CN220022798U

CN220022798U - Terminal equipment

Info

Publication number: CN220022798U
Application number: CN202320411629.XU
Authority: CN
Inventors: 解聪; 师璐
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-11-14
Anticipated expiration: 2033-02-27

Abstract

The present disclosure relates to a terminal device, including a card switch, a SIM card interface, an ESIM card interface, and a processor, where the card switch is connected to the SIM card interface and the ESIM card interface, respectively, and the processor is electrically connected to the card switch, and the card switch receives a card selection signal sent by the processor, so as to switch to be electrically connected to the SIM card interface or the ESIM card interface. In the method, the card change-over switch which is respectively connected with the SIM card interface and the ESIM card interface is arranged, so that the connection to the selected SIM card interface or ESIM card interface is switched according to the card selection signal sent by the processor, the circuit for switching the SIM card and the ESIM card is simplified, and the cost is saved while the user can conveniently switch the used cards.

Description

Terminal equipment

Technical Field

The disclosure relates to the technical field of electronic equipment, and in particular relates to terminal equipment.

Background

With the development of semiconductor technology, the operation speed of chips in electronic devices such as mobile phones is becoming faster and faster, but the withstand voltage value of the chips is also becoming lower and lower. The lower withstand voltage value results in limitation of the voltage of the electric signal emitted from the chip, and a plurality of circuits for boosting are generally required to be provided in the control circuit, so that the circuits are complicated and the cost is high.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a terminal device.

According to an embodiment of the present disclosure, there is provided a terminal device, including a card switch, a SIM card interface, and an ESIM card interface, where the card switch is connected to the SIM card interface and the ESIM card interface, respectively;

the terminal device further comprises a processor, wherein the processor is electrically connected with the card change-over switch, and the card change-over switch receives a card selection signal sent by the processor so as to be switched to be electrically communicated with the SIM card interface or the ESIM card interface.

Optionally, the terminal device further includes a voltage switching circuit, the processor is electrically connected with an input end of the voltage switching circuit, an output end of the voltage switching circuit is electrically connected with the card switching switch, and the card switching switch is electrically connected with the SIM card interface and the ESIM card interface through different signal paths respectively;

the voltage switching circuit is used for outputting voltage signals corresponding to the signal paths according to different signal paths so as to supply power for the SIM card interface or the ESIM card interface.

Optionally, the terminal device further includes a power supply switch, where the power supply switch is connected to the voltage switching circuit through a power supply switching path, and the power supply switch is configured to send a voltage switching signal corresponding to the signal path to the voltage switching circuit;

the card change-over switch is connected with the power supply change-over switch through a first power supply branch circuit, and the first power supply branch circuit is used for transmitting voltage signals corresponding to the selected SIM card interface or the ESIM card interface.

Optionally, the processor is communicatively connected to the voltage switching circuit through a first signal group signal path; and/or the number of the groups of groups,

the processor comprises a general input/output port, and the card change-over switch is electrically connected with the general input/output port; and/or the number of the groups of groups,

the processor is electrically connected with the power supply change-over switch.

Optionally, the terminal device includes a power supply module, where the power supply module is electrically connected to the voltage switching circuit, and the power supply module provides a preset voltage for an input end of the voltage switching circuit.

Optionally, the terminal device includes a radio frequency module, and the ESIM card interface is integrated with the radio frequency module.

Optionally, the radio frequency module includes an NFC module.

Optionally, the card change-over switch is electrically connected with the radio frequency module through a second power supply branch, and the second power supply branch is connected in parallel with the first power supply branch.

Optionally, the radio frequency module is electrically connected with the SIM card interface through a third power supply branch, and supplies power to the SIM card interface.

Optionally, the radio frequency module is electrically connected with the power supply change-over switch through a fourth power supply branch;

the third power supply branch is connected in parallel with the fourth power supply branch.

