ESIM forward and reverse plugging self-adaptive circuit and eSIM forward and reverse plugging self-adaptive device
By using the eSIM reversible insertion adaptive circuit, the main control module, SIM channel switching chip, and level conversion chip are used to automatically identify and correct the eSIM insertion direction, thus solving the problem of eSIM insertion backwards and improving the recognition success rate and reliability.
Patent Information
- Application Number
- CN202520317087.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-26
AI Technical Summary
eSIM cards are easily inserted backwards during the insertion process, leading to recognition failure. Existing technology has difficulty effectively distinguishing between the correct and incorrect insertion.
The system employs an eSIM reversible insertion adaptive circuit, including a main control module, a SIM channel switching chip, a reset chip, and a level conversion chip. It automatically corrects the insertion direction by recognizing voltage differences, ensuring correct level conversion and signal connection.
It enables automatic identification and correction of reverse insertion during eSIM insertion, improving the reliability and success rate of eSIM insertion and reducing the occurrence of human error.
Smart Images
Figure CN223926901U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of eSIM card technology, specifically to an eSIM reversible insertion adaptive circuit and device. Background Technology
[0002] eSIM, short for Embedded SIM, has become widely used with the continuous evolution of mobile devices such as smartphones, smartwatches, and IoT devices. Among these, the 1.8V, 5*6 packaged eSIM is the most common. Currently, besides automated placement using a chip mounter, eSIMs are also used in manual insertion and removal, in conjunction with eSIM card slots. However, due to the small size of the eSIM and the lack of clear orientation markings, the risk of incorrect insertion is unavoidable. Utility Model Content
[0003] To help solve the above-mentioned technical problems, this application provides an eSIM reversible insertion adaptive circuit and device.
[0004] Firstly, this application provides an eSIM reversible insertion adaptive circuit, which adopts the following technical solution:
[0005] An eSIM reversible insertion adaptive circuit includes a main control module, an eSIM card slot, a SIM channel switching chip, a reset chip, and a level conversion chip.
[0006] The SIM signal interface of the main control module is connected to the first SIM channel of the SIM channel switching chip, the SIM signal interface of the main control module is connected to the level conversion chip, the level conversion chip is connected to the second SIM channel of the SIM channel switching chip, the SIM main channel of the SIM channel switching chip is connected to the eSIM card slot, and the reset chip is connected to the control pins of the SIM channel switching chip and the level conversion chip.
[0007] The main control module is used to read and identify the eSIM card, the eSIM card slot is used for inserting and fixing the eSIM card, the SIM channel switching chip is used to switch the SIM channel, and the reset chip is used for voltage identification and providing control signals. The reset chip is used to output a reset signal according to the SIM level change of the main control module, and the reset signal is used to control the SIM channel switching chip and the level conversion chip respectively.
[0008] The level conversion chip is used to perform SIM level conversion and simultaneously connect the master control module side reset signal to the pin corresponding to the eSIM card side data signal, and connect the master control module side data signal to the pin corresponding to the eSIM card side reset signal.
[0009] Preferably, the level conversion chip is used to convert between 1.8V and 3.0V SIM levels.
[0010] Preferably, the main control module is a main control platform or a communication module, the SIM channel switching chip is a SIM channel switching chip BCT4699, the reset chip is a 2.6V reset chip SGM809-RXN3, and the level conversion chip is a level conversion chip SGM4574.
[0011] Secondly, this application provides an eSIM reversible insertion adaptive device, which adopts the following technical solution:
[0012] An eSIM reversible insertion adaptive device, wherein the eSIM reversible insertion adaptive device includes an eSIM reversible insertion adaptive circuit and an eSIM card as described in the first aspect.
[0013] The first NC pin PIN2 of the eSIM card slot is connected to the clock signal pin of the eSIM card, the second NC pin PIN4 of the eSIM card slot is connected to the power pin of the eSIM card, and the third NC pin PIN5 of the eSIM card slot is grounded.
[0014] In summary, this application uses common components such as level conversion chips, SIM channel switching chips, and reset chips to form a stable, low-cost, and highly practical eSIM reversible insertion adaptive circuit. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of one embodiment of an eSIM reversible insertion adaptive circuit according to this application;
[0016] Figure 2 for Figure 1 A schematic diagram of the SIM channel switching chip U2 in the illustrated embodiment;
[0017] Figure 3 for Figure 1 A schematic diagram of the reset chip U3 in the illustrated embodiment;
[0018] Figure 4 for Figure 1 A schematic diagram of the main control module HOST1 in the illustrated embodiment;
[0019] Figure 5 for Figure 1 A schematic diagram of the level conversion chip U4 in the illustrated embodiment;
[0020] Figure 6 for Figure 1 A schematic diagram of the eSIM card slot CON1 in the embodiment shown;
[0021] Figure 7This is a schematic diagram of the pin definitions for the eSIM in this application. Detailed Implementation
[0022] The present application will be further described below with reference to the accompanying drawings. The structure and principle of the present application are very clear to those skilled in the art. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
[0023] Figure 1 This is a schematic diagram of one embodiment of an eSIM reversible insertion adaptive circuit according to this application. Figure 2 for Figure 1 A schematic diagram of the SIM channel switching chip U2 in the embodiment shown. Figure 3 for Figure 1 A schematic diagram of the reset chip U3 in the illustrated embodiment. Figure 4 for Figure 1 The diagram shown is a schematic of the main control module HOST1 in the embodiment shown. Figure 5 for Figure 1 A schematic diagram of the level conversion chip U4 in the embodiment shown. Figure 6 for Figure 1 The diagram shown is a schematic of the eSIM card slot CON1 in the embodiment shown. Figure 7 This is a schematic diagram of the pin definitions for the eSIM in this application.
