CN211375637U

CN211375637U - SIM card with large-capacity storage function

Info

Publication number: CN211375637U
Application number: CN201922402336.1U
Authority: CN
Inventors: 李虎; 陶立平; 刘政宏; 李国强
Original assignee: Shenzhen Demingli Electronics Co Ltd
Current assignee: Shenzhen Demingli Electronics Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-08-28
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses a possess mass storage function's SIM card, the SIM card includes: the two-in-one control chip is used for processing telecommunication service commands, carrying out SIM interface communication with an external terminal, controlling and managing the flash memory chip, transmitting data to be stored, which is obtained by an SD interface of the external terminal, to the flash memory chip, and carrying out SD interface communication with the external terminal; the SIM contact is used for connecting an SIM interface of an external terminal and processing telecommunication service interactive communication; the SD contact is used for connecting an SD interface of an external terminal to enable the external terminal and the two-in-one control chip to generate interactive communication of stored data; the flash memory chip is used for storing the data to be stored transmitted by the two-in-one control chip; the base plate is used for bearing the two-in-one control chip, the SIM contact, the SD contact and the flash memory chip and enabling the two-in-one control chip, the SIM contact, the SD contact and the flash memory chip to be electrically connected. Compared with the prior art, the scheme can improve the production efficiency of the large-capacity SIM card.

Description

SIM card with large-capacity storage function

Technical Field

The utility model relates to the smart machine field especially involves a SIM card that possesses large capacity storage function.

Background

Intelligent devices such as mobile phones are used as production and living tools of people and are deeply inserted into the lives of people. The mobile phones on the market are divided into two types, one type is to support the expansion of the Micro SD card, and the other type is not to support the expansion of the Micro SD card. In a mobile phone supporting expansion of a Micro SD card, a Micro SD card/SIM card two-in-one card slot is generally adopted, one card slot is used for placing the SIM card, and the other card slot is used for placing the Micro SD card, so that the requirements of mobile phone communication and memory expansion are met. Due to the design, a mobile phone user can use the standby function of the double SIM cards and cannot expand the memory, or a single SIM card is in standby and the other card slot is used for expanding the memory. Therefore, the communication function of the SIM card and the memory expansion of the Micro SD card can be realized in a single card slot at the same time, and the user experience can be obviously improved.

In the prior art, a patent with patent number CN200620064756.3 and patent name "high-capacity SIM card" discloses a high-capacity SIM card, which is designed by introducing a highly integrated MMC memory card structure on the structure of the existing SIM card, wherein the memory card structure includes an MMC controller, a NANDFLASH controller and a NAND FLASH memory cell. As shown in fig. 2 of the patent document, on the basis of the SIM card 1, the MMC memory card structure is connected to form the SIM card 2 (i.e. the SIM card system), the MMC memory structure in the comparison document integrates the memory chip with the control module, NAND FLASH the memory cell needs a special production process (e.g. eflash), if it is integrated with other modules in a chip, the production yield of the chip will be reduced, and the memory cell with a capacity of more than 1GB can not be integrated into the chip at present.

Therefore, how to improve the structure of the existing high-capacity SIM card is very important for mass production of the high-capacity SIM card.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a SIM card that possesses large capacity storage function aims at solving the structure that improves current large capacity SIM card, the technical problem of the volume production of the large capacity SIM card of being convenient for.

The utility model provides a SIM card that possesses mass storage function, include:

the two-in-one control chip is used for processing telecommunication service commands, carrying out SIM interface communication with an external terminal, controlling and managing the flash memory chip, transmitting data to be stored, which is obtained by an SD interface of the external terminal, to the flash memory chip, and carrying out SD interface communication with the external terminal;

the SIM contact is used for connecting an SIM interface of an external terminal and processing telecommunication service interactive communication;

the SD contact is used for connecting an SD interface of an external terminal to enable the external terminal and the two-in-one control chip to generate interactive communication of stored data;

the flash memory chip is used for storing the data to be stored transmitted by the two-in-one control chip;

the base plate is used for bearing the two-in-one control chip, the SIM contact, the SD contact and the flash memory chip and enabling the two-in-one control chip, the SIM contact, the SD contact and the flash memory chip to be electrically connected.

