CN211349341U - Signal switching device and electronic equipment - Google Patents
Signal switching device and electronic equipment Download PDFInfo
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- CN211349341U CN211349341U CN202020239686.0U CN202020239686U CN211349341U CN 211349341 U CN211349341 U CN 211349341U CN 202020239686 U CN202020239686 U CN 202020239686U CN 211349341 U CN211349341 U CN 211349341U
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Abstract
The utility model provides a pair of signal switching device and electronic equipment, this signal switching device select module, switching module and switching control module through setting up, export USB signal or debug information alternative to the switching module through selecting the module, and the switching module carries out corresponding conversion or transmission with the signal, exports through the USB interface, can realize that the USB interface both can transmit conventional USB signal, also can transmit debug information. In the conventional use process, the USB signal of the SOC chip can be selectively transmitted to the USB interface for output, when debug information of the SOC chip needs to be acquired, the UART signal (namely the debug information) can be selectively converted and transmitted to the USB interface for output, the debug information of the electronic equipment can be acquired by utilizing the existing USB interface of the equipment, disassembly is not needed, one port is multipurpose, and problem detection or testing can be conveniently carried out on the electronic equipment.
Description
Technical Field
The utility model relates to an electronic circuit technical field particularly, relates to a signal switching device and electronic equipment.
Background
Most of the existing electronic devices, such as mobile phones, tablets or computers, have USB ports for USB communication, such as USB disk, mobile hard disk, or display and Type C earphone (USB interface in Type C format). In the research and development process, debug information of the prototype SOC chip is normally acquired through a measuring point of a UART signal of the SOC chip connected to a prototype mainboard. When a prototype has a fault, the shell needs to be detached, even the mainboard needs to be detached, then the PC is connected with the UART test point on the prototype mainboard to acquire debug information of the SOC chip, so that time is consumed, secondary damage can be caused to the prototype or the mainboard, even the fault phenomenon is damaged, huge influence is brought to analysis, and the debug information of the system cannot be acquired through the USB interface.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a signal switching device and electronic equipment to improve current electronic equipment and can't obtain debug information scheduling problem through the USB interface. The utility model adopts the technical scheme as follows:
the utility model provides a signal switching device, which is applied to electronic equipment, wherein the electronic equipment comprises an SOC chip and a USB interface, and the SOC chip comprises a USB signal output end and a UART signal output end; the signal switching device comprises: the switching control module is used for switching the switching control module; the signal input end of the selection module is connected with the SOC chip, and the control end of the selection module is connected with the switching control module; the signal input end of the switching module is connected with the signal output end of the selection module, the signal output end of the switching module is connected with the USB interface, and the control end of the switching module is connected with the switching control module; the switching control module is used for generating a control signal and transmitting the control signal to the selection module and the switching module; the selection module is used for transmitting the USB signal output by the USB signal output end or the UART signal output by the UART signal output end to the switching module according to the control signal of the switching control module; the switching module is used for converting the UART signal output by the selection module into a conversion USB signal according to the control signal of the switching control module so as to switch the conversion USB signal to the USB interface for output; the switching module is further configured to switch the USB signal output by the selection module to the USB interface for output according to the control signal of the switching control module.
Furthermore, the switching control module comprises a first control signal output end and a second control signal output end; the first control signal output end is used for outputting the first control signal so that the switching module outputs the converted USB signal to the USB interface; the second control signal output end is used for outputting the second control signal so that the switching module outputs the USB signal to the USB interface.
Furthermore, the signal input end of the selection module comprises a first signal input end and a second signal input end, the first signal input end is connected with the USB signal output end, and the second signal input end is connected with the UART signal output end;
the control end of the selection module is used for receiving a first control signal, and the selection module is used for transmitting a signal accessed by the first signal input end or the second signal input end to the switching module according to the first control signal.
Further, the first control signal comprises a first level state or a second level state;
when the first control signal is in a first level state, the selection module transmits the USB signal received by the first signal input end to the switching module;
when the first control signal is in a second level state, the selection module transmits the UART signal received by the second signal input terminal to the switching module.
