CN217879468U - Insertion detection circuit, POS host and POS equipment - Google Patents
Insertion detection circuit, POS host and POS equipment Download PDFInfo
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- CN217879468U CN217879468U CN202221978372.8U CN202221978372U CN217879468U CN 217879468 U CN217879468 U CN 217879468U CN 202221978372 U CN202221978372 U CN 202221978372U CN 217879468 U CN217879468 U CN 217879468U
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Abstract
The application belongs to the technical field of POS terminals, and particularly relates to an insertion detection circuit, a POS host and POS equipment, wherein the insertion detection circuit comprises a power supply module, a detection module and a control module, the detection module is used for outputting a starting signal to the power supply module at a first output end of the detection module and outputting an indicating signal to the control module at a second output end of the detection module when the detection end of the detection module is connected with an external module; the power supply module is used for providing power supply voltage for the peripheral module when receiving the starting signal; and the control module is used for selecting whether to output a control signal to the detection module according to the preset condition when receiving the indication signal so as to control whether the detection module outputs a starting signal. The problem that the traditional POS host cannot automatically supply power to the peripheral module when the peripheral module is plugged is solved.
Description
Technical Field
The application belongs to the technical field of POS terminals, and particularly relates to an insertion detection circuit, a POS host and POS equipment.
Background
A Point Of Sale (POS) machine forms an ecological chain form, namely a plurality Of plug-and-play function modules are hung outside one POS host machine, and even relevant function modules are marked and matched. Therefore, after the peripheral module is connected to the host, the POS host can automatically recognize and supply power to the peripheral module even when the POS host is in a power-off state, thereby ensuring the safe life thereof.
SUMMERY OF THE UTILITY MODEL
The application mainly aims to provide an insertion detection circuit, a POS host and POS equipment, and aims to solve the problem that a traditional POS host cannot independently supply power to a peripheral module when the peripheral module is plugged in a shutdown state.
A first aspect of an embodiment of the present application provides an insertion detection circuit, including a power supply module, a detection module, and a control module; the detection module is used for outputting a starting signal to the power supply module at the first output end and outputting an indicating signal to the control module at the second output end when the detection module is connected with the peripheral module; the power supply module is used for providing power supply voltage for the peripheral module when receiving the starting signal; and the control module is used for outputting a control signal to the detection module according to preset selection when receiving the indication signal so as to control the detection module to output the starting signal.
In one embodiment, when the detection module is not connected with the peripheral module, the voltage value of the detection end of the detection module is within a safe range.
In one embodiment, the detection module includes a first pull-up resistor, a second pull-up resistor, and a first switch tube, a first end of the first pull-up resistor and a first end of the second pull-up resistor are respectively connected to a voltage source, a second end of the first pull-up resistor is connected to a control end of the first switch tube and serves as a detection end of the detection module, a second end of the second pull-up resistor is connected to a first conduction end of the first switch tube and serves as a first output end of the detection module, and a second conduction end of the first switch tube is grounded.
In one embodiment, the detection module further includes a start control branch, a first end of the start control branch is connected to the first output end of the detection module, a second end of the start control branch is grounded, a control end of the start control branch is used for accessing the control signal, and the start control branch is used for enabling the detection module to output the start signal when receiving the control signal.
In one embodiment, the start control branch includes a second switch tube, a first conduction end of the second switch tube is connected to the first output end of the detection module, a second conduction end of the second switch tube is grounded, and a control end of the second switch tube is used as a control end of the detection module to access the control signal.
In one embodiment, the detection module further includes an indication branch, a first end of the indication branch is connected to a voltage source, a second end of the indication branch is grounded, a control end of the indication branch is connected to a detection end of the detection module, and the indication branch is configured to output an indication signal at an output end of the indication branch when the peripheral module is connected to the detection end of the detection module.
