Port crosstalk detection circuit, port crosstalk detection method and integrated circuit chip

Abstract

The embodiment of the invention provides a port crosstalk detection circuit, a port crosstalk detection method and an integrated circuit chip. The port crosstalk detection circuit comprises a current source module, a voltage generation module, a voltage acquisition module and a control module, and the current source module inputs a predetermined current to the voltage generation module from a port; the voltage generation module generates a voltage signal at the port based on the predetermined current; the voltage acquisition module samples a voltage signal of the port to obtain a sampling voltage value; the control module is used for controlling the current source module of the first port in the N ports to input a preset current to the voltage generation module of the first port so as to generate a voltage signal at the first port; controlling a voltage acquisition module to sample voltage signals of second ports except the first port to obtain a sampling voltage value corresponding to each second port; and determining whether each second port is subjected to crosstalk of the first port or not according to a comparison result of the sampling voltage value corresponding to each second port and a voltage threshold value.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology, and in particular to a port crosstalk detection circuit, a port crosstalk detection method and an integrated circuit chip. Background Art

[0002] An analog input and output (AIO) port is usually present in an electronic control unit (ECU) such as an airbag ignition controller. The AIO port is used to input analog signals and / or output analog signals.

[0003] For the purpose of member safety, electronic control units such as airbag ignition controllers have high safety requirements for AIO ports, and crosstalk between AIO ports will affect the safety of airbag ignition controllers. Therefore, how to determine whether there is crosstalk between AIO ports and improve the safety of airbag ignition controllers is a problem faced. Summary of the invention

[0004] The embodiments of the present disclosure provide a port crosstalk detection circuit, a port crosstalk detection method and an integrated circuit chip.

[0005] According to a first aspect of an embodiment of the present disclosure, a port crosstalk detection circuit is proposed. The port crosstalk detection circuit is applied to N ports. The port crosstalk detection circuit includes: a current source module corresponding to each port, a voltage generation module corresponding to each port, a voltage acquisition module, and a control module, wherein the current source module is used to input a predetermined current from the port corresponding to the current source module to the voltage generation module; the voltage generation module is used to generate a voltage signal at the port corresponding to the voltage generation module based on the predetermined current; the voltage acquisition module is used to sample the voltage signal of the port to obtain a sampled voltage value; N is an integer greater than or equal to 2; The control module is used for: Controlling a current source module of a first port among the N ports to input a predetermined current into a voltage generation module of the first port, so as to generate a voltage signal at the first port; Controlling the voltage acquisition module to sample voltage signals of second ports other than the first port among the N ports to obtain a sampled voltage value corresponding to each of the second ports; According to the comparison result of the sampled voltage value corresponding to each second port and the voltage threshold, it is determined whether each second port is affected by the crosstalk of the first port.

[0006] In some embodiments, the current source module includes: a current source and a first switch; The control module is used to control the first switch to be turned on or off, so as to respectively turn on or off the predetermined current input by the current source to the corresponding port.

[0007] In some embodiments, the voltage generating module includes: a first resistor and a second resistor; the first end of the first resistor is connected to the port, the second end of the first resistor is connected to the first end of the second resistor as a sampling node of the voltage acquisition module, the second end of the second resistor is connected to a reference voltage signal, the predetermined current flows from the first resistor through the second resistor to the reference voltage signal, and the voltage signal is generated at the first end of the first resistor.

[0008] In some embodiments, the voltage acquisition module includes a digital-to-analog converter, and the voltage acquisition module is specifically used to sample the voltage division signal of the voltage signal on the sampling node to obtain the sampled voltage value; or, The voltage acquisition module includes a voltage comparator, and the voltage acquisition module is specifically used to compare the sampled voltage value of the voltage division signal with the voltage threshold to generate the comparison result.

[0009] In some embodiments, the port crosstalk detection circuit further includes: a second switch between the sampling node and the voltage acquisition module; The control module is used to control the on or off of the second switch to respectively turn on and off the reference voltage signal output to the voltage acquisition module.

[0010] In some embodiments, the control module is used to: Controlling the current source module to stop inputting a predetermined current to the corresponding port; Controlling the voltage acquisition module to determine a sampled voltage value of the port voltage signal when the port does not have the predetermined current; It is determined whether the port is short-circuited based on the sampled voltage value.

[0011] According to a second aspect of an embodiment of the present disclosure, a port crosstalk detection method is proposed. The method is applied to a port crosstalk detection circuit. The port crosstalk detection circuit is applied to N ports. The port crosstalk detection circuit includes: a current source module corresponding to each port, a voltage generation module corresponding to each port, and a voltage acquisition module, wherein the current source module is used to input a predetermined current from the port corresponding to the current source module to the voltage generation module; the voltage generation module is used to generate a voltage signal at the port corresponding to the voltage generation module based on the predetermined current; the voltage acquisition module is used to sample the voltage signal of the port to obtain a sampled voltage value; N is an integer greater than or equal to 2; The method comprises: Controlling a current source module of a first port among the N ports to input a predetermined current into a voltage generation module of the first port, so as to generate a voltage signal at the first port; Controlling the voltage acquisition module to sample voltage signals of second ports other than the first port among the N ports to obtain a sampled voltage value corresponding to each of the second ports; According to the comparison result of the sampled voltage value corresponding to each second port and the voltage threshold, it is determined whether each second port is affected by the crosstalk of the first port.

[0012] In some embodiments, the current source module includes: a current source and a first switch; The method further includes: controlling the first switch to be turned on or off, so as to respectively turn on or off the predetermined current input by the current source to the corresponding port.

