CN117406144A - Interface detection circuit and electronic equipment - Google Patents
Interface detection circuit and electronic equipment Download PDFInfo
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- CN117406144A CN117406144A CN202311030300.XA CN202311030300A CN117406144A CN 117406144 A CN117406144 A CN 117406144A CN 202311030300 A CN202311030300 A CN 202311030300A CN 117406144 A CN117406144 A CN 117406144A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
- G01R31/69—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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Abstract
The application discloses an interface detection circuit and electronic equipment, wherein the interface detection circuit is applied to the electronic equipment and is connected with a connection interface in the electronic equipment; the connection interface comprises a detection pin; the interface detection circuit comprises a detection module, an output module and a control module; the detection module is connected with the detection pin and the output module, and the output module is also connected with the control module; the detection module is used for identifying the level signal of the detection pin and outputting a first detection signal to the output module when the level signal is a first level signal or outputting a second detection signal to the output module when the level signal is a second level signal; the output module is used for outputting the first detection signal and the second detection signal to the control module; the control module is used for controlling the connecting interface to enter a first working mode according to the first detection signal or controlling the connecting interface to enter a second working mode according to the second detection signal; the method and the device can effectively reduce cost.
Description
Technical Field
The application relates to the technical field of electronic circuits, in particular to an interface detection circuit and electronic equipment.
Background
The interfaces supporting the charging function in the market at present mainly comprise a Micro USB interface, a Type C interface and a Lightning interface, and the Type C interface becomes standard with the future development; the Type C interface becomes standard, and the CC logic control chip supporting Type C insertion identification also becomes an indispensable device, and for an electronic product only needing to have an insertion identification function, if the CC logic control chip is configured for the corresponding interface, the cost of the product will be increased.
Disclosure of Invention
The application provides an interface detection circuit and electronic equipment to alleviate current electronic equipment and utilize CC logic chip to insert the problem that discernment cost is high.
The application provides an interface detection circuit which is applied to electronic equipment and is connected with a connection interface in the electronic equipment; the connection interface comprises a detection pin; the interface detection circuit comprises a detection module, an output module and a control module; the detection module is connected with the detection pin and the output module, and the output module is also connected with the control module;
the detection module is used for identifying the level signal of the detection pin and outputting a first detection signal to the output module when the level signal is a first level signal or outputting a second detection signal to the output module when the level signal is a second level signal; the output module is used for outputting the first detection signal and the second detection signal to the control module; the control module is used for controlling the connection interface to enter a first working mode according to the first detection signal or controlling the connection interface to enter a second working mode according to the second detection signal.
The interface detection circuit in some embodiments, the detection pin comprises a first pin and a second pin, the detection module comprises a first detection unit and a second detection unit, the output module comprises a first output unit and a second output unit, the first detection unit is connected with the first pin and the first output unit, and the second detection unit is connected with the second pin and the second output unit; the first output unit and the second output unit are both connected with the control module.
In some embodiments, the interface detection circuit includes a control module including a first port and a second port, the first port being connected to the first output unit, the second port being connected to the second output unit; the first port is used for receiving a first detection signal or a second detection signal output by the first output unit; the second port is used for receiving the first detection signal or the second detection signal output by the second output unit.
The interface detection circuit in some embodiments, the detection module includes a first diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first triode, and a second triode;
the positive pole of first diode connects the electricity, the negative pole of first diode is connected with the one end of first resistance, the other end of first resistance is connected with the one end and the detection pin of second resistance, the other end of second resistance and the one end of third resistance are connected with the base of first triode, the projecting pole of first triode is connected with the fourth resistance, the other end of third resistance and the other end of fourth resistance all ground connection, the collecting electrode of first triode is connected with the base of second triode and the one end of fifth resistance, the other end termination electricity of fifth resistance, the one end termination electricity of sixth resistance, the other end of sixth resistance and the collecting electrode of second triode all are connected with output module, the projecting pole of second triode passes through seventh resistance ground connection.
In the interface detection circuit in some embodiments, the first detection unit includes a second diode and an eighth resistor, a cathode of the second diode is connected with the first pin, an anode of the second diode is connected with one end of the eighth resistor and the output module, and the other end of the eighth resistor is electrically connected.