In one embodiment, the indication branch comprises a third switching tube and a third pull-up resistor, a first end of the third pull-up resistor is connected to a voltage source, a second end of the third pull-up resistor is connected to a first conduction end of the third switching tube, a second conduction end of the third switching tube is grounded, a control end of the third switching tube is connected to a detection end of the detection module through a resistor, and a second end of the third pull-up resistor is used as an output end of the indication branch for outputting the indication signal.
In one embodiment, the power supply module includes a voltage stabilizing chip and a current limiting protection chip, an input end of the voltage stabilizing chip is used for accessing an input voltage, an output end of the voltage stabilizing chip is connected with an input end of the current limiting protection chip, an output end of the current limiting protection chip is used for outputting the power supply voltage, an enable end of the voltage stabilizing chip is connected with a first output end of the detection module, the voltage stabilizing chip is started when receiving the start signal, and the current limiting protection chip is used for limiting the power supply voltage within a preset range.
A second aspect of the embodiments of the present application provides a POS host, where the POS host is provided with at least one socket, where the socket is used to plug in a peripheral module, and the POS host includes the insertion detection circuit provided by the first aspect of the embodiments of the present application.
A third aspect of an embodiment of the present application provides a POS device, including the POS host provided in the second aspect of the embodiment of the present application.
According to the insertion detection circuit provided by the embodiment of the application, when the peripheral module is in plug-in connection with the detection module, the detection module outputs the starting signal to the power supply module, the power supply module supplies power to the peripheral module, and the insertion detection and automatic electrification of the peripheral module are realized. When the indication signal is received through the control module, whether the control signal is output to the detection module according to preset selection or not is performed, whether the detection module outputs the starting signal or not is controlled, whether the peripheral module is independently controlled to be powered on or not is achieved, the insertion detection circuit of the embodiment of the application can achieve the effect that when the peripheral module is inserted, the peripheral module is powered on normally through automatic power supply, the power on and off of the peripheral module can be controlled through the control module in real time, and the problem that when the peripheral module is inserted in a traditional POS host, the peripheral module cannot be automatically powered on is solved.
Drawings
FIG. 1 is a schematic diagram of an insertion detection circuit according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a detection module according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit diagram of a power supply module according to an embodiment of the present application;
fig. 4 is a schematic diagram illustrating a principle of connection between a POS host and a peripheral module according to an embodiment of the present application;
fig. 5 is a schematic diagram of a POS device according to an embodiment of the present disclosure.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings to facilitate the description of the application and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be constructed in operation as a limitation of the application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, a schematic diagram of an insertion detection circuit 100 according to a first aspect of the present embodiment is provided, where the insertion detection circuit 100 includes a detection module 110, a power supply module 120, and a control module 130.
The detection module 110 has a detection end for connecting with the peripheral module 200, a control end of the detection module 110 is connected with the control module 130, a first output end of the detection module 110 is connected with a control end of the power supply module 120, a second output end of the detection module 110 is connected with the control module 130, and the detection module 110 is configured to output a start signal to the power supply module 120 at the first output end and output an indication signal to the control module 130 at the second output end when the detection end is connected with the peripheral module 200. The power supply module 120 is connected to the peripheral module 200, and the power supply module 120 is configured to provide a power supply voltage to the peripheral module 200 when receiving the start signal, so that the peripheral module 200 can be normally powered on.
The control module 130 is configured to select whether to output a control signal to the detection module 110 according to a preset when receiving the indication signal, so as to control whether the detection module 110 outputs the start signal, and it can be understood that after the control module 130 receives the indication signal of the detection module 110, the control module 130 considers that the peripheral module 200 is plugged in the detection module 110, and at this time, the control module 130 may select whether to output the control signal according to a user preset so as to control whether the detection module 110 outputs the start signal, except that the detection module 110 automatically detects that the peripheral module 200 is plugged in and is powered on autonomously, the control on the detection module 110 alone can be implemented, so as to control whether the peripheral module 200 is powered on normally. For example, after the peripheral module 200 is plugged in, the peripheral module 200 is powered on for a period of time and then sleeps, and at this time, the control module 130 may control the power supply module 120 to stop supplying power to the peripheral module 200 through the detection module 110, so as to save power and improve circuit security.