Further, the switching module comprises a first switching unit; the input end of the first switching unit is connected with the output end of the selection module; the output end of the first switching unit is connected with the USB interface; the first switching unit is also connected with the first control signal output end to receive a first control signal of the switching control module; the first switching unit is used for converting the UART signal transmitted by the selection module into the conversion USB signal when the first control signal is in a second level state, so as to output the conversion USB signal through the USB interface.
Further, the switching module further comprises a second switching unit; the input end of the second switching unit is connected with the output end of the selection module; the output end of the second switching unit is connected with the USB interface; the second switching unit is also connected with the second control signal output end to receive a second control signal of the switching control module; and the second switching unit is used for transmitting the USB signal transmitted by the selection module to the USB interface to be output through the USB interface when the second control signal is in a second level state.
Further, the first control signal output end is connected to the second control signal output end through an inverter, the level states of the first control signal and the second control signal are opposite, and when the first control signal is in the first level state, the second control signal is in the second level state; when the first control signal is in the second level state, the second control signal is in the first level state.
Furthermore, the switching control module further comprises a switch, a first resistor and a second resistor, a first end of the switch is connected with a power supply, a second end of the switch is grounded sequentially through the first resistor and the second resistor, a sampling point is formed between the first resistor and the second resistor, and the first control signal output end is connected with the sampling point and used for taking a signal of the sampling point as the first control signal.
Further, when the switch is turned off, the sampling point is at a low level, the first control signal is in the first level state, and the second control signal is in the second level state;
when the switch is closed, the sampling point is at a high level, the first control signal is at the second level state, and the second control signal is at the first level state.
The utility model also provides an electronic equipment, electronic equipment includes foretell signal switching device.
Compared with the prior art, the utility model provides a technical scheme has following beneficial effect:
the utility model provides a signal switching device and electronic equipment, this signal switching device select module, switching module and switching control module through setting up, export USB signal or debug information alternative to the switching module through selecting the module, and the switching module carries out corresponding conversion or transmission with the signal, exports through the USB interface, can realize that the USB interface both can transmit conventional USB signal, also can transmit debug information. In the conventional use process, the USB signal of the SOC chip can be selectively transmitted to the USB interface for output, when debug information of the SOC chip needs to be acquired, a UART signal (namely the debug information) can be selectively transmitted to the USB interface for output, so that the debug information of the electronic equipment can be acquired by utilizing the existing USB interface of the equipment, the equipment does not need to be dismounted, one port has multiple purposes, and the problem detection or the test on the electronic equipment is facilitated.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 shows a schematic diagram of a signal transfer device provided by the present invention.
Fig. 2 is a schematic diagram of another signal transfer device provided by the present invention.
Fig. 3 shows a schematic diagram of a switching control module provided by the present invention.
Icon: 100-signal switching means; 110-a selection module; s _ IN-signal input end; a first signal input terminal of S _ IN 1; s _ IN 2-second signal input; s _ OUT-signal output end; s _ S-control end; 120-a patching module; t _ IN-signal input; t _ OUT-signal output terminal; t1 — first transit unit; t1_ IN-input; t1_ S-control end; t1_ OUT-output; t2 — second transit unit; t2_ IN-input; t2_ S-control end; t2_ OUT-output; 130-a handover control module; c1 — first control signal output; c2 — second control signal output; k is a change-over switch; q-sampling point; 210-SOC chip; 220-a USB interface; r1 — first resistance; r2-second resistance.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
In the description of the present invention, it should also be noted that relational terms such as first and second, and the like, may be used solely herein to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict. The existing electronic equipment such as mobile phones, tablet computers, PCs and the like generally comprises an SOC chip and a USB interface, wherein the SOC chip comprises a USB signal output end and a UART signal output end; the UART signal output end is used for outputting UART signals of the SOC chip, namely debug information. Generally speaking, electronic equipment's USB interface can only transmit the USB signal of SOC chip, conventional USB communication information promptly, the utility model provides a signal switching device for the USB interface of realization through equipment acquires the debug information of SOC chip.