[0013] In some embodiments, the voltage generating module includes: a first resistor and a second resistor; the first end of the first resistor is connected to the port, the second end of the first resistor is connected to the first end of the second resistor as a sampling node of the voltage acquisition module, the second end of the second resistor is connected to a reference voltage signal, the predetermined current flows from the first resistor through the second resistor to the reference voltage signal, and the voltage signal is generated at the first end of the first resistor.

[0014] In some embodiments, the voltage acquisition module includes a digital-to-analog converter, and the voltage acquisition module is specifically used to sample the voltage division signal of the voltage signal on the sampling node to obtain the sampled voltage value; or, The voltage acquisition module includes a voltage comparator, and the voltage acquisition module is specifically used to compare the sampled voltage value of the voltage division signal with the voltage threshold to generate the comparison result.

[0015] In some embodiments, the port crosstalk detection circuit further includes: a second switch between the sampling node and the voltage acquisition module; The method further includes: controlling the second switch to be turned on or off, so as to respectively turn on and off the reference voltage signal output to the voltage acquisition module.

[0016] In some embodiments, the method further comprises: Controlling the current source module to stop inputting a predetermined current to the corresponding port; Controlling the voltage acquisition module to determine a sampled voltage value of the port voltage signal when the port does not have the predetermined current; It is determined whether the port is short-circuited based on the sampled voltage value.

[0017] According to a third aspect of an embodiment of the present disclosure, an integrated circuit chip is provided. The integrated circuit chip includes N ports and the port crosstalk detection circuit described in the first aspect.

[0018] According to a fourth aspect of an embodiment of the present disclosure, an electrical device is provided, the electrical device comprising: The port crosstalk detection circuit according to the first aspect; or The integrated circuit chip described in the second aspect.

[0019] According to a fifth aspect of an embodiment of the present disclosure, a storage medium is provided, on which an executable program is stored. When the executable program is executed by a processor, the steps of the port crosstalk detection method described in the third aspect are implemented.

[0020] According to the embodiment of the present disclosure, a port crosstalk detection circuit, a port crosstalk detection method and an integrated circuit chip are disclosed. The port crosstalk detection circuit is applied to N ports, and the port crosstalk detection circuit includes: a current source module corresponding to each port, a voltage generation module corresponding to each port, a voltage acquisition module, and a control module, wherein the current source module is used to input a predetermined current from the port corresponding to the current source module to the voltage generation module; the voltage generation module is used to generate a voltage signal at the port corresponding to the voltage generation module based on the predetermined current; the voltage acquisition module is used to sample the voltage signal of the port to obtain a sampled voltage value; N is an integer greater than or equal to 2; the control module is used to: control the current source module of the first port of the N ports to input a predetermined current to the voltage generation module of the first port to generate a voltage signal at the first port; control the voltage acquisition module to sample the voltage signal of the second port other than the first port of the N ports to obtain the sampled voltage value corresponding to each second port; and determine whether each second port is affected by the crosstalk of the first port according to the comparison result of the sampled voltage value corresponding to each second port and the voltage threshold. In this way, by applying a predetermined current to the first port to generate a voltage signal, and measuring the voltage signal on the second port to determine whether the first port generates crosstalk to the second port, the detection of crosstalk between ports is achieved, thereby reducing the misjudgment of the port status caused by crosstalk. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a port crosstalk detection circuit structure according to an exemplary embodiment; Figure 2 is a schematic diagram of another port crosstalk detection circuit structure according to an exemplary embodiment; Figure 3 is a schematic diagram of another structure of a port crosstalk detection circuit according to an exemplary embodiment; Figure 4 is a schematic diagram of a structure of another port crosstalk detection circuit according to an exemplary embodiment; Figure 5 is a schematic diagram of a structure of another port crosstalk detection circuit according to an exemplary embodiment; Figure 6 is a schematic diagram of a structure of another port crosstalk detection circuit according to an exemplary embodiment; Figure 7 is a schematic diagram of a structure of another port crosstalk detection circuit according to an exemplary embodiment; Figure 8 is a schematic diagram of a structure of another port crosstalk detection circuit according to an exemplary embodiment; Fig. 9 The figure is a schematic diagram of steps of a port crosstalk detection method according to an exemplary embodiment. DETAILED DESCRIPTION

[0022] In order to make the technical solutions and beneficial effects of the present invention more clearly understandable, the following is a detailed description by listing specific embodiments. The drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application belongs.

[0023] The embodiments of the present disclosure are not exhaustive, but are only illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0024] In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

[0025] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0026] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun after the article may be understood as a singular expression or a plural expression.

[0027] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0028] In some embodiments, the terms “at least one”, “one or more”, “a plurality of”, “multiple”, etc. can be used interchangeably.

[0029] In some embodiments, "at least one of A and B", "A and / or B", "A in one case, B in another case", "A in one case, B in another case", etc., may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (A and B are both executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0030] In some embodiments, the recording method of "A or B" may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). When there are more branches such as A, B, C, etc., the above is also similar.

[0031] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, value or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute redundant restrictions due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields", and the "first" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the numerical value of the description object is not limited by the ordinal number, and can be one or more. Taking the "first device" as an example, the numerical value of the "device" can be one or more. In addition, the objects modified by different prefixes may be the same or different. For example, if the description object is "device", then the "first device" and the "second device" may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" may be the same information or different information, and their contents may be the same or different.

[0032] In some embodiments, “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0033] In some embodiments, terms such as “…”, “determine…”, “in the case of…”, “at the time of…”, “when…”, “if…”, “if…”, etc. can be used interchangeably.

