CN112232096A

CN112232096A - Card detector, card reading device and electronic equipment

Info

Publication number: CN112232096A
Application number: CN202011096963.8A
Authority: CN
Inventors: 陈华星
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-01-15
Anticipated expiration: 2040-10-14
Also published as: CN112232096B

Abstract

The embodiment of the application discloses card detector, card reading device and electronic equipment, and card detector includes modem, card change over switch, SIM card support, virtual SIM card, card detector, wherein: the modem comprises a power interface and a first interface, is respectively connected with the SIM card holder and the virtual SIM card through the power interface, and is connected with the card changeover switch through the first interface; the card switching switch is respectively connected with the SIM card holder and the virtual SIM card and is used for controlling the conduction of one of the SIM card holder and the virtual SIM card; the card detector is connected with the SIM card holder; the card detector is used for collecting pin signals of the SIM card support, and the pin signals are used for identifying whether an entity SIM card exists on the SIM card support. By adopting the embodiment of the application, the detection effect of the card detector can be improved.

Description

Card detector, card reading device and electronic equipment

Technical Field

The present application relates to the field of computer technologies, and in particular, to a card detector, a card reading device, and an electronic apparatus.

Background

A virtual SIM card (also called eSIM card) refers to a virtual SIM card without a physical SIM card physical carrier. When the card detector is configured, a communication module corresponding to the virtual SIM card may be set, and the virtual SIM card included in the card detector is mainly used to provide network authentication, carry customer information, and store applications provided by an operator. The virtual SIM card may also be used for network communication and data processing.

In practical applications, the card detector may include at least one SIM card holder (also understood as a SIM card slot) for accommodating a physical SIM card, and when the card detector supports a virtual SIM card, the virtual SIM card and one SIM card holder on the electronic device generally share a SIM card interface on a modem of the electronic device, and a card switch is provided for controlling the modem to be conducted with one of the SIM card holder and the virtual SIM card.

Disclosure of Invention

The embodiment of the application provides a card detector, a card reading device and electronic equipment. The detection effect of the card detector can be improved. The technical scheme of the embodiment of the application is as follows:

in a first aspect, an embodiment of the present application provides a card detector, which includes a modem, a card switch, a SIM card holder, a virtual SIM card, and a card detector, where:

the modem comprises a power interface and a first interface, is respectively connected with the SIM card holder and the virtual SIM card through the power interface, and is connected with the card changeover switch through the first interface;

the card switching switch is respectively connected with the SIM card holder and the virtual SIM card and is used for controlling the conduction of one of the SIM card holder and the virtual SIM card;

the card detector is connected with the SIM card holder;

the card detector is used for collecting pin signals of the SIM card support, and the pin signals are used for identifying whether an entity SIM card exists on the SIM card support.

In a second aspect, embodiments of the present application provide a card reading apparatus, which includes the above card detector.

In a third aspect, an embodiment of the present application provides an electronic device, where the electronic device includes the card reading device.

The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise:

in one or more embodiments of the present application, the card detector includes a modem, a card switch, a SIM card holder, a virtual SIM card, a card detector, wherein: the modem comprises a power interface and a first interface, is respectively connected with the SIM card holder and the virtual SIM card through the power interface, and is connected with the card changeover switch through the first interface; the card switching switch is respectively connected with the SIM card holder and the virtual SIM card and is used for controlling the conduction of one of the SIM card holder and the virtual SIM card; the card detector is connected with the SIM card holder; the card detector is used for collecting pin signals of the SIM card support, and the pin signals are used for identifying whether an entity SIM card exists on the SIM card support. The power interface of the card detector is directly connected with the SIM card support and the virtual SIM card without passing through a card-switching switch, even if the card-switching switch is controlled to be connected with the virtual SIM card, a power signal also exists between the SIM card support and the modem 10, namely the modem normally supplies power for the SIM card support through the power interface. Therefore, when the virtual SIM card works, whether the entity SIM card exists on the SIM card support can be normally detected based on the pin signal of the SIM card support, and the detection effect of the card detector is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a card detector provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a circuit application involving a card detector according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a pin of a circuit involved in a card detector provided in an embodiment of the present application;

fig. 4 is a schematic view of a scenario of detecting an entity SIM card according to an embodiment of the present application;

FIG. 5 is an equivalent resistance diagram of a card detector according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of another card detector circuit according to an embodiment of the present application;

fig. 7 is a schematic diagram of an internal connection relationship including a near field communication chip 70 according to an embodiment of the present application;

FIG. 8 is a schematic diagram of another card detector circuit according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a card reading device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of circuitry consistent with aspects of the present application, as detailed in the appended claims.