Optionally, the terminal device further includes a power supply chip, and the power supply chip is electrically connected with the card change-over switch through a first power supply path and a second power supply path; and/or the number of the groups of groups,

the output end of the voltage switching circuit is in communication connection with the card switching switch through a second signal group signal path; and/or the number of the groups of groups,

the card change-over switch is in communication connection with the SIM card interface through a third signal group signal path; and/or the number of the groups of groups,

the card switch is communicatively coupled to the ESIM card interface via a fourth signal set signal path.

The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects: by arranging the card change-over switch which is respectively connected with the SIM card interface and the ESIM card interface, the connection between the selected SIM card interface and the ESIM card interface is changed over according to the card selection signal sent by the processor, so that the circuit for changing over the SIM card and the ESIM card is simplified, the user can conveniently change over the used card, and the cost is saved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic diagram of a terminal device according to an exemplary embodiment.

Fig. 2 is a schematic diagram of a terminal device shown according to an exemplary embodiment.

Fig. 3 is a schematic diagram of a terminal device according to an exemplary embodiment.

Fig. 4 is a schematic diagram of a terminal device shown according to an exemplary embodiment.

Fig. 5 is a schematic diagram of a terminal device shown according to an exemplary embodiment.

Fig. 6 is a schematic diagram of a terminal device shown according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of apparatus and methods consistent with aspects of the utility model as detailed in the accompanying claims.

In order to solve the above problems, the present disclosure provides a terminal device, where the terminal device includes a card switch, a SIM card interface, and an ESIM card interface, where the card switch is connected to the SIM card interface and the ESIM card interface, respectively, and the terminal device further includes a processor, where the processor is electrically connected to the card switch, and where the card switch receives a card selection signal sent by the processor, so as to switch to be electrically connected to the SIM card interface or the ESIM card interface. In the method, the card change-over switch which is respectively connected with the SIM card interface and the ESIM card interface is arranged, so that the connection to the selected SIM card interface or ESIM card interface is switched according to the card selection signal sent by the processor, the circuit for switching the SIM card and the ESIM card is simplified, and the cost is saved while the user can conveniently switch the used cards.

According to an exemplary embodiment, as shown in fig. 1 to 6, the embodiment of the present disclosure provides a terminal device, which may be, for example, a device with a communication function, such as a smart phone, a smart watch, a tablet computer, a notebook computer, or the like.

In this embodiment, as shown in fig. 1 and 4, the terminal device includes a card switch 30, a SIM card interface 60, and an ESIM card interface (not shown in the drawings). The SIM card interface 60 may be used to place a physical phone card, and the physical phone card in the SIM card interface 60 may be taken out from the terminal device through a card pin, and the number of SIM card interfaces 60 may be one or two. The ESIM card interface is used for electrically connecting with an ESIM card (also called a virtual card), which is a telephone card integrated on a chip of the terminal device, and the ESIM card interface can be integrated on a chip with low frequency of use or low power consumption, such as a power supply chip, a radio frequency module 50, and the like.

In this embodiment, as shown in fig. 1 and 4, the terminal device further includes a processor 10, and the processor 10 is, for example, a core processor (Central Processing Unit, CPU). The processor 10 is electrically connected to the card switch 30, and the card switch 30 receives a card selection signal sent by the processor 10 to switch to be electrically connected to the SIM card interface 60 or the ESIM card interface.

Referring to fig. 1 and 4, the SIM card interface 60 is electrically connected to the card switch 30 through the third signal group signal path 33, and the ESIM card interface (disposed in the radio frequency module 50, described later) is electrically connected to the card switch 30 through the fourth signal group signal path 34, and the card switch 30 can be connected to the SIM card interface 60 or the ESIM card interface according to a user's selection, so that any switching between the SIM card interface 60 and the ESIM card interface is performed through the card switch 30. For example, if the user needs to use the SIM card, the card switch 30 may control the third signal group signal path 33 between the SIM card interface 60 and the card switch 30 to be connected and disconnect the signal path between the ESIM card interface and the card switch 30, so that the signal in the first signal group signal path 11 (described in detail later) is transmitted to the SIM card interface 60, and thus the SIM card can be used. If the user needs to use the ESIM card, the card switch 30 may control the signal path between the ESIM card interface 60 and the card switch 30 to be communicated, and disconnect the signal path between the SIM card interface 60 and the card switch 30, so that the signal in the fourth signal group signal path 34 is transmitted to the ESIM card interface, and thus the ESIM card may be used.

