CN215006660U - Vehicle-mounted subscriber identity module circuit - Google Patents
Vehicle-mounted subscriber identity module circuit Download PDFInfo
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- CN215006660U CN215006660U CN202121184313.9U CN202121184313U CN215006660U CN 215006660 U CN215006660 U CN 215006660U CN 202121184313 U CN202121184313 U CN 202121184313U CN 215006660 U CN215006660 U CN 215006660U
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Abstract
The utility model provides a vehicle-mounted user identification card circuit, which relates to the technical field of vehicle-mounted multimedia equipment and comprises a main control module; the first subscriber identity module and the second subscriber identity module are electrically connected with the main control module; subscriber identity module switches the selection module, is used for electric connection first subscriber identity module with second subscriber identity module, the utility model discloses a subscriber identity module switches the selection module, adopts neotype circuit design to and walk the selection constraint of line and device to circuit board PCB, with first subscriber identity module and the integration of second subscriber identity module together to with interference signal fall to minimumly, can adapt to the purpose of different product forms and different application scenes, reduced the cost of hardware development and maintenance simultaneously, be convenient for hardware management and maintenance, the realization is based on vehicle-mounted multimedia equipment's low-cost SIM card is used.
Description
Technical Field
The utility model relates to an on-vehicle multimedia equipment technical field especially relates to an on-vehicle subscriber identity module circuit.
Background
A Long Term Evolution (LTE) network is connected as a basic function of a vehicle-mounted multimedia device (vehicle), and a user can perform operations such as internet entertainment and navigation. The SIM card is used as a necessary device for networking, and two installation modes exist at present; one is a Subscriber Identity Module (SIM) card (also called a chip eSIM card) with a built-in SIM card, which is soldered to a circuit board in the form of a chip before the device leaves the factory; the other part is an external SIM card, an SIM card socket is reserved on a host panel when the equipment leaves a factory, and a user can buy a general SIM card of a mobile phone for installation and use by the user from an operator. The two modes have advantages and disadvantages respectively and are suitable for different application scenes respectively.
However, because the application scenarios of the existing vehicle-mounted multimedia device are different, the SIM card circuit usually has two design schemes, i.e., a built-in eSIM card chip and an external SIM card socket, so that hardware workers of a company need to design and maintain two hardware versions, which brings corresponding troubles to hardware management and designers.
SUMMERY OF THE UTILITY MODEL
The utility model provides a vehicle-mounted subscriber identity module card circuit for solve among the prior art SIM card circuit and need adopt different hardware circuit to satisfy the defect of different application scenes, realize that the low-cost SIM card based on vehicle-mounted multimedia equipment is used.
The utility model provides an on-vehicle subscriber identity module circuit, include:
a main control module;
the first subscriber identity module and the second subscriber identity module are electrically connected with the main control module;
and the subscriber identity module switching selection module is used for electrically connecting the first subscriber identity module and the second subscriber identity module.
According to the utility model provides an on-vehicle subscriber identity module card circuit, first subscriber identity module card module is applied to built-in embedded subscriber identity module card, and external subscriber identity module card seat is applied to second subscriber identity module card.
According to the vehicle-mounted subscriber identity module circuit provided by the utility model, the main control module is electrically connected with the first subscriber identity module and the second subscriber identity module through a first signal line; wherein the first signal line is used for transmitting a power signal.
According to the utility model provides a vehicle-mounted subscriber identity module card circuit, first signal line include transmission power signal line, transmission power signal line and the equal electric connection of host system, first subscriber identity module card module and second subscriber identity module card module.
According to the utility model provides an on-vehicle subscriber identity module card circuit, subscriber identity module card switches selection module and includes a plurality of matched resistance of electric connection in first subscriber identity module department.
According to the utility model provides a vehicle-mounted subscriber identity module card circuit, each matching resistance is used for an electrical connection second signal line and a third signal line, second signal line one end and matching resistance electrical connection, the other end and the main control module electrical connection of second signal line, third signal line one end and matching resistance electrical connection, the other end and the second subscriber identity module card module electrical connection of third signal line;
the subscriber identity module card switching selection module, the second signal line and the third signal line are matched for transmitting a reset signal, a clock signal and a bidirectional data signal.
