Communication module and terminal equipment
By setting a switch between the baseband chip and the card slot module, low-cost switching of multiple USIM interfaces in the Cat1 communication module is achieved, which solves the need for multi-carrier networking of terminal equipment and reduces circuit costs.
Patent Information
- Application Number
- CN202520388425.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-06
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-06
AI Technical Summary
Due to strict cost requirements, the Cat1 communication module's multi-USIM interface solution cannot meet the networking needs of terminal devices. Existing technologies, by reducing USIM card resources and supporting only a single interface, cannot meet the needs of switching between multiple operators.
Design a communication module that enables the selection and switching of the card slot module by setting a switch between the baseband chip and the card slot module, eliminating the need for a signal selection circuit and supporting a low-cost configuration of at least two USIM interfaces.
This technology enables terminal devices to support switching between multiple USIM interfaces without increasing circuit costs, meeting the networking needs of multiple operator networks and reducing costs.
Smart Images
Figure CN223829308U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electronic communication, and in particular to a communication module and a terminal device. BACKGROUND
[0002] In the Internet of Things industry, a communication module plays a key role in data transmission and data exchange and remote management functions between devices. For the communication module, a Universal Subscriber Identity Module (USIM) interface is indispensable. Without the USIM interface, the communication module cannot be connected to the network for communication, thereby losing its value and significance.
[0003] Due to competition among communication industry operators, some regions may lack a certain communication operator, so the terminal device may need to reserve multiple USIM interfaces to adapt to different communication operators, so as to switch to the USIM interface corresponding to other operators for networking when the terminal device cannot be connected to the network using a certain communication operator.
[0004] For Cat1 communication modules, due to fierce competition, the cost requirement is relatively strict, and the platform reduces the USIM card resources for cost optimization, so that many platforms only support a single USIM interface, which cannot meet the networking needs of the terminal device. CONTENT OF THE UTILITY MODEL
[0005] The embodiments of the present application provide a communication module and a terminal device to meet the demand of the terminal device for configuring at least two communication interfaces at a low cost.
[0006] To solve the above technical problems, the embodiments of the present application provide the following technical solutions:
[0007] The first aspect of the present application provides a communication module, comprising: a baseband chip; a first card slot module and a second card slot module respectively coupled with the baseband chip; the first card slot module has a first switch therein, the first switch connects the second card slot module and the baseband chip, and the first card slot module is configured to change the switch state of the first switch in response to whether the first card slot module is connected to a communication card, the switch state of the first switch comprising a first state and a second state; when the first switch is in the first state or the second state, the first card slot module and the baseband chip constitute a communication loop; and when the first switch is in the second state, the second card slot module and the baseband chip constitute a communication loop.
[0008] In some embodiments, the first state is an open state and the second state is a closed state; the first switch is configured to: in response to the first card slot module being connected to a communication card, the first switch is placed in the first state; or, in response to the first card slot module not being connected to a communication card, the first switch is placed in the second state.
[0009] In some embodiments, the first card slot module includes a first card slot and the first switch disposed in the first card slot.
[0010] In some embodiments, the second card slot module includes a second card slot, the identification terminal of the first card slot is connected to the ground terminal of the second card slot and the first terminal of the first switch, and the second terminal of the first switch is connected to the ground terminal of the first card slot and the ground terminal of the baseband chip.
[0011] In some embodiments, the identification terminal of the baseband chip is connected to the identification terminal of the first card slot and the identification power supply.
[0012] In some embodiments, the communication module further includes a protection resistor, the first end of which is connected to the identification terminal of the baseband chip, and the second end of which is connected to the identification power supply.
[0013] In some embodiments, the second card slot module has a second switch, and the second card slot module is configured to: change the switch state of the second switch in response to whether a communication card is connected to the second card slot module, the switch state of the second switch including a third state and a fourth state; when the first switch is in the first state, the first card slot module and the baseband chip form a communication loop; when the first switch is in the second state and the second switch is in the third state, the second card slot module and the baseband chip form a communication loop.
