CN109491288B - Control chip, electronic equipment and anti-interference method - Google Patents
Control chip, electronic equipment and anti-interference method Download PDFInfo
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- CN109491288B CN109491288B CN201811354924.6A CN201811354924A CN109491288B CN 109491288 B CN109491288 B CN 109491288B CN 201811354924 A CN201811354924 A CN 201811354924A CN 109491288 B CN109491288 B CN 109491288B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
Abstract
The application discloses control chip, electronic equipment and anti-interference method, this control chip includes: the suppression circuit is connected with the switch and the transistor and comprises a plurality of circuits, and each circuit in the plurality of circuits has different resistance values; the digital register is used for storing an operand and controlling the switch to be connected with a circuit corresponding to the operand; the switch is connected between the digital register and the suppression circuit and is used for being connected with one circuit of the multi-circuit; and the controller is connected with the digital register and the measuring instrument and used for controlling the digital register to adjust the operand according to the output parameter of a control chip of the measuring instrument, so that the amplitude of the electric fast transient pulse group of the control chip is filtered by a low-pass filter consisting of a circuit connected with the switch and a parasitic capacitor of the transistor. The technical problem of lower debugging flexibility of the control chip in the prior art is solved.
Description
Technical Field
The present application relates to the field of chip technologies, and in particular, to a control chip, an electronic device, and an anti-interference method.
Background
Control chips are widely used in various electronic devices for controlling and coordinating operations of various components in the electronic devices, such as air conditioners, refrigerators, washing machines, and the like. When a switch contact in the electronic equipment is disconnected with an inductive load, transient disturbance is generated at the switch contact due to insulation breakdown or bounce of a gap of the switch contact and the like, and an electric fast transient pulse group is generated in the process of repeatedly opening and closing the inductive load for many times, wherein the electric fast transient pulse group can cause electromagnetic interference to a control chip, so that the control chip cannot work or generate a misoperation instruction.
In order to improve the anti-interference performance of the control chip, at present, anti-interference components are mainly added in a peripheral circuit of the control chip or wiring of a circuit in a PCB is modified, namely, the PCB is modified.
Disclosure of Invention
The application provides a control chip, an electronic device and an anti-interference method, which are used for solving the technical problem that the debugging flexibility of the control chip is low in the prior art.
In a first aspect, the present application provides a control chip, comprising:
the suppression circuit is connected with the switch and the transistor and comprises a plurality of circuits, and each circuit in the plurality of circuits has different resistance values;
the digital register is used for storing an operand and controlling the switch to be connected with a circuit corresponding to the operand, wherein a preset mapping relation exists between the operand and the resistance values of the multipath circuit;
the switch is connected between the digital register and the suppression circuit and is used for being connected with one circuit of the multi-circuit;
and the controller is connected with the digital register and the measuring instrument and used for controlling the digital register to adjust the operand according to the output parameter of a control chip of the measuring instrument, so that the low-pass filter consisting of a circuit connected with the switch and a parasitic capacitor of the transistor filters the electric fast transient pulse group of the control chip.
According to the scheme provided by the embodiment of the application, the controller is connected with the digital register and the measuring instrument, the digital register is controlled to adjust the operand according to the output parameter of the control chip measured by the measuring instrument, and the switch is controlled to switch between circuits with different resistance values by adjusting the operand, so that the parasitic capacitance of the transistor is matched with the circuit with proper resistance value, and the low-pass filter pair formed by the circuit connected with the switch and the parasitic capacitance of the transistor can effectively filter the electric fast transient pulse group of the control chip.
Optionally, the switch is connected to an input terminal of the control chip.
Optionally, the multi-path circuit is a 4-path circuit or an 8-path circuit.
Optionally, the resistance value of one circuit in the 4-way circuit or the 8-way circuit is zero.
Optionally, the operand is a two-bit binary number or a three-bit binary number.
In a second aspect, the present application provides an electronic device, which includes the control chip of the first aspect.
In a third aspect, the present application provides a method of immunity, the method comprising:
when the switch is connected with a first circuit in the suppression circuit, determining whether an output parameter of a control chip measured by a measuring instrument under a target voltage meets a preset condition, wherein the target voltage is the highest voltage born by the control chip, and the output parameter comprises the working state of the control chip, the output voltage and electric fast transient pulse group interference;
if not, controlling a digital register to adjust an operand, and controlling the switch to be switched and connected from the first circuit to a second circuit corresponding to the adjusted operand through the operand;
and determining whether the output parameter of the control chip under the target voltage meets a preset condition or not based on the second circuit, and if so, stopping controlling the digital register to adjust the operand.