In the insertion detection circuit 100 provided in the first aspect of the embodiment of the present application, when the peripheral module 200 is connected to the detection module 110 in an inserting manner, the detection module 110 outputs a start signal to the power supply module 120, and the power supply module 120 supplies power to the peripheral module 200, so that the insertion detection and the automatic power-on of the peripheral module 200 are realized. When the control module 130 receives the indication signal, whether to output the control signal to the detection module 110 according to the preset selection or not is performed, so as to control whether the detection module 110 outputs the start signal or not, and whether to independently control whether the peripheral module 200 is powered on or not is realized, the insertion detection circuit 100 of the embodiment of the application can realize that when the peripheral module 200 is inserted, the peripheral module 200 is powered on normally by automatic power supply, and the power on and off of the peripheral module 200 can be controlled by the control module 130 in real time, so that the problem that the peripheral module 200 cannot be automatically powered when the peripheral module 200 is plugged in a traditional POS host is solved.
In one embodiment, when the peripheral module 200 is not connected to the detection module 110, the voltage value of the detection terminal of the detection module 110 is within a safe range, for example, the voltage value of the detection terminal is 600mV, and only the voltage of the detection terminal of the connection terminal between the insertion detection circuit 100 and the peripheral module 200 is 600mV, so that the safety of the insertion detection circuit 100 is improved.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a detection module 110 according to an embodiment of the present disclosure, in an embodiment, the detection module 110 includes a first pull-up resistor R1, a second pull-up resistor R2, and a first switch tube Q1, a first end of the first pull-up resistor R1 and a first end of the second pull-up resistor R2 are respectively connected to a voltage source VCC, a second end of the first pull-up resistor R1 is connected to a control end of the first switch tube Q1 and is used as a detection end DET of the detection module 110, a second end of the second pull-up resistor R2 is connected to a first conduction end of the first switch tube Q1 and is used as a first output end POWER _ EN of the detection module 110, and a second conduction end of the first switch tube Q1 is grounded. It can be understood that the peripheral module 200 has a pull-down resistor, when the peripheral module 200 is not connected to the detection module 110, the voltage of the voltage source VCC is pulled up through the first pull-up resistor R1, so that the first switch tube Q1 is turned on, and at this time, the level of the first output terminal POWER _ EN of the detection module 110 is pulled down, and the POWER supply module 120 does not work after receiving the enable signal. When the peripheral module 200 is connected to the detection module 110, the voltage of the voltage source VCC is connected to the ground through the first pull-up resistor R1 and the pull-down resistor of the peripheral module 200, the pull-down resistor of the peripheral module 200 is, for example, a resistor of 1K Ω, so that the voltage of the control terminal of the first switch tube Q1 is pulled down, the first switch tube Q1 is turned off, at this time, the voltage of the voltage source VCC is pulled up through the second pull-up resistor R2, the level of the first output terminal POWER _ EN of the detection module 110 is a high level, that is, the start signal is output at the first output terminal POWER _ EN of the detection module 110, that is, the start signal is a high level. It can be understood that, in some embodiments, the level of the control terminal of the first switch Q1 may be set according to the type of the first switch Q1, and it is only required that the first switch Q1 is turned on when the peripheral module 200 is not connected to the detection module 110, and the first switch Q1 is turned off when the peripheral module 200 is connected to the detection module 110.
Further, referring to fig. 2, a resistor R6 is further connected between the detection terminal DET and the control terminal of the first switching tube Q1, and a capacitor C2 is further connected between the control terminal of the first switching tube Q1 and the second conducting terminal, wherein the resistor R6 is used for limiting the voltage of the control terminal of the first switching tube Q1, so as to prevent the first switching tube Q1 from being broken down by an excessive voltage, and the capacitor C2 is used for suppressing self-oscillation caused by an inter-electrode capacitor of the first switching tube Q1, thereby improving stability.