[0014] In some embodiments, the third state is an open state and the fourth state is a closed state; the second switch is configured to: in response to the second card slot module receiving a communication card, the second switch is placed in the third state; or, in response to the second card slot module not receiving a communication card, the second switch is placed in the fourth state.
[0015] In some embodiments, the second card slot module includes a second card slot and the second switch disposed in the second card slot.
[0016] The second aspect of this application provides a terminal device, including the communication module provided in the first aspect above.
[0017] The communication module provided in this application enables the selection of the first card slot module and the second card slot module based on whether a communication card is connected to the first card slot module. The switching between the first card slot module and the second card slot module does not require a signal selection circuit. It achieves the access of dual card slot modules without the need for a signal selection circuit and other additional components, resulting in lower cost and greater practicality. Attached Figure Description
[0018] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.
[0019] Figure 1 A schematic diagram of the module structure of a communication module with dual communication interfaces provided in an embodiment of this application;
[0020] Figure 2 A schematic diagram of the specific structure of the communication module when the first switch is in the off state, as provided in the embodiments of this application;
[0021] Figure 3 A schematic diagram of the specific structure of the communication module when the first switch is in the closed state, as provided in the embodiments of this application;
[0022] Figure 4 A schematic diagram of the structure of a communication module including multiple card slot modules provided for embodiments of this application;
[0023] Figure 5 A schematic diagram of the module structure of a communication module including a second switch, provided for an embodiment of this application;
[0024] Figure 6 A schematic diagram of the specific structure of the communication module including the second switch provided in the embodiments of this application. Detailed Implementation
[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0026] As is known from the background technology, terminal devices may need to reserve multiple USIM interfaces to adapt to different communication operators, so that when the terminal device cannot connect to the network using a certain communication operator, it can switch to the USIM interface of other operators to connect to the network; therefore, the solution of configuring terminal devices with at least two USIM interfaces is becoming more and more popular.
[0027] In one example, if the terminal device is configured with two USIM interfaces (a first USIM interface and a second USIM interface), the terminal device also needs to set up a corresponding signal selection circuit to select whether to connect the first USIM interface to the baseband chip for networking via a communication card connected to the first USIM interface, or to connect the second USIM interface to the baseband chip for networking via a communication card connected to the second USIM interface. Terminal devices with multiple USIM interfaces require additional signal selection circuitry compared to those with a single USIM interface, increasing circuit costs.
[0028] Cat1 communication modules have strict cost requirements, and multi-USIM interface solutions do not meet the cost requirements of Cat1 communication modules. In order to optimize costs, platforms have reduced USIM card resources, resulting in many platforms only supporting a single USIM interface, which cannot meet the networking requirements of terminal devices. Therefore, there is an urgent need for a solution that can achieve low cost and allow terminal devices to be configured with at least two USIM interfaces.
[0029] This application provides a communication module that enables terminal devices to be configured with at least two communication interfaces at low cost.
[0030] It should be noted that the communication module 10 provided in this application is compatible with Cat1 communication modules and other communication modules. The description in this application using the low cost requirement of Cat1 communication modules as an example is only used to highlight the low cost of the communication module provided in this application, and is not only applicable to Cat1 communication modules.
[0031] In some embodiments, the communication module includes: a baseband chip; a first card slot module and a second card slot module respectively coupled to the baseband chip; the first card slot module has a first switch, the first switch connecting the second card slot module and the baseband chip, and the first card slot module is configured to: change the switching state of the first switch in response to whether a communication card is connected to the first card slot module, the switching state of the first switch including a first state and a second state; when the first switch is in the first state or the second state, the first card slot module and the baseband chip form a communication loop; when the first switch is in the second state, the second card slot module and the baseband chip form a communication loop.
[0032] Figure 1 This is a schematic diagram of the module structure of the communication module with dual communication interfaces provided in this embodiment, as shown below. Figure 1 As shown, the communication module 10 includes: a baseband chip 100, a first card slot module 110, and a second card slot module 120.