According to the utility model provides a vehicle-mounted subscriber identity module card circuit, the second signal line includes first transmission reset signal line, first clock signal line and first bidirectional data signal line, the third signal line includes second transmission reset signal line, second clock signal line and second bidirectional data signal line, subscriber identity module card switches the selection module and includes resistance R1, resistance R2 and resistance R3;
one end of the first transmission reset signal line is electrically connected with the main control module, the other end of the first transmission reset signal line is electrically connected with the second transmission reset signal line through the resistor R1, the other end of the second transmission reset signal line is electrically connected with the second subscriber identity card module, one end of the first clock signal line is electrically connected with the main control module, the other end of the first clock signal line is electrically connected with the second clock signal line through the resistor R2, the other end of the second clock signal line is electrically connected with the second subscriber identity module, one end of the first bidirectional data signal line is electrically connected with the main control module, the other end of the first bidirectional data signal line is electrically connected with the second bidirectional data signal line through the resistor R3, and the other end of the second bidirectional data signal line is electrically connected with the second subscriber identity module.
According to the utility model provides a vehicle subscriber identity module card circuit, resistance R1, resistance R2 and resistance R3 all set up the pad department at first subscriber identity module card module.
According to the vehicle-mounted subscriber identity module circuit provided by the utility model, the main control module is electrically connected with the second subscriber identity module through a fourth signal line; wherein the fourth signal line is used for transmitting a subscriber identity card detection signal.
According to the utility model provides an on-vehicle subscriber identity module circuit, fourth signal line include subscriber identity module detection signal line, subscriber identity module detection signal line's one end and host system electric connection, subscriber identity module detection signal line's the other end and second subscriber identity module electric connection.
The utility model provides an on-vehicle subscriber identity module card circuit, switch the selection module through the subscriber identity module card, adopt neotype circuit design, and to the circuit board PCB walk the selection restraint of line and device, be in the same place first subscriber identity module card module and the integration of second subscriber identity module card module, be about to two kinds of SIM card schemes integration of built-in SIM card and external SIM card on a hardware circuit board, and again with interference signal fall to minimumly, the purpose that a hardware circuit board can the different product forms of adaptation and different application scenes, the cost of hardware development and maintenance has been reduced simultaneously, be convenient for hardware management and maintenance, the realization is used based on the low-cost SIM card of on-vehicle multimedia equipment.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a case where an application scenario is a built-in SIM card in the prior art;
fig. 2 is a schematic structural diagram of an application scenario of an external SIM card in the prior art;
fig. 3 is a first schematic structural diagram of the vehicle-mounted subscriber identity module card circuit provided by the present invention;
fig. 4 is a schematic structural diagram of the vehicle-mounted subscriber identity module card circuit according to the present invention.
Reference numerals:
100: a main control module; 200: a first subscriber identity card module;
300: a first subscriber identity card module; 400: a subscriber identity module switching selection module;
500: a first signal line; 600: a second signal line; 700: a third signal line;
800: and a fourth signal line.
Detailed Description
To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The following describes the vehicle-mounted subscriber identity module circuit of the present invention with reference to fig. 3 and 4, and the vehicle-mounted subscriber identity module circuit includes:
the system comprises a main control module 100, a first subscriber identity module 200, a second subscriber identity module 300 and a subscriber identity switching selection module 400, wherein the first subscriber identity module 200 and the second subscriber identity module 300 are electrically connected with the main control module 100, and the subscriber identity switching selection module 400 is used for electrically connecting the first subscriber identity module 200 and the second subscriber identity module 300.
The utility model provides an on-vehicle subscriber identity module circuit passes through subscriber identity module card switching selection module 400, adopt neotype circuit design, and to the selection restraint of walking line and device to circuit board PCB, be in the same place first subscriber identity module 200 and second subscriber identity module 300 integration, be about to two kinds of SIM card schemes integration of built-in SIM card and external SIM card on a hardware circuit board, and again with interference signal fall to minimumly, the purpose that a hardware circuit board can the different product forms of adaptation and different application scenes, the cost of hardware development and maintenance has been reduced simultaneously, be convenient for hardware management and maintenance, the realization is based on the low-cost SIM card of on-vehicle multimedia equipment uses.
In this embodiment, the first subscriber identity module 200 is applied to a built-in embedded subscriber identity module, that is, the first subscriber identity module 200 is a built-in SIM card scheme (built-in chip SIM card), and the second subscriber identity module 300 is applied to an external subscriber identity module card socket, that is, the second subscriber identity module 300 is an external SIM card scheme (external SIM card socket).
Referring to fig. 1 and fig. 2, which are schematic structural diagrams of an application scenario of a built-in SIM card and an external SIM card in the prior art respectively, generally valid signals of a circuit of the SIM card include a power signal SIM _ VCC, a reset signal SIM _ RST, a clock signal SIM _ CLK, and a bidirectional DATA signal SIM _ DATA, and a SIM card detection signal SIM _ DET is further provided for the external SIM card holder, so the SIM card detection signal SIM _ DET is separately connected to a main control module to be used for identifying the external SIM card, and for the power signal SIM _ VCC, both the internal patch eSIM card and the external SIM card holder can be shared.
