Dual-card dual-standby vehicle-mounted terminal communication module

Abstract

The utility model relates to the technical field of communication, in particular to a dual-card dual-standby vehicle-mounted terminal communication module, which comprises a communication module internally provided with a communication chip; the first built-in SIM card and the second built-in SIM card are both arranged in the communication module, the first built-in SIM card is connected with the first SIM card interface of the communication chip, and the second built-in SIM card is connected with the second SIM card interface of the communication chip; and the security chip is arranged in the communication module and is connected with the communication chip through the power conversion circuit. According to the utility model, on the premise that the hardware design is not changed, the dual-card dual-standby function upgrading of the vehicle-mounted terminal can be directly realized by replacing the communication module with the dual-card dual-standby function, the built-in security chip provides communication for a final user, and the communication security application provides an underlying encryption and decryption service interface, a channel encryption and decryption interface and the like; and the application security of the whole communication module can be ensured at a bottom layer.

Description

Technical Field

[0001] The utility model relates to the technical field of communications, and in particular to a vehicle-mounted terminal communication module. Background Art

[0002] With the development of smart cockpits and smart driving, more and more applications rely on vehicle-cloud communications, and the quality requirements for 5G communication network connections are getting higher and higher. Since the operator's network has certain blind spots and network congestion occurs from time to time, affecting the user experience, in order to improve the quality of vehicle-cloud communications, more and more original equipment manufacturers (OEMs) intend to support two chip-type identity cards (SIM cards) in the vehicle-mounted equipment (TBOX), support dual-card dual-standby services, and switch operator networks according to the communication quality.

[0003] In order to realize the dual-card dual-standby service, the current TBOX will include a communication module and a dual-SIM card external design, which is a separate design. In addition, the communication module and the 5G network service belong to different suppliers. The disadvantage of the existing technology is that if a single-card TBOX user wants to upgrade to the dual-card dual-standby function, it is necessary to add dual-card related circuit design and software matching development work to the original hardware circuit design, which has a long development cycle. The external dual-card separate design leads to the need to provide additional dual-chip SIM card design circuits for the external TBOX application design, which occupies the overall circuit board space, and also requires corresponding software development. In terms of business logic, the OEM manages the SIM card life cycle management and traffic of the external SIM card TBOX, which increases the management and operation costs. The communication module and the 5G network service belong to different suppliers, which is not suitable for enterprise management with private network operations and SIM card life cycle, as well as traffic management. There is no encryption and decryption function in the communication module, which requires external and peripheral circuit support. It is impossible to provide underlying encryption and decryption services, channel encryption and decryption services, etc. for the module's communication and communication security applications. Utility Model Content

[0004] The purpose of the utility model is to provide a dual-SIM dual-standby vehicle terminal communication module to solve the above technical problems;

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] A dual-SIM dual-standby vehicle terminal communication module, comprising:

[0007] A communication module, wherein a communication chip is provided in the communication module;

[0008] A first built-in SIM card and a second built-in SIM card are both arranged in the communication module, the first built-in SIM card is connected to the first SIM card interface of the communication chip, and the second built-in SIM card is connected to the second SIM card interface of the communication chip;

[0009] The security chip is arranged in the communication module and is connected to the communication chip via a power conversion circuit.

[0010] Preferably, the first built-in SIM card is connected to the first SIM card interface via a first SIM card interface circuit, and the second built-in SIM card is connected to the second SIM card interface via a second SIM card interface circuit.

[0011] Preferably, it further includes a first external SIM card and a second external SIM card located outside the communication module, the first external SIM card is connected to the first SIM card interface via the first SIM card interface circuit, and the second external SIM card is connected to the second SIM card interface via the second SIM card interface circuit.

[0012] Preferably, the first SIM card interface circuit comprises:

[0013] a first capacitor, wherein a first end of the first capacitor is connected to a connection node between a reset pin of the first SIM card interface and a reset pin of the first built-in SIM card, and a second end of the first capacitor is grounded;

[0014] a first resistor, wherein a first end of the first resistor is connected to a clock pin of the first SIM card interface, and a second end of the first resistor is connected to a clock pin of the first built-in SIM card;

[0015] a second resistor, wherein a first end of the second resistor is connected to a data transmission pin of the first SIM card interface, and a second end of the second resistor is connected to a data transmission pin of the first built-in SIM card;

[0016] a third resistor, wherein a first end of the third resistor is connected to a data transmission pin of the first SIM card interface, and a second end of the third resistor is connected to a connection node between a power pin of the first SIM card interface and a power pin of the first built-in SIM card;

[0017] a second capacitor, wherein a first end of the second capacitor is connected to a second end of the second resistor, and a second end of the second capacitor is grounded;

[0018] a third capacitor, wherein a first end of the third capacitor is connected to the second end of the first resistor, and a second end of the third capacitor is grounded;

[0019] A fourth capacitor, wherein a first end of the fourth capacitor is connected to the second end of the third resistor, and a second end of the fourth capacitor is grounded.