[0033] The baseband chip 100 is coupled to the first card slot module 110 and the second card slot module 120. The first card slot module 110 has a first switch K1, which connects the second card slot module 120 and the baseband chip 100. The first card slot module 110 is configured to change the switching state of the first switch K1 in response to whether a communication card is connected to the first card slot module 110. The switching state of the first switch K1 includes a first state and a second state. When the first switch K1 is in the first state or the second state, the first card slot module 110 and the baseband chip form a communication loop. When the first switch K1 is in the second state, the second card slot module 120 and the baseband chip form a communication loop.
[0034] Specifically, refer to Figure 1 To illustrate, in one example, when a communication card is connected to the first card slot module 110, the first switch K1 is in the first state; when no communication card is connected to the first card slot module 110, the first switch K1 is in the second state.
[0035] It should be noted that since the first switch K1 does not affect the connection between the first card slot module 110 and the baseband chip 100, the first card slot module 110 and the baseband chip 100 form a communication loop regardless of whether the first switch K1 is in the first state or the second state.
[0036] Specifically, when the first switch K1 is in the first state, the first card slot module 110 connects to a communication card, and the communication card connected to the first card slot module 110 communicates with the baseband chip 100, thereby enabling the communication card to connect to the network. When the first switch K1 is in the second state, the first card slot module 110 does not connect to a communication card. Although the first card slot module 110 forms a communication loop with the baseband chip 100, it does not connect to the network and cannot connect to the network. When the first switch K2 is in the second state, the second card slot module 120 forms a communication loop with the baseband chip 100. If the second card slot module 120 connects to a communication card at this time, the communication card connected to the second card slot module 120 communicates with the baseband chip 100, thereby enabling the communication card to connect to the network. If the second card slot module 120 does not connect to a communication card at this time, although it forms a communication loop with the baseband chip 100, it does not connect to the network and cannot connect to the network.
[0037] In other words, the first card slot module 110 always forms a communication loop with the baseband chip 100. When a communication card is connected to the first card slot module 110, the communication card connected to the first card slot module 110 communicates with the baseband chip 100, and the connection of the communication card causes the first switch K1 to be in the first state, disconnecting the communication loop between the second card slot module 120 and the baseband chip 100. At this time, regardless of whether a communication card is connected to the second card slot module 120, the baseband chip 100 only communicates with the communication card connected to the first card slot module 110. When a communication card is not connected to the first card slot module 110 but a communication card is connected to the second card slot module 120, the first switch K1 is in the second state, the second card slot module 120 and the baseband chip 120 form a communication loop, and the communication card connected to the second card slot module 120 communicates with the baseband chip.
[0038] Based on the above discussion, the communication module 10 has three working states depending on whether the communication card is connected to the first card slot module 110 and the second card slot module 120: (1) When the communication card is not connected to the first card slot module 110 and the second card slot module 120; at this time, the first switch K1 is in the second state, and both the first card slot module 110 and the second card slot module 120 are connected to the baseband chip 100, but since there is no communication card connected, neither the first card slot module 110 nor the second card slot module 120 can connect to the network. (2) When the communication card is connected to the first card slot module 110; based on (1), since the communication card is connected to the first card slot module 110, the communication card connected to the first card slot module 110 can connect to the network; in addition, since the first card slot module 110 is connected to the communication card, the first switch K1 changes to the first state, and the first switch K1 disconnects the communication loop between the baseband chip 100 and the second card slot module 120. At this time, regardless of whether the communication card is connected to the second card slot module 120, the communication card corresponding to the second card slot module cannot connect to the network. (3) When the communication card is connected to the second card slot module 120; based on (1), since the communication card is connected to the second card slot module 120, the communication card connected to the second card slot module 120 is connected to the network.
[0039] In summary, the communication module 10 provided in this embodiment enables the selection of the first card slot module 110 and the second card slot module 120 based on whether a communication card is connected to the first card slot module 110. The switching between the first card slot module 110 and the second card slot module 120 does not require a signal selection circuit. The access of the dual card slot module is achieved without the need for a signal selection circuit and other additional components, resulting in lower cost and greater practicality.