In the related art, a SIM card interface on the modem outputs a power signal to the card switch, the card switch controls the connection with one of the SIM card holder and the virtual SIM card, when the card switch is connected with the virtual SIM card, the SIM card holder, which is usually under the control of the same card switch as the virtual SIM card, is in a power-off state, and at this time, if the SIM card holder has an entity SIM card inserted or pulled out, the SIM card holder is usually not detected, thereby causing a poor detection effect of the card detector.

The present application will be described in detail with reference to specific examples.

In an actual communication environment of the electronic device, the communication server may provide a communication network for the electronic device, and the communication server may provide virtual Subscriber Identity Module (SIM) card data and a service for implementing network communication using the virtual SIM card to the electronic device.

In addition, the electronic device also has a SIM holder (also understood to be a SIM card slot) for receiving the physical SIM card, which is provided to the user for inserting the physical SIM card. The method and the device are mainly used for identifying the inserted entity SIM card under the condition that the electronic equipment is configured with the virtual SIM card.

Furthermore, compared with the traditional solid SIM, the virtual SIM does not need an SIM holder, so that the PCB area of the electronic equipment can be saved, and related services such as SIM card opening/deletion can be executed in the air. In practical applications, an electronic device may be configured with at least one SIM card holder to support a communication network of at least one system, and it is understood that, in order to support multimode communication, the electronic device may be configured with a plurality of SIM card holders to support inserting entity SIM cards of different network systems into each SIM card holder, for example, the electronic device may be configured with 2 SIM card holders to support 2 entity SIM cards of the same or different network systems, and a modem included in the electronic device is connected to the SIM card holders through SIM card interfaces, where the number of SIM card interfaces on the modem is usually associated with the number of SIM card holders, and the number of SIM card interfaces on the modem is equal to the number of SIM card holders, for example. In some embodiments, when the electronic device is configured with a virtual SIM card, the electronic device further includes a card switch, and the card switch is connected to a path of SIM card interface on the modem, where the SIM card interface may include a reset interface, a clock interface, and a data signal line. Further, the electronic device controls one of the SIM card holder and the virtual SIM card to be turned on through a card switch, so as to implement switching between the virtual SIM card and the physical SIM card on the electronic device.

Referring to fig. 1, fig. 1 is a schematic diagram of a card detector according to an embodiment of the present disclosure.

As shown in fig. 1, a card detector is proposed, in this embodiment, the card detector 1 may be composed of a modem 10, a card switch 20, a SIM holder 30, a virtual SIM card 40, and a card detector 50.

The Modem (Modem)10 is generally used for processing of a relevant communication protocol, modulation/demodulation of communication data transmitted/received in a communication network, and the like. The modem typically communicates with a physical SIM card and/or a virtual SIM card on a SIM card holder.

The physical SIM card, which is typically placed in a SIM card holder when in use, is used to store network-specific information for authenticating and identifying subscribers on a network, including: integrated Circuit Card Identity (ICCID), International Mobile Subscriber Identity (IMSI), authentication key (Ki), and Local Area Identity (LAI), as well as other operator-specific data, such as SMSC (short message service center) Number, Service Provider Name (SPN), Service Dialing Number (SDN), and Value Added Service (VAS) applications.

Further, in order to accommodate a physical SIM card, the card detector 1 is provided with a corresponding SIM card holder 30, and the SIM card holder 30 may be in the form of a stand-alone card holder, a one-holder two-type card holder, or the like.

Specifically, the Modem (Modem)10 includes a power interface 101 and a first interface 102, and the Modem 10 may be connected to the SIM card holder 30 and the virtual SIM card 40 through the power interface 101, respectively, and may input a power signal to the SIM card holder 30 and the virtual SIM card based on the power interface 101.

The modem 10 can be connected to the card changeover switch 20 through the first interface 102; the first interface 102 is a non-power interface and may be formed by at least one functional type of interface, and in some embodiments, the first interface 102 may be formed by a reset interface, a clock interface, and a data signal line interface of the modem 10.

Wherein, the reset interface (reset) of the modem 10 is configured to input a reset signal to the SIM card holder 30 or the virtual SIM card through the card switch 20, for example, when the card switch 20 controls the SIM card holder 30 to be turned on, the modem 10 generates a reset signal, and the reset signal is transmitted to the SIM card holder 30 through the reset interface (reset) on the modem 10 and the card switch 20, and when the SIM card holder 30 has a physical SIM card, the physical SIM card can be controlled based on the reset signal; a clock interface (CLK) of the modem 10 for inputting a clock input signal to the SIM card holder 30 or the virtual SIM card through a card changeover switch 20; a DATA signal line interface (DATA) of the modem 10 is used for transmission of DATA transmission signals with the SIM card holder 30 or the virtual SIM card through a card changeover switch 20.