[0020] Preferably, the second SIM card interface circuit comprises:

[0021] a fifth capacitor, wherein a first end of the fifth capacitor is connected to a connection node between a reset pin of the second SIM card interface and a reset pin of the second built-in SIM card, and a second end of the fifth capacitor is grounded;

[0022] a fourth resistor, wherein a first end of the fourth resistor is connected to a clock pin of the second SIM card interface, and a second end of the fourth resistor is connected to a clock pin of the second built-in SIM card;

[0023] a fifth resistor, wherein a first end of the fifth resistor is connected to a data transmission pin of the second SIM card interface, and a second end of the fifth resistor is connected to a data transmission pin of the second built-in SIM card;

[0024] a sixth resistor, wherein a first end of the sixth resistor is connected to a data transmission pin of the second SIM card interface, and a second end of the sixth resistor is connected to a connection node between a power pin of the second SIM card interface and a power pin of the second built-in SIM card;

[0025] a sixth capacitor, wherein a first end of the sixth capacitor is connected to the second end of the fifth resistor, and a second end of the sixth capacitor is grounded;

[0026] a seventh capacitor, wherein a first end of the seventh capacitor is connected to the second end of the fourth resistor, and a second end of the seventh capacitor is grounded;

[0027] An eighth capacitor, wherein a first end of the eighth capacitor is connected to the second end of the sixth resistor, and a second end of the eighth capacitor is grounded.

[0028] Preferably, the power conversion circuit includes:

[0029] A power conversion chip, wherein a first side of the power conversion chip is connected to the communication chip, a second side of the power conversion chip is connected to the security chip, a first power pin of the power conversion chip is connected to a first power supply voltage, and a second power pin of the power conversion chip is connected to a second power supply voltage;

[0030] a seventh resistor, wherein a first end of the seventh resistor is connected to the first transmission pin of the first side of the power conversion chip, and a second end of the seventh resistor is connected to the output pin of the communication chip;

[0031] an eighth resistor, wherein a first end of the eighth resistor is connected to the second transmission pin of the first side of the power conversion chip, and a second end of the eighth resistor is connected to the clock synchronization pin of the communication chip;

[0032] a ninth resistor, wherein a first end of the ninth resistor is connected to the enable pin of the power conversion chip, and a second end of the ninth resistor is grounded;

[0033] a tenth resistor, wherein a first end of the tenth resistor is connected to the first end of the ninth resistor, and a second end of the tenth resistor is connected to the second supply voltage;

[0034] a ninth capacitor, wherein a first end of the ninth capacitor is connected to the second end of the tenth resistor, and a second end of the ninth capacitor is grounded;

[0035] The third transmission pin on the first side of the power conversion chip is connected to the input pin of the communication chip, and the fourth transmission pin on the first side of the power conversion chip is connected to the chip selection pin of the communication chip.

[0036] Preferably, the power conversion circuit further includes:

[0037] a tenth capacitor, wherein a first end of the tenth capacitor is connected to a first power pin of the power conversion chip, and a second end of the tenth capacitor is grounded;

[0038] an eleventh capacitor, a first end of the eleventh capacitor being connected to the second power pin of the power conversion chip, and a second end of the eleventh capacitor being grounded;

[0039] A twelfth capacitor, wherein a first end of the twelfth capacitor is connected to the first end of the eleventh capacitor, and a second end of the twelfth capacitor is grounded.

[0040] Preferably, the output pin of the safety chip is connected to the first transmission pin on the second side of the power conversion chip, the clock synchronization pin of the safety chip is connected to the second transmission pin on the second side of the power conversion chip, the device selection pin of the safety chip is connected to the fourth transmission pin on the second side of the power conversion chip, and the first power pin of the safety chip is connected to the second power supply voltage; further comprising,

[0041] an eleventh resistor, a first end of the eleventh resistor being connected to an input pin of the safety chip, and a second end of the eleventh resistor being connected to a third transmission pin on the second side of the power conversion chip;

[0042] a twelfth resistor, a first end of the twelfth resistor being connected to the second supply voltage, and a second end of the twelfth resistor being connected to a device selection pin of the security chip;

[0043] A thirteenth capacitor, a first end of the thirteenth capacitor is connected to the first power pin of the security chip, and a second end of the thirteenth capacitor is grounded;

[0044] A fourteenth capacitor, wherein a first end of the fourteenth capacitor is connected to the first power pin of the security chip, and a second end of the fourteenth capacitor is grounded.

[0045] Preferably, it also includes,

[0046] A first transistor, wherein a base of the first transistor is connected to a terminal request output pin of the security chip, a collector of the first transistor is connected to a level conversion pin of the communication chip, and an emitter of the first transistor is grounded;

[0047] A thirteenth resistor, wherein a first end of the thirteenth resistor is connected to the first supply voltage, and a second end of the thirteenth resistor is connected to the collector of the first transistor.

[0048] Preferably, the second power pin of the security chip is connected to the second power supply voltage; and further comprising,

[0049] A second transistor, wherein the base of the second transistor is connected to the reset pin of the communication chip, the collector of the second transistor is connected to the reset pin of the security chip, and the emitter of the second transistor is grounded;

[0050] a fourteenth resistor, a first end of the fourteenth resistor being connected to the second supply voltage, and a second end of the fourteenth resistor being connected to the collector of the second transistor;

[0051] A fifteenth capacitor, a first end of the fifteenth capacitor is connected to the reset pin of the security chip, and a second end of the fifteenth capacitor is grounded;

[0052] A sixteenth capacitor, a first end of the sixteenth capacitor is connected to the second power pin of the security chip, and a second end of the sixteenth capacitor is grounded;

[0053] A seventeenth capacitor, wherein a first end of the seventeenth capacitor is connected to the second power pin of the security chip, and a second end of the seventeenth capacitor is grounded.