In the interface detection circuit in some embodiments, the second detection unit includes a third diode and a ninth resistor, the negative electrode of the third diode is connected with the second pin, the positive electrode of the third diode is connected with one end of the ninth resistor and the output module, and the other end of the ninth resistor is electrically connected.
In some embodiments, the output module includes a tenth resistor, one end of the tenth resistor is connected to the other end of the sixth resistor and the control module, and the other end of the tenth resistor is grounded.
In some embodiments, the interface detection circuit includes an eleventh resistor, and one end of the eleventh resistor is connected to one end of the eighth resistor and the control module.
In some embodiments, the interface detection circuit includes a twelfth resistor, and one end of the twelfth resistor is connected to one end of the ninth resistor and the control module.
The embodiment of the application also provides electronic equipment which comprises a connection interface and the interface detection circuit.
According to the interface detection circuit and the electronic device, the external device inserted into the connection interface is identified only according to the level signal of the detection pin of the connection interface through the interface detection circuit, so that the working mode of the connection interface is controlled, an independent logic control chip is not required to be arranged, the structure of the detection circuit is simplified, and cost is reduced.
Drawings
Technical solutions and other advantageous effects of the present application will be made apparent from the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a block diagram of an interface detection circuit in an electronic device according to an embodiment of the present application.
Fig. 2 and fig. 3 are circuit diagrams of a first detection unit, a second detection unit, a first output unit, and a second output unit in the electronic device according to the embodiments of the present application.
Fig. 4 and fig. 5 are circuit diagrams of an interface detection module and an output module in an electronic device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defining "first," "second," or the like, may explicitly or implicitly include one or more features, and in the description of the present invention, a meaning of "a plurality" is two or more, unless otherwise specifically defined.
Referring to fig. 1, the present embodiment provides an electronic device, which may be a tablet computer, in which a connection interface 10 is provided, and the connection interface 10 may be a Type C interface. The electronic device in the present application further includes an interface detection circuit 20, where the interface detection circuit 20 is connected to the connection interface 10, and the interface detection circuit 20 is configured to identify whether an external device inserted by the connection interface is a master device or a slave device, and if the external device is the master device, the electronic device is equivalent to the slave device; if the external device is a slave device, the electronic device acts as a master device.
The connection interface 10 comprises a detection pin, and the interface detection circuit 20 comprises a detection module 100, an output module 200 and a control module 300; the detection module 100 is connected with the detection pin and the output module 200, and the output module 200 is also connected with the control module 300. The detection module 100 is configured to identify a level signal of the detection pin, and output a first detection signal to the output module 200 when the level signal is a first level signal, or output a second detection signal to the output module 200 when the level signal is a second level signal; the output module 200 is configured to output the first detection signal and the second detection signal to the control module 300; the control module 300 is configured to control the connection interface 10 to enter the first operation mode according to the first detection signal, or to control the connection interface 10 to enter the second operation mode according to the second detection signal.
When the connection interface 10 is not plugged into an external device or the plugged external device is a main device, the detection pin of the connection interface 10 outputs a first level signal, and the first level signal in the embodiment is a high level signal; when the external device inserted by the connection interface 10 is a slave device, the detection pin of the connection interface 10 outputs a second level signal, which is a low level signal in this embodiment. When the detection module 100 detects that the detection pin is a high-level signal, a first detection signal is output according to the high-level signal, and the first detection signal in this embodiment is a high-level signal; when the detection module 100 detects that the detection pin is a low level signal, a second detection signal is output according to the low level signal, and the second detection signal in this embodiment is a low level signal. Then, the output module 200 outputs the first detection signal or the second detection signal to the control module 300, when the control module 300 controls the connection interface 10 to be in a first working mode according to the high-level signal, that is, the electronic device at the moment is used as a slave device, the external device inserted into the connection interface 10 is used as a master device, and the first working mode is a mode in which the connection interface 10 adapts the slave device to work; when the control module 300 controls the connection interface 10 to be in the second operation mode according to the low level signal, that is, the electronic device is the master device, the external device inserted by the connection structure is the slave device, and the second operation mode is the mode in which the connection interface 10 is operated by the master device. The control module 300 of the present application may be a CPU of an electronic device.
The interface detection circuit 20 in the application only identifies whether the connection interface 10 is inserted as a master or a slave according to the level signal of the detection pin of the connection interface 10, and an independent logic control chip is not required to be arranged, so that the structure of the detection circuit is simplified, and the cost is reduced.