The card switch 20 is respectively connected to the SIM card holder 30 and the virtual SIM card 40, and configured to control one of the SIM card holder 30 and the virtual SIM card 40 to be turned on;

the card switch 20 may be an electronic device having a SIM card holder 30 and the virtual SIM card for switching, including but not limited to a voltage switch (such as a MOS transistor), an electronic switch, a digital switch, a multi-way single-pole double-throw analog switch, and so on.

Further, the card switch 20 is configured to receive a conducting signal of the modem 10, and determine to control conducting with one of the SIM card holder 30 and the virtual SIM card 40 based on a type of the conducting signal, as shown in fig. 1, the card switch 20 may include a conducting interface 201 and a conducting interface 202, where the conducting interface 201 is connected with the SIM card holder 30, and the conducting interface 202 is connected with the virtual SIM card 40.

In a specific embodiment, if a first on signal is generated at the modem 10 and transmitted to the card switch 20 through the first interface, the card switch 20 recognizes and responds to the first on signal, and the on interface 201 of the control card switch 20 is turned on with the SIM card holder 30, at this time, the path between the SIM card holder 30 and the modem 10 in the card detector 1 is normally in an on state, and the path between the virtual SIM card 40 and the modem 10 is in an off state, that is, the virtual SIM card 40 is in an off state. Further, the card detector 1 may load the subscriber identity module card data (i.e., SIM card data) in the entity SIM card private to the subscriber through the SIM card holder 30, and then control the Modem (i.e., the Modem 10) to initiate an authentication request to the communication network based on the subscriber identity module card data (SIM card data) in the entity SIM card, so as to establish a communication link to the communication network, and transmit the data service based on the communication link.

In a specific embodiment, if the modem 10 generates the second on signal and transmits the second on signal to the card switch 20 through the first interface, the card switch 20 recognizes and responds to the second on signal, and the on interface 202 on the control card switch 20 is connected to the virtual SIM card 40, at this time, the path between the virtual SIM card 40 and the modem 10 in the card detector 1 is normally in an on state, and the path between the SIM holder 30 and the modem 10 is in an off state, that is, the SIM holder 30 is in an off state. Further, the card detector 1 may load, through the virtual SIM card, virtual SIM card data (including an authentication key) in the virtual SIM card private to the user, and then control the Modem (i.e., the Modem 10) to initiate an authentication request to the communication network based on the virtual SIM card data in the virtual SIM card, so as to establish a communication link to the communication network, and transmit data services based on the communication link.

The card detector 50 is connected to the SIM card holder 30, the card detector has an electronic device for detecting the physical SIM card plugging/unplugging function, in some embodiments, the card detector 50 may be an analog-to-digital converter (ADC) which may monitor the change of the circuit parameters (such as voltage parameter and current parameter) of the branch circuit; further, when the card tester 50 is an analog-to-digital converter, the analog-to-digital converter may be separately configured in the card tester 1, or may be integrated in a Power Management Unit (PMU) or A Processor (AP) not shown in fig. 1. In some embodiments, the card detector 50 may be a processor having a function of detecting the insertion and extraction of a physical SIM card, and is configured to identify a digital signal (e.g., a pin signal) of the branch in which the card detector is located, and determine whether a physical SIM card exists on the SIM card holder 30 based on the digital signal (e.g., the pin signal);

it should be noted that the power signals of the virtual SIM card 40 and the SIM card holder 30 are not transmitted through the card switch 20, so as to avoid that the SIM card holder 30 is in a power-off state when the card switch 20 controls the virtual SIM card 40 to be turned on, and at this time, if there is an actual SIM card inserted and pulled, the card detector 50 in the card detector 1 cannot monitor the pin signal on the SIM card holder 30.

The card detector 50 is configured to collect a pin signal of the SIM card holder, where the pin signal is used to identify whether a physical SIM card exists on the SIM card holder.