[0054] The beneficial effects of the utility model are as follows: due to the adoption of the above technical scheme, the utility model can, under the premise of unchanged hardware design, directly realize the dual-SIM dual-standby function upgrade of the vehicle-mounted terminal by replacing the communication module with one that supports the dual-SIM dual-standby function. The built-in security chip provides communication for end users, and communication security applications provide underlying encryption and decryption services, channel encryption and decryption interfaces, etc., which can ensure the application security of the entire communication module at the bottom level. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 This is a structural diagram of the vehicle terminal communication module in the embodiment of the utility model;

[0056] Figure 2 This is a schematic diagram of the connection of the dual-SIM dual-standby circuit in the embodiment of the utility model;

[0057] Figure 3 This is a schematic diagram of the connection of part of the circuit of the security chip in the embodiment of the utility model. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0059] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0060] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0061] A dual-SIM dual-standby vehicle terminal communication module, such as Figures 1 to 3 As shown, including,

[0062] Communication module 1, communication module 1 is provided with a communication chip U1;

[0063] The first built-in SIM card U4 and the second built-in SIM card U5 are both arranged in the communication module 1. The first built-in SIM card U4 is connected to the first SIM card interface of the communication chip U1, and the second built-in SIM card U5 is connected to the second SIM card interface of the communication chip U1;

[0064] The security chip U2 is disposed in the communication module 1 and is connected to the communication chip U1 via the power conversion circuit 13 .

[0065] Specifically, the utility model sets the first built-in SIM card U4 and the second built-in SIM card U5 in the communication module 1, and adds a dual-card dual-standby software development kit (SDK) in the corresponding communication module 1. The security chip U2 and its related interface circuits are also built into the communication module 1, and a security chip U2 driver software development kit is added in the communication module 1.

[0066] More specifically, the communication module 1 used in the utility model can remove some unnecessary circuits in the existing 5G module, for example, using the Chinese version of the 5G module, remove the radio frequency circuits related to the Japanese frequency band and the South American frequency band, and leave space to embed the first built-in SIM card U4 and the second built-in SIM card U5 and the first SIM card interface circuit 11 and the second SIM card interface circuit 12 while ensuring that the size of the original module remains unchanged, and the connection is achieved after the patch-type SIM cards of different operators are attached to the card slot. And the circuit retains the interface support for the dual SIM cards outside the communication module 1.

[0067] The utility model provides a communication module 1 supporting dual-SIM dual-standby, simplifies the design of external application circuits, and integrates the original dual-SIM dual-standby application circuits into the communication module 1.

[0068] A user of a single card on-board terminal (TBOX) can directly upgrade the dual-SIM dual-standby function of the TBOX by replacing it with the communication module 1 supporting the dual-SIM dual-standby function of the utility model without changing the hardware design.

[0069] By integrating a patch-type SIM card in the communication module 1, for enterprises that have private network operations and patch-type SIM card life cycle and traffic management, end-to-end full-link services can be provided to users, thereby improving business response efficiency.

[0070] Specifically, the security chip U2 provides encryption algorithms, and provides underlying encryption and decryption services, channel encryption and decryption services, etc. for the communication of the communication module 1 and communication security applications, such as TLS encryption and decryption, certificate signature verification, identity authentication, digital wallet, etc.

[0071] More specifically, the utility model provides a dual-SIM dual-standby software SDK based on the original software of the communication module 1, such as enabling the main card, reading dual-SIM information, manual switching of dual cards, automatic switching and cloud switching functions.

[0072] Furthermore, the driver SDK of the security chip U2 is implemented, which is reserved for providing interfaces and adaptation for upper-level application development, such as TLS encryption and decryption, certificate signature verification, identity authentication, digital wallet, etc.

[0073] The built-in security chip U2 and underlying driver provide communication for end users. Communication security applications provide underlying encryption and decryption services, channel encryption and decryption interfaces, etc., which can ensure the application security of the entire communication module 1 at the bottom level.

[0074] Specifically, the patch SIM card is not only used for communication, but also can be added with the function of digital wallet later, that is, the communication module 1 can be built-in to support dual SIM dual standby, and can also support digital wallet applications. The application of the security chip U2 can be expanded to support TLS encryption and decryption, certificate signature verification, identity authentication, digital wallet and other security applications.

[0075] In a preferred embodiment, the first built-in SIM card U4 is connected to the first SIM card interface via the first SIM card interface circuit 11 , and the second built-in SIM card U5 is connected to the second SIM card interface via the second SIM card interface circuit 12 .

[0076] Specifically, the communication module 1 of the utility model is a 5G communication module 1, which is connected to the card slot of the first built-in SIM card U4 through the first SIM card interface circuit 11 and to the card slot of the second built-in SIM card U5 through the second SIM card interface circuit 12, and patch-type SIM cards of different operators are affixed to the card slots to achieve connection with the communication module 1, and the dual-card dual-standby function is supported by the dual-card dual-standby software development kit to support the communication module 1.

[0077] In a preferred embodiment, it also includes a first external SIM card U6 and a second external SIM card U7 located outside the communication module. The first external SIM card U6 is connected to the first SIM card interface via the first SIM card interface circuit 11, and the second external SIM card U7 is connected to the second SIM card interface via the second SIM card interface circuit 12.