Referring to fig. 1, fig. 1 shows a schematic diagram of a signal adapter 100 according to the present embodiment. The signal adapter 100 provided in this embodiment is applied to an electronic device, and the signal adapter 100 includes: a selection module 110, a switch control module 130 and a transfer module 120. The selection module 110 includes a signal input terminal S _ IN and a signal output terminal S _ OUT, the signal input terminal S _ IN of the selection module 110 is connected to the SOC chip 210, the signal output terminal S _ OUT of the selection module 110 is connected to the transfer module 120, the selection module 110 further includes a control terminal S _ S, and the control terminal S _ S of the selection module 110 is connected to the switching control module 130. The SOC chip 210 includes a USB signal output end and a UART signal output end, and the selection module 110 is configured to transmit a signal output by the USB signal output end or the UART signal output end to the adaptor module 120 according to a control signal of the switching control module 130, where the signal output by the USB signal output end is USB communication information, and the signal output by the UART signal output end is a UART signal, that is, debug information of the system.
The signal input terminal T _ IN of the adaptor module 120 is connected to the signal output terminal S _ OUT of the selection module 110, the signal output terminal T _ OUT of the adaptor module 120 is connected to the USB interface 220, the control terminal (not shown) of the adaptor module 120 is connected to the switching control module 130, and the adaptor module 120 is configured to convert a signal (which may be a USB signal or a UART signal) output by the selection module 110 into a USB signal according to the control signal of the switching control module 130, so as to transfer the USB signal to the USB interface 220 for output. For example, when the selection module 110 transmits the signal output by the USB signal output end to the adaptor module 120, the adaptor module 120 directly transmits the signal output by the USB signal output end to the USB interface 220 for output, and when the selection module 110 transmits the signal output by the UART signal output end to the adaptor module 120, the adaptor module 120 converts the signal into a converted USB signal, and then transmits the converted USB signal to the USB interface 220 for output, so that the USB interface 220 can transmit both the conventional USB communication information and debug information (UART signal).
The switching control module 130 is configured to generate a control signal and transmit the control signal to the selection module 110 and the switching module 120, so that the selection module 110 and the switching module 120 operate in a preset mode according to the control signal; for example, the selection module 110 is controlled to transmit the signal output by the USB signal output terminal or the UART signal output terminal to the adaptor module 120, and the adaptor module 120 is controlled to convert or transmit the signal.
The signal switching apparatus 100 provided in this embodiment can realize that the USB interface 220 can transmit both the conventional USB signal and debug information by arranging the selection module 110, the switching module 120 and the switching control module 130. In the conventional use process, the USB signal of the SOC chip 210 can be selectively transmitted to the USB interface 220 for output, and when the debug information of the SOC chip 210 needs to be acquired, the UART signal (i.e., the debug information) can be selectively transmitted to the USB interface 220 for output, so that the debug information of the electronic device can be acquired by using the existing USB interface 220 of the device, and the electronic device can be conveniently subjected to problem detection or test without disassembling the device.
Referring to fig. 2, the switching control module 130 includes a first control signal output terminal C1 and a second control signal output terminal C2; the control signal comprises a first control signal and a second control signal, the first control signal output terminal C1 is used for outputting the first control signal, and the second control signal output terminal C2 is used for outputting the second control signal, wherein the level states of the first control signal and the second control signal are opposite.
In a possible implementation manner, referring to fig. 3, the switching control module 130 further includes a switch K, a first resistor R1 and a second resistor R2, a first end of the switch K is connected to a power supply, a second end of the switch is grounded via a first resistor R1 and a second resistor R2 in sequence, a sampling point Q is formed between the first resistor R1 and the second resistor R2, and a first control signal output terminal C1 is connected to the sampling point Q to use a signal of the sampling point Q as a first control signal.