[0034] In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

[0035] The embodiment of the present disclosure provides a port crosstalk detection circuit, which is applied to N ports, such as Figure 1As shown, the port crosstalk detection circuit includes: a current source module 110 corresponding to each port, a voltage generation module 120 corresponding to each port, a voltage acquisition module 130, and a control module 140, wherein the current source module 110 is used to input a predetermined current from the port corresponding to the current source module 110 to the voltage generation module 120; the voltage generation module 120 is used to generate a voltage signal at the port corresponding to the voltage generation module 120 based on the predetermined current; the voltage acquisition module 130 is used to sample the voltage signal of the port to obtain a sampled voltage value; N is an integer greater than or equal to 2; The control module 140 is used for: Controlling the current source module 110 of a first port among the N ports to input a predetermined current into the voltage generation module 120 of the first port, so as to generate a voltage signal at the first port; Controlling the voltage acquisition module 130 to sample voltage signals of second ports other than the first port among the N ports to obtain a sampled voltage value corresponding to each of the second ports; According to the comparison result of the sampled voltage value corresponding to each second port and the voltage threshold, it is determined whether each second port is affected by the crosstalk of the first port.

[0036] Here, the port may include an AIO port within an integrated circuit chip, etc. For example, the port may include an AIO port within an ECU.

[0037] In a possible implementation, the port crosstalk detection circuit may be applied to an integrated circuit chip such as an ECU.

[0038] In a possible implementation, the port crosstalk detection circuit can be applied to electrical devices such as airbags, etc. For example, the port crosstalk detection circuit can be applied to an ignition controller of an airbag.

[0039] In a possible implementation, the current source module 110 and the voltage generation module 120 may be located in an integrated circuit chip such as an ECU, and the voltage acquisition module 130 and the control module 140 may be located outside an integrated circuit chip such as an ECU.

[0040] In a possible implementation, the current source module 110 , the voltage generation module 120 , the voltage acquisition module 130 , and the control module 140 may all be located in an integrated circuit chip such as an ECU.

[0041] In a possible implementation, the current source module 110 , the voltage generation module 120 , and the voltage acquisition module 130 may all be located in an integrated circuit chip such as an ECU, and the control module 140 may all be located outside an integrated circuit chip such as an ECU.

[0042] In a possible implementation, each port has a corresponding current source module 110 and a voltage generation module 120 .

[0043] In a possible implementation, the control module 140 may include a circuit module with logic processing capability in an integrated circuit chip.

[0044] In a possible implementation, each port may correspond to a voltage acquisition module 130. The voltage acquisition module 130 of each port samples the voltage signal of the corresponding port respectively.

[0045] In a possible implementation, all ports may correspond to the same voltage acquisition module 130. The connection between the voltage acquisition module 130 and different ports may be switched by a switch, so that one voltage acquisition module 130 acquires voltage signals of each port.

[0046] The voltage generating module 120 can generate a voltage signal based on a predetermined current. Figure 2 As shown, the voltage generating module 120 can generate a voltage signal using a predetermined current based on Ohm's theorem. For example, the voltage generating module 120 can be a resistor with one end connected to the port and the other end connected to the reference voltage signal. When the predetermined current flows through the resistor, a voltage signal is generated at the port. The reference voltage signal can include a power ground signal.

[0047] In a possible implementation, the sampling of the port voltage signal by the voltage generation module 120 may include at least one of the following: The voltage generating module 120 directly samples the voltage signal generated by the port, that is, the sampled voltage value is the voltage value of the voltage signal generated by the port; The voltage generating module 120 samples the voltage signal generated by the port indirectly, such as sampling the voltage signal generated by the port after voltage division, that is, the sampled voltage value is not equal to the voltage value of the voltage signal generated by the port, but the voltage value of the voltage signal generated by the port can be inferred from the sampled voltage value.

[0048] Here, the control module 140 may control whether the current source module 110 of each port generates a predetermined current, and the control module 140 may select the port whose voltage signal needs to be collected by the voltage collection module 130 .

[0049] Specifically, Figure 3As shown, the control module 140 can control the current source module 110 of the first port to generate a predetermined current to generate a voltage signal at the first port. The control module 140 can control the current source module 110 of the second port not to generate a predetermined current, and at the same time control the voltage acquisition module 130 to sample the voltage signal of the second port to determine the sampled voltage value of the voltage signal on the second port. When the first port generates crosstalk to the second port, the current of the first port may be coupled (e.g., short-circuited) to the second port, and the current coupled to the second port will generate a voltage signal on the voltage generation module 120 of the second port, which can be sampled by the voltage acquisition module 130.

[0050] In a possible implementation, the control module 140 may obtain a sampled voltage value of the voltage signal on the second port from the voltage acquisition module 130 , and compare the sampled voltage value with the voltage threshold to obtain a comparison result.

[0051] In a possible implementation, the voltage acquisition module 130 may compare the sampled voltage value of the voltage signal on the second port with the voltage threshold, and send the comparison result to the control module 140 .

[0052] In a possible implementation, the voltage acquisition module 130 may determine the sampled voltage values ​​of all second ports except the first port among the N ports.

[0053] In a possible implementation, the voltage acquisition module 130 may determine a sampled voltage value of a designated second port other than the first port among the N ports. For example, the control module 140 may select the second port sampled by the voltage acquisition module 130 .

