuator charging unit 111, thereby inflating the airbag 300.

[0045] The following is an exemplary description of the working process of the electronic product provided in this embodiment. When a collision event occurs in an electronic product such as an automobile, the acceleration sensor 200 detects an abnormal acceleration signal. A single-chip microcomputer is provided in an electronic product such as an automobile, and the single-chip microcomputer has an input / output (IO) pin, and the IO pin can be electrically connected to the acceleration sensor 200. When the acceleration sensor 200 detects an abnormal acceleration signal, the IO pin obtains the abnormal acceleration signal and converts the IO pin level value. Afterwards, the collision may cause the voltage output by the power control module 110 to be abnormal, and the reset module 130 may obtain a reset event. The reset module 130 can determine whether the reset event is abnormal based on the voltage output by the power control module 110 obtained by the voltage monitoring module 120 and the preset filtering logic algorithm. When the reset event is normal, the electronic product such as the automobile can configure the ignition mode. Subsequently, the electronic product such as the automobile can send an ignition sequence to unlock the ignition power level, and then turn on the ignition power level. The ignition actuator will release a large current, trigger the ignition, and successfully inflate the airbag 300. In addition, electronic products such as automobiles can also determine whether there are abnormalities in other systems (such as watchdog systems, etc.), and ignition is allowed only when there are no abnormalities.

[0046] It can be seen that in this embodiment, by setting the voltage monitoring module 120 of the vehicle-mounted chip 100 to monitor the voltage output by multiple output terminals of the power control module 110 in real time, and setting the reset module 130 to determine whether a reset event occurs and whether the reset event is abnormal, it is determined whether a collision event has occurred in an electronic product such as a car. In the case of determining that a collision event has occurred in an electronic product such as a car, the power control module 110 of this embodiment can supply power to the ignition actuator circuit of the airbag 300 via the ignition actuator charging unit 111, thereby inflating the airbag 300 to ensure the safety of the driver and passengers. The electronic product provided in this embodiment improves the accuracy of judging whether the reset module 130 is abnormal by setting a preset filtering logic algorithm in the reset module 130, thereby improving the safety of electronic products such as cars.

[0047] In addition, in another possible example, the electronic product may further include a main control chip. The main control chip may be connected to the reset module 130. When the main control chip (or the microcontroller unit of the main control chip) receives a second preset instruction (for example, an abnormal acceleration signal related instruction) issued by the acceleration sensor 200, or when the main control chip receives an IO pin level value conversion signal, the main control chip may control the reset module 130 to stop resetting. The power control module 110 in this example may directly supply power to the ignition actuator circuit of the airbag 300 via the ignition actuator charging unit 111, thereby inflating the airbag 300 to ensure the safety of the driver and passengers.

[0048] The specific composition of the vehicle-mounted chip 100 is described below through one or more embodiments and their combination.

[0049] In one embodiment, see Figure 2 , the power control module 110 of the vehicle chip 100 may include an input terminal 112 and a boost unit 113. The input interface of the boost unit 113 is connected to the input terminal 112, and the output interface of the boost unit 113 is connected to the ignition actuator charging unit 111, thereby providing high voltage to the ignition actuator charging unit 111. For example, the ignition actuator charging unit 111 may be provided with a capacitor, and the boost unit 113 may provide high voltage to the capacitor. As an example, the boost unit 113 may include a BOOST circuit, etc.

[0050] Furthermore, the power control module 110 of the vehicle-mounted chip 100 may also include a buck unit. The buck unit may include a primary buck unit and a secondary buck unit. The buck unit may be a BUCK (buck) circuit. The power control module 110 may also include a low-cost, small-volume low-dropout linear regulator (LDO), etc., so as to power other peripheral circuits, chips, etc. In one possible example, the primary buck unit may be connected to the output end of the boost unit 113 to power the peripheral circuit. At this time, the low-dropout linear regulator may be connected between the primary buck unit and the peripheral circuit to adjust the voltage output by the primary buck unit, so that the output ripple and voltage stability of the primary buck unit are better, providing a stable voltage for the peripheral circuit, and can also better meet the multi-party requirements of the application, thereby improving the function and safety of the power control module 110. In another possible example, the primary buck unit can be connected to the output end of the boost unit 113, one end of the secondary buck unit can be connected to the primary buck unit circuit, and the other end can be connected to the multiplexer (Multiplexer, MUX), so as to realize power supply for other microcontroller units (Microcontroller Unit, MCU). Of course, the primary buck unit can also output voltage directly. In addition, the power control module 110 of the vehicle-mounted chip 100 can also directly supply power to other chips. As an example, the power control module 110 of the vehicle-mounted chip 100 can directly supply power to the chip main of the electronic product.