Preferably, the two-in-one control chip comprises:

the CPU is used for running the firmware program and coordinating the running of other functional modules according to the requirement of the firmware program;

a ROM for storing a firmware program;

the data memory is used for storing SIM card secret keys, PUK codes, user telephone numbers, short messages, key parameters and program codes used by the SD card and secret keys used by the SD card, wherein the data memory comprises an EEPROM or an MTP;

the SIM interface controller is used for being responsible for SIM interface communication and processing telecommunication service commands;

the SD protocol controller is used for being responsible for analyzing the SD interface communication protocol, processing commands, receiving data sent by the host or returning data required by the host;

the flash memory controller is used for being responsible for communication of the flash memory chip interface, realizing reading, programming and erasing commands of the flash memory chip, and receiving or sending data of the flash memory chip interface;

the DMA data channel controller is used for coordinating data transmission of the SD interface and the flash memory chip interface and optimizing internal data flow;

the special algorithm module is used for realizing an encryption algorithm used by the SIM card, an ECC data error correction algorithm used by the SD card, a flash memory chip management acceleration algorithm and an encryption algorithm used by the encrypted SD card;

the SIM interface is used for connecting the SIM contact and carrying out SIM interface communication with an external terminal;

the SD interface is used for connecting the SD contact and carrying out SD interface communication with an external terminal;

the overtime timer is used for ensuring that the CPU can timely correspond to the command of the SD interface communication;

and the RAM is used for storing variables used by programs, buffering user data and storing data.

Preferably, the flash memory controller, the DMA data controller, the SD protocol controller, the RAM, the special algorithm module, the ROM, the SIM interface controller and the overtime timer are all electrically connected with the CPU;

the SD protocol controller is electrically connected with the SD interface;

the SIM interface controller is electrically connected with the SIM interface;

the SIM interface controller is electrically connected with the data memory;

the SD interface is electrically connected with the SD contact, and the SIM interface is electrically connected with the SIM contact.

Preferably, the dedicated algorithm module comprises A3, A8 encryption algorithm and a national secret algorithm, wherein the encryption algorithm is used for the SIM card, and the national secret algorithm is used for encrypting data used by the SIM card and the SD card.

Preferably, the SD interface version includes SD1.0, SD2.0, SD3.0, SD4.0, SD5.0, SD6.0 and SD 7.0;

the SIM interface conforms to the ISO/IEC7816 protocol.

Preferably, the two-in-one control chip is provided with an SIM interface aluminum pad and an SD interface aluminum pad;

the SIM interface aluminum pad is electrically connected with the SIM contact;

the SD interface aluminum pad is electrically connected with the SD contact.

Preferably, the two-in-one control chip further comprises: the device comprises a power supply management module, a clock generation module and a voltage detection module.

Preferably, the CPU, the RAM, the ROM, the data memory module, the power management module and the clock generation module are SIM card and SD card function multiplexing modules.

The beneficial effects of the utility model reside in that: the functional module of the SIM card and SD card two-in-one control chip is a multiplexing module which can meet the requirements of both the SIM card and the SD card, so that the chip area is saved, and the cost is reduced. The space occupied by the two-in-one control chip in the limited physical space of the SIM card is smaller, the encapsulation and routing are easier to realize, and the mass production of the large-capacity SIM card is convenient!

Drawings

Fig. 1 is a schematic diagram of a first structure of a SIM card with mass storage function according to the present invention;

FIG. 2 is a first structural diagram of a two-in-one control chip of the SIM card with mass storage function in FIG. 1;

FIG. 3 is a second structural diagram of a two-in-one control chip of the SIM card with mass storage function in FIG. 1;

fig. 4 is a flowchart of a first embodiment of a method for controlling a SIM card with mass storage capability;

fig. 5 is a flowchart of a second embodiment of a method for controlling a SIM card with mass storage capability.

Description of reference numerals:

1. a two-in-one control chip; 2. a flash memory chip; 3. an SD contact; 4. a SIM contact; 5. a substrate;

101. a CPU; 102. a ROM; 103. a data storage; 104. a SIM interface controller; 105. an SD protocol controller; 106. a flash memory controller; 107. a DMA data path controller; 108. a dedicated algorithm module; 109. a SIM interface; 110. an SD interface; 111. an overtime timer; 112. a RAM;

113. an SIM interface aluminum pad; 114. SD interface aluminum pad.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, the utility model provides a SIM card that possesses mass storage function, include:

the two-in-one control chip 1 is used for processing telecommunication service commands, carrying out SIM interface communication with an external terminal, controlling and managing the flash memory chip 2, transmitting data to be stored, which is obtained by an SD interface of the external terminal, to the flash memory chip 2, and carrying out SD interface communication with the external terminal;

the SIM contact 4 is used for connecting an SIM interface of an external terminal and processing telecommunication service interactive communication;