When the SIM card is not in use, the power-off processing is performed on the SIM card interface 60, so that power consumption is saved, and the SIM card interface 60 is prevented from being in a power-on state all the time, so as to prevent the SIM card and the SIM card interface 60 from being damaged when the user suddenly pulls out or inserts the SIM card into the SIM card interface 60.

In the embodiment of the disclosure, the card change-over switch connected with the SIM card interface and the ESIM card interface is arranged, so that the connection to the selected SIM card interface or ESIM card interface is switched according to the card selection signal sent by the processor, the circuit for switching the SIM card and the ESIM card is simplified, and the cost is saved while the user is convenient to switch the used cards.

In an exemplary embodiment, as shown in fig. 1 and 4, the embodiment of the present disclosure provides a terminal device, where the terminal device includes a card switch 30, a SIM card interface 60, and an ESIM card interface, where the card switch 30 is connected to the SIM card interface 60 and the ESIM card interface, respectively, and the terminal device further includes a processor 10, where the processor 10 is electrically connected to the card switch 30, and where the card switch 30 receives a card selection signal sent by the processor 10 to switch between electrically communicating the SIM card interface 60 and the ESIM card interface.

It should be noted that, due to the continuous improvement of the process of the processor 10, the voltage withstand value of the IO interface supported by the processor 10 is continuously changed, and in order to adapt to the change of the voltage withstand value of the processor 10, the IO interface of each electrical device connected to the processor 10 needs to be set to an operating voltage matched with the voltage withstand value of the processor 10. However, the SIM card interface or the ESIM card interface still maintains the working low voltage at 1.8V or 3V due to relatively slow update, and cannot be adapted to the IO interface voltage of the processor 10, and the power supply adapted to the processor 10 needs to be converted into the voltage adapted to the ESIM card interface or the SIM card interface 60 through voltage conversion. The system-on-chip is taken as an example in the embodiment of the disclosure, such as an SM8550 model system-on-chip. For example, the voltage withstand value of the processor 10 of the model SM8550 is 1.2V, but the SIM card interface 60 typically supports 1.8V or 3V of electric signals, the ESIM card interface supports 1.8V of electric signals, and the voltage of the electric signals of the processor 10 is far lower than those of the SIM card interface 60 and the ESIM card interface, so that the electric signals of the processor 10 cannot be effectively transmitted to the SIM card interface 60 or the ESIM card interface, and in the related art, there is a solution using a plurality of voltage switching circuits 20 (such as Level Shift), but using a plurality of voltage switching circuits 20 causes circuit complexity and increases cost.

In this embodiment, as shown in fig. 1 and 4, the terminal device further includes a voltage switching circuit 20, the processor 10 is electrically connected to an input end of the voltage switching circuit 20, an output end of the voltage switching circuit 20 is electrically connected to the card switching switch 30, the card switching switch 30 is electrically connected to the SIM card interface 60 and the ESIM card interface through different signal paths, and the voltage at the output end of the voltage switching circuit 20 is adapted to the SIM card or the ESIM card, so that the voltage switching circuit 20 can output voltage signals corresponding to the signal paths according to the different signal paths to supply power to the SIM card interface 60 or the ESIM card interface. Referring to fig. 1, the signal paths include a third signal group signal path 33 and a fourth signal group signal path 34, the card switch 30 can be electrically connected to the SIM card interface 60 through the third signal group signal path 33, and the card switch 30 can also be electrically connected to the ESIM card interface (the radio frequency module 50 shown in fig. 1) through the fourth signal group signal path 34.