[0078] Specifically, the utility model reserves an external SIM card support interface, and the communication module 1 detects whether there is a built-in SIM card through the first SIM card interface circuit 11 and the second SIM card interface circuit 12 to determine whether to use the external SIM card of the communication module 1. If there is, the first built-in SIM card U4 and the second built-in SIM card U5 are used, and if not, the first external SIM card U6 and the second external SIM card U7 are used.

[0079] In a preferred embodiment, the first SIM card interface circuit 11 includes:

[0080] A first capacitor C1, a first end of the first capacitor C1 is connected to a connection node between a reset pin U1_RST1 of the first SIM card interface and a reset pin U4_RST of the first built-in SIM card U4, and a second end of the first capacitor C1 is grounded;

[0081] A first resistor R1, wherein a first end of the first resistor R1 is connected to a clock pin U1_CKL1 of the first SIM card interface, and a second end of the first resistor R1 is connected to a clock pin U4_CLK of the first built-in SIM card U4;

[0082] A second resistor R2, a first end of the second resistor R2 is connected to a data transmission pin U1_DATA1 of the first SIM card interface, and a second end of the second resistor R2 is connected to a data transmission pin U4_I / O of the first built-in SIM card U4;

[0083] A third resistor R3, a first end of the third resistor R3 is connected to the data transmission pin U1_DATA1 of the first SIM card interface, and a second end of the third resistor R3 is connected to a connection node between the power pin U1_VDD1 of the first SIM card interface and the power pin U4_VDD of the first built-in SIM card U4;

[0084] A second capacitor C2, a first end of the second capacitor C2 is connected to the second end of the second resistor R2, and a second end of the second capacitor C2 is grounded;

[0085] A third capacitor C3, a first end of the third capacitor C3 is connected to the second end of the first resistor R1, and a second end of the third capacitor C3 is grounded;

[0086] A fourth capacitor C4, a first end of the fourth capacitor C4 is connected to the second end of the third resistor R3, and a second end of the fourth capacitor C4 is grounded.

[0087] Specifically, the resistance value of the first resistor R1 is 22 ohms, the resistance accuracy is ±1%, and the power rating is 1 / 16 watt; the resistance value of the second resistor R2 is 22 ohms, the resistance accuracy is ±1%, and the power rating is 1 / 16 watt; the resistance value of the third resistor R3 is 15K ohms, the resistance accuracy is ±1%, and the power rating is 1 / 16 watt;

[0088] The capacitance of the first capacitor C1 is 33pF, the capacitance accuracy is ±5%, and the rated working voltage is 50V; the capacitance of the second capacitor C2 is 33pF, the capacitance accuracy is ±5%, and the rated working voltage is 50V; the capacitance of the third capacitor C3 is 33pF, the capacitance accuracy is ±5%, and the rated working voltage is 50V; the capacitance of the fourth capacitor C4 is 1uF, the capacitance accuracy is ±10%, and the rated working voltage is 25V.

[0089] Specifically, the utility model reserves an external SIM card support interface, wherein the reset pin U6_RST of the first external SIM card U6 is connected to the reset pin U4_RST of the first built-in SIM card U4; the clock pin U6_CLK of the first external SIM card U6 is connected to the clock pin U4_CLK of the first built-in SIM card U4; the data transmission pin U6_I / O of the first external SIM card U6 is connected to the data transmission pin U4_I / O of the first built-in SIM card U4; the power pin U6_VDD of the first external SIM card U6 is connected to the power pin U4_VDD of the first built-in SIM card U4.

[0090] The ground pins of the first built-in SIM card U4 including U4_VSS, U4_GND0, U4_GND3, U4_GND1 and the common pin U4_PAD of the first built-in SIM card U4 are all grounded; the ground pins of the first external SIM card U6 including U6_VSS, U6_GND0, U6_GND3, U6_GND1 and the common pin U6_PAD of the first external SIM card U6 are all grounded.

[0091] In a preferred embodiment, the second SIM card interface circuit 12 includes:

[0092] A fifth capacitor C5, a first end of the fifth capacitor C5 is connected to a connection node between a reset pin U1_RST2 of the second SIM card interface and a reset pin U5_RST of the second built-in SIM card U5, and a second end of the fifth capacitor C5 is grounded;

[0093] A fourth resistor R4, a first end of the fourth resistor R4 is connected to a clock pin U1_CLK2 of the second SIM card interface, and a second end of the fourth resistor R4 is connected to a clock pin U5_CLK of the second built-in SIM card U5;

[0094] A fifth resistor R5, a first end of the fifth resistor R5 is connected to a data transmission pin U1_DATA2 of the second SIM card interface, and a second end of the fifth resistor R5 is connected to a data transmission pin U5_I / O of the second built-in SIM card U5;

[0095] a sixth resistor R6, wherein a first end of the sixth resistor R6 is connected to a data transmission pin U1_DATA2 of the second SIM card interface, and a second end of the sixth resistor R6 is connected to a connection node between a power pin U1_VDD2 of the second SIM card interface and a power pin U5_VDD of the second built-in SIM card U5;

[0096] a sixth capacitor C6, wherein a first end of the sixth capacitor C6 is connected to a second end of the fifth resistor R5, and a second end of the sixth capacitor C6 is grounded;

[0097] a seventh capacitor C7, wherein a first end of the seventh capacitor C7 is connected to a second end of the fourth resistor R4, and a second end of the seventh capacitor C7 is grounded;

[0098] An eighth capacitor C8, a first end of the eighth capacitor C8 is connected to the second end of the sixth resistor R6, and a second end of the eighth capacitor C8 is grounded.