In this embodiment, the power source may be a VCC power source of 5V, the resistance of the first resistor R1 may be selected to be 1k Ω, and the resistance of the second resistor R2 may be set to be 10k Ω.
In one possible implementation, the first control signal output terminal C1 is connected to the second control signal output terminal C2 through an inverter, the level state of the first control signal is opposite to that of the second control signal, and when the first control signal is in the first level state, the second control signal is in the second level state; when the first control signal is in the second level state, the second control signal is in the first level state.
When the change-over switch K is switched off, the sampling point Q is at a low level, the first control signal is in a first level state, and the second control signal is in a second level state; when the switch K is turned on, the sampling point Q is at a high level, the first control signal is in a second level state, and the second control signal is in a first level state.
Referring to fig. 2, the signal input terminal S _ IN of the selection module 110 includes a first signal input terminal S _ IN1 and a second signal input terminal S _ IN2, wherein the first signal input terminal S _ IN1 is connected to the USB signal output terminal of the SOC chip 210 for receiving the USB signal output from the USB signal output terminal of the SOC chip 210, and the second signal input terminal S _ IN2 is connected to the UART signal output terminal of the SOC chip 210 for receiving debug information output from the UART signal output terminal of the SOC chip 210.
The control terminal S _ S of the selection module 110 is connected to the first control signal output terminal C1 for receiving the first control signal, and the selection module 110 is used for transmitting the signal inputted from the first signal input terminal S _ IN1 or the second signal input terminal S _ IN2 to the switch module 120 according to the first control signal. In this embodiment, the first control signal includes a first level state or a second level state; when the first control signal is IN the first level state, the selection module 110 transmits the USB signal received by the first signal input terminal S _ IN1 to the adaptor module 120; when the first control signal is IN the second level state, the selection module 110 transmits the UART signal received by the second signal input terminal S _ IN2 to the adaptor module 120.
The switch module 120 includes a first switch unit T1 and a second switch unit T2, wherein an input terminal T1_ IN of the first switch unit T1 is connected to an output terminal S _ OUT of the selection module 110; the output end T1_ OUT of the first transit unit T1 is connected with the USB interface 220; the first switch unit T1 further includes a control terminal T1_ S, T1_ S connected to the first control signal output terminal C1 of the switching control module 130 for receiving the first control signal of the switching control module 130.
The first switching unit T1 is used for enabling according to the first control signal, completing the switching and transmission of the signal. When the first control signal is IN the second level state, the selection module 110 transmits the UART signal received by the second signal input terminal S _ IN2 to the adaptor module 120, and the first adaptor unit T1 enables to work when the first control signal is IN the second level state, and converts the UART signal transmitted by the selection module 110 into a converted USB signal for output through the USB interface 220.
Similarly, the input terminal T2_ IN of the second pass unit T2 is connected to the output terminal S _ OUT of the selection module 110; the output end T2_ OUT of the second transit unit T2 is connected with the USB interface 220; the second switch unit T2 further includes a control terminal T2_ S, and the control terminal T2_ S is connected to the second control signal output terminal C2 of the switch control module 130 for receiving the second control signal of the switch control module 130.
The second switching unit T2 is used for enabling according to the second control signal, and completing the signal transmission. When the second control signal is IN the second level state, i.e. when the first control signal is IN the first level state, the selection module 110 transmits the USB signal received by the first signal input terminal S _ IN1 to the adaptor module 120; the second switch unit T2 is enabled when the second control signal is in the second level state, and transmits the USB signal transmitted by the selection module 110 to the USB interface 220 for output through the USB interface 220.
It can be understood that the level state of the first control signal is opposite to the level state of the second control signal, therefore, when the first control signal is in the second level state, the second control signal is in the first level state, the first converting unit T1 is enabled, the second converting unit T2 is not enabled, and the USB interface 220 only outputs debug information converted by the first converting unit T1. When the second control signal is in the second level state, the first control signal is in the first level state, the first converting unit T1 is not enabled, the second converting unit T2 is enabled, the USB interface 220 outputs only the normal communication information, and due to the relevance between the first control signal and the second control signal, only the level state of one of the first control signal or the second control signal needs to be controlled, so that the type of information output by the USB interface 220 can be controlled.