[0040] In some embodiments, the first state is an open state and the second state is a closed state. The first switch K1 is configured to: in response to a communication card being connected to the first card slot module 110, the first switch K1 is placed in the first state, i.e., the open state. Alternatively, the first switch K1 is configured to: in response to a communication card not being connected to the first card slot module 110, the first switch K1 is placed in the second state, i.e., the closed state.
[0041] It should be noted that in other embodiments, the circuit can also be adjusted so that the first state is a closed state and the second state is an open state; regardless of the specific state of the first switch, any switching scheme with the same switching logic as this application should fall within the protection scope of this application.
[0042] refer to Figure 1 When a communication card is connected to the first card slot module 110, the first switch K1 is in the off state. At this time, the first card slot module 110 and the baseband chip 100 form a communication loop, and the communication card connected to the first card slot module 110 is connected to the baseband chip 100. When no communication card is connected to the first card slot module 110, the first switch K1 is in the closed state. At this time, the first card slot module 110 and the second card slot module 120 form a loop with the baseband chip 100, but at this time, the communication card is connected to the second card slot module 120, that is, the communication card connected to the second card slot module 120 is connected to the baseband chip 100.
[0043] Figure 2 and Figure 3 This is a schematic diagram of the specific structure of the communication module provided in this embodiment, as shown below. Figure 2 and Figure 3 As shown, in some embodiments, the first card slot module 110 includes a first card slot 201 and a first switch K1 disposed in the first card slot 201. The second card slot module 120 includes a second card slot 202.
[0044] By placing the first switch K1 in the first card slot 201, the state of the first switch K1 can be changed directly based on whether a communication card is connected to the first card slot 201, thus eliminating the need to send a control signal to change the state of the first switch K1 by detecting whether a communication card is connected to the first card slot 201.
[0045] In some embodiments, the first card slot 201 and the second card slot 202 include a global identification card slot, i.e., a USIM card slot; the communication card is a global identification card, i.e., a USIM card.
[0046] It should be noted that, Figure 2 and Figure 3The example uses a USIM card slot and a USIM card as examples for illustration, and does not constitute a limitation on the communication module 10 provided in this embodiment. In specific applications, the communication module 10 mentioned in this embodiment is also applicable to other types of communication card slots and communication cards.
[0047] Continue to refer to Figure 2 and Figure 3 The baseband chip 100 includes a ground terminal GND, a power terminal USIM VDD, a reset terminal USIMRST, a clock terminal USIM CLK, and a data terminal USIM DATA. The first card slot 201 and the second card slot 202 each include a first power terminal VCC, a reset terminal RST, a clock terminal CLK, a data interface I / O, a second power terminal VPP, and a ground terminal GND. Specifically, the power terminal USIM VDD of the baseband chip 100 is connected to the first power terminal VCC of both the first card slot 201 and the second card slot 202; the reset terminal USIM RST of the baseband chip 100 is connected to the reset terminal RST of both the first card slot 201 and the second card slot 202; the clock terminal USIM CLK of the baseband chip 100 is connected to the clock terminal CLK of both the first card slot 201 and the second card slot 202; and the data terminal USIMDATA of the baseband chip 100 is connected to the data interface I / O of both the first card slot 201 and the second card slot 202.
[0048] In some embodiments, the first card slot 201 further includes an identification terminal CD, the identification terminal CD of the first card slot 201 is connected to the ground terminal GND of the second card slot 202 and the first terminal of the first switch K1, and the second terminal of the first switch K1 is connected to the ground terminal GND of the first card slot K1 and the ground terminal GND of the baseband chip 100.
[0049] Based on the preceding content, for reference Figure 2 When a communication card is inserted into the first card slot 201, the first switch K1 is in the open state. At this time, only the ground terminal GND of the first card slot 201 is connected to the ground terminal GND of the baseband chip 100, and the communication card inserted into the first card slot 201 is connected to the baseband chip 100; Reference Figure 3 When no communication card is connected to the first card slot 201, the first switch K1 is in the closed state. At this time, the grounding terminal GND of the first card slot 201 and the second card slot 202 is connected to the grounding terminal GND of the baseband chip 100. Since no communication card is connected to the first card slot 201 at this time, the communication card connected to the second card slot 202 is connected to the baseband chip 100.