[0099] Specifically, the fourth resistor R4 has a resistance of 22 ohms, a resistance accuracy of ±1%, and a power rating of 1 / 16 watt; the fifth resistor R5 has a resistance of 22 ohms, a resistance accuracy of ±1%, and a power rating of 1 / 16 watt; the sixth resistor R6 has a resistance of 15K ohms, a resistance accuracy of ±1%, and a power rating of 1 / 16 watt;

[0100] The capacitance of the fifth capacitor C5 is 33pF, the capacitance accuracy is ±5%, and the rated working voltage is 50V; the capacitance of the sixth capacitor C6 is 33pF, the capacitance accuracy is ±5%, and the rated working voltage is 50V; the capacitance of the seventh capacitor C7 is 33pF, the capacitance accuracy is ±5%, and the rated working voltage is 50V; the capacitance of the eighth capacitor C8 is 1uF, the capacitance accuracy is ±10%, and the rated working voltage is 25V.

[0101] Specifically, the utility model reserves an external SIM card support interface, wherein the reset pin U7_RST of the second external SIM card U7 is connected to the reset pin U5_RST of the second built-in SIM card U5; the clock pin U7_CLK of the second external SIM card U7 is connected to the clock pin U5_CLK of the second built-in SIM card U5; the data transmission pin U7_I / O of the second external SIM card U7 is connected to the data transmission pin U5_I / O of the second built-in SIM card U5; the power pin U7_VDD of the second external SIM card U7 is connected to the power pin U5_VDD of the second built-in SIM card U5.

[0102] The ground pins of the second built-in SIM card U5 including U5_VSS, U5_GND0, U5_GND3, U5_GND1 and the common pin U5_PAD of the second built-in SIM card U5 are all grounded; the ground pins of the second external SIM card U7 including U7_VSS, U7_GND0, U7_GND3, U7_GND1 and the common pin U7_PAD of the second external SIM card U7 are all grounded.

[0103] In a preferred embodiment, the power conversion circuit 13 includes:

[0104] A power conversion chip U3, wherein a first side of the power conversion chip U3 is connected to the communication chip U1, a second side of the power conversion chip U3 is connected to the security chip U2, a first power pin U3_VCCB of the power conversion chip U3 is connected to a first power supply voltage V1, and a second power pin U3_VCCA of the power conversion chip U3 is connected to a second power supply voltage V2;

[0105] A seventh resistor R7, a first end of the seventh resistor R7 is connected to the first transmission pin U3_B1 of the first side of the power conversion chip U3, and a second end of the seventh resistor R7 is connected to the output pin U1_OUT of the communication chip U1;

[0106] An eighth resistor R8, a first end of the eighth resistor R8 is connected to the second transmission pin U3_B2 of the first side of the power conversion chip U3, and a second end of the eighth resistor R8 is connected to the clock synchronization pin U1_SCK of the communication chip U1;

[0107] A ninth resistor R9, wherein a first end of the ninth resistor R9 is connected to an enable pin U3_OE of the power conversion chip U3, and a second end of the ninth resistor R9 is grounded;

[0108] a tenth resistor R10, wherein a first end of the tenth resistor R10 is connected to a first end of the ninth resistor R9, and a second end of the tenth resistor R10 is connected to a second supply voltage V2;

[0109] a ninth capacitor C9, wherein a first end of the ninth capacitor C9 is connected to a second end of the tenth resistor R10, and a second end of the ninth capacitor C9 is grounded;

[0110] The third transmission pin U3_B3 on the first side of the power conversion chip U3 is connected to the input pin U1_IN of the communication chip U1 , and the fourth transmission pin U3_B4 on the first side of the power conversion chip U3 is connected to the chip selection pin U1_CS of the communication chip U1 .

[0111] Specifically, the utility model is equipped with a security chip U2 and a power conversion circuit 13. Since the security chip U2 receives a first power supply voltage V1 (3V power supply in this embodiment) and a second power supply voltage V2 (1.8V power supply in this embodiment), and the communication chip U1 adopts the second power supply voltage V2, a power conversion circuit 13 is required between the security chip U2 and the communication chip U1 to balance the power supply voltage between the two. The power conversion circuit 13 is an optional circuit.

[0112] Specifically, the power conversion chip U3 adopts the TXS0104ERGYR model chip, the ground pins U3_GND and U3_EPAD of the power conversion chip U3 are grounded, the resistance of the seventh resistor R7 is 22 ohms, the resistance accuracy is ±1%, and the power rating is 1 / 16 watt; the resistance of the eighth resistor R8 is 22 ohms, the resistance accuracy is ±1%, and the power rating is 1 / 16 watt; the resistance of the ninth resistor R9 is 100K ohms, the resistance accuracy is ±1%, and the power rating is 1 / 16 watt; the resistance of the tenth resistor R10 is 10K ohms, the resistance accuracy is ±1%, and the power rating is 1 / 16 watt.

[0113] The ninth capacitor C9 has a capacitance of 0.1uF, a capacitance accuracy of ±10%, and a rated operating voltage of 16V.