In this embodiment, the level states of the first control signal and the second control signal are generated by different on/off states of the switch K, and in other embodiments of this embodiment, the level states may also be generated by a system motherboard through software, which is not limited in this embodiment.
The utility model also provides an electronic equipment (not shown in the figure), electronic equipment includes SOC chip 210, USB interface 220 and foretell signal switching device 100, wherein, SOC chip 210 includes USB signal output part UART signal output part, this signal switching device 100 all is connected with USB signal output part and UART signal output part, this signal switching device 100 still is connected with USB interface 220, be used for realizing both can transmitting conventional USB communication information through USB interface 220, can transmit electronic equipment's debug information through USB interface 220 again.
To sum up, the utility model provides a signal switching device and electronic equipment, signal switching device includes: the switching control module comprises a selection module, a switching control module and a switching module. The selection module comprises a signal input end and a signal output end, the signal input end of the selection module is connected with the SOC chip, the signal output end of the selection module is connected with the switching module, the selection module further comprises a control end, and the control end of the selection module is connected with the switching control module. The selection module is used for transmitting a signal output by the USB signal output end or the UART signal output end to the switching module according to a control signal of the switching control module, wherein the signal output by the USB signal output end is USB communication information, and the signal output by the UART signal output end is debug information of a system. The signal input end of the switching module is connected with the signal output end of the selection module, the signal output end of the switching module is connected with the USB interface, the control end of the switching module is connected with the switching control module, and the switching module is used for converting the signal output by the selection module into a USB signal according to the control signal of the switching control module so as to switch the USB signal to the USB interface for output. For example, when the selection module transmits the signal output by the USB signal output end to the switching module, the switching module directly transmits the signal output by the USB signal output end to the USB interface for output, and when the selection module transmits the signal output by the UART signal output end to the switching module, the switching module converts the signal into a USB signal and then transmits the USB signal to the USB interface for output, so that the USB interface can transmit both conventional USB communication information and debug information. The switching control module is used for generating a control signal and transmitting the control signal to the selection module and the switching module so that the selection module and the switching module work in a preset mode according to the control signal; for example, the control selection module transmits the signal output by the USB signal output end or the UART signal output end to the switching module, and controls the switching module to convert or transmit the signal. Through setting up selection module, switching module and switching control module, can realize that the USB interface both can transmit conventional USB signal, also can transmit debug information. In the conventional use process, the USB signal of the SOC chip can be selectively transmitted to the USB interface for output, when debug information of the SOC chip needs to be acquired, a UART signal (namely the debug information) can be selectively transmitted to the USB interface for output, so that the debug information of the electronic equipment can be acquired by utilizing the existing USB interface of the equipment, the equipment does not need to be dismounted, one port has multiple purposes, and the problem detection or the test on the electronic equipment is facilitated.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A signal switching device is characterized in that the signal switching device is applied to electronic equipment, the electronic equipment comprises an SOC chip and a USB interface, and the SOC chip comprises a USB signal output end and a UART signal output end; the signal switching device comprises: the switching control module is used for switching the switching control module;
the signal input end of the selection module is connected with the SOC chip, and the control end of the selection module is connected with the switching control module;
the signal input end of the switching module is connected with the signal output end of the selection module, the signal output end of the switching module is connected with the USB interface, and the control end of the switching module is connected with the switching control module;
the switching control module is used for generating a control signal and transmitting the control signal to the selection module and the switching module;
the selection module is used for transmitting the USB signal output by the USB signal output end or the UART signal output by the UART signal output end to the switching module according to the control signal of the switching control module;
the switching module is used for converting the UART signal output by the selection module into a conversion USB signal according to the control signal of the switching control module so as to switch the conversion USB signal to the USB interface for output; the switching module is further configured to switch the USB signal output by the selection module to the USB interface for output according to the control signal of the switching control module.