[0051] The voltage monitoring module 120 can be connected to multiple output terminals of the power control module 110 to obtain the voltages output by the multiple output terminals of the power control module 110. As an example, the voltage monitoring module 120 can be configured with a digital filtering logic with a configurable time length, and can also be configured with a wider voltage adaptation range, so as to effectively prevent the power control module 110 from triggering an abnormal reset due to short-term voltage fluctuations caused by external interference. Specifically, within a preset time length, if the voltage monitoring module 120 detects continuous voltage fluctuations, it is considered that a reset event has occurred. Within the preset time length, if the voltage monitoring module 120 does not detect continuous voltage fluctuations, it is considered that no reset event has occurred.

[0052] As an example, the voltage monitoring module 120 may be provided with a comparison unit, which is used to compare the voltage output by the power control module 110 with a voltage threshold and output a comparison result. The voltage threshold may include a maximum voltage value and a minimum voltage value. As an example, the comparison unit may include multiple comparators.

[0053] The power control module 110 may include at least one selection unit, the selection unit is connected to the comparison unit, and the selection unit is used to output different reference voltages (e.g., bandgap reference voltages). The reference voltage can be used as a reference voltage for the voltage monitoring module 120. The selection unit may include a multiplexer, etc. In addition, the voltage monitoring module 120 may also be connected to an alarm system of the electronic product. When the voltage monitoring module 120 obtains an abnormal voltage, the voltage monitoring module 120 may issue an alarm via the alarm system.

[0054] The reset module 130 can determine whether the reset event is normal based on the voltage output by the power control module 110 and the preset filtering logic algorithm. Specifically, when the reset module 130 determines that the reset event is normal, it indicates that the vehicle-mounted chip 100 may fail. At this time, the reset module 130 can send a reset signal. Further, the system can be reset and the power control module 110 can be stopped to supply power to the ignition actuator circuit of the airbag 300 to prevent the airbag 300 from inflating. When the reset module 130 determines that the reset event is abnormal, it indicates that a collision event may occur in electronic products such as automobiles. At this time, the reset module 130 can shield the reset enable so that the airbag 300 can be inflated normally. Specifically, the reset module 130 can configure whether to trigger the reset through an electronic fuse (EFUSE). Furthermore, the reset module 130 can also choose to trigger a local reset or a global reset, thereby improving the flexibility of the reset module 130, and can also effectively prevent the abnormal reset triggered by the abnormal operation of the watchdog system, the active shutdown of a power supply, the improper software configuration or other IO control from affecting other systems of the electronic product. Furthermore, the reset module 130 may also determine the reset level according to the level of the safety incident to improve the reliability and stability of the system.

[0055] In this embodiment, firstly, the voltage monitoring module 120 can be configured with a digital filtering logic with a configurable duration, thereby reducing the probability of abnormal reset events. Secondly, this embodiment can determine whether the reset event is normal based on the voltage output by the power control module 110 and the preset filtering logic algorithm by setting the reset module 130, thereby controlling whether the airbag 300 is inflated, thereby ensuring the safety of the driver and passengers. Moreover, this embodiment integrates and connects multiple power supplies to form a common structure so that the vehicle-mounted chip 100 can work normally.

[0056] Specifically, in this embodiment, considering that the power control module 110 is susceptible to various interferences such as electromagnetic pulses and outputs abnormal voltage for a period of time, if the voltage monitoring result is directly used as the reset source for reset, it is easy to cause the ignition to fail normally when abnormal acceleration data is detected and the ignition needs to be triggered. Therefore, this embodiment adds digital filtering logic to the output end of the voltage monitoring result, and the filtering time length can be configured through software, thereby effectively shielding the system reset phenomenon caused by abnormal voltage monitoring results.

[0057] In one embodiment, the on-board chip 100 may have a standby mode and an operating mode. As an example, the standby mode may be a sleep mode. The on-board chip 100 may control the analog IO level so that the power supply of the on-board chip 100 is in standby mode, at which time the on-board chip 100 may enter a low power consumption state. When the on-board chip 100 receives a first preset instruction, the on-board chip 100 may always be in operating mode without entering standby mode. As an example, the first preset instruction may be configured using a software algorithm, and the first preset instruction may shield relevant information of the standby mode.

[0058] In this embodiment, firstly, the vehicle-mounted chip 100 of this embodiment can have a standby mode and a working mode, which can improve the robustness of the vehicle-mounted chip 100 while realizing the functional safety of the vehicle-mounted chip 100. Secondly, this embodiment controls the vehicle-mounted chip 100 to always be in the working mode instead of entering the standby mode, thereby preventing the ignition process of the airbag 300 from failing to proceed normally.

[0059] Specifically, the power control module 110 may be provided with an internal low-dropout linear regulator (internal LDO), which may be connected to a multiplexer via a power-on reset (POR) low-dropout linear regulator (POR LDO) to output a bandgap reference voltage. For example, at this time, the internal LDO may output two bandgap reference voltages via the POR LDO, one for normal functional connection and the other for voltage monitoring and testing. At this time, the multiplexer may select one of the two bandgap reference voltages, thereby taking into account both functional safety and application convenience. In addition, the POR LDO may also be directly connected to the reset module 130 to output a power-on reset signal for the reset module 130, and the digital logic may start to operate. At the same time, the internal LDO may also provide digital / analog main power supply for other circuits or chips.