In a specific implementation scenario, as shown in fig. 2, fig. 2 is a schematic diagram of a circuit application related to a card detector, in fig. 2, the card detector 1 at least includes two SIM card holders, which are a SIM card holder 30 and a SIM card holder 60, where the SIM card holder 60 is connected to a second power interface 103 on the modem 10, the modem 10 can directly communicate with the SIM card holder 60 through the second power interface 103, and further, the second power interface 103 can be used as a SIM card interface and at least includes a power interface, a reset interface, a clock interface, and a data signal line interface. It can be understood that the SIM holder 60 occupies one SIM card interface on the modem 10 separately, and the SIM holder 30 and the virtual SIM card 40 share one SIM card interface on the modem 10 through the card switch 20, wherein the SIM card interface may be composed of the power interface 101 and the first interface 102. In practical applications, the SIM card holder 30 and the SIM card holder 60 are actually a card holder module or a card slot module, and at least include an extendable card holder movable portion and an electrical connector socket in the PCB, where the card holder movable portion is used to accommodate an actual SIM card, when the extendable card holder movable portion is pulled out, the electrical connector socket in the PCB is in an off state (that is, the SIM card holder is in a non-operating state), when the extendable card holder movable portion is inserted, the electrical connector socket in the PCB is in an on state (that is, the SIM card holder is in an operating state), and when the SIM card holder is in the operating state, the card detector 50 may acquire a pin signal of the SIM card holder, for example, the pin signal of the SIM card holder 30 may be acquired, and it is determined whether the actual SIM card exists in the SIM card holder 30 based on the pin signal.

It should be noted that, in the present embodiment, even if the card switch 20 is controlled to be turned on with the virtual SIM card 40, a power signal also exists between the SIM card holder 30 and the modem 10, that is, the modem 10 normally supplies power to the SIM card holder 30 through the power interface 101. Therefore, when the virtual SIM card 40 works, whether a physical SIM card exists on the SIM card holder 30 can be normally detected based on the pin signal of the SIM card holder 30.

Further, as shown in fig. 3, fig. 3 is a schematic diagram of a pin of a circuit involved in a card detector.

The SIM card holder 30 may include a reset pin 302 and a power pin 301.

The specific circuit connection relationship is as follows:

specifically, the card detector 50 is connected to the reset pin 302;

the power interface 101 is connected to the reset pin 302 and the power pin 301 respectively;

the card detector 50 is configured to collect a pin signal generated on the reset pin 302 of the SIM card holder 30, and identify whether an entity SIM card exists on the SIM card holder 30 according to the pin signal and a reference signal corresponding to the reset pin 302.

Specifically, since the card detector 50 is connected to the reset pin 302, the change of the pin signal of the reset pin 302 on the SIM card holder 30 can be monitored, and the pin signal can be a circuit parameter signal, such as a voltage signal, for example, a current signal.

It can be understood that when a physical SIM card exists on the SIM card holder 30, the pin signal of the reset pin 302 on the SIM card holder 30 changes, and based on the collected pin signal generated on the reset pin 302 of the SIM card holder 30, and in combination with the reference signal corresponding to the reset pin, it can be identified whether the physical SIM card exists on the SIM card holder 30. Here, the reference signal may be understood as an actual pin signal corresponding to the reset pin 302 when the SIM holder 30 does not have a physical SIM card, such as: when the pin signal is a voltage signal, the reference signal reset pin 302 is an actual voltage signal corresponding to the "when the SIM card holder 30 does not have a physical SIM card", again, for example: when the pin signal is a current signal, the reference signal resets the actual current signal corresponding to the pin 302 when the SIM card holder 30 does not have a physical SIM card, and so on.

Optionally, the card detector 1 may further include a first resistor R1, and the specific circuit connection relationship may refer to fig. 3. as shown in fig. 3, one end of the first resistor R1 is connected to the power interface 101 and the power pin 301, respectively, and the other end of the first resistor R1 is connected to the reset pin 302 and the card detector 50, respectively.

The first resistor R1 may pull up a power signal of the power interface 101 of the modem 10 to the power pin of the SIM card holder 30, so as to perform serial voltage division on the branch of the card detector 1 where the first resistor R1 is located; in practical operation, when no physical SIM card exists on the SIM card holder 30, the reset pin 302 can pull up the power signal of the power interface 101 of the modem 10 to the power pin 301 through the first resistor R1 based on the principle of "serial voltage division of the branch of the card detector 1 where the first resistor R1 is located". At this point, the actual pin signal collected by card detector 50 is typically approximately consistent with the power interface 101 power signal of modem 10. It will be understood that the "actual pin signal" is also the reference signal corresponding to the reset pin mentioned above. In order to detail the working principle of the present embodiment, the following description will be given by way of example with reference to specific implementation scenarios, specifically as follows:

in a specific embodiment, the pin signal may be a voltage signal, and the reference signal may be a reference voltage signal;

when no physical SIM card exists on the SIM card holder 30, the reset pin 302 pulls up the power signal of the power interface 101 of the modem 10 to the power pin 301 through the first resistor R1. At this time, the reference voltage signal collected by the card detector 50 is generally approximately consistent with the power signal of the power interface 101 of the modem 10, and it is assumed that the voltage value corresponding to the reference voltage signal is v (n).