In some embodiments, as shown in fig. 1 and 4, the terminal device further includes a power switch 40, where the power switch 40 is connected to the voltage switching circuit 20 through a power switching path 41, and the power switch 40 is configured to send a voltage switching signal corresponding to the signal path to the voltage switching circuit 20.

Referring to fig. 1 and 4, the card switch 30 is connected to the power switch 40 through the first power supply branch 31, where the first power supply branch 31 is used to transmit a voltage signal corresponding to the selected SIM card interface 60 or ESIM card interface, that is, the power switch 40 may obtain a voltage signal (voltage interval) of the SIM card or ESIM card currently being used, and then the power switch 40 outputs a voltage adjustment signal to the voltage switch circuit 20 through the power switch path 41, so that the voltage switch circuit 20 adjusts a voltage value of the IO interface at an output end thereof, so that the voltage value of the IO interface at the output end matches with an operating voltage of the selected SIM card or ESIM card. For example, if the terminal device is currently enabling an ESIM card with an operating voltage of 1.8V, the card switch 30 may send a control signal indicating that the ESIM card uses a voltage of 1.8V to the power switch 40, and if the voltage at the input end of the voltage switching circuit 20 is lower than 1.8V or higher than 1.8V, the voltage switching circuit 20 performs a step-up process or a step-down process on the voltage parameter at the input end thereof, so that the voltage value of the IO interface at the output end of the voltage switching circuit 20 is adjusted to 1.8V. For another example, when the terminal device is currently starting the SIM card with the operating voltage of 3V, the card switch 30 may send a voltage control signal for the SIM card using the 3V voltage to the power switch 40, and the power switch 40 sends a control signal to the voltage switch circuit 20 through the power switch path 41, so as to notify that the current operating scenario is a SIM card interface operating scenario with the operating voltage of 3V, if the voltage of the IO interface at the input end of the voltage switch circuit 20 is lower than 3V, the voltage switch circuit 20 performs a boosting process so as to boost the voltage at the output end of the voltage switch circuit 20 to 3V, so as to ensure that the signal transmitted to the card switch 30 through the voltage switch circuit 20 can be matched with the operating voltage of the SIM card.

Referring to fig. 1 to 4, the card switch 30 is connected to the power switch 40 through a first power supply branch, and the first power supply branch is used for transmitting a voltage signal corresponding to the selected SIM card interface 60 or ESIM card interface. That is, the power supply switch 40 can indicate an application scenario of the voltage value of the output end of the voltage switching circuit 20, so that the voltage of the output end of the voltage switching circuit 20 can be matched with the voltage of the ESIM card interface or the SIM card interface 60, and the electrical signal sent by the processor 10 can be completely transmitted to the ESIM card interface or the SIM card interface 60.

In one example, after the power switch 40 receives the control signal transmitted by the card switch 30, it determines that the operation scene of the switch-over ESIM card interface is switched to, and the voltage of 1.8V is supported in the operation scene of the ESIM card interface, then the power switch 40 sends the control signal to the voltage switch circuit 20, so that the voltage switch circuit 20 switches the voltage value of the signal input by the input end of the voltage switch circuit to the scene of 1.8V, so that the voltage value of the signal output by the output end of the voltage switch circuit 20 can be matched with the operation scene of the ESIM card interface, and the reliability of signal transmission is improved. It will be appreciated that in addition to the 1.8V scenario supporting operation of the ESIM card interface, a 3V scenario supporting operation of the SIM card interface, a 1.8V scenario supporting operation of the SIM card interface, etc. may be included. The voltage parameters shown in the above respective scenes are only for illustrating the embodiments, and are not limited to what is claimed in the disclosure, and in practical application, the voltage parameters related to the working scene may be set according to the practical situation.