[0050] In some embodiments, the baseband chip 100 further includes an identification terminal USIM DET, which is connected to the identification terminal CD and the identification power supply USIM VDD of the first card slot 201.
[0051] When a communication card is connected to the first card slot 201, causing the first switch K1 to be in the open state, the identification terminal USIM DET of the baseband chip 100 cannot be connected to the ground terminal GND of the baseband chip 100 to form a discharge circuit. The identification terminal USIM DET of the baseband chip 100 is pulled up by the identification power supply USIM VDD and presents a high level. When a communication card is not connected to the first card slot 201, causing the first switch K1 to be in the closed state, the identification terminal USIM DET of the baseband chip 100 is connected to the ground terminal GND of the baseband chip 100 to form a discharge circuit. The identification terminal USIM DET of the baseband chip 100 is pulled down by the ground terminal GND of the baseband chip 100 and presents a low level.
[0052] By setting a corresponding identification circuit for the baseband chip 100, the baseband chip can perform a card identification process based on the module software. The level at the USIM DET terminal of the baseband chip 100 can be used to identify whether the current communication card is connected to the first card slot 201 or the second card slot 202.
[0053] In some embodiments, the communication module 10 further includes a protection resistor. The first end of the protection resistor is connected to the identification terminal USIM DET of the baseband chip 100, and the second end of the protection resistor is connected to the identification power supply USIM VDD. By setting the protection resistor, excessive current in the identification circuit can be avoided, thus preventing safety hazards.
[0054] In some embodiments, the protection resistor is 15KΩ. It should be noted that... Figure 2 and Figure 3 The resistance value of the protection resistor in the example does not constitute a limitation on this embodiment. In specific applications, the resistance value of the protection resistor can be set according to the voltage value of the identification power supply USIM VDD and the safe current allowed in the identification circuit.
[0055] Figure 4 This is a schematic diagram of the communication module including multiple card slot modules provided in this embodiment, as shown below. Figure 4 As shown, the communication module 10 also includes a third card slot module 130, wherein the third card slot module 130 and the second card slot module 120 are connected in parallel.
[0056] As described above, when a communication card is connected to the first card slot module 110, the first switch K1 is in the open state. At this time, only the first card slot module 110 and the baseband chip 100 form a communication loop, meaning the communication card connected to the first card slot module 110 is connected to the baseband chip 100. When no communication card is connected to the first card slot module 110, the first switch K1 is in the closed state. At this time, the first card slot module 110, the second card slot module 120, and the third card slot module 130 form a communication loop with the baseband chip 100. The communication card connected to the second card slot module 120 or the third card slot module 130 is connected to the baseband chip 100.
[0057] It should be noted that, Figure 4 Using three card slot modules as an example does not constitute a limitation of this embodiment. In specific applications, multiple card slot modules can be connected to the baseband chip 100 by connecting subsequent card slots in parallel with the second card slot module 120, depending on the required number of card slot modules.
[0058] Figure 5 This embodiment provides a schematic diagram of the module structure of the communication module including the second switch, as shown below. Figure 5 As shown, the second card slot module 120 has a second switch K2. The second card slot module 120 is configured to change the switching state of the second switch K2 in response to whether a communication card is connected to the second card slot module 120. The switching state of the second switch K2 includes a third state and a fourth state. When the first switch K1 is in the first state, the first card slot module 110 and the baseband chip 100 form a communication loop. When the first switch K1 is in the second state and the second switch K2 is in the third state, the second card slot 120 and the baseband chip 100 form a communication loop.
[0059] In one example, when a communication card is connected to the second card slot module 120, the second switch K2 is in the third state; when no communication card is connected to the second card slot module 120, the second switch K2 is in the fourth state.
[0060] Specifically, the first state or the second state of the first switch K1 indicates whether the first card slot module 110 is connected to a communication card, and the third state or the fourth state of the second switch K2 indicates whether the second card slot module 120 is connected to a communication card.