[0054] If the voltage signal on the first port crosstalks to the second port, the sampled voltage value of the second port is higher than the voltage threshold; if the voltage signal on the first port does not crosstalk to the second port, the sampled voltage value of the second port is lower than the voltage threshold. Therefore, the control module 140 can determine whether the second port is crosstalked by the first port based on the comparison result.

[0055] In a possible implementation manner, a voltage value of the voltage signal on the first port is greater than a voltage threshold.

[0056] It can be understood that each of the N ports can be polled in turn as the first port to determine whether each port generates crosstalk to other ports.

[0057] In a possible implementation, the control module 140 may store the information on whether all ports pass the crosstalk detection in a register and transmit it to an external processor for reading.

[0058] In a possible implementation, before sampling the voltage signal of the second port, the voltage acquisition module 130 may also determine the voltage value of the voltage signal of the first port to determine that the voltage value of the first port is an expected voltage, such as when the voltage value of the voltage signal of the first port is greater than a voltage threshold.

[0059] In a possible implementation, port crosstalk detection can be performed while the peripheral circuit connected to the port is disconnected, so as to reduce the influence of the peripheral circuit on the port voltage signal.

[0060] In this way, by applying a predetermined current to the first port to generate a voltage signal, and measuring the voltage signal on the second port to determine whether the first port generates crosstalk to the second port, the detection of crosstalk between ports is achieved, thereby reducing the misjudgment of the port status caused by crosstalk.

[0061] In some embodiments, Figure 4 As shown, the current source module 110 includes: a current source I1 and a first switch S1; The control module 140 is used to control the first switch S1 to be turned on or off, so as to respectively turn on or off the predetermined current input from the current source I1 to the corresponding port.

[0062] In a possible implementation, the first switch S1 may be implemented by a switch transistor, for example, an N-channel MOS transistor or a P-channel MOS transistor.

[0063] like Figure 4 As shown, a first end of the current source I1 is connected to the power supply VDD, a second end of the current source I1 is connected to a first end of the first switch S1 (N-channel MOS), and a second end of the first switch S1 (N-channel MOS) is connected to the port.

[0064] The control module 140 controls the first switch S1 to be turned on or off so as to input a predetermined current to the port or cut off the predetermined current.

[0065] Specifically, the control module 140 may turn on the first switch S1 of the first port and turn off the first switch S1 of the second port to detect whether the second port is affected by the crosstalk of the first port.

[0066] In some embodiments, Figure 5As shown, the voltage generating module 120 includes: the voltage generating module 120 includes a first resistor R1 and a second resistor R2; the first end of the first resistor R1 is connected to the port, the second end of the first resistor R1 is connected to the first end of the second resistor R2 as a sampling node of the voltage acquisition module 130, the second end of the second resistor R2 is connected to the reference voltage signal, the predetermined current flows from the first resistor R1 through the second resistor R2 to the reference voltage signal, and the voltage signal is generated at the first end of the first resistor R1.

[0067] Here, the reference voltage signal may include a power ground signal.

[0068] The voltage signal of each port generates a voltage-divided signal at the sampling node, and the voltage acquisition module 130 acquires the voltage value of the voltage-divided signal at the sampling node as the sampled voltage value. The voltage value of the port voltage signal is positively correlated with the voltage value of the voltage-divided signal (i.e., the sampled voltage value). Therefore, when the first port generates a voltage signal through the current source module 110, it can be determined whether the second port receives crosstalk through the voltage value of the voltage-divided signal of the second port.

[0069] By dividing the voltage signal of the port by the first resistor R1 and the second resistor R2, the voltage value of the voltage sampled by the voltage acquisition module 130 can be reduced, and the damage caused by the voltage value to the voltage acquisition module 130 can be reduced. A voltage acquisition module 130 with a lower withstand voltage value can be used.

[0070] In some embodiments, Figure 6 As shown, the voltage acquisition module 130 includes a digital-to-analog converter (A / D), and the voltage acquisition module 130 is specifically used to sample the voltage division signal of the voltage signal on the sampling node to obtain the sampled voltage value.

[0071] The digital-to-analog converter can perform digital-to-analog conversion on the sampled voltage-dividing signal to obtain a sampled voltage value of the voltage-dividing signal. The control module 140 can read the sampled voltage value obtained by the digital-to-analog converter for digital-to-analog conversion, and compare the sampled voltage value with the voltage threshold to obtain a comparison result, thereby determining whether the port is subject to crosstalk from other ports.

[0072] In some embodiments, Figure 7 As shown, the voltage acquisition module 130 includes a voltage comparator, and the voltage acquisition module 130 is specifically used to compare the sampled voltage value of the voltage division signal with the voltage threshold to generate the comparison result.

[0073] Here, the voltage acquisition module 130 can be a comparator, and the comparator can directly compare the voltage division signal and the voltage threshold. Here, one input end of the comparator can be connected to a voltage signal with a voltage value of the voltage threshold, and the other input end of the comparator can be connected to a comparison voltage division signal, and the control module 140 can read the comparison result from the output end of the comparator. Then the controller can determine whether the port is subject to crosstalk from other ports.

[0074] In some embodiments, Figure 8 As shown, the port crosstalk detection circuit further includes: a second switch S2 between the sampling node and the voltage acquisition module 130; The control module 140 is used to control the on or off state of the second switch S2 to respectively turn on and off the reference voltage signal output to the voltage acquisition module 130 .

[0075] In a possible implementation, the port crosstalk detection circuit may have a voltage generation module 120; the sampling node of each port is connected to the voltage acquisition module 130 through the second switch S2. The control module 140 implements voltage sampling of nodes of different ports by opening and closing the second switch S2. The sampling node may include the voltage division signal sampling point in the above embodiment, and may include the port itself.