Specifically, in the vehicle-mounted sim card circuit provided by the present invention, the main control module 100 is electrically connected to the first sim card module 200 and the second sim card module 300 through the first signal line 500; wherein the first signal line 500 is used for transmitting a power supply signal SIM _ VCC.
The first signal line 500 includes a transmission power signal line electrically connected to the main control module 100, the first subscriber identity card module 200, and the second subscriber identity card module 300.
The main control module 100 is electrically connected to the second subscriber identity module 300 through a fourth signal line 800; wherein the fourth signal line 800 is used for transmitting a SIM card detection signal SIM _ DET.
The fourth signal line 800 includes a sim card detection signal line, one end of which is electrically connected to the main control module 100, and the other end of which is electrically connected to the second sim card module 300.
For the other three valid signal reset signals SIM _ RST, the clock signal SIM _ CLK, and the bidirectional DATA signal SIM _ DATA, when the first subscriber identification card module 200 and the second subscriber identification card module 300 are integrated together, switching selection is required, and meanwhile, considering signal integrity, the three key signals cannot be directly and electrically connected to the first subscriber identification card module 200 and the second subscriber identification card module 300 from the main control module 100, so that mutual interference between signals is easily caused, and in a serious case, the first subscriber identification card module 200 and the second subscriber identification card module 300 cannot normally operate.
Therefore, it is necessary to reduce the trace length of the signal fork as much as possible, and in this embodiment, the sim switching selection module 400 includes a plurality of matching resistors electrically connected to the first sim module 200. In the present embodiment, the matching resistor is mounted at the pad of the first subscriber identification card module 200. Each matching resistor is used for electrically connecting a second signal line 600 and a third signal line 700, one end of the second signal line 600 is electrically connected with the matching resistor, the other end of the second signal line 600 is electrically connected with the main control module 100, one end of the third signal line 700 is electrically connected with the matching resistor, and the other end of the third signal line 700 is electrically connected with the second subscriber identity module 300; the SIM switch selection module 400, the second signal line 600 and the third signal line 700 cooperate to transmit a reset signal SIM _ RST, a clock signal SIM _ CLK and a bidirectional DATA signal SIM _ DATA.
The second signal line 600 includes a first transmission reset signal line, a first clock signal line, and a first bidirectional data signal line, the third signal line 700 includes a second transmission reset signal line, a second clock signal line, and a second bidirectional data signal line, and the sim card switching selection module 400 includes a resistor R1, a resistor R2, and a resistor R3;
one end of the first transmission reset signal line is electrically connected to the main control module 100, the other end of the first transmission reset signal line is electrically connected to the second transmission reset signal line through a resistor R1, the other end of the second transmission reset signal line is electrically connected to the second subscriber identity card module 300, one end of the first clock signal line is electrically connected to the main control module 100, the other end of the first clock signal line is electrically connected to the second clock signal line through a resistor R2, the other end of the second clock signal line is electrically connected to the second subscriber identity card module 300, one end of the first bidirectional data signal line is electrically connected to the main control module 100, the other end of the first bidirectional data signal line is electrically connected to the second bidirectional data signal line through a resistor R3, and the other end of the second bidirectional data signal line is electrically connected to the second subscriber identity card module 300.
Adopt the utility model provides a circuit form in the on-vehicle subscriber identity module card circuit, reset signal SIM _ RST, clock signal SIM _ CLK and two-way DATA signal SIM _ DATA lead to reach paster eSIM card chip (first subscriber identity module 200) pad department earlier through corresponding second signal line 600 after drawing forth from host system 100, place corresponding matched resistance (resistance R1 in figure 4, R2 and R3) nearby after drawing forth from paster eSIM card chip pad, through behind the matched resistance at external SIM card socket department through corresponding third signal line 700 electric connection, thus, no matter which kind of application scene, basically can not have any unnecessary branching to walk the line, realize reducing interference signal to minimumly.
It should be noted that, when using the scene only when being applied to built-in paster eSIM card chip, the utility model provides an in the vehicle subscriber identification card circuit need not weld the matching resistance on the SIM card signal line (resistance R1, R2 and R3 in figure 4) can, when using the scene only for being applied to external SIM cassette, the utility model provides an in the vehicle subscriber identification card circuit as long as do not weld the interface that built-in paster eSIM card chip corresponds can.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled 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 depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. An in-vehicle subscriber identity module circuit, comprising:
a master control module (100);
a first subscriber identity module (200) and a second subscriber identity module (300) which are electrically connected with the main control module (100);
and the subscriber identity card switching selection module (400) is used for electrically connecting the first subscriber identity card module (200) and the second subscriber identity card module (300).