[0114] In a preferred embodiment, the power conversion circuit 13 further includes:

[0115] A tenth capacitor C10, a first end of the tenth capacitor C10 is connected to a first power pin U3_VCCB of the power conversion chip U3, and a second end of the tenth capacitor C10 is grounded;

[0116] An eleventh capacitor C11, a first end of the eleventh capacitor C11 is connected to a second power pin U3_VCCA of the power conversion chip U3, and a second end of the eleventh capacitor C11 is grounded;

[0117] a twelfth capacitor C12, wherein a first end of the twelfth capacitor C12 is connected to the first end of the eleventh capacitor C11, and a second end of the twelfth capacitor C12 is grounded;

[0118] The capacitance of the tenth capacitor C10 is 0.1uF, the capacitance accuracy is ±10%, and the rated working voltage is 16V; the capacitance of the eleventh capacitor C11 is 100pF, the capacitance accuracy is ±5%, and the rated working voltage is 50V; the capacitance of the twelfth capacitor C12 is 0.1uF, the capacitance accuracy is ±10%, and the rated working voltage is 16V.

[0119] In a preferred embodiment, the output pin U2_MOSI of the security chip U2 is connected to the first transmission pin U3_A1 on the second side of the power conversion chip U3, the clock synchronization pin U2_SCK of the security chip U2 is connected to the second transmission pin U3_A2 on the second side of the power conversion chip U3, the device selection pin U2_SS of the security chip U2 is connected to the fourth transmission pin U3_A4 on the second side of the power conversion chip U3, and the first power pin U2_VCC1 of the security chip U2 is connected to the second power supply voltage V2; it also includes,

[0120] An eleventh resistor R11, a first end of the eleventh resistor R11 is connected to the input pin U2_MISO of the security chip U2, and a second end of the eleventh resistor R11 is connected to the third transmission pin U3_A3 of the second side of the power conversion chip U3;

[0121] A twelfth resistor R12, wherein a first end of the twelfth resistor R12 is connected to the second power supply voltage V2, and a second end of the twelfth resistor R12 is connected to a device selection pin U2_SS of the security chip U2;

[0122] A thirteenth capacitor C13, a first end of the thirteenth capacitor C13 is connected to the first power pin U2_VCC1 of the security chip U2, and a second end of the thirteenth capacitor C13 is grounded;

[0123] A fourteenth capacitor C14 , a first end of the fourteenth capacitor C14 is connected to the first power pin U2_VCC1 of the security chip U2 , and a second end of the fourteenth capacitor C14 is grounded.

[0124] Specifically, the ground pin of the security chip U2 is grounded, the resistance of the eleventh resistor R11 is 22 ohms, the resistance accuracy is ±1%, and the power rating is 1 / 16 watt; the capacitance of the thirteenth capacitor C13 is 0.1uF, the capacitance accuracy is ±10%, and the rated working voltage is 16V; the capacitance of the fourteenth capacitor C14 is 4.7uF, the capacitance accuracy is ±10%, and the rated working voltage is 25V.

[0125] In a preferred embodiment, it also includes:

[0126] A first transistor Q1, the base of the first transistor Q1 is connected to the terminal request output pin U2_IRO of the security chip U2, the collector of the first transistor Q1 is connected to the level conversion pin U1_REDY of the communication chip U1, and the emitter of the first transistor Q1 is grounded;

[0127] The thirteenth resistor R13 , a first end of the thirteenth resistor R13 is connected to the first power supply voltage V1 , and a second end of the thirteenth resistor R13 is connected to the collector of the first transistor Q1 .

[0128] Specifically, the model of the first transistor Q1 is DTC114YETL, the resistance of the thirteenth resistor R13 is 47K ohms, the resistance accuracy is ±1%, and the power rating is 1 / 16 watt.

[0129] In a preferred embodiment, the second power pin U2_VCC2 of the security chip U2 is connected to the second power supply voltage V2; further comprising,

[0130] A second transistor Q2, the base of the second transistor Q2 is connected to the reset pin U1_RST3 of the communication chip U1, the collector of the second transistor Q2 is connected to the reset pin U2_RST of the security chip U2, and the emitter of the second transistor Q2 is grounded;

[0131] a fourteenth resistor R14, wherein a first end of the fourteenth resistor R14 is connected to the second power supply voltage V2, and a second end of the fourteenth resistor R14 is connected to the collector of the second transistor Q2;

[0132] A fifteenth capacitor C15, a first end of the fifteenth capacitor C15 is connected to a reset pin U2_RST of the security chip U2, and a second end of the fifteenth capacitor C15 is grounded;

[0133] A sixteenth capacitor C16, a first end of the sixteenth capacitor C16 is connected to the second power pin U2_VCC2 of the security chip U2, and a second end of the sixteenth capacitor C16 is grounded;

[0134] The seventeenth capacitor C17, a first end of the seventeenth capacitor C17 is connected to the second power pin U2_VCC2 of the security chip U2, and a second end of the seventeenth capacitor C17 is grounded.

[0135] Specifically, the model of the second transistor Q2 is DTC114YETL, the resistance of the fourteenth resistor R14 is 4.7K ohms, the resistance accuracy is ±1%, and the power rating is 1 / 16 watt; the capacitance of the fifteenth capacitor C15 is 0.1uF, the capacitance accuracy is ±10%, and the rated working voltage is 16V; the capacitance of the sixteenth capacitor C16 is 4.7uF, the capacitance accuracy is ±10%, and the rated working voltage is 25V; the capacitance of the seventeenth capacitor C17 is 0.1uF, the capacitance accuracy is ±10%, and the rated working voltage is 16V.