[0076] In a possible implementation, the second switch S2 may be implemented by using a switch transistor, for example, an N-channel MOS transistor or a P-channel MOS transistor.

[0077] like Figure 8 As shown, the sampling node is connected to a first end of the second switch S2 (N-channel MOS), and a second end of the second switch S2 (N-channel MOS) is connected to the voltage acquisition module 130 .

[0078] The control module 140 controls the conduction or disconnection of the second switch S2 corresponding to each port to implement sampling of the sampling node of each port, so as to determine the sampled voltage value of each port.

[0079] In some embodiments, the control module 140 is used to: Control the current source module 110 to stop inputting a predetermined current to the corresponding port; Controlling the voltage acquisition module 130 to determine a sampled voltage value of the port voltage signal when the port does not have the predetermined current; It is determined whether the port is short-circuited based on the sampled voltage value.

[0080] Here, before performing the crosstalk detection, the control module 140 may also detect whether each port is short-circuited to the power supply.

[0081] For example, Figure 8 As shown, the first switch S1 can be disconnected to stop the current source module 110 from inputting a predetermined current to the corresponding port; when each port does not have the predetermined current, the sampled voltage value of the port voltage signal is determined (such as determining the sampled voltage value of the sampling node), and if the port sampled voltage value is greater than the short-circuit voltage threshold (such as being equal to the power supply voltage value), it is determined that the port is short-circuited.

[0082] The embodiment of the present disclosure also proposes a port crosstalk detection method, which is applied to the port crosstalk detection circuit provided by any of the above embodiments; Fig. 9 As shown, the method includes: Step 901: Control a current source module of a first port among N ports to input a predetermined current to a voltage generation module of the first port, so as to generate a voltage signal at the first port; Step 902: Control the voltage acquisition module to sample the voltage signals of the second ports other than the first port among the N ports to obtain the sampled voltage values ​​corresponding to each second port; Step 903: Determine whether each second port is affected by the crosstalk of the first port according to the comparison result between the sampled voltage value corresponding to each second port and the voltage threshold.

[0083] Here, the port crosstalk detection method can be executed by a processing module of a port crosstalk detection circuit having processing capability. Wherein, the port crosstalk detection circuit can be applied to N ports.

[0084] Here, the port may include an AIO port within an integrated circuit chip, etc. For example, the port may include an AIO port within an ECU.

[0085] In a possible implementation, the port crosstalk detection circuit may be applied to an integrated circuit chip such as an ECU.

[0086] In a possible implementation, the port crosstalk detection circuit can be applied to electrical devices such as airbags, etc. For example, the port crosstalk detection circuit can be applied to an ignition controller of an airbag.

[0087] In a possible implementation, the current source module 110 and the voltage generation module 120 may be located in an integrated circuit chip such as an ECU, and the voltage acquisition module 130 and the control module 140 may be located outside an integrated circuit chip such as an ECU.

[0088] In a possible implementation, the current source module 110 , the voltage generation module 120 , the voltage acquisition module 130 , and the control module 140 may all be located in an integrated circuit chip such as an ECU.

[0089] In a possible implementation, the current source module 110 , the voltage generation module 120 , and the voltage acquisition module 130 may all be located in an integrated circuit chip such as an ECU, and the control module 140 may all be located outside an integrated circuit chip such as an ECU.

[0090] In a possible implementation, each port has a corresponding current source module 110 and a voltage generation module 120 .

[0091] In a possible implementation, the control module 140 may include a circuit module with logic processing capability in an integrated circuit chip.

[0092] In a possible implementation, each port may correspond to a voltage acquisition module 130. The voltage acquisition module 130 of each port samples the voltage signal of the corresponding port respectively.

[0093] In a possible implementation, all ports may correspond to the same voltage acquisition module 130. The connection between the voltage acquisition module 130 and different ports may be switched by a switch, so that one voltage acquisition module 130 acquires voltage signals of each port.

[0094] The voltage generating module 120 can generate a voltage signal based on a predetermined current. Figure 2 As shown, the voltage generating module 120 can generate a voltage signal using a predetermined current based on Ohm's theorem. For example, the voltage generating module 120 can be a resistor with one end connected to the port and the other end connected to the reference voltage signal. When the predetermined current flows through the resistor, a voltage signal is generated at the port. The reference voltage signal can include a power ground signal.

[0095] In a possible implementation, the sampling of the port voltage signal by the voltage generation module 120 may include at least one of the following: The voltage generating module 120 directly samples the voltage signal generated by the port, that is, the sampled voltage value is the voltage value of the voltage signal generated by the port; The voltage generating module 120 samples the voltage signal generated by the port indirectly, such as sampling the voltage signal generated by the port after voltage division, that is, the sampled voltage value is not equal to the voltage value of the voltage signal generated by the port, but the voltage value of the voltage signal generated by the port can be inferred from the sampled voltage value.

[0096] Here, the control module 140 may control whether the current source module 110 of each port generates a predetermined current, and the control module 140 may select the port whose voltage signal needs to be collected by the voltage collection module 130 .

[0097] Specifically, Figure 3As shown, the control module 140 can control the current source module 110 of the first port to generate a predetermined current to generate a voltage signal at the first port. The control module 140 can control the current source module 110 of the second port not to generate a predetermined current, and at the same time control the voltage acquisition module 130 to sample the voltage signal of the second port to determine the sampled voltage value of the voltage signal on the second port. When the first port generates crosstalk to the second port, the current of the first port may be coupled (e.g., short-circuited) to the second port, and the current coupled to the second port will generate a voltage signal on the voltage generation module 120 of the second port, which can be sampled by the voltage acquisition module 130.