Further, as shown in fig. 4, fig. 4 is a schematic view of a scenario of detecting an entity SIM card, when an entity SIM card exists on the SIM card holder 30, that is, when a user inserts an entity SIM card into the SIM card holder 30, a GND pin of the SIM card holder 30 is grounded, and an equivalent resistance exists between the reset pin 302 and the GND pin, as shown in fig. 5, fig. 5 is a schematic view of an equivalent resistance of an entity SIM card existing in the SIM card holder, and in fig. 5, when an entity SIM card exists on the SIM card holder 30, an equivalent resistance RX exists between the reset pin 302 and the GND pin. Based on this, the first resistor R1 and the equivalent resistor RX are serially connected to divide the voltage.

At this time, it is assumed that the voltage signal collected by the card detector 50 at the reset pin is v (y), and v (y) can be expressed as:

where V0 is the voltage value at the power interface 101 of the modem 10, i.e., V0 is approximately equal to the voltage value corresponding to the reference voltage signal V (n).

Based on this, the card detector 50 collects the voltage value v (y) corresponding to the voltage signal, and when the voltage value v (y) is smaller than the voltage value v (n) corresponding to the reference voltage signal, it may be determined that the physical SIM card exists on the SIM card holder 30; and the number of the first and second groups,

the card detector 50 acquires a voltage value v (y) corresponding to the voltage signal, and when the voltage value v (y) is equal to the voltage value v (n) corresponding to the reference voltage signal, it is determined that no physical SIM card exists on the SIM card holder 30;

optionally, in practical applications, in consideration of a possible measurement deviation in an actual circuit environment, a voltage threshold may be set, and when a difference between a voltage value v (n) corresponding to a reference voltage signal and a voltage value v (y) corresponding to the voltage signal is less than or equal to the voltage threshold, it may be considered that no physical SIM card exists on the SIM card holder 30;

when the difference between the voltage value v (n) corresponding to the reference voltage signal and the voltage value v (y) corresponding to the voltage signal is greater than the voltage threshold, it may be determined that no physical SIM card exists on the SIM card holder 30.

In a specific embodiment, the pin signal may be a current signal, and the reference signal may be a reference current signal, and according to the current characteristic of the series circuit, under the condition that the voltage value corresponding to the power signal of the power interface 101 of the modem 10 is certain, the determination may be performed as follows:

the card detector 50 acquires a current value i (y) corresponding to the current signal, and when the current value i (y) is greater than a current value i (n) corresponding to the reference current signal, it may be determined that a physical SIM card exists on the SIM card holder 30; and the number of the first and second groups,

the card detector 50 acquires a current value i (y) corresponding to the current signal, and when the current value v (y) is equal to the current value i (n) corresponding to the reference current signal, it is determined that no physical SIM card exists on the SIM card holder 30;

optionally, in practical application, in consideration of a possible measurement deviation in an actual circuit environment, a voltage threshold may be set, and when a difference between a current value v (n) corresponding to the reference current signal and a current value i (y) corresponding to the current signal is greater than or equal to the current threshold, it may be considered that no physical SIM card exists on the SIM card holder 30;

when the difference between the current value v (n) corresponding to the reference current signal and the current value v (y) corresponding to the current signal is smaller than the current threshold, it may be determined that no physical SIM card exists on the SIM card holder 30.

In this embodiment, by using the circuit corresponding to the card detector 1, the virtual SIM card 40 and the SIM card holder 30 share the same SIM card interface (actually, a reset interface, a clock interface, a data signal line interface, etc. in the SIM card interface) through the card switch 20, so that when the modem 10 in the card detector 1 is turned on with the virtual SIM card through the card switch 20, and when the card switch 20 is turned off from the SIM card holder 30, the card detector can acquire a pin signal generated on a reset pin of the SIM card holder to determine whether an entity SIM card exists on the SIM card holder. Therefore, the situation that whether the entity SIM card exists on the SIM card support or not can not be detected under the situation that the modem in the card detector 1 is conducted with the virtual SIM card through the card switch and disconnected with the SIM card support through the card switch in the related technology is avoided, the accurate identification of the entity SIM card is realized, and the entity SIM card can be intelligently identified based on the pin signal. The detection accuracy of the card detector 1 is greatly improved.