In some embodiments, as shown in fig. 1 and 4, the processor 10 is communicatively coupled to the voltage switching circuit 20 via a first signal group signal path 11. Taking the SM8550 model of the processor 10 as an example, the preset voltage of the input/output (I/O) port of the processor 10 is about 1.2V, and in order to ensure the integrity of signal transmission, the voltage of the IO interface connected to the processor 10 at the input end of the voltage switching circuit 20 is also 1.2V.

As shown in fig. 1 and 4, the processor 10 further includes a General-Purpose input/output (GPIO) port 12, the card switch 30 is electrically connected to the GPIO port 12, signal transmission is performed between the processor 10 and the card switch 30 through the GPIO port 12, and the GPIO port 12 has advantages of low power consumption and simple wiring.

In some embodiments, as shown in fig. 1 and 4, the processor 10 is electrically connected to a power switch 40. For example, the power switch 40 may be connected to the general purpose input/output port 12 of the processor 10. The processor 10 can control the power switch 40, and further can select a switch with a simple structure and a single function as the power switch 40 to reduce the cost.

In some embodiments, as shown in fig. 1 and 4, the terminal device further includes a power supply module (not shown in the drawings), and the power supply module supplies power to the input terminal of the voltage switching circuit 20 through the external power supply path 80. The voltage value provided by the power supply module to the voltage switching circuit 20 is equal to the preset voltage (withstand voltage value) of the processor 10, for example, when the preset voltage of the processor 10 is 1.8V, the power supply module provides 1.8V to the voltage switching circuit 20; when the preset voltage of the processor 10 is 1.2V, the power supply module provides 1.2V to the voltage switching circuit 20.

In some embodiments, as shown in fig. 1 and 4, the terminal device includes a radio frequency module 50, and the esim card interface may be integrated with the radio frequency module 50, and the radio frequency module 50 is, for example, an NFC (Near Field Communication ) chip.

In some embodiments, as shown in fig. 1 and 4, the card switch 30 is electrically connected to the radio frequency module 50 through the second power supply branch 32, and the card switch 30 is electrically connected to the power switch 40 through the first power supply branch 31, wherein the second power supply branch 32 is connected in parallel with the first power supply branch 31. For example, when the terminal device is enabling the ESIM card interface integrated in the radio frequency module 50, the power supply chip 70 can transmit a signal that has been switched to the ESIM card interface to the power supply switching switch 40 through the second power supply branch 32 (l6b_sw2), and the power supply switching switch 40 switches the voltage of its output terminal to 1.8V through the voltage switching circuit 20 through the power supply switching path 41, so that the signal transmitted to the card switching switch 30 through the voltage switching circuit 20 meets the voltage requirement and is adapted to the operating voltage supported by the ESIM card interface. The power supply chip 70 transmits 1.8V to the card switch 30 through the second power supply path 72 (L6B), and further provides 1.8V to the rf module 50 through the second power supply branch 32 to supply power to the ESIM card interface in the rf module 50.

In one example, as shown in fig. 1, the radio frequency module 50 is connected to the SIM card interface 60 through the third power supply branch 51 to connect the power supply chip 70 to the SIM card interface 60, the radio frequency module 50 is electrically connected to the power switch 40 through the fourth power supply branch 52, and the third power supply branch 51 is connected in parallel to the fourth power supply branch 52.

In some embodiments, as shown in fig. 1 and 4, the terminal device further includes a power supply chip 70, where the power supply chip 70 is electrically connected to the card switch 30 through a first power supply path 71 and a second power supply path 72, and the power supply chip 70 is used to supply power to the SIM card interface 60, the ESIM card interface, and the card switch 30, and a model of the power supply chip 70, such as PM8550. The power supply chip 70 may be a power management chip (Power Management Integrated Circuits, PMIC) or the like. The power supply chip 70 supplies power to the card switch 30 through a first power supply path 71 (VBOB) to ensure that the card switch 30 can normally operate, and the power supply chip 70 is electrically connected to the card switch 30 through a second power supply path 72 (L6B), so as to supply power to the radio frequency module 50 and the SIM card interface 60. The voltage value of the default output of the power supply chip 70 through the second power supply path 72 is 1.8V, but the voltage value of the output through the second power supply path 72 may be variable, for example, 1.8V voltage may be output, or 3V voltage may be output.