[0098] In a possible implementation, the control module 140 may obtain a sampled voltage value of the voltage signal on the second port from the voltage acquisition module 130 , and compare the sampled voltage value with the voltage threshold to obtain a comparison result.

[0099] In a possible implementation, the voltage acquisition module 130 may compare the sampled voltage value of the voltage signal on the second port with the voltage threshold, and send the comparison result to the control module 140 .

[0100] In a possible implementation, the voltage acquisition module 130 may determine the sampled voltage values ​​of all second ports except the first port among the N ports.

[0101] In a possible implementation, the voltage acquisition module 130 may determine a sampled voltage value of a designated second port other than the first port among the N ports. For example, the control module 140 may select the second port sampled by the voltage acquisition module 130 .

[0102] If the voltage signal on the first port crosstalks to the second port, the sampled voltage value of the second port is higher than the voltage threshold; if the voltage signal on the first port does not crosstalk to the second port, the sampled voltage value of the second port is lower than the voltage threshold. Therefore, the control module 140 can determine whether the second port is crosstalked by the first port based on the comparison result.

[0103] In a possible implementation manner, a voltage value of the voltage signal on the first port is greater than a voltage threshold.

[0104] It can be understood that each of the N ports can be polled in turn as the first port to determine whether each port generates crosstalk to other ports.

[0105] In a possible implementation, the control module 140 may store the information on whether all ports pass the crosstalk detection in a register and transmit it to an external processor for reading.

[0106] In a possible implementation, before sampling the voltage signal of the second port, the voltage acquisition module 130 may also determine the voltage value of the voltage signal of the first port to determine that the voltage value of the first port is an expected voltage, such as when the voltage value of the voltage signal of the first port is greater than a voltage threshold.

[0107] In a possible implementation, port crosstalk detection can be performed while the peripheral circuit connected to the port is disconnected, so that the influence of the peripheral circuit on the port voltage signal can be reduced.

[0108] In this way, by applying a predetermined current to the first port to generate a voltage signal, and measuring the voltage signal on the second port to determine whether the first port generates crosstalk to the second port, the detection of crosstalk between ports is achieved, thereby reducing the misjudgment of the port status caused by crosstalk.

[0109] In some embodiments, Figure 4 As shown, the current source module 110 includes: a current source I1 and a first switch S1; The method further includes: controlling the first switch S1 to be turned on or off, so as to respectively turn on or off the predetermined current input by the current source I1 to the corresponding port.

[0110] like Figure 4 As shown, a first end of the current source I1 is connected to the power supply VDD, a second end of the current source I1 is connected to a first end of the first switch S1 (N-channel MOS), and a second end of the first switch S1 (N-channel MOS) is connected to the port.

[0111] The control module 140 controls the first switch S1 to be turned on or off so as to input a predetermined current to the port or cut off the predetermined current.

[0112] Specifically, the control module 140 may turn on the first switch S1 of the first port and turn off the first switch S1 of the second port to detect whether the second port is affected by the crosstalk of the first port.

[0113] In some embodiments, Figure 5 As shown, the voltage generating module 120 includes: the voltage generating module 120 includes a first resistor R1 and a second resistor R2; the first end of the first resistor R1 is connected to the port, the second end of the first resistor R1 is connected to the first end of the second resistor R2 as a sampling node of the voltage acquisition module 130, the second end of the second resistor R2 is connected to the reference voltage signal, the predetermined current flows from the first resistor R1 through the second resistor R2 to the reference voltage signal, and the voltage signal is generated at the first end of the first resistor R1.

[0114] Here, the reference voltage signal may include a power ground signal.

[0115] The voltage signal of each port generates a voltage-divided signal at the sampling node, and the voltage acquisition module 130 acquires the voltage value of the voltage-divided signal at the sampling node as the sampled voltage value. The voltage value of the port voltage signal is positively correlated with the voltage value of the voltage-divided signal (i.e., the sampled voltage value). Therefore, when the first port generates a voltage signal through the current source module 110, it can be determined whether the second port receives crosstalk through the voltage value of the voltage-divided signal of the second port.

[0116] By dividing the voltage signal of the port by the first resistor R1 and the second resistor R2, the voltage value of the voltage sampled by the voltage acquisition module 130 can be reduced, and the damage caused by the voltage value to the voltage acquisition module 130 can be reduced. A voltage acquisition module 130 with a lower withstand voltage value can be used.

[0117] By dividing the voltage signal of the interface by the first resistor R1 and the second resistor R2, the voltage value of the voltage sampled by the voltage acquisition module 130 can be reduced, and the damage caused by the voltage value to the voltage acquisition module 130 can be reduced. A voltage acquisition module 130 with a lower withstand voltage value can be used.

[0118] In some embodiments, Figure 6 As shown, the voltage acquisition module 130 includes a digital-to-analog converter (A / D), and the voltage acquisition module 130 is specifically used to sample the voltage division signal of the voltage signal on the sampling node to obtain the sampled voltage value.

[0119] The digital-to-analog converter can perform digital-to-analog conversion on the sampled voltage-dividing signal to obtain a sampled voltage value of the voltage-dividing signal. The control module 140 can read the sampled voltage value obtained by the digital-to-analog converter for digital-to-analog conversion, and compare the sampled voltage value with the voltage threshold to obtain a comparison result, thereby determining whether the port is subject to crosstalk from other ports.