Referring to fig. 6, fig. 6 is a schematic circuit diagram of another card detector. In practical applications, the physical SIM card may be an NFC-SIM card supporting a Near Field Communication (NFC) function, and a corresponding near field communication chip may be disposed on the card detector 1 to support the NFC-SIM card's near field communication function. In view of this, the present embodiment specifically proposes an identification scheme of a physical SIM card based on the card detector 1 including a near field communication chip. Fig. 6 shows a schematic circuit structure diagram, in fig. 6, in order to cover most situations in an actual application environment, generally, in the actual application environment, an electronic device configured with a card detector 1 is a device supporting a dual-entity SIM card, based on which, the card detector 1 related to fig. 6 shows two SIM card holders, which are a SIM card holder 30 and a SIM card holder 60, it should be noted that the card detector 1 related to this embodiment may be applicable to a scenario of at least one SIM card holder, and specific explanations are as follows:

the card detector 1 further comprises a near field communication chip 70;

the SIM card holder 30 includes a single wire protocol pin (SWP pin) 303, a reset pin 302, and a power pin 301;

the card detector 50 is connected with the SIM card holder 30 through the near field communication chip 70;

the power interface 101 is connected to the reset pin 302 and the power pin 301 via the near field communication chip 70;

the near field communication chip 70 is connected with a single wire protocol pin 303 on the SIM card holder 30;

further, the above-mentioned single-wire protocol pin, that is, the SWP pin, is often applied to a Near Field Communication (NFC) environment, the SWP single-wire protocol is to implement full duplex communication on one single wire, in this embodiment, a communication connection between the NFC chip and the SIM card holder 30 may be established based on the SWP pin, and the SWP protocol is a protocol related to a physical layer and a data link layer. The physical layer is responsible for the activation, maintenance, deactivation, etc. of the physical link between the UICC (universal integrated chip card), which is equivalent to the NFC-SIM card, and the CLF (contactless frontend), which is equivalent to the near field communication chip 70 configured by the SIM card circuitry.

Further, the power of the SIM card holder 30 is provided by the near field communication chip 70, that is, the modem 10 may output a power signal to the near field communication chip 70 through the power interface 101, and is powered by the power pin 301 of the SIM card holder 30 through the near field communication chip 70;

In this embodiment, a pin signal generated by the single wire protocol pin 303 of the SIM card holder 30 is mainly collected to identify whether an entity SIM card exists on the SIM card holder 30 based on the pin signal, and further, when an entity SIM card exists on the SIM card holder 30, and a specific entity SIM card is an entity SIM card (also called NFC-SIM card) supporting a near field communication function, at this time, a power supply of the SIM card holder 30 accommodating the NFC-SIM card is provided by the near field communication chip 70, and the single wire protocol pin 303 of the SIM card holder 30 is connected to the single wire protocol pin 702 on the near field communication chip 70, and generates a corresponding bidirectional data transmission signal supporting the near field communication function, such as a handshake communication signal corresponding to the near field communication, it can be understood that, if the single wire protocol pin 303 generates a handshake communication signal, at this time, the entity SIM card exists on the SIM card holder 30, in this embodiment, the handshake communication signal generated in the above communication process may be directly monitored, that is, the card detector 50 may be configured to collect the pin signal generated by the single-wire protocol pin 303 through the near field communication chip 70, and identify whether the entity SIM card exists on the SIM card holder 30 based on the pin signal.

Further, the card detector 50 may collect and monitor a pin signal between the near field communication chip 70 and the SIM card holder 30, and in a specific implementation, after the card detector 50 collects the pin signal, it determines that a target entity SIM card exists on the SIM card holder 30 when recognizing that the handshake communication signal exists between the near field communication chip 70 and the single wire protocol pin, that is, the pin signal is the handshake communication signal; and the number of the first and second groups,

the card detector 50 is configured to determine that the target entity SIM card does not exist on the SIM holder 30 when the handshake communication signal is not recognized to exist between the near field communication chip 70 and the single-wire protocol pin 302, where the target entity SIM card is an entity SIM card supporting a near field communication function, that is, the above-mentioned NFC-SIM card.

In addition, the card detector 1 according to the present embodiment may be applicable to a scenario with at least one SIM card holder, for example, the card detector 1 shown in fig. 6 may be applicable to a scenario with two SIM card holders, and when the electronic device includes the card detector 1, the electronic device may support communication of two physical SIM cards at the same time. The circuit connection relationship corresponding to the scenario in which the card detector 1 is adapted to two SIM card holders is explained as follows:

in fig. 6, the card detector 1 includes two SIM holders, a SIM holder 30 and a SIM holder 60;

the SIM card holder 60 is connected to the second power interface 103 of the modem 10 through the "power pin 704 on the near field communication chip 70", and the second power interface 103 is a power interface of the modem 10 for outputting a power signal to the SIM card holder 60; in addition, the near field communication chip 70 includes a single-wire protocol pin 703 that establishes a near field communication connection with the SIM card holder 60, and it can be understood that, when the entity NFC-SIM card exists in the SIM card holder 60, a communication process such as activation and maintenance of a near field communication physical link between the near field communication chip 70 and the NFC-SIM card entity on the SIM card holder 60 is performed based on the "single-wire protocol pin 602 and the single-wire protocol pin 703".