[0061] In some embodiments, the third state is an open state and the fourth state is a closed state. The second switch K2 is configured to: in response to the second card slot module 120 receiving a communication card, the second switch K2 is placed in the third state, i.e., the open state. Alternatively, the second switch K2 is configured to: in response to the second card slot module 120 not receiving a communication card, the second switch K2 is placed in the fourth state, i.e., the closed state.
[0062] Combination Figure 4 andFigure 5 When the communication module includes a third card slot module 130 or more card slot modules, the corresponding card slot modules can also be equipped with switches. For example, the third card slot module 130 has a third switch, and the state of the third switch indicates whether a communication card is connected to the third card slot module 130.
[0063] Figure 6 This embodiment provides a schematic diagram of the specific structure of the communication module including the second switch, as shown below. Figure 6 As shown, the second card slot module 120 includes a second card slot 202 and a second switch K2 disposed in the second card slot 202. Unlike the first switch K1, the second switch K2 is only used to indicate whether a communication card is connected to the second card slot 202, while the first switch K1 is used not only to indicate whether a communication card is connected to the first card slot 201, but also to control the communication circuit, so that when no communication card is connected to the first card slot 201, the second card slot 202 and the baseband chip 100 form a communication circuit.
[0064] The communication module 10 provided in this embodiment enables the selection of the first card slot module 110 and the second card slot module 120 based on whether a communication card is connected to the first card slot module 110. The switching between the first card slot module 110 and the second card slot module 120 does not require a signal selection circuit. The access of the dual card slot module is achieved without the need for a signal selection circuit and other additional device settings, which is lower in cost and more practical.
[0065] This application also provides a terminal device, including the communication module provided in the above embodiments, wherein the first card slot module and the second card slot module correspond to different communication operators.
[0066] Specifically, refer to Figure 1 To illustrate, in one example, when a communication card is connected to the first card slot module 110, the first switch K1 is in the first state; when no communication card is connected to the first card slot module 110, the first switch K1 is in the second state.
[0067] It should be noted that since the first switch K1 does not affect the connection between the first card slot module 110 and the baseband chip 100, the first card slot module 110 and the baseband chip 100 form a communication loop regardless of whether the first switch K1 is in the first state or the second state.
[0068] Specifically, when the first switch K1 is in the first state, the first card slot module 110 connects to a communication card, and the communication card connected to the first card slot module 110 communicates with the baseband chip 100, thereby enabling the communication card to connect to the network. When the first switch K1 is in the second state, the first card slot module 110 does not connect to a communication card. Although the first card slot module 110 forms a communication loop with the baseband chip 100, it does not connect to the network and cannot connect to the network. When the first switch K2 is in the second state, the second card slot module 120 forms a communication loop with the baseband chip 100. If the second card slot module 120 connects to a communication card at this time, the communication card connected to the second card slot module 120 communicates with the baseband chip 100, thereby enabling the communication card to connect to the network. If the second card slot module 120 does not connect to a communication card at this time, although it forms a communication loop with the baseband chip 100, it does not connect to the network and cannot connect to the network.
[0069] In other words, the first card slot module 110 always forms a communication loop with the baseband chip 100. When a communication card is connected to the first card slot module 110, the communication card connected to the first card slot module 110 communicates with the baseband chip 100, and the connection of the communication card causes the first switch K1 to be in the first state, disconnecting the communication loop between the second card slot module 120 and the baseband chip 100. At this time, regardless of whether a communication card is connected to the second card slot module 120, the baseband chip 100 only communicates with the communication card connected to the first card slot module 110. When a communication card is not connected to the first card slot module 110 but a communication card is connected to the second card slot module 120, the first switch K1 is in the second state, the second card slot module 120 and the baseband chip 120 form a communication loop, and the communication card connected to the second card slot module 120 communicates with the baseband chip.