[0060] In one embodiment, the vehicle-mounted chip 100 includes safety monitoring modules such as a temperature monitoring module 140 and an interaction monitoring module 150 .

[0061] The temperature monitoring module 140 may be connected to the reset module 130, and the reset module 130 is used to determine whether the temperature output by the temperature monitoring module 140 is abnormal. In the case where the temperature output by the temperature monitoring module 140 is abnormal, the reset module 130 may be reset. As an example, the temperature monitoring module 140 may include a temperature sensor, etc.

[0062] The interaction monitoring module 150 may be connected to the reset module 130, and the reset module 130 is used to determine whether the interaction result output by the interaction monitoring module 150 is abnormal. In the case of the interaction result output by the interaction monitoring module 150, the reset module 130 may be reset to prevent abnormalities in the interaction between other chips and the vehicle-mounted chip 100. As an example, the interaction monitoring module 150 may include a watchdog system, etc.

[0063] Of course, the vehicle chip 100 may also include other safety monitoring modules. For example, the vehicle chip 100 may also include a speed monitoring module, a humidity monitoring module, etc. In addition, the reset module 130 may also be configured with a digital filtering logic with a configurable duration to further determine whether the reset event is normal.

[0064] This embodiment connects the reset module 130 with the temperature monitoring module 140, the interaction monitoring module 150 and other modules, thereby improving the control authority of the reset module 130 over the vehicle-mounted chip 100 or the electronic product. Moreover, the reset module 130 can also determine whether the reset event is normal based on multiple parameters such as temperature, interaction system, voltage, etc., thereby improving the accuracy of the reset event judgment.

[0065] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that "this embodiment" or "one embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present disclosure. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification may not necessarily refer to the same embodiment.

[0066] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features of the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all fall within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the attached claims. The above description is only a preferred implementation method of the present disclosure, and does not limit the scope of the patent of the present disclosure. All equivalent structural transformations made by using the contents of the present disclosure specification and drawings under the inventive concept of the present disclosure, or direct / indirect application in other related technical fields are included in the scope of protection of the patent of the present disclosure.

Claims

1. A vehicle-mounted chip, characterized in that: include: A power control module, comprising at least an ignition actuator charging unit of the safety airbag, wherein when the ignition actuator charging unit is triggered, the power control module supplies power to the ignition actuator circuit of the safety airbag via the ignition actuator charging unit; A voltage monitoring module, connected to the power control module, and used to monitor the voltage output by the power control module to determine whether a reset event occurs; A reset module is connected to the voltage monitoring module. When the reset event occurs, the reset module is used to determine whether the reset event is normal based on the voltage output by the power control module and a preset filtering logic algorithm.

2. The vehicle-mounted chip according to claim 1, characterized in that: When the reset module determines that the reset event is normal, a system reset signal is sent to stop the power control module from supplying power to the ignition actuator circuit of the airbag.

3. The vehicle-mounted chip according to claim 1, characterized in that: When the reset module determines that the reset event is abnormal, the reset enable is shielded.

4. The vehicle-mounted chip according to claim 1, characterized in that: The voltage monitoring module includes a comparison unit, which is used to compare the voltage output by the power control module with a voltage threshold and output a comparison result.

5. The vehicle-mounted chip according to claim 4, characterized in that: The power control module includes at least one selection unit, the selection unit is connected to the comparison unit, and the selection unit is used to output different reference voltages.

6. The vehicle-mounted chip according to claim 1, characterized in that: The power control module comprises: Input terminal, used to connect to the power supply; A boost unit, wherein an input interface of the boost unit is connected to the input end, and an output interface of the boost unit is connected to the ignition actuator charging unit.

7. The vehicle-mounted chip according to claim 1, characterized in that: The on-board chip has a standby mode and an operating mode, and when the on-board chip receives a first preset instruction, the on-board chip is in the operating mode.

8. The vehicle-mounted chip according to claim 1, characterized in that: The vehicle-mounted chip comprises: A temperature monitoring module, connected to the reset module, and used to determine whether the temperature output by the temperature monitoring module is abnormal; and / or, The interaction monitoring module is connected to the reset module, and the reset module is used to determine whether the interaction result output by the interaction monitoring module is abnormal.

9. An electronic product, characterized in that: include: Accelerometer; The vehicle-mounted chip according to any one of claims 1 to 8, wherein the vehicle-mounted chip is used to receive a signal sent by the acceleration sensor, and determine whether to trigger an ignition actuator charging unit of the airbag based on the signal sent by the acceleration sensor; The safety airbag comprises an ignition actuator circuit, wherein the ignition actuator circuit is electrically connected to an ignition actuator charging unit of the safety airbag.

10. The electronic product according to claim 9, characterized in that: The electronic product also includes: The main control chip is connected to the reset module, and when receiving a second preset instruction sent by the acceleration sensor, the main control chip controls the reset module to stop resetting.

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