The SIM card holder 30 is connected to a power interface 101 on the modem 10 through a "power pin 701 on the near field communication chip 70", where the power interface 101 is a power interface on the modem 10 for outputting a power signal to the SIM card holder 30; in addition, the near field communication chip 70 includes a single-wire protocol pin 702 for establishing a near field communication connection with the SIM card holder 30, and it can be understood that, when an entity NFC-SIM card exists in the SIM card holder 30, a communication process such as activation and maintenance of a near field communication physical link is performed between the near field communication chip 70 and the NFC-SIM card entity on the SIM card holder 30 based on the "single-wire protocol pin 303 and the single-wire protocol pin 702".

Further, the card detector 50 may also collect a pin signal of the single-wire protocol pin 602 on the SIM card holder 60 through the single-wire protocol pin 703 on the near field communication chip 70, and identify whether the target entity SIM card exists on the SIM card holder 60 based on the pin signal. The identification process is similar to the identification process of the target entity SIM card (i.e. NFC-SIM card) on the SIM card holder 30, and is not described herein again.

Further, as shown in fig. 7, fig. 7 shows a schematic diagram of an internal connection relationship including a near field communication chip 70, and in this embodiment, taking fig. 7 as an example, in a scenario suitable for two SIM card holders, the near field communication chip 70 implements near field communication function control on the SIM card holder 60 and the SIM card holder 30 (for example, a near field communication function of an entity SIM card on a certain card holder is turned on) to perform paraphrasing.

The near field communication chip 70 shown in fig. 7 may further include an interface 1031, an interface 1011, a GND interface, and an interface 705.

The interface 1031 is configured to connect the nfc chip 70 with the second power interface 103 on the modem 10, and receive a power signal output from the second power interface 103 on the modem 10;

the interface 1011 is used for connecting the nfc chip 70 to the power interface 101 of the modem 10 and receiving a power signal output from the power interface 101 of the modem 10.

The GND interface is used for grounding the near field communication chip 70;

the interface 705 is used for connecting the nfc chip 70 with the card detector 50, so that the card detector 50 collects pin signals on a single-wire pin on the SIM card holder through the interface 705 to identify whether a target entity SIM card exists on the SIM card holder based on the pin signals. .

In addition, the near field communication chip 70 further includes a near field communication switch 71 and a near field communication switch 72, where the near field communication switch 71 is used for the near field communication chip 70 to control the interrupt of the "single-wire protocol pin 602 on the SIM card holder 60", that is, to control the state of the near field communication function of the NFC-SIM card on the SIM card holder 60 (such as turning on the near field communication function and turning off the near field communication function) in practical application; the NFC switch 72 is used for the NFC chip 70 to control the interruption of the "single-wire protocol pin 303 on the SIM card holder 30", that is, to control the state of the NFC-SIM card near field communication function on the SIM card holder 30 (for example, to turn on the near field communication function and turn off the near field communication function) in practical applications;

Referring to fig. 8, fig. 8 is a schematic circuit diagram of another card detector. In the card detector 1 shown in fig. 6 and fig. 7, the card detector 1 may implement detection on a target entity SIM card, that is, on an NFC-SIM card supporting a Near Field Communication (NFC) function. In the circuit structure shown in fig. 8, the physical SIM card detection scheme of at least one of the foregoing embodiments may be compatible, and the intelligent detection on the physical SIM card may be implemented in various ways. The details are as follows.

On the basis of the card detector 1 shown in fig. 6, the circuit configuration of the card detector 1 shown in fig. 8 may include a second resistor R2, wherein,

one end of the second resistor R2 is connected to the power interface 101 of the modem through the nfc chip 70, that is, as shown in fig. 8, one end of the second resistor R2 may be connected to the "power pin 701 on the nfc chip 70";

the other end of the second resistor R2 is connected with a power supply pin 301 on the SIM card 30;

the card detector 50 is respectively connected with a reset pin 302 on the SIM card 30 and an interface 705 on the near field communication chip 70;

based on the corresponding connection relationship of the card detector 1, the method for detecting the physical SIM card is as follows:

in the method 1, the card detector 50 may be configured to collect a pin signal (e.g., a voltage signal or a current signal) generated on the reset pin 302 of the SIM card holder 30, and identify whether a physical SIM card exists on the SIM card holder according to the pin signal and a reference signal (e.g., a reference voltage signal or a reference current signal) corresponding to the reset pin 302.

The specific identification manner can be explained in detail in the foregoing embodiments, and is not repeated herein.