2. The vehicle subscriber identity card circuit according to claim 1, wherein the first subscriber identity card module (200) is applied to an internal embedded subscriber identity card, and the second subscriber identity card module (300) is applied to an external subscriber identity card socket.
3. The on-board SIM card circuit of claim 2, wherein the main control module (100) is electrically connected to the first SIM card module (200) and the second SIM card module (300) via a first signal line (500); wherein the first signal line (500) is used for transmitting a power supply signal.
4. The on-board subscriber identity module circuit according to claim 3, wherein the first signal line (500) comprises a transmission power signal line, and the transmission power signal line is electrically connected to the main control module (100), the first subscriber identity module (200) and the second subscriber identity module (300).
5. The on-board subscriber identity card circuit according to claim 2, wherein the subscriber identity card switch selection module (400) comprises a plurality of matching resistors electrically connected at the first subscriber identity card module (200).
6. The vehicle-mounted subscriber identity module card circuit according to claim 5, wherein each matching resistor is used for electrically connecting a second signal line (600) and a third signal line (700), one end of the second signal line (600) is electrically connected with the matching resistor, the other end of the second signal line (600) is electrically connected with the main control module (100), one end of the third signal line (700) is electrically connected with the matching resistor, and the other end of the third signal line (700) is electrically connected with the second subscriber identity module card module (300);
the subscriber identity card switching selection module (400), the second signal line (600) and the third signal line (700) are matched for transmitting a reset signal, a clock signal and a bidirectional data signal.
7. The in-vehicle subscriber identity card circuit according to claim 6, wherein the second signal line (600) includes a first transmission reset signal line, a first clock signal line, and a first bidirectional data signal line, the third signal line (700) includes a second transmission reset signal line, a second clock signal line, and a second bidirectional data signal line, and the subscriber identity card switching selection module (400) includes a resistor R1, a resistor R2, and a resistor R3;
one end of the first transmission reset signal line is electrically connected with the main control module (100), the other end of the first transmission reset signal line is electrically connected with the second transmission reset signal line through the resistor R1, the other end of the second transmission reset signal line is electrically connected with the second subscriber identity module (300), one end of the first clock signal line is electrically connected with the main control module (100), the other end of the first clock signal line is electrically connected with the second clock signal line through the resistor R2, the other end of the second clock signal line is electrically connected with the second subscriber identity module (300), one end of the first bidirectional data signal line is electrically connected with the main control module (100), the other end of the first bidirectional data signal line is electrically connected with the second bidirectional data signal line through the resistor R3, and the other end of the second bidirectional data signal line is electrically connected with the second subscriber identity module (300).
8. The in-vehicle subscriber identity card circuit of claim 7, wherein the resistor R1, the resistor R2, and the resistor R3 are all disposed at pads of the first subscriber identity card module (200).
9. The vehicle subscriber identity card circuit according to claim 2, wherein the main control module (100) is electrically connected with the second subscriber identity card module (300) through a fourth signal line (800); wherein the fourth signal line (800) is used for transmitting a subscriber identity card detection signal.
10. The on-board SIM card circuit of claim 9, wherein the fourth signal line (800) comprises a SIM card detection signal line, one end of the SIM card detection signal line is electrically connected to the host module (100), and the other end of the SIM card detection signal line is electrically connected to the second SIM card module (300).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121184313.9U CN215006660U (en) | 2021-05-28 | 2021-05-28 | Vehicle-mounted subscriber identity module circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121184313.9U CN215006660U (en) | 2021-05-28 | 2021-05-28 | Vehicle-mounted subscriber identity module circuit |
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| CN215006660U true CN215006660U (en) | 2021-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114003046A (en) * | 2021-12-30 | 2022-02-01 | 智道网联科技(北京)有限公司 | Positioning circuit supporting debugging, debugging control method, electronic device and vehicle |
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2021
- 2021-05-28 CN CN202121184313.9U patent/CN215006660U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114003046A (en) * | 2021-12-30 | 2022-02-01 | 智道网联科技(北京)有限公司 | Positioning circuit supporting debugging, debugging control method, electronic device and vehicle |
| CN114003046B (en) * | 2021-12-30 | 2022-03-25 | 智道网联科技(北京)有限公司 | Positioning circuit supporting debugging, debugging control method, electronic device and vehicle |
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