Referring to fig. 2 and 3 together, in some embodiments, the detection pin includes a first pin and a second pin, the detection module 100 includes a first detection unit 110 and a second detection unit 120, the output module 200 includes a first output unit 210 and a second output unit 220, the first detection unit 110 is connected to the first pin and the first output unit 210, and the second detection unit 120 is connected to the second pin and the second output unit 220; the first output unit 210 and the second output unit 220 are both connected to the control module 300. The detection pin in this application is the CC pin, and interface 10 includes that two CC pins are first pin CC1 and second pin CC2 respectively, and the accessible sets up a detecting element respectively to two pins for the detection of two CC pins mutually independent.
Correspondingly, the control module 300 comprises a first port and a second port, wherein the first port is connected with the first output unit 210, and the second port is connected with the second output unit 220; the first port is configured to receive the first detection signal or the second detection signal output by the first output unit 210; the second port is configured to receive the first detection signal or the second detection signal output by the second output unit 220; that is, the control module 300 in this embodiment is adapted to two CC pins in the connection structure, and two ports are correspondingly provided, where each port correspondingly receives a detection result of one CC pin, so as to implement independent detection of the two CC pins. Of course, in some embodiments, the control module 300 may also be provided with only one port connected to the first output unit 210 and the second output unit 220, and specifically may be provided according to actual needs, which is not limited in this application.
Referring to fig. 4 and fig. 5 together, of course, in some embodiments, two CC pins may share a detection circuit structure; i.e. two CC pins share the detection module 100 at this time. Correspondingly, the detection module 100 comprises a first diode D1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first triode Q1 and a second triode Q2; the positive pole of first diode D1 connects the electricity, the negative pole of first diode D1 is connected with the one end of first resistance R1, the other end of first resistance R1 is connected with the one end and the detection pin of second resistance R2, the other end of second resistance R2 and one end of third resistance R3 are connected with the base of first triode Q1, first triode Q1's projecting pole is connected with fourth resistance R4, the other end of third resistance R3 and the other end of fourth resistance R4 all ground, first triode Q1's collecting electrode is connected with the base of second triode Q2 and one end of fifth resistance R5, the other end termination electricity of fifth resistance R5, the one end termination electricity of sixth resistance R6, the other end of sixth resistance R6 and the collecting electrode of second triode Q2 all are connected with output module 200, the projecting pole of second triode Q2 passes through seventh resistance R7 ground.
As an embodiment, the output module 200 includes a tenth resistor R10, one end of the tenth resistor R10 is connected to the other end of the sixth resistor R6 and the control module 300, and the other end of the tenth resistor R10 is grounded.
When the connection interface 10 is not plugged into an external device, the level of the other end of the first resistor R1 and the level of the other end of the second resistor R2, that is, the level of the CC1 pin or the level of the CC2 pin, are pulled up by VDD1, the corresponding first triode Q1 is turned on, and the second triode Q2 is turned off, so that the level signal at one end of the tenth resistor R10, that is, the level signal at the usb_id end, is pulled up by VDD1 to be a high level signal. When the external device is inserted into the connection interface 10 as the main device, as shown in fig. 4, the resistor R01 is used as the load corresponding to the main device, the main device will pull the level signal of the detection pin high, the level of the other end of the first resistor R1 and the level of the other end of the second resistor R2 are correspondingly high at this time, the corresponding first triode Q1 is conducted, the second triode Q2 is not conducted, and then the level signal of the usb_id end of one end of the tenth resistor R10 is pulled up by VDD1 to be high. Thus, when the control module 300 detects that the level signal of one end of the tenth resistor R10 is a high level signal, it recognizes that the external device to which the connection interface 10 is inserted is a master device or that the connection interface 10 is not inserted.
When the external device is plugged into the connection interface 10 as the slave device, as shown in fig. 5, the resistor R02 is used as the load corresponding to the slave device, the slave device will pull the level signal of the detection pin low, the level of the other end of the first resistor R1 and the level of the other end of the second resistor R2 are the low level signals, the corresponding first triode Q1 is not conducted, and the second triode Q2 is conducted, then the level signal of one end of the tenth resistor R10, namely the usb_id end, is pulled down to the low level signal, and the corresponding control module 300 will detect the level signal, so as to identify the external device plugged into the connection interface 10 as the slave device.