2. The signal switching device according to claim 1, wherein the switching control module comprises a first control signal output terminal and a second control signal output terminal;
the first control signal output end is used for outputting the first control signal so that the switching module outputs the converted USB signal to the USB interface;
the second control signal output end is used for outputting the second control signal so that the switching module outputs the USB signal to the USB interface.
3. The signal adapter of claim 2, wherein the signal input terminal of the selection module comprises a first signal input terminal and a second signal input terminal, the first signal input terminal is connected to the USB signal output terminal, and the second signal input terminal is connected to the UART signal output terminal;
the control end of the selection module is used for receiving a first control signal, and the selection module is used for transmitting a signal accessed by the first signal input end or the second signal input end to the switching module according to the first control signal.
4. The signal transfer device of claim 3, wherein the first control signal comprises a first level state or a second level state;
when the first control signal is in a first level state, the selection module transmits the USB signal received by the first signal input end to the switching module;
when the first control signal is in a second level state, the selection module transmits the UART signal received by the second signal input terminal to the switching module.
5. The signal transfer device of claim 4, wherein the transfer module comprises a first transfer unit;
the input end of the first switching unit is connected with the output end of the selection module;
the output end of the first switching unit is connected with the USB interface;
the first switching unit is also connected with the first control signal output end to receive a first control signal of the switching control module;
the first switching unit is used for converting the UART signal transmitted by the selection module into the conversion USB signal when the first control signal is in a second level state, so as to output the conversion USB signal through the USB interface.
6. The signal transfer device of claim 4, wherein the transfer module further comprises a second transfer unit;
the input end of the second switching unit is connected with the output end of the selection module;
the output end of the second switching unit is connected with the USB interface;
the second switching unit is also connected with the second control signal output end to receive a second control signal of the switching control module;
and the second switching unit is used for transmitting the USB signal transmitted by the selection module to the USB interface to be output through the USB interface when the second control signal is in a second level state.
7. The signal switching device as claimed in claim 6, wherein the first control signal output terminal is connected to the second control signal output terminal through an inverter, the first control signal and the second control signal have opposite level states, and when the first control signal is in the first level state, the second control signal is in the second level state; when the first control signal is in the second level state, the second control signal is in the first level state.
8. The signal switching device according to claim 7, wherein the switching control module further comprises a switch, a first resistor and a second resistor, a first end of the switch is connected to a power supply, a second end of the switch is grounded via the first resistor and the second resistor in sequence, a sampling point is formed between the first resistor and the second resistor, and the first control signal output end is connected to the sampling point to use a signal at the sampling point as the first control signal.
9. The signal switching device according to claim 8, wherein when the switch is turned off, the sampling point is at a low level, the first control signal is at the first level state, and the second control signal is at the second level state;
when the switch is closed, the sampling point is at a high level, the first control signal is at the second level state, and the second control signal is at the first level state.
10. An electronic device, characterized in that the electronic device comprises the signal switching device according to any one of claims 1 to 9.
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| CN202020239686.0U CN211349341U (en) | 2020-03-02 | 2020-03-02 | Signal switching device and electronic equipment |
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| CN202020239686.0U CN211349341U (en) | 2020-03-02 | 2020-03-02 | Signal switching device and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112418367A (en) * | 2020-11-19 | 2021-02-26 | 努比亚技术有限公司 | Price tag base station multi-serial port switching debugging device, debugging method and computer readable storage medium |
| CN113868169A (en) * | 2021-08-31 | 2021-12-31 | 浪潮(山东)计算机科技有限公司 | Computer equipment and signal processing system thereof |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112418367A (en) * | 2020-11-19 | 2021-02-26 | 努比亚技术有限公司 | Price tag base station multi-serial port switching debugging device, debugging method and computer readable storage medium |
| CN113868169A (en) * | 2021-08-31 | 2021-12-31 | 浪潮(山东)计算机科技有限公司 | Computer equipment and signal processing system thereof |
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