In some possible embodiments, as shown in fig. 1 to 3, fig. 1 to 3 provide a terminal device, where fig. 2 is a signal transmission schematic diagram when the terminal device uses an ESIM card interface, and fig. 3 is a signal transmission schematic diagram when the terminal device uses a SIM card interface. In this embodiment, the preset voltage of the processor is 1.2V, the esim interface uses 1.8V, and the SIM interface uses 3V as an example.

In one application scenario, when a user switches from a SIM card interface to an ESIM card interface, referring to fig. 2, card switch 30 receives a card switch signal, and card switch 30 disconnects SIMVCC and fourth power supply branch 52 (SIMVCC 2) to stop supplying power to SIM card interface 60, and power supply chip 70 supplies power to the ESIM card interface through second power supply path 72 (L6B), card switch 30, and second power supply branch 32. The card switch 30 delivers 1.8V to the ESIM card interface via a second power supply branch 32 (l6b_sw2). Then, the card switch 30 sends a control signal to the power switch 40 through the first power supply branch 31 (l6b_sw1), where the control signal can characterize that the ESIM interface uses 1.8V voltage, and then the power switch 40 can send an adjustment signal to the voltage switch circuit 20 through the power switch path 41, where the adjustment signal is used to inform the voltage switch circuit 20 that the voltage at the output end needs to be reduced to 1.8V, and the voltage switch circuit 20 boosts the 1.2V voltage at the input end, which is matched with the processor 10, so that the voltage at the output end of the voltage switch circuit 20 is adjusted to 1.8V, and the switching from the SIM card interface to the ESIM card interface is completed.

After switching the ESIM card interface, referring to fig. 2, the flow path of the electrical signal (the dotted line shown in fig. 2) and the voltage of the electrical signal in the terminal device are specifically as follows, the processor 10 sends a 1.2V electrical signal to the input end of the voltage switching circuit 20, the voltage switching circuit 20 boosts the 1.2V electrical signal to 1.8V, and outputs the 1.8V electrical signal to the card switching switch 30 through the output end, and the card switching switch 30 transmits the 1.8V electrical signal to the ESIM card interface in the radio frequency module 50, so as to complete the electrical signal transmission between the processor 10 and the ESIM card interface.

In another application scenario, when the user switches from the ESIM card interface to the SIM card interface, referring to fig. 3, after the card switch 30 receives the card switch signal, the power supply chip 70 supplies power to the SIM card interface 60 through the second power supply path 72 (L6B), the card switch 30, the second power supply branch 32, the radio frequency module 50, the SIMVCC, and the fourth power supply branch, and the card switch 30 can obtain 3V voltage used by the SIM card interface 60 through the second power supply branch 32 (l6b_sw2), the radio frequency module 50, the SIMVCC, and the fourth power supply branch 52 (SIMVCC 2). Next, the card switch 30 sends control signals to the power switch 40 through the second power supply branch 32 (l6b_sw2), the radio frequency module 50, SIMVCC, and the third power supply branch 51 (SIMVCC 1), which can characterize the use of 3V voltage by the SIM card interface. Then, the power switch 40 sends an adjustment signal to the voltage switch circuit 20 through the power switch channel 41, where the adjustment signal is used to inform the voltage switch circuit 20 that the voltage at the output end needs to be raised to 3V, and the voltage switch circuit 20 boosts the voltage of 1.2V at the input end, which is matched with the processor 10, so as to adjust the voltage at the output end of the voltage switch circuit 20 to 3V, and complete the switch from the ESIM interface to the SIM interface.