[0136] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-SIM dual-standby vehicle terminal communication module, characterized in that: include: A communication module (1), wherein a communication chip (U1) is provided in the communication module (1); A first built-in SIM card (U4) and a second built-in SIM card (U5), both of which are arranged in the communication module (1), the first built-in SIM card (U4) being connected to a first SIM card interface of the communication chip (U1), and the second built-in SIM card (U5) being connected to a second SIM card interface of the communication chip (U1); A safety chip (U2) is arranged in the communication module (1) and is connected to the communication chip (U1) via a power conversion circuit (13).

2. The dual-SIM dual-standby vehicle terminal communication module according to claim 1, characterized in that: The first built-in SIM card (U4) is connected to the first SIM card interface via a first SIM card interface circuit (11), and the second built-in SIM card (U5) is connected to the second SIM card interface via a second SIM card interface circuit (12).

3. The dual-SIM dual-standby vehicle terminal communication module according to claim 2, characterized in that: It also includes a first external SIM card (U6) and a second external SIM card (U7) located outside the communication module, wherein the first external SIM card (U6) is connected to the first SIM card interface via the first SIM card interface circuit (11), and the second external SIM card (U7) is connected to the second SIM card interface via the second SIM card interface circuit (12).

4. The dual-SIM dual-standby vehicle terminal communication module according to claim 2, characterized in that: The first SIM card interface circuit (11) comprises: a first capacitor (C1), wherein a first end of the first capacitor (C1) is connected to a connection node between a reset pin (U1_RST1) of the first SIM card interface and a reset pin (U4_RST) of the first built-in SIM card (U4), and a second end of the first capacitor (C1) is grounded; A first resistor (R1), wherein a first end of the first resistor (R1) is connected to a clock pin (U1_CLK1) of the first SIM card interface, and a second end of the first resistor (R1) is connected to a clock pin (U4_CLK) of the first built-in SIM card (U4); a second resistor (R2), wherein a first end of the second resistor (R2) is connected to a data transmission pin (U1_DATA1) of the first SIM card interface, and a second end of the second resistor (R2) is connected to a data transmission pin (U4_I / O) of the first built-in SIM card (U4); a third resistor (R3), wherein a first end of the third resistor (R3) is connected to a data transmission pin (U1_DATA1) of the first SIM card interface, and a second end of the third resistor (R3) is connected to a connection node between a power pin (U1_VDD1) of the first SIM card interface and a power pin (U4_VDD) of the first built-in SIM card (U4); a second capacitor (C2), wherein a first end of the second capacitor (C2) is connected to a second end of the second resistor (R2), and a second end of the second capacitor (C2) is grounded; a third capacitor (C3), wherein a first end of the third capacitor (C3) is connected to the second end of the first resistor (R1), and a second end of the third capacitor (C3) is grounded; A fourth capacitor (C4), wherein a first end of the fourth capacitor (C4) is connected to the second end of the third resistor (R3), and a second end of the fourth capacitor (C4) is grounded.

5. The dual-SIM dual-standby vehicle terminal communication module according to claim 2, characterized in that: The second SIM card interface circuit (12) comprises: a fifth capacitor (C5), wherein a first end of the fifth capacitor (C5) is connected to a connection node between a reset pin (U1_RST2) of the second SIM card interface and a reset pin (U5_RST) of the second built-in SIM card (U5), and a second end of the fifth capacitor (C5) is grounded; a fourth resistor (R4), a first end of the fourth resistor (R4) connected to a clock pin (U1_CLK2) of the second SIM card interface, and a second end of the fourth resistor (R4) connected to a clock pin (U5_CLK) of the second built-in SIM card (U5); a fifth resistor (R5), wherein a first end of the fifth resistor (R5) is connected to a data transmission pin (U1_DATA2) of the second SIM card interface, and a second end of the fifth resistor (R5) is connected to a data transmission pin (U5_I / O) of the second built-in SIM card (U5); a sixth resistor (R6), a first end of the sixth resistor (R6) connected to a data transmission pin (U1_DATA2) of the second SIM card interface, and a second end of the sixth resistor (R6) connected to a connection node between a power pin (U1_VDD2) of the second SIM card interface and a power pin (U5_VDD) of the second built-in SIM card (U5); a sixth capacitor (C6), wherein a first end of the sixth capacitor (C6) is connected to a second end of the fifth resistor (R5), and a second end of the sixth capacitor (C6) is grounded; a seventh capacitor (C7), wherein a first end of the seventh capacitor (C7) is connected to the second end of the fourth resistor (R4), and a second end of the seventh capacitor (C7) is grounded; An eighth capacitor (C8), wherein a first end of the eighth capacitor (C8) is connected to the second end of the sixth resistor (R6), and a second end of the eighth capacitor (C8) is grounded.