[0070] Based on the above discussion, the communication module 10 has three working states depending on whether the communication card is connected to the first card slot module 110 and the second card slot module 120: (1) When the communication card is not connected to the first card slot module 110 and the second card slot module 120; at this time, the first switch K1 is in the second state, and both the first card slot module 110 and the second card slot module 120 are connected to the baseband chip 100, but since there is no communication card connected, neither the first card slot module 110 nor the second card slot module 120 can connect to the network. (2) When the communication card is connected to the first card slot module 110; based on (1), since the communication card is connected to the first card slot module 110, the communication card connected to the first card slot module 110 can connect to the network; in addition, since the first card slot module 110 is connected to the communication card, the first switch K1 changes to the first state, and the first switch K1 disconnects the communication loop between the baseband chip 100 and the second card slot module 120. At this time, regardless of whether the communication card is connected to the second card slot module 120, the communication card corresponding to the second card slot module cannot connect to the network. (3) When the communication card is connected to the second card slot module 120; based on (1), since the communication card is connected to the second card slot module 120, the communication card connected to the second card slot module 120 is connected to the network.
[0071] In one example, refer to Figure 2 When a communication card is connected to the first card slot module of the terminal device, the first switch K1 is in the open state. At this time, only the grounding terminal GND of the first card slot 201 is connected to the grounding terminal GND of the baseband chip 100, and the communication card connected to the first card slot 201 is connected to the baseband chip 100.
[0072] In one example, refer to Figure 3 When a communication card is connected to the second card slot module of the terminal device, no communication card is connected to the first card slot 201, and the first switch K1 is in the closed state. At this time, the grounding terminal GND of the first card slot 201 and the second card slot 202 is connected to the grounding terminal GND of the baseband chip 100. Since no communication card is connected to the first card slot 201 at this time, the communication card connected to the second card slot 202 is connected to the baseband chip 100.
[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0074] Furthermore, the terms "first," "second," etc., used in the embodiments of this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this utility model can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this utility model, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.
[0075] In this utility model, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific implementation.
[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A communication module, characterized in that, include: Baseband chip; A first card slot module and a second card slot module, respectively coupled to the baseband chip; The first card slot module has a first switch, which is connected to the second card slot module and the baseband chip. The first card slot module is configured to change the switch state of the first switch in response to whether a communication card is connected to the first card slot module. The switch state of the first switch includes a first state and a second state. When the first switch is in the first state or the second state, the first card slot module and the baseband chip form a communication loop; When the first switch is in the second state, the second card slot module and the baseband chip form a communication loop.
2. The communication module according to claim 1, characterized in that, The first state is the open state, and the second state is the closed state; The first switch is configured to be in the first state in response to the first card slot module receiving a communication card; Alternatively, in response to the first card slot module not being connected to a communication card, the first switch is set to the second state.
3. The communication module according to claim 1, characterized in that, The first card slot module includes a first card slot and the first switch placed in the first card slot.
4. The communication module according to claim 3, characterized in that, The second card slot module includes a second card slot, the identification terminal of the first card slot is connected to the ground terminal of the second card slot and the first terminal of the first switch, and the second terminal of the first switch is connected to the ground terminal of the first card slot and the ground terminal of the baseband chip.
5. The communication module according to claim 4, characterized in that, The identification terminal of the baseband chip is connected to the identification terminal of the first card slot and the identification power supply.
6. The communication module according to claim 5, characterized in that, Also includes: A protection resistor, the first end of which is connected to the identification terminal of the baseband chip, and the second end of which is connected to the identification power supply.
7. The communication module according to claim 1, characterized in that, The second card slot module has a second switch, and the second card slot module is configured to change the switch state in response to whether a communication card is connected to the second card slot module. The switch state of the second switch includes a third state and a fourth state. When the first switch is in the first state, the first card slot module and the baseband chip form a communication loop; When the first switch is in the second state and the second switch is in the third state, the second card slot module and the baseband chip form a communication loop.
8. The communication module according to claim 7, characterized in that, The third state is the open state, and the fourth state is the closed state; The second switch is configured such that, in response to a communication card being connected to the second card slot module, the second switch is placed in the third state; Alternatively, in response to the second card slot module not being connected to a communication card, the second switch is placed in the fourth state.
9. The communication module according to claim 7, characterized in that, The second card slot module includes a second card slot and a second switch disposed in the second card slot.
10. A terminal device, characterized in that, Includes the communication module as described in any one of claims 1 to 9.