Referring to fig. 2, in an embodiment, the detection module 110 further includes an enable control branch 111, a first end of the enable control branch 111 is connected to a first output terminal POWER _ EN of the detection module 110, a second end of the enable control branch 111 is grounded, a control end of the enable control branch 111 is used for accessing a control signal, and the enable control branch 111 is used for enabling the detection module 110 to output an enable signal at the first output terminal POWER _ EN thereof when receiving the control signal. By setting the start control branch 111, another mode for controlling whether the power supply module 120 works is provided, so as to separately control the detection module 110, so as to control whether the peripheral module 200 is normally powered on.
Referring to fig. 2, specifically, in an embodiment, the start control branch 111 includes a second switch Q2, a first pass end of the second switch Q2 is connected to the first output end POWER _ EN of the detection module 110, a second pass end of the second switch Q2 is grounded, and a control end of the second switch Q2 is used as the control end OUT _ EN of the detection module 110 for accessing the control signal. When the control terminal OUT _ EN receives that the control signal is a high level, the second switch tube Q2 is turned on, and the voltage of the voltage source VCC is pulled to the ground through the second pull-up resistor R2 and the second switch tube Q2, so that the level at the first output terminal POWER _ EN of the detection module 110 is pulled low, at this time, the detection module 110 does not output a start signal, and the POWER supply module 120 does not operate when receiving the start signal; when the control terminal OUT _ EN receives the control signal at a low level, the second switching tube Q2 is turned off, and at this time, the voltage of the voltage source VCC is pulled up by the second pull-up resistor R2, and the level of the first output terminal POWER _ EN of the detection module 110 is a high level, that is, the first output terminal POWER _ EN of the detection module 110 outputs a start signal, and at this time, the POWER supply module 120 receives the start signal and starts to operate. The control signal may be from the control module 130, and the control terminal OUT _ EN controls whether the second switch Q2 is turned on or off, so as to finally control the power-on and power-off states of the peripheral module 200.
Referring to fig. 2, in an embodiment, the detection module 110 further includes an indication branch 112, a first end of the indication branch 112 is connected to the voltage source VDD, a second end of the indication branch 112 is connected to ground, a control end of the indication branch 112 is connected to the detection end DET of the detection module 110, and the indication branch 112 is configured to output an indication signal at an output end, i.e., the second output end INT of the detection module 110, when the peripheral module 200 is connected to the detection end DET of the detection module 110. The indication branch 112 outputs an indication signal to inform the system including the insertion detection circuit 100 of the embodiment of the plugging status of the peripheral module 200 when the peripheral module 200 is connected to the detection module 110. In an embodiment, the indication signal output by the second output end INT of the detection module 110 is output to the control module 130, where the control module 130 is equivalent to a main control module of a system including the insertion detection circuit 100 of the embodiment.
Referring to fig. 2, in an embodiment, the indication branch 112 includes a third switch Q3 and a third pull-up resistor R3, a first end of the third pull-up resistor R3 is connected to the voltage source VDD, a second end of the third pull-up resistor R3 is connected to a first conducting end of the third switch Q3, a second conducting end of the third switch Q3 is grounded, a control end of the third switch Q3 is connected to the detection end DET of the detection module 110 through a resistor R5, and a second end of the third pull-up resistor Q3 is used as an output end of the indication branch 112, that is, a second output end INT of the detection module 110 for outputting the indication signal. Further, referring to fig. 2, a capacitor C1 is further connected between the control end and the second conducting end of the third switching tube Q3, and the capacitor C1 is used for suppressing self-oscillation caused by the inter-electrode capacitance of the third switching tube Q3, so as to improve stability.