In the scheme provided by the embodiment of the application, the controller controls the digital register to adjust the operand by determining that the output parameter of the control chip does not meet the preset condition under the target voltage, and the digital register is controlled to adjust the operand until the output parameter of the control chip under the target voltage meets the preset condition through the operand control switch and the circuit corresponding to the operand. Therefore, the controller adjusts the circuit connected with the switch by controlling the digital register to adjust the operand, thereby not only reducing the workload of manual adjustment, but also improving the flexibility of debugging.
Optionally, the preset condition includes:
the number of times of restarting or resetting operations of the control chip in a preset time period is not more than a first threshold value;
the voltage output by the control chip is greater than a second threshold value; or
The amplitude of the electrical fast transient pulse burst is less than a third threshold.
Optionally, before determining whether the output parameter of the control chip measured by the measuring instrument at the target voltage meets a preset condition, the method further includes:
determining whether the output parameters of the control chip meet preset conditions under a default voltage, wherein the default voltage is the lowest voltage borne by the control chip;
if not, determining whether the output parameter of the control chip measured by the measuring instrument under the target voltage meets a preset condition.
In the scheme provided by the embodiment of the application, when the controller determines that the output parameter of the control chip under the default voltage does not meet the preset condition, whether the output parameter of the control chip under the measurement target voltage meets the preset condition or not is determined, the situation that the interference of the control chip electric fast transient pulse group is determined to be minimum through testing different voltage values is avoided, and the testing efficiency of the control chip is improved.
Optionally, controlling the digital register to adjust the operand comprises:
adjusting the count value of a counter in a digital register according to the measurement result of the measuring instrument;
and adjusting the operand in the digital register based on the mapping relation between the counting value and the operand.
Drawings
Fig. 1 is a schematic structural diagram of a control chip according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a method for interference immunity according to an embodiment of the present disclosure.
Detailed Description
In the solutions provided in the embodiments of the present application, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work according to the embodiments of the present application are within the scope of the present application.
In order to better understand the technical solutions, the technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
Fig. 1 is a schematic structural diagram of a control chip provided in the present application, where the control chip includes:
the suppression circuit 1 is connected with the switch 2 and the transistor 3 and comprises a plurality of circuits, and each circuit in the plurality of circuits has different resistance values;
the digital register 4 is used for storing an operand and controlling the switch 2 to be connected with a circuit corresponding to the operand, wherein a preset mapping relation exists between the operand and the resistance value of the multi-path circuit;
the switch 2 is connected between the digital register 4 and the suppression circuit 1 and is used for being connected with one circuit of the multi-circuit;
and the controller 5 is connected with the digital register 4 and the measuring instrument and is used for controlling the digital register 4 to adjust the operand according to the output parameter of a control chip of the measuring instrument, so that the amplitude of an electric fast transient pulse group of the control chip is filtered by a low-pass filter formed by a circuit connected with the switch 2 and a parasitic capacitor of the transistor 3.
Specifically, the Transistor in the control chip may be a Metal-Oxide-semiconductor field-Effect Transistor (MOS) or a Bipolar Junction Transistor (BJT), without limitation, an external circuit of the control chip is connected to a driving circuit inside the control chip through an input port 6 and an output port 7, and the output port 7 provides energy to the Transistor through the driving circuit, so that the driving circuit drives the Transistor to oscillate, but the driving circuit does not have driving capability at the input port 6, and cannot discharge the energy at the input port 6 of the control chip, so that the input port 6 of the control chip is relatively sensitive and is susceptible to interference, therefore, in the solution provided in this embodiment of the application, the switch 2 may be connected to the input port 6 of the control chip, that is, an anti-interference circuit composed of the switch 2 and the suppression circuit 1 is added to the input port 6 of the control chip, to improve the noise immunity of the input 6 of the control chip.
The suppression circuit 1 includes N circuits with different resistance values, where N is a positive integer not less than 2, and is preferably a 4-way or 8-way circuit in this embodiment, and in order to determine whether interference of an electric fast pulse group of a control chip is greater than a preset threshold value when the control chip is in no-load, the resistance value of one circuit existing in the 4-way or 8-way circuit is zero.