[0120] In some embodiments, Figure 7 As shown, the voltage acquisition module 130 includes a voltage comparator, and the voltage acquisition module 130 is specifically used to compare the sampled voltage value of the voltage division signal with the voltage threshold to generate the comparison result.

[0121] Here, the voltage acquisition module 130 can be a comparator, and the comparator can directly compare the voltage division signal and the voltage threshold. Here, one input end of the comparator can be connected to a voltage signal with a voltage value of the voltage threshold, and the other input end of the comparator can be connected to a comparison voltage division signal, and the control module 140 can read the comparison result from the output end of the comparator. Then the controller can determine whether the port is subject to crosstalk from other ports.

[0122] In some embodiments, Figure 8As shown, the port crosstalk detection circuit further includes: a second switch S2 between the sampling node and the voltage acquisition module 130; The method further includes: controlling the second switch S2 to be turned on or off, so as to respectively turn on and off the reference voltage signal output to the voltage acquisition module 130 .

[0123] In a possible implementation, the port crosstalk detection circuit may have a voltage generation module 120; the sampling node of each port is connected to the voltage acquisition module 130 through the second switch S2. The control module 140 implements voltage sampling of nodes of different ports by opening and closing the second switch S2. The sampling node may include the voltage division signal sampling point in the above embodiment, and may include the port itself.

[0124] In a possible implementation, the second switch S2 may be implemented by using a switch transistor, for example, an N-channel MOS transistor or a P-channel MOS transistor.

[0125] like Figure 8 As shown, the sampling node is connected to a first end of the second switch S2 (N-channel MOS), and a second end of the second switch S2 (N-channel MOS) is connected to the voltage acquisition module 130 .

[0126] The control module 140 controls the conduction or disconnection of the second switch S2 corresponding to each port to implement sampling of the sampling node of each port, so as to determine the sampled voltage value of each port.

[0127] In some embodiments, the method further comprises: Control the current source module 110 to stop inputting a predetermined current to the corresponding port; Controlling the voltage acquisition module 130 to determine a sampled voltage value of the port voltage signal when the port does not have the predetermined current; It is determined whether the port is short-circuited based on the sampled voltage value.

[0128] Here, before performing the crosstalk detection, the control module 140 may also detect whether each port is short-circuited to the power supply.

[0129] For example, Figure 8 As shown, the first switch S1 can be disconnected to stop the current source module 110 from inputting a predetermined current to the corresponding port; when each port does not have the predetermined current, the sampled voltage value of the port voltage signal is determined (such as determining the sampled voltage value of the sampling node), and if the port sampled voltage value is greater than the short-circuit voltage threshold (such as being equal to the power supply voltage value), it is determined that the port is short-circuited.

[0130] A specific example is provided below in combination with any of the above embodiments: Port crosstalk detection circuit such as Figure 8 As shown, the method for detecting port crosstalk by the port crosstalk detection circuit includes: Step 1001: polling and detecting the voltage of all AIO channels (i.e. ports) through the A / D port (i.e. voltage acquisition module 130) to ensure that all channels are not short-circuited. Specifically, the voltage of each AIO channel is detected in turn through switch S2 (second switch). Step 1002: By closing switches S1 (first switch) and S2 (second switch) (S1 and S2 are in an open state by default) of an AIO detection circuit (first port), an internal current source flows through the first resistor R1 and the second resistor R2 and forms a voltage greater than a set value (e.g., 1V) at the AIO port.

[0131] Step 1003: Detect the voltage at the other AIO port (second port) through the A / D port.

[0132] Step 1004: Using the set value as the detection point, if the voltage of any second port exceeds the set value, it is considered that the second port forms crosstalk with the first port; otherwise, it is considered that there is no crosstalk between the channels.

[0133] Step 1005: Repeat steps 1002 to 1005 in order until any two AIO ports have been detected.

[0134] Step 1006: The information on whether all ports have passed the detection is stored in a register and read by the microcontroller.

[0135] The present application also provides an integrated circuit chip, including the port crosstalk detection circuit described in any of the above embodiments. The implementation of the port crosstalk detection circuit is as described in any of the above embodiments and will not be repeated here. In a possible implementation, the integrated circuit chip also includes N ports.

[0136] The present application also provides an electrical device, such as an airbag system, comprising the port crosstalk detection circuit described in any of the above embodiments or the integrated circuit chip described in any of the above embodiments.

[0137] In a possible implementation, the airbag system further includes an airbag.

[0138] The present application also provides a vehicle system, comprising a vehicle body and the airbag system described in any one of the above embodiments.

[0139] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the port crosstalk detection method as described above is implemented.

[0140] The computer-readable storage medium provided in this embodiment can execute the port crosstalk detection method of the above embodiment, and its implementation principle and technical effect are similar, which will not be described in detail in this embodiment.

[0141] The computer-readable storage medium mentioned above may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium may be any available medium that can be accessed by a general or special-purpose computer.

[0142] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in an electronic device or a main control device.

[0143] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0144] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0145] In the description of this specification, reference to "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A port crosstalk detection circuit, characterized in that: The port crosstalk detection circuit is applied to N ports, and the port crosstalk detection circuit includes: a current source module corresponding to each port, a voltage generation module corresponding to each port, a voltage acquisition module, and a control module, wherein the current source module is used to input a predetermined current from the port corresponding to the current source module to the voltage generation module; the voltage generation module is used to generate a voltage signal at the port corresponding to the voltage generation module based on the predetermined current; the voltage acquisition module is used to sample the voltage signal of the port to obtain a sampled voltage value; N is an integer greater than or equal to 2; The control module is used for: Controlling a current source module of a first port among the N ports to input a predetermined current into a voltage generation module of the first port, so as to generate a voltage signal at the first port; Controlling the voltage acquisition module to sample voltage signals of second ports other than the first port among the N ports to obtain a sampled voltage value corresponding to each of the second ports; According to the comparison result of the sampled voltage value corresponding to each second port and the voltage threshold, it is determined whether each second port is affected by the crosstalk of the first port.