The first switch Q1, the second switch Q2 and the third switch Q3 in the above embodiments may be NPN transistors or MOS transistors. The parameters of the resistor and the capacitor in the above embodiments can be selected according to actual needs.
Referring to fig. 3, in an embodiment, the POWER supply module 120 includes a voltage stabilizing chip U1 and a current limiting protection chip U2, an input end of the voltage stabilizing chip U1 is used for accessing an input voltage, such as a voltage source VCC, an output end of the voltage stabilizing chip U1 is connected to an input end of the current limiting protection chip, an output end of the current limiting protection chip U2 is used for outputting a POWER supply voltage VOUT, an enable end EN of the voltage stabilizing chip U1 is connected to a first output end POWER _ EN of the detection module 110, the voltage stabilizing chip U1 is activated when receiving an activation signal from the detection module 110 to stabilize, boost or step down a voltage of the voltage source VCC, and the current limiting protection chip U2 is used for preventing a POWER supply end of the peripheral module 200 from being short-circuited to cause the abnormal operation of the POWER supply module 120, thereby improving the safety of the insertion detection circuit 100 and enabling the POS host 300 to operate normally. In some embodiments, the current-limiting protection chip U2 is further configured to limit the supply voltage VOUT within a predetermined range, the supply voltage VOUT output by the power supply module 120 during operation is 5V, and the output current is about 2A.
In the insertion detection circuit 100 provided in the first aspect of the embodiment of the present application, when the peripheral module 200 is connected to the detection module 110 in an inserting manner, the detection module 110 outputs a start signal to the power supply module 120, and the power supply module 120 supplies power to the peripheral module 200, so as to implement insertion detection and automatic power-on of the peripheral module 200. When receiving the indication signal, the control module 130 outputs a control signal to the detection module 110 according to a preset selection, so as to control whether the detection module 110 outputs a start signal, and to realize whether the peripheral module 200 is independently controlled to be powered on, the insertion detection circuit 100 according to the embodiment of the present application can realize that when the peripheral module 200 is inserted, the peripheral module 200 is powered on normally by automatic power supply, and can control the peripheral module 200 to be powered on and off in real time through the control module 130, thereby solving the problem that the peripheral module 200 cannot be powered automatically when the peripheral module 200 is plugged in a conventional POS host.
Referring to fig. 4, a POS host 300 according to a second aspect of the present disclosure is provided, the POS host 300 is provided with at least one socket 310, the socket 310 is used for plugging a peripheral module 200, the POS host 300 further includes the insertion detection circuit 100 according to the first aspect of the present disclosure, wherein a detection end of the detection module 110 is connected to the socket 310. In one embodiment, the socket 310 is a USB-C female socket interface. It will be appreciated that the power module 120 of the insertion detection circuit 100 also provides power to the peripheral module 200 through the interface 310.
Referring to fig. 5, a POS device 400 is provided in a third aspect of the embodiment of the present application, the POS device 400 includes a POS host 300 and a plurality of peripheral modules 200 provided in the second aspect of the embodiment of the present application, each of the peripheral modules 200 and the POS host 300 is connected through a plurality of sockets 310, and the number of sockets 310 is equal to the number of peripheral modules 200. Referring to fig. 5, in some embodiments, the peripheral module 200 is, for example, a bluetooth module, a display screen, a printer, a code scanner, or the like.
The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. An insertion detection circuit is characterized by comprising a power supply module, a detection module and a control module;
the detection module is used for outputting a starting signal to the power supply module at the first output end and outputting an indicating signal to the control module at the second output end when the detection module is connected with the peripheral module;
the power supply module is used for providing power supply voltage for the peripheral module when receiving the starting signal;
and the control module is used for selecting whether to output a control signal to the detection module according to a preset condition when receiving the indication signal so as to control whether the detection module outputs the starting signal.
2. The insertion detection circuit of claim 1, wherein a voltage value of a detection terminal of the detection module is within a safe range when the detection module is not connected to the peripheral module.