Further, the controller 5 adjusts the circuits connected to the switch 2 by adjusting the operand of the digital register 4, so that the switch 2 switches between the plurality of circuits under the control of the operand, wherein the control number is composed of most binary numbers, preferably two-bit binary numbers or three-bit binary numbers in this application.
According to the scheme provided by the embodiment of the application, the controller is connected with the digital register 4 and the measuring instrument, the digital register 4 is controlled to adjust the operand according to the output parameter of the control chip measured by the measuring instrument, and the switch 2 is controlled to switch between circuits with different resistance values by adjusting the operand, so that the low-pass filter formed by the circuit connected with the switch 2 and the parasitic capacitor of the transistor 3 filters the amplitude of the electric fast transient pulse group of the control chip.
The application also provides an electronic device, which comprises the control chip.
Specifically, the electronic device may be an electrical device such as an air conditioner, a refrigerator, a washing machine, or a communication device such as a mobile phone, a computer, or a tablet, and all devices including the control chip are all in accordance with the electronic device described in the present application, which is not limited herein.
Based on the control chip shown in fig. 1, the present application provides an anti-interference method, which is described in further detail below with reference to the drawings of the specification, and a specific implementation manner of the method may include the following steps (a method flow is shown in fig. 2):
step 201, when a switch is connected with a first circuit in a suppression circuit, a controller determines whether an output parameter of a control chip measured by a measuring instrument under a target voltage meets a preset condition, wherein the target voltage is the highest voltage born by the control chip, and the output parameter comprises the working state of the control chip, the output voltage and electric fast transient pulse group interference.
Specifically, the preset conditions include: the number of times of restarting or resetting operations of the control chip in a preset time period is not more than a first threshold value; the voltage output by the control chip is greater than a second threshold value; or the electrical fast transient burst interference is less than a third threshold.
The controller is connected with the measuring instrument outside the control chip, when the switch is connected with the first circuit in the suppression circuit, wherein, the first circuit can be a circuit with zero resistance value or a circuit with non-zero resistance value, the target voltage is input to the control chip through the input port, wherein the target voltage is the highest voltage that the control chip can bear, for example, the target voltage is 4000V, under the target voltage, the measuring instrument measures parameters such as the working state of the control chip, the output voltage, the electric fast transient pulse group interference and the like, the controller judges whether the number of times of restarting or resetting operation of the control chip in preset time is greater than a first threshold value or not based on the result measured by the measuring instrument, and if the number of times of restarting or resetting operation of the control chip in preset time is not greater than the first threshold value, whether the amplitude of the output voltage of the control chip is greater than a second threshold value or not is determined; or the controller determines whether the electrical fast transient burst interference in the output profile is greater than a third threshold based on the output profile measured by the measurement instrument.
And 202, if the operand is not satisfied, the controller controls the digital register to adjust the operand, and controls the switch to be switched and connected from the first circuit to a second circuit corresponding to the adjusted operand through the operand.
When the switch is connected to the first circuit in the suppression circuit, the controller determines, based on the measurement result of the measurement instrument, that the output parameter of the control chip measured by the measurement instrument at the target voltage does not satisfy the preset condition, and there may be cases as follows:
in case 1, the controller determines that the number of times of the restart or reset operation of the control chip within the preset time is greater than a first threshold.
And 2, when the controller determines that the number of times of restarting or resetting operations of the control chip in the preset time is not more than the first threshold, determining that the amplitude of the output voltage in the output voltage waveform is less than a second threshold.
In the above situation, the controller sends an adjustment instruction to the digital register, and after the digital register receives the adjustment instruction, the controller adjusts a count value of a counter in the digital register, and adjusts an operand in the digital register based on a mapping relationship between the count value and the operand, specifically:
the digital register is provided with a counter, the counting range of the counter is fixed, and each value of the counter corresponds to an operand of the digital register one by one, for example, the operands of the digital register comprise 00, 01, 10 and 11, the counting range of the counter is 0-3, wherein the counting value 0 corresponds to the operand 00, the counting value 1 corresponds to the operand 01, the counting value 2 corresponds to the operand 10, and the counting value 3 corresponds to the operand 11; when the counting value receives the adjusting instruction, the counter is added by one on the basis of the current counting value, and if the counting value reaches the maximum value, the adjusting instruction is received, and the counter is cleared.