After switching the SIM card interface, referring to fig. 3, the flow path of the electrical signal (the dotted line shown in fig. 3) and the voltage of the electrical signal in the terminal device are as follows, the processor sends a 1.2V electrical signal to the input end of the voltage switching circuit 20, the voltage switching circuit 20 adjusts the 1.2V electrical signal from boosting to 1.8V to boosting to 3V, and outputs the 3V electrical signal to the card switching switch 30 through the output end, and the card switching switch 30 transmits the 3V electrical signal to the SIM card interface, so as to complete the electrical signal transmission between the processor 10 and the SIM card interface 60.

In the embodiment of the disclosure, the voltage switching circuit is arranged between the processor and the card switching switch, and is connected with the power supply switching switch, the power supply switching switch can regulate the voltage signal of the output end of the voltage switching circuit according to the virtual card or the physical card connected with the card switching switch, so that the voltage of the output end of the voltage switching circuit is matched with the physical card or the virtual card, the setting quantity of the voltage switching circuit is reduced, the circuit is simplified, and the cost is saved.

In other possible embodiments, as shown in fig. 4 to 6, fig. 4 to 6 provide a terminal device, where fig. 5 is a signal transmission schematic diagram when the terminal device uses an ESIM card interface, and fig. 6 is a signal transmission schematic diagram when the terminal device uses a SIM card interface. In this embodiment, the preset voltage of the processor 10 is 1.2V, the esim interface uses 1.8V, and the SIM interface 60 uses 3V.

In one application scenario, when a user switches from a SIM card interface to an ESIM card interface, referring to fig. 5, the card switch 30 receives a card switch signal, the card switch 30 disconnects SIMVCC and the fourth power supply branch 52 (SIMVCC 2) to stop supplying power to the SIM card interface 60, and the power supply chip 70 supplies 1.8V voltage to the ESIM card interface in the radio frequency module 50 through the second power supply path 72, the card switch 30, and the second power supply branch 32 (l6b_sw2). The card switch 30 obtains that the voltage of 1.8V is used by the ESIM card interface through the second power supply branch 32 (l6b_sw2), then the card switch 30 sends a control signal to the power switch 40 through the first power supply branch 31 (l6b_sw1), the control signal can represent that the voltage of 1.8V is used by the ESIM card interface, then the power switch 40 can send an adjusting signal to the voltage switch circuit 20 through the power switch channel 41, the adjusting signal is used for informing that the voltage of the output end of the voltage switch circuit 20 needs to be reduced to 1.8V, the voltage switch circuit 20 boosts the voltage of 1.2V matched with the processor 10 at the input end of the voltage switch circuit 20, so that the voltage of the output end of the voltage switch circuit 20 is adjusted to 1.8V, and the switching of the SIM card interface to the ESIM card interface is completed.

After switching the ESIM card interface, referring to fig. 5, the flow path of the electrical signal (the dotted line shown in fig. 5) and the voltage of the electrical signal in the terminal device are specifically as follows, the processor 10 sends a 1.2V electrical signal to the input end of the voltage switching circuit 20, the voltage switching circuit 20 boosts the 1.2V electrical signal to 1.8V, and outputs the 1.8V electrical signal to the card switching switch 30 through the output end, and the card switching switch 30 transmits the 1.8V electrical signal to the ESIM card interface in the radio frequency module 50, so as to complete the electrical signal transmission between the processor 10 and the ESIM card interface.

In another application scenario, when the user switches from the ESIM card interface to the SIM card interface, referring to fig. 6, after the card switch 30 receives the card switch signal, the power supply chip 70 supplies power to the SIM card interface 60 through the second power supply path 72 (L6B), the card switch 30, SIMVCC, and the fourth power supply branch 52 (SIMVCC 2). Card switch 30 is able to obtain the 3V voltage used by SIM card interface 60 via SIMVCC and fourth power supply branch 52 (SIMVCC 2), and card switch 30 then sends a control signal to power switch 40 via SIMVCC and third power supply branch 51 (SIMVCC 1), which control signal is able to characterize the 3V voltage used by the SIM card interface. Then, the power switch 40 sends an adjustment signal to the voltage switch circuit 20 through the power switch channel 41, where the adjustment signal is used to inform the voltage switch circuit 20 that the voltage at the output end needs to be raised to 3V, and the voltage switch circuit 20 boosts the voltage of 1.2V at the input end, which is matched with the processor 10, so as to adjust the voltage at the output end of the voltage switch circuit to 3V, and complete the switching from the ESIM interface to the SIM interface.