[0024] Combination Figures 1 to 7 It is understood that the eSIM reversible insertion adaptive circuit of this application includes a main control module HOST1, an eSIM card slot CON1, a SIM channel switching chip U2, a reset chip U3, and a level conversion chip U4. The SIM signal interface of the main control module HOST1 is connected to SIM channel 1 (first SIM channel) of the SIM channel switching chip U2, and the SIM signal interface of the main control module HOST1 is connected to the level conversion chip U4. The level conversion chip U4 is connected to SIM channel 2 (second SIM channel) of the SIM channel switching chip U2, and the SIM main channel of the SIM channel switching chip U2 is... Connected to the eSIM card slot CON1, the reset chip U3 is connected to the control pins of the SIM channel switching chip U2 and the level conversion chip U4; the main control module HOST1 is used to read and identify the eSIM card, the eSIM card slot CON1 is used for inserting and fixing the eSIM card, the SIM channel switching chip U2 is used to switch the SIM channel, and the reset chip U3 is used for voltage identification and providing control signals; the reset chip U3 is used to output a reset signal according to the SIM level change of the main control module HOST1, and the reset signal is used to control the SIM channel switching chip U2 and the level conversion chip U4 respectively.
[0025] The level conversion chip U4 is used to perform SIM level conversion and simultaneously connect the main control module HOST1 side reset signal RST_HOST to the pin corresponding to the eSIM card side data signal DAT_1V8, and connect the main control module HOST1 side data signal DAT_HOST to the pin corresponding to the eSIM card side reset signal RST_1V8.
[0026] In this embodiment, the level conversion chip U4 is used to convert between 1.8V and 3.0V SIM levels. The main control module HOST1 is the main control platform or communication module, the SIM channel switching chip U2 is the SIM channel switching chip BCT4699, the reset chip U3 is the 2.6V reset chip SGM809-RXN3, and the level conversion chip U4 is the level conversion chip SGM4574.
[0027] Specifically, the main control module HOST1 is an IoT platform or communication module with card reading and identification capabilities. During the power-on process, it first starts with a 1.8V level to perform the card identification process. If the card identification fails, it will automatically start with a 3V level to perform the card identification process again. The mainstream eSIM is a 1.8V 5*6 package, and its three NC pins can be utilized.
[0028] Since the current mainstream eSIM uses 1.8V, successful recognition indicates the eSIM is inserted correctly; failure to recognize indicates the eSIM is inserted incorrectly, and HOST1 automatically enters the 3V card detection process. During the 3V card detection process, the entire SIM signal set at the HOST end, including VDD_HOST, is 3V. U3 is a 2.6V reset chip SGM809-RXN3, with a default output of low level. Its reset trigger level is 2.6V. After triggering, U3 outputs a high level. After the SW signal receives a high level, it will activate the U4 level conversion chip SGM4574. U4 converts the 3V SIM signal from HOST1 to 1.8V to adapt to the 1.8V eSIM. While U4 is converting the level, it also performs RST and DAT crossover to correct the incorrectly inserted eSIM. During this period, the U2 SIM channel switching chip SGM4699 also receives the SW signal, connecting the eSIM to the 1.8V SIM signal to ensure the correct eSIM level.
[0029] This application also provides an eSIM reversible insertion adaptive device, which includes the aforementioned eSIM reversible insertion adaptive circuit and an eSIM card. The first NC pin PIN2 of the eSIM card slot CON1 is connected to the clock signal pin CLK_ESIM of the eSIM card, the second NC pin PIN4 of the eSIM card slot CON1 is connected to the power supply pin VDD_ESIM of the eSIM card, and the third NC pin PIN5 of the eSIM card slot CON1 is grounded.
Claims
1. An eSIM positive and negative plug adapt circuit, characterized in that, The eSIM positive and negative insertion adaptive device comprises an eSIM positive and negative insertion adaptive circuit and an eSIM card. The SIM signal interface of the master control module is connected with the first SIM channel of the SIM channel switching chip, the SIM signal interface of the master control module is connected with the level conversion chip, the level conversion chip is connected with the second SIM channel of the SIM channel switching chip, the SIM main channel of the SIM channel switching chip is connected with the eSIM card slot, and the control pin of the SIM channel switching chip and the control pin of the level conversion chip are connected with the reset chip. The master control module is used for reading and identifying the eSIM card, the eSIM card slot is used for inserting and fixing the eSIM card, the SIM channel switching chip is used for switching the SIM channel, and the reset chip is used for voltage identification and providing a control signal. The level conversion chip is used for converting the SIM level and connecting the reset signal on the master control module side to the pin corresponding to the data signal on the eSIM card side and connecting the data signal on the master control module side to the pin corresponding to the reset signal on the eSIM card side.
2. The eSIM positive and negative plug adaptation circuit of claim 1, wherein, The level conversion chip is used for converting between 1.8V and 3.0V SIM levels.
3. The eSIM positive and negative plug adaptation circuit of claim 2, wherein, The master control module is a master control platform or a communication module, the SIM channel switching chip is a SIM channel switching chip BCT4699, the reset chip is a 2.6V reset chip SGM809-RXN3, and the level conversion chip is a level conversion chip SGM4574.
4. An eSIM plug-positive or plug-negative adaptation device, characterized by The eSIM positive and negative insertion adaptive device comprises an eSIM positive and negative insertion adaptive circuit and an eSIM card, The first NC pin PIN2 of the eSIM card slot is connected with the clock signal pin of the eSIM card, the second NC pin PIN4 of the eSIM card slot is connected with the power pin of the eSIM card, and the third NC pin PIN5 of the eSIM card slot is grounded.