After the digital register receives the adjustment instruction, the counter adds one to the current count value, determines the count value of the counter, and adjusts the controller to the operand corresponding to the count value based on the one-to-one correspondence between the count value and the operand, where the operand and a multi-path circuit in the suppression circuit have a preset mapping relationship, for example: the suppression circuit comprises 4 circuits, the resistance values of the 4 circuits are respectively 0 omega, 470 omega, 1K omega or 4.7K omega, a circuit with an operand 00 corresponding to 4.7K omega, a circuit with an operand 01 corresponding to 1K omega, a circuit with an operand 10 corresponding to 470 omega and a circuit with an operand 11 corresponding to 0 omega is arranged, and therefore the controller controls the switch to be switched from the first circuit to be connected to the second circuit corresponding to the adjusted operand through the operand.
And step 203, the controller determines whether the output parameter of the control chip under the target voltage meets a preset condition or not based on the second circuit, and stops controlling the digital register to adjust the operand if the output parameter meets the preset condition.
Under the condition that the switch is connected with the second circuit, the controller determines whether the output parameter of the control chip meets a preset condition under a target voltage based on the measured output parameter of the control chip of the measuring instrument, if the number of times of restarting or resetting operation of the control chip in a preset time is not more than a first threshold value, and the amplitude of the output voltage of the control chip is more than a second threshold value; or the amplitude of the electric fast transient pulse group in the output oscillogram measured by the measuring instrument is less than a third threshold value, the controller stops controlling the digital register to adjust the operand.
In the scheme provided by the embodiment of the application, the controller controls the digital register to adjust the operand by determining that the output parameter of the control chip does not meet the preset condition under the target voltage, and the digital register is controlled to adjust the operand until the output parameter of the control chip under the target voltage meets the preset condition through the operand control switch and the circuit corresponding to the operand. Therefore, the controller adjusts the circuit connected with the switch by controlling the digital register to adjust the operand, thereby not only reducing the workload of manual adjustment, but also improving the flexibility of debugging.
For example, the suppression circuit in the control chip is a 4-way circuit, and the corresponding resistance values are 0 Ω, 500 Ω, 1K Ω and 6K Ω respectively; the operand of the digital register is a two-bit binary number, and the corresponding operands are 00, 01, 10 and 11; the counting range of the counter is 0-3; the counter value 0 of the counter corresponds to the operand 00, the circuit with the resistance value of 0 omega corresponding to the operand 00, the counter value 1 of the counter corresponds to the operand 01, the circuit with the resistance value of 1K omega corresponding to the operand 01, the counter value 2 of the counter corresponds to the operand 10, the circuit with the resistance value of 500 omega corresponding to the operand 10, the counter value 3 of the counter corresponds to the operand 11, and the circuit with the resistance value of 6K omega corresponding to the operand 11; the target voltage of the control chip is 4000V; the first threshold is 2 times; the second threshold is 3500V.
When the switch is connected to a circuit having a resistance of 0 Ω, the count value of the corresponding counter is 0, and the operand of the digital register is 00. The test instrument detects that the number of times of restarting or resetting operation of the control chip in a preset time period is 0, the amplitude of output voltage is 3000V, the interference intensity of an electric fast transient pulse group is large, when the controller determines that a switch is connected with a circuit of 0 omega, a first output parameter of the control chip does not meet a preset condition under a target voltage, the count value of a counter is adjusted to 1, the operand of a digital register is controlled to be 01, the switch is switched to the circuit corresponding to the circuit with the resistance value of 1K omega based on the operand, then the measurement instrument measures a second output parameter of the current control chip, if the current second output parameter of the control chip meets the preset condition, the controller stops controlling the digital register to adjust the operand, if the current second output parameter of the control chip does not meet the preset condition, the value of the counter is adjusted to 2, and the operand of the digital register is controlled to 10, and switching the switch to a circuit corresponding to the resistance value of 500 omega based on the operand, measuring a third output parameter of the current control chip by a measuring instrument, stopping controlling the digital register to adjust the operand if the current third output parameter of the control chip meets a preset condition, otherwise, adjusting the value of the counter to 3, controlling the operand of the digital register to 11, and switching the switch to a circuit corresponding to the resistance value of 6K omega based on the operand.
Further, before determining whether the output parameter of the control chip measured by the measuring instrument at the target voltage meets a preset condition, the method further comprises:
determining whether the output parameters of the control chip meet preset conditions under a default voltage, wherein the default voltage is the lowest voltage borne by the control chip;
if not, determining whether the output parameter of the control chip measured by the measuring instrument under the target voltage meets a preset condition.