6. The dual-SIM dual-standby vehicle terminal communication module according to claim 1, characterized in that: The power conversion circuit (13) comprises: A power conversion chip (U3), wherein a first side of the power conversion chip (U3) is connected to the communication chip (U1), a second side of the power conversion chip (U3) is connected to the security chip (U2), a first power pin (U3_VCCB) of the power conversion chip (U3) is connected to a first power supply voltage (V1), and a second power pin (U3_VCCA) of the power conversion chip (U3) is connected to a second power supply voltage (V2); a seventh resistor (R7), wherein a first end of the seventh resistor (R7) is connected to a first transmission pin (U3_B1) on a first side of the power conversion chip (U3), and a second end of the seventh resistor (R7) is connected to an output pin (U1_OUT) of the communication chip (U1); an eighth resistor (R8), a first end of the eighth resistor (R8) being connected to a second transmission pin (U3_B2) on a first side of the power conversion chip (U3), and a second end of the eighth resistor (R8) being connected to a clock synchronization pin (U1_SCK) of the communication chip (U1); a ninth resistor (R9), wherein a first end of the ninth resistor (R9) is connected to an enable pin (U3_OE) of the power conversion chip (U3), and a second end of the ninth resistor (R9) is grounded; a tenth resistor (R10), wherein a first end of the tenth resistor (R10) is connected to a first end of the ninth resistor (R9), and a second end of the tenth resistor (R10) is connected to the second supply voltage (V2); a ninth capacitor (C9), wherein a first end of the ninth capacitor (C9) is connected to a second end of the tenth resistor (R10), and a second end of the ninth capacitor (C9) is grounded; The third transmission pin (U3_B3) on the first side of the power conversion chip (U3) is connected to the input pin (U1_IN) of the communication chip (U1), and the fourth transmission pin (U3_B4) on the first side of the power conversion chip (U3) is connected to the chip select pin (U1_CS) of the communication chip (U1).

7. The dual-SIM dual-standby vehicle terminal communication module according to claim 6, characterized in that: The power conversion circuit (13) further includes: a tenth capacitor (C10), wherein a first end of the tenth capacitor (C10) is connected to a first power pin (U3_VCCA) of the power conversion chip (U3), and a second end of the tenth capacitor (C10) is grounded; an eleventh capacitor (C11), a first end of the eleventh capacitor (C11) being connected to a second power pin (U3_VCCA) of the power conversion chip (U3), and a second end of the eleventh capacitor (C11) being grounded; A twelfth capacitor (C12), wherein a first end of the twelfth capacitor (C12) is connected to the first end of the eleventh capacitor (C11), and a second end of the twelfth capacitor (C12) is grounded.

8. The dual-SIM dual-standby vehicle terminal communication module according to claim 6, characterized in that: The output pin (U2_MOSI) of the security chip (U2) is connected to the first transmission pin (U3_A1) on the second side of the power conversion chip (U3), the clock synchronization pin (U2_SCK) of the security chip (U2) is connected to the second transmission pin (U3_A2) on the second side of the power conversion chip (U3), the device selection pin (U2_SS) of the security chip (U2) is connected to the fourth transmission pin (U3_A4) on the second side of the power conversion chip (U3), and the first power pin (U2_VCC1) of the security chip (U2) is connected to the second power supply voltage (V2); and include, an eleventh resistor (R11), a first end of the eleventh resistor (R11) being connected to an input pin (U2_MISO) of the safety chip (U2), and a second end of the eleventh resistor (R11) being connected to a third transmission pin (U3_A3) on the second side of the power conversion chip (U3); a twelfth resistor (R12), a first end of the twelfth resistor (R12) being connected to the second supply voltage (V2), and a second end of the twelfth resistor (R12) being connected to a device selection pin (U2_SS) of the security chip (U2); a thirteenth capacitor (C13), wherein a first end of the thirteenth capacitor (C13) is connected to a first power pin (U2_VCC1) of the security chip (U2), and a second end of the thirteenth capacitor (C13) is grounded; A fourteenth capacitor (C14), wherein a first end of the fourteenth capacitor (C14) is connected to a first power pin (U2_VCC1) of the security chip (U2), and a second end of the fourteenth capacitor (C14) is grounded.

9. The dual-SIM dual-standby vehicle terminal communication module according to claim 6, characterized in that: Also includes, A first transistor (Q1), wherein a base of the first transistor (Q1) is connected to a terminal request output pin (U2_IRO) of the security chip (U2), a collector of the first transistor (Q1) is connected to a level conversion pin (U1_REDY) of the communication chip (U1), and an emitter of the first transistor (Q1) is grounded; A thirteenth resistor (R13), wherein a first end of the thirteenth resistor (R13) is connected to the first power supply voltage (V1), and a second end of the thirteenth resistor (R13) is connected to the collector of the first transistor (Q1).

10. The dual-SIM dual-standby vehicle terminal communication module according to claim 6, characterized in that: The second power supply pin (U2_VCC2) of the security chip (U2) is connected to the second power supply voltage (V2); and further includes, a second transistor (Q2), wherein the base of the second transistor (Q2) is connected to the reset pin (U1_RST3) of the communication chip (U1), the collector of the second transistor (Q2) is connected to the reset pin (U2_RST) of the security chip (U2), and the emitter of the second transistor (Q2) is grounded; a fourteenth resistor (R14), a first end of the fourteenth resistor (R14) being connected to the second power supply voltage (V2), and a second end of the fourteenth resistor (R14) being connected to the collector of the second transistor (Q2); a fifteenth capacitor (C15), wherein a first end of the fifteenth capacitor (C15) is connected to a reset pin (U2_RST) of the security chip (U2), and a second end of the fifteenth capacitor (C15) is grounded; a sixteenth capacitor (C16), wherein a first end of the sixteenth capacitor (C16) is connected to a second power pin (U2_VCC2) of the security chip (U2), and a second end of the sixteenth capacitor (C16) is grounded; A seventeenth capacitor (C17), wherein a first end of the seventeenth capacitor (C17) is connected to a second power pin (U2_VCC2) of the security chip (U2), and a second end of the seventeenth capacitor (C17) is grounded.

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