2. The port crosstalk detection circuit according to claim 1, characterized in that: The current source module comprises: a current source and a first switch; The control module is used to control the first switch to be turned on or off, so as to respectively turn on or off the predetermined current input by the current source to the corresponding port.

3. The port crosstalk detection circuit according to claim 1, characterized in that: The voltage generating module includes: a first resistor and a second resistor; the first end of the first resistor is connected to the port, the second end of the first resistor is connected to the first end of the second resistor as a sampling node of the voltage acquisition module, the second end of the second resistor is connected to a reference voltage signal, the predetermined current flows from the first resistor through the second resistor to the reference voltage signal, and the voltage signal is generated at the first end of the first resistor.

4. The port crosstalk detection circuit according to claim 3, characterized in that: The voltage acquisition module includes a digital-to-analog converter, and the voltage acquisition module is specifically used to sample the voltage division signal of the voltage signal on the sampling node to obtain the sampled voltage value; or, The voltage acquisition module includes a voltage comparator, and the voltage acquisition module is specifically used to compare the sampled voltage value of the voltage division signal with the voltage threshold to generate the comparison result.

5. The port crosstalk detection circuit according to claim 3, characterized in that: The port crosstalk detection circuit further includes: a second switch between the sampling node and the voltage acquisition module; The control module is used to control the on or off of the second switch to respectively turn on and off the reference voltage signal output to the voltage acquisition module.

6. The port crosstalk detection circuit according to any one of claims 1 to 5, characterized in that: The control module is used for: Controlling the current source module to stop inputting a predetermined current to the corresponding port; Controlling the voltage acquisition module to determine a sampled voltage value of the port voltage signal when the port does not have the predetermined current; It is determined whether the port is short-circuited based on the sampled voltage value.

7. A port crosstalk detection method, characterized in that: The method is applied to a port crosstalk detection circuit, the port crosstalk detection circuit is applied to N ports, and the port crosstalk detection circuit comprises: a current source module corresponding to each port, a voltage generation module corresponding to each port, and a voltage acquisition module, wherein the current source module is used to input a predetermined current from the port corresponding to the current source module to the voltage generation module; the voltage generation module is used to generate a voltage signal at the port corresponding to the voltage generation module based on the predetermined current; the voltage acquisition module is used to sample the voltage signal of the port to obtain a sampled voltage value; N is an integer greater than or equal to 2; The method comprises: Controlling a current source module of a first port among the N ports to input a predetermined current into a voltage generation module of the first port, so as to generate a voltage signal at the first port; Controlling the voltage acquisition module to sample voltage signals of second ports other than the first port among the N ports to obtain a sampled voltage value corresponding to each of the second ports; According to the comparison result of the sampled voltage value corresponding to each second port and the voltage threshold, it is determined whether each second port is affected by the crosstalk of the first port.

8. The port crosstalk detection method according to claim 7, characterized in that: The current source module comprises: a current source and a first switch; The method further includes: controlling the first switch to be turned on or off, so as to respectively turn on or off the predetermined current input by the current source to the corresponding port.

9. The port crosstalk detection method according to claim 7, characterized in that: The voltage generating module includes: a first resistor and a second resistor; the first end of the first resistor is connected to the port, the second end of the first resistor is connected to the first end of the second resistor as a sampling node of the voltage acquisition module, the second end of the second resistor is connected to a reference voltage signal, the predetermined current flows from the first resistor through the second resistor to the reference voltage signal, and the voltage signal is generated at the first end of the first resistor.

10. The port crosstalk detection method according to claim 9, characterized in that: The voltage acquisition module includes a digital-to-analog converter, and the voltage acquisition module is specifically used to sample the voltage division signal of the voltage signal on the sampling node to obtain the sampled voltage value; or, The voltage acquisition module includes a voltage comparator, and the voltage acquisition module is specifically used to compare the sampled voltage value of the voltage division signal with the voltage threshold to generate the comparison result.

11. The port crosstalk detection method according to claim 9, characterized in that: The port crosstalk detection circuit further includes: a second switch between the sampling node and the voltage acquisition module; The method further includes: controlling the second switch to be turned on or off, so as to respectively turn on and off the reference voltage signal output to the voltage acquisition module.

12. The port crosstalk detection method according to any one of claims 7 to 11, characterized in that: The method further comprises: Controlling the current source module to stop inputting a predetermined current to the corresponding port; Controlling the voltage acquisition module to determine a sampled voltage value of the port voltage signal when the port does not have the predetermined current; It is determined whether the port is short-circuited based on the sampled voltage value.

13. An integrated circuit chip, characterized in that: The integrated circuit chip comprises N ports and the port crosstalk detection circuit according to any one of claims 1 to 6.

14. An electrical device, characterized in that: The electrical equipment comprises: The port crosstalk detection circuit according to any one of claims 1 to 6; or The integrated circuit chip of claim 13.

15. A storage medium having an executable program stored thereon, characterized in that: When the executable program is executed by a processor, the steps of the port crosstalk detection method according to any one of claims 7 to 12 are implemented.

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