In the scheme provided by the embodiment of the application, when the controller determines that the output parameter of the control chip under the default voltage does not meet the preset condition, whether the output parameter of the control chip under the measurement target voltage meets the preset condition or not is determined, the situation that the interference of the electric fast transient pulse group of the control chip is minimum is avoided by testing different voltage values, and the test efficiency of the control chip is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A control chip, comprising:
the suppression circuit is connected with the switch and the transistor and comprises a plurality of circuits, and each circuit in the plurality of circuits has different resistance values;
the digital register is used for storing an operand and controlling the switch to be connected with a circuit corresponding to the operand, wherein a preset mapping relation exists between the operand and the resistance values of the multipath circuit;
the switch is connected between the digital register and the suppression circuit and is used for being connected with one circuit of the multi-circuit;
and the controller is connected with the digital register and the measuring instrument and is used for controlling the digital register to adjust the operand when an output parameter of the control chip measured by the measuring instrument under a target voltage does not meet a preset condition, so that a low-pass filter consisting of a circuit connected with the switch and a parasitic capacitor of the transistor filters an electric fast transient pulse group of the control chip, wherein the target voltage refers to the highest voltage born by the control chip, and the output parameter comprises the working state of the control chip, the output voltage and electric fast transient pulse group interference.
2. The control chip of claim 1, wherein the switch is connected to an input of the control chip.
3. The control chip of claim 2, wherein the multiplexing circuit is a 4-way circuit or an 8-way circuit.
4. The control chip of claim 3, wherein the resistance of one circuit in the 4-way circuit or the 8-way circuit is zero.
5. The control chip of claim 4, wherein the operand is a two-bit binary number or a three-bit binary number.
6. An electronic device, characterized in that it comprises a control chip according to any one of claims 1 to 5.
7. A method for noise immunity, applied to the control chip according to any one of claims 1 to 5, comprising:
when the switch is connected with a first circuit in the suppression circuit, determining whether an output parameter of a control chip measured by a measuring instrument under a target voltage meets a preset condition, wherein the target voltage is the highest voltage born by the control chip, and the output parameter comprises the working state of the control chip, the output voltage and electric fast transient pulse group interference;
if not, controlling a digital register to adjust an operand, and controlling the switch to be switched and connected from the first circuit to a second circuit corresponding to the adjusted operand through the operand;
and determining whether the output parameter of the control chip under the target voltage meets a preset condition or not based on the second circuit, and if so, stopping controlling the digital register to adjust the operand.
8. The method of claim 7, wherein the preset conditions include:
the number of times of restarting or resetting operations of the control chip in a preset time period is not more than a first threshold value;
the voltage output by the control chip is greater than a second threshold value; or
The amplitude of the electrical fast transient pulse burst is less than a third threshold.
9. The method of any one of claims 7 to 8, wherein before determining whether the output parameter of the control chip measured by the measuring instrument at the target voltage satisfies a preset condition, further comprising:
determining whether the output parameters of the control chip meet preset conditions under a default voltage, wherein the default voltage is the lowest voltage borne by the control chip;
if not, determining whether the output parameter of the control chip measured by the measuring instrument under the target voltage meets a preset condition.
10. The method of claim 9, wherein controlling the digital register to adjust the operand comprises:
adjusting the count value of a counter in a digital register according to the measurement result of the measuring instrument;
and adjusting the operand in the digital register based on the mapping relation between the counting value and the operand.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811354924.6A CN109491288B (en) | 2018-11-14 | 2018-11-14 | Control chip, electronic equipment and anti-interference method |
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| CN201811354924.6A CN109491288B (en) | 2018-11-14 | 2018-11-14 | Control chip, electronic equipment and anti-interference method |
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| CN101452414A (en) * | 2007-12-06 | 2009-06-10 | 鸿富锦精密工业（深圳）有限公司 | Mainboard fan interface test system and method |
| CN105576671A (en) * | 2016-03-04 | 2016-05-11 | 国网黑龙江省电力有限公司哈尔滨供电公司 | Reactive compensation device and reactive compensation method based on modular multilevel converter |
| CN106452387A (en) * | 2016-08-31 | 2017-02-22 | 安徽赛福电子有限公司 | Configurable multi-mode filter based on switched capacitor |
| CN106571841A (en) * | 2016-10-28 | 2017-04-19 | 宇龙计算机通信科技(深圳)有限公司 | Radio frequency matching system and method of realizing radio frequency matching automation |
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