After switching the SIM card interface, referring to fig. 6, the flow path of the electrical signal (the dotted line shown in fig. 6) and the voltage of the electrical signal in the terminal device are as follows, the processor sends a 1.2V electrical signal to the input end of the voltage switching circuit 20, the voltage switching circuit 20 adjusts the 1.2V electrical signal from boosting to 1.8V to boosting to 3V, and outputs the 3V electrical signal to the card switching switch 30 through the output end, and the card switching switch 30 transmits the 3V electrical signal to the SIM card interface, so as to complete the electrical signal transmission between the processor 10 and the SIM card interface 60.

In one embodiment, as shown in fig. 1-6, the output of voltage switching circuit 20 is communicatively coupled to card switch 30 via a second signal group signal path 21. The signals sent by the processor 10 can sequentially pass through the first signal group signal path 11, the voltage switching circuit 20, the second signal group signal path 21 and the card switching switch, and then control the ESIM card interface or the SIM card interface according to the setting of the card switching switch.

Note that, referring to fig. 1 to 6, among the signal paths shown in the drawings, for example, the first signal group signal path 11, the second signal group signal path 21, the third signal group signal path 33, and the fourth signal group signal path 34, each of the signal group signal paths includes an enable signal line (uim_en), a DATA signal line (uim_data), a clock signal line (uim_clk), a reset signal line (uim_rst), and the like, so as to transmit the signals of the processor 10 to the SIM card interface 60 and the ESIM card interface, ensuring signal transmission reliability and stability.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the utility model being indicated by the following claims.

It is to be understood that the utility model is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.

Claims

1. The terminal equipment is characterized by comprising a card change-over switch, an SIM card interface and an ESIM card interface, wherein the card change-over switch is respectively connected with the SIM card interface and the ESIM card interface;

2. The terminal device of claim 1, further comprising a voltage switching circuit, wherein the processor is electrically connected to an input of the voltage switching circuit, wherein an output of the voltage switching circuit is electrically connected to the card switch, and wherein the card switch is electrically connected to the SIM card interface and the ESIM card interface, respectively, via different signal paths;

3. The terminal device according to claim 2, further comprising a power supply changeover switch connected to the voltage changeover circuit through a power supply changeover path, the power supply changeover switch being configured to send a voltage changeover signal corresponding to the signal path to the voltage changeover circuit;

4. A terminal device according to claim 3, wherein the processor is communicatively coupled to the voltage switching circuit via a first signal group signal path; and/or the number of the groups of groups,

5. A terminal device according to claim 3, characterized in that the terminal device comprises a power supply module, which is electrically connected to the voltage switching circuit, the power supply module providing a preset voltage to an input of the voltage switching circuit.

6. A terminal device according to claim 3, characterized in that the terminal device comprises a radio frequency module, the ESIM card interface being integrated in the radio frequency module.

7. The terminal device of claim 6, wherein the radio frequency module comprises an NFC module.

8. The terminal device of claim 6, wherein the card switch is electrically connected to the radio frequency module through a second power supply branch, the second power supply branch being in parallel with the first power supply branch.

9. The terminal device of claim 6, wherein the radio frequency module is electrically connected to the SIM card interface through a third power supply branch, and supplies power to the SIM card interface;

the radio frequency module is electrically connected with the power supply change-over switch through a fourth power supply branch;

10. A terminal device according to claim 3, further comprising a power supply chip electrically connected to the card switch via a first power supply path and a second power supply path; and/or the number of the groups of groups,