In the application, the interface detection circuit 20 is arranged only through simple components of the resistor and the triode to replace the identification function of the logic control chip, so that the cost can be effectively reduced.
As an embodiment, if two CC pins are respectively provided with one detection unit. With continued reference to fig. 2, for the first pin, the first detection unit 110 includes a second diode D2 and an eighth resistor R8, the cathode of the second diode D2 is connected to the first pin, the anode of the second diode D2 is connected to one end of the eighth resistor R8 and the output module 200, and the other end of the eighth resistor R8 is electrically connected to the output module 200; the first output unit 210 includes an eleventh resistor R11, and one end of the eleventh resistor R11 is connected to one end of the eighth resistor R8 and the control module 300.
When the external device is not plugged into the connection interface 10, the negative electrode of the second diode D2, i.e. the pin CC1, is correspondingly at the high level, and the second diode D2 is not turned on, then the level signal at one end of the eleventh resistor R11, i.e. the end usb_id1, is pulled up by VDD1 to be at the high level, and the corresponding control module 300 detects the level signal. If the connection interface 10 is inserted into the host device, the resistor R01 is used as the load corresponding to the host device, the host device will pull up the level signal of the detection pin, and correspondingly, the negative electrode of the second diode D2, that is, the CC pin is at a high level, and the second diode D2 is not turned on, then, the level signal at one end of the eleventh resistor R11, that is, the usb_id1 end, is pulled up by VDD1 to be a high level signal, and the corresponding control module 300 will detect the level signal. Thus, when the control module 300 detects that the level signal at the usb_id1 terminal, which is one terminal of the eleventh resistor R11, is a high level signal, it recognizes that the external device to which the connection interface 10 is plugged is a master device or that the connection interface 10 is not plugged.
When the external device is plugged into the connection interface 10 as the slave device, the resistor R02 is used as the load corresponding to the slave device, the slave device will pull the level signal of the detection pin low, and correspondingly, the negative electrode of the second diode D2 is at a low level at this time, the second diode D2 is turned on, and then the level signal at one end of the eleventh resistor R11, that is, the end of the usb_id1, is pulled low to be a low level signal, and the corresponding control module 300 will detect the level signal. Thus, when the control module 300 detects that the level signal at one end of the eleventh resistor R11 is a low level signal, it recognizes that the external device into which the connection interface 10 is inserted is a slave device.
With continued reference to fig. 3, for the second pin, the second detection unit 120 includes a third diode D3 and a ninth resistor R9, where a cathode of the third diode D3 is connected to the second pin, an anode of the third diode D3 is connected to one end of the ninth resistor R9 and the output module 200, and the other end of the ninth resistor R9 is electrically connected to the output module 200; the second output unit 220 includes a twelfth resistor R12, and one end of the twelfth resistor R12 is connected to one end of the ninth resistor R9 and the control module 300.
When the external device is not plugged into the connection interface 10, the negative electrode of the third diode D3, that is, the pin CC2, is correspondingly at the high level, and the third diode D3 is not turned on, then the level signal at one end of the twelfth resistor R12, that is, the end usb_id2, is pulled up by VDD1 to be at the high level, and the corresponding control module 300 detects the level signal. If the connection interface 10 is inserted into the host device, the resistor R01 is used as a load corresponding to the host device, the host device will pull up the level signal of the detection pin, and correspondingly, the negative electrode of the third diode D3 is at a high level at this time, the third diode D3 is not turned on, and then the level signal at one end of the twelfth resistor R12, that is, the usb_id2 end, is pulled up by VDD1 to be a high level signal, and the corresponding control module 300 will detect the level signal. Thus, when the control module 300 detects that the level signal at one end of the twelfth resistor R12, that is, the usb_id2 end, is a high level signal, it recognizes that the external device to which the connection interface 10 is plugged is a master device or that the connection interface 10 is not plugged.
When the external device is plugged into the connection interface 10 as the slave device, the resistor R02 is used as the load corresponding to the slave device, the slave device pulls the level signal of the detection pin low, and correspondingly, the negative electrode of the third diode D3 is at a low level at this time, the third diode D3 is turned on, and then the level signal at one end of the twelfth resistor R12 is pulled down to be a low level signal at this time, and the corresponding control module 300 detects the level signal. Thus, when the control module 300 detects that the level signal at one end of the twelfth resistor R12 is a low level signal, it recognizes that the external device into which the connection interface 10 is inserted is a slave device.