3. The insertion detection circuit according to claim 1, wherein the detection module includes a first pull-up resistor, a second pull-up resistor, and a first switch tube, a first end of the first pull-up resistor and a first end of the second pull-up resistor are respectively connected to a voltage source, a second end of the first pull-up resistor is connected to a control end of the first switch tube and serves as a detection end of the detection module, a second end of the second pull-up resistor is connected to a first conducting end of the first switch tube and serves as a first output end of the detection module, and a second conducting end of the first switch tube is connected to ground.
4. The insertion detection circuit according to claim 3, wherein the detection module further comprises a start control branch, a first end of the start control branch is connected to the first output terminal of the detection module, a second end of the start control branch is connected to ground, a control terminal of the start control branch is configured to access the control signal, and the start control branch is configured to enable the detection module to output or not output the start signal according to the control signal received.
5. The insertion detection circuit according to claim 4, wherein the start control branch comprises a second switch tube, a first conducting terminal of the second switch tube is connected to the first output terminal of the detection module, a second conducting terminal of the second switch tube is grounded, and a control terminal of the second switch tube serves as a control terminal of the detection module for receiving the control signal.
6. The insertion detection circuit according to claim 3, wherein the detection module further comprises an indication branch, a first terminal of the indication branch is connected to a voltage source, a second terminal of the indication branch is grounded, a control terminal of the indication branch is connected to the detection terminal of the detection module, and the indication branch is configured to output an indication signal at an output terminal thereof when the peripheral module is connected to the detection terminal of the detection module.
7. The insertion detection circuit according to claim 6, wherein the indication branch comprises a third switch and a third pull-up resistor, a first terminal of the third pull-up resistor is connected to a voltage source, a second terminal of the third pull-up resistor is connected to the first conducting terminal of the third switch, a second conducting terminal of the third switch is grounded, a control terminal of the third switch is connected to the detection terminal of the detection module through a resistor, and a second terminal of the third pull-up resistor is used as the output terminal of the indication branch for outputting the indication signal.
8. The insertion detection circuit according to claim 1, wherein the power supply module includes a voltage regulation chip and a current limiting protection chip, an input terminal of the voltage regulation chip is used for accessing an input voltage, an output terminal of the voltage regulation chip is connected with an input terminal of the current limiting protection chip, an output terminal of the current limiting protection chip is used for outputting the power supply voltage, an enable terminal of the voltage regulation chip is connected with the first output terminal of the detection module, and the voltage regulation chip is activated when receiving the activation signal.
9. POS host provided with at least one socket for plugging a peripheral module, characterized in that it comprises an insertion detection circuit according to any one of claims 1 to 8, wherein the detection end of the detection module is connected to the socket.
10. A POS device comprising the POS host of claim 9 and a plurality of peripheral modules, said peripheral modules and said POS host connected through said interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221978372.8U CN217879468U (en) | 2022-07-27 | 2022-07-27 | Insertion detection circuit, POS host and POS equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221978372.8U CN217879468U (en) | 2022-07-27 | 2022-07-27 | Insertion detection circuit, POS host and POS equipment |
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| Publication Number | Publication Date |
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| CN217879468U true CN217879468U (en) | 2022-11-22 |
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| CN202221978372.8U Active CN217879468U (en) | 2022-07-27 | 2022-07-27 | Insertion detection circuit, POS host and POS equipment |
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| Country | Link |
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| CN (1) | CN217879468U (en) |
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Effective date of registration: 20230801 Address after: 518000 Room 401, Building 3, Shenzhen Software Park, Maling Community, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Zhaolong Technology Co.,Ltd. Address before: 401, 402, building 3, Shenzhen Software Park, Nanshan District, Shenzhen City, Guangdong Province Patentee before: PAX COMPUTER TECHNOLOGY (SHENZHEN) Co.,Ltd. |
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