In the mode 2, the card detector 50 may be configured to acquire a pin signal generated by the single-wire protocol pin 303 of the SIM card holder 30 through the near field communication chip 70, and identify whether a target entity SIM card exists on the SIM card holder based on the pin signal, that is, when the pin signal is a handshake communication signal, determine that the target entity SIM card (NFC-SIM card) exists on the SIM card holder.

In practical application, the card detector 1 may identify the physical SIM card according to the above two manners at the same time, and detect successfully in any manner: the existence of the solid SIM card on the SIM card support can be judged. The detection mode is more flexible, and the detection way and the detection efficiency of the card detector 1 are improved.

In one embodiment, as shown in fig. 9, the present application further discloses a card reading device 100, where the card reading device 100 includes the card detector according to the above-mentioned embodiment.

In one embodiment, as shown in fig. 10, an electronic device 1000 including the card reading apparatus 100 in the above embodiments is also disclosed in the embodiments of the present application. The electronic device 1000 may be any device having SIM card detection functionality. The electronic devices include, but are not limited to: a liquid crystal touch display device, a conference tablet, a personal computer, a tablet computer, an in-vehicle device, a computing device, or other processing device connected to a wireless modem, etc. Electronic devices in different networks may be called different names, such as: user equipment, access terminal, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user equipment, cellular telephone, cordless telephone, Personal Digital Assistant (PDA), electronic device in a 5G network or future evolution network, and the like.

In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. Further, in the description of the present application, "a plurality" means two or more unless otherwise specified. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present application and is not to be construed as limiting the scope of the present application, so that the present application is not limited thereto, and all equivalent variations and modifications can be made to the present application.

Claims

1. A card detector, comprising a modem, a card switch, a SIM card holder, a virtual SIM card, and a card detector, wherein:

the card detector is connected with the SIM card holder;

2. The card detector of claim 1, wherein the SIM card holder comprises a reset pin and a power pin, wherein:

the card detector is connected with the reset pin;

the power supply interface is respectively connected with the reset pin and the power supply pin;

the card detector is used for collecting pin signals generated on the reset pin of the SIM card support and identifying whether an entity SIM card exists on the SIM card support according to the pin signals and reference signals corresponding to the reset pin.

3. The card detector of claim 2, further comprising a first resistor, wherein:

one end of the first resistor is connected with the power interface and the power pin respectively, and the other end of the first resistor is connected with the reset pin and the card detector respectively.

4. The card detector of claim 1 or 2, wherein the pin signal is a voltage signal and the reference signal is a reference voltage signal, wherein:

the card detector is used for determining that an entity SIM card exists on the SIM card support when the voltage signal is smaller than the reference voltage signal; and the number of the first and second groups,

the card detector is to determine that the physical SIM card is not present on the SIM card holder when the voltage signal is equal to the reference voltage signal.

5. The card detector of claim 1 or 2, wherein the pin signal is a current signal and the reference signal is a reference current signal, wherein:

the card detector is used for determining that a solid SIM card exists on the SIM card support when the current signal is greater than the reference current signal; and the number of the first and second groups,

the card detector is configured to determine that the physical SIM card is not present on the SIM card holder when the current signal is equal to the reference current signal.

6. The card detector of claim 1, further comprising a near field communication chip, the SIM card holder comprising a single wire protocol pin, a reset pin, and a power pin, wherein:

the card detector is connected with the SIM card holder through the near field communication chip;

the power supply interface is respectively connected with the reset pin and the power supply pin through the near field communication chip;

the near field communication chip is connected with a single wire protocol pin on the SIM card support;

the card detector is used for acquiring pin signals generated by the single-wire protocol pins through the near field communication chip and identifying whether an entity SIM card exists on the SIM card support or not based on the pin signals.

7. The card detector of claim 6, wherein the pin signal is a handshake communication signal, wherein:

the card detector is used for determining that a target entity SIM card exists on the SIM card support when recognizing that the handshaking communication signal exists between the near field communication chip and the single-wire protocol pin; and the number of the first and second groups,

the card detector is used for determining that the target entity SIM card does not exist on the SIM card support when the handshake communication signal does not exist between the near field communication chip and the single-wire protocol pin, and the target entity SIM card is an entity SIM card supporting a near field communication function.

8. The card detector of claim 6, further comprising a second resistor, wherein:

one end of the second resistor is connected with the power interface through the near field communication chip, and the other end of the second resistor is connected with the power pin;

the card detector is respectively connected with the reset pins;

9. A card reading device, characterized in that the SIM card reading device comprises a card detector according to any one of claims 1-8.

10. An electronic device, characterized in that it comprises a card reading device according to claim 9.