The embodiment of the present application further provides an electronic device, which includes the connection interface 10 and the above-mentioned interface detection circuit 20, where the interface detection circuit 20 is connected to the connection interface 10, and since the above description of the interface detection circuit 20 is omitted here.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The foregoing describes the interface detection circuit provided in the embodiments of the present application in detail, and specific examples are applied to illustrate the principles and embodiments of the present application, where the foregoing description of the embodiments is only used to help understand the technical solution and core ideas of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. An interface detection circuit is characterized by being applied to electronic equipment and being connected with a connection interface in the electronic equipment; the connection interface comprises a detection pin; the interface detection circuit comprises a detection module, an output module and a control module; the detection module is connected with the detection pin and the output module, and the output module is also connected with the control module;
the detection module is used for detecting the level signal of the detection pin and outputting a first detection signal to the output module when the level signal is a first level signal or outputting a second detection signal to the output module when the level signal is a second level signal; the output module is used for outputting the first detection signal and the second detection signal to the control module; the control module is used for controlling the connection interface to enter a first working mode according to the first detection signal or controlling the connection interface to enter a second working mode according to the second detection signal.
2. The interface detection circuit of claim 1, wherein the detection pin comprises a first pin and a second pin, the detection module comprises a first detection unit and a second detection unit, the output module comprises a first output unit and a second output unit, the first detection unit is connected with the first pin and the first output unit, and the second detection unit is connected with the second pin and the second output unit; the first output unit and the second output unit are both connected with the control module.
3. The interface detection circuit of claim 2, wherein the control module comprises a first port and a second port, the first port being connected to the first output unit, the second port being connected to the second output unit; the first port is used for receiving the first detection signal or the second detection signal output by the first output unit; the second port is used for receiving the first detection signal or the second detection signal output by the second output unit.
4. The interface detection circuit of claim 1, wherein the detection module comprises a first diode, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first triode, and a second triode;
the positive pole of first diode connects the electricity, the negative pole of first diode with the one end of first resistance is connected, the other end of first resistance with the one end of second resistance with detect the pin and be connected, the other end of second resistance with the one end of third resistance with the base of first triode is connected, the projecting pole of first triode with the fourth resistance is connected, the other end of third resistance with the other end of fourth resistance is all grounded, the collecting electrode of first triode with the base of second triode with the one end of fifth resistance is connected, the other end of fifth resistance is connected the electricity, the one end of sixth resistance is connected the electricity, the other end of sixth resistance with the collecting electrode of second triode all with output module is connected, the projecting pole of second triode passes through the seventh resistance ground connection.
5. The interface detection circuit according to claim 3, wherein the first detection unit includes a second diode and an eighth resistor, a cathode of the second diode is connected to the first pin, an anode of the second diode is connected to one end of the eighth resistor and the output module, and the other end of the eighth resistor is electrically connected.
6. The interface detection circuit according to claim 3, wherein the second detection unit includes a third diode and a ninth resistor, a cathode of the third diode is connected to the second pin, an anode of the third diode is connected to one end of the ninth resistor and the output module, and the other end of the ninth resistor is electrically connected.
7. The interface detection circuit of claim 4, wherein the output module comprises a tenth resistor, one end of the tenth resistor is connected to the other end of the sixth resistor and the control module, and the other end of the tenth resistor is grounded.
8. The interface detection circuit of claim 5, wherein the first output unit comprises an eleventh resistor, one end of the eleventh resistor being connected to one end of the eighth resistor and the control module.
9. The interface detection circuit of claim 6, wherein the second output unit comprises a twelfth resistor, one end of the twelfth resistor being connected to one end of the ninth resistor and the control module.
10. An electronic device comprising a connection interface and an interface detection circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311030300.XA CN117406144A (en) | 2023-08-15 | 2023-08-15 | Interface detection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311030300.XA CN117406144A (en) | 2023-08-15 | 2023-08-15 | Interface detection circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117406144A true CN117406144A (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311030300.XA Pending CN117406144A (en) | 2023-08-15 | 2023-08-15 | Interface detection circuit and electronic equipment |
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| CN (1) | CN117406144A (en) |
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- 2023-08-15 CN CN202311030300.XA patent/CN117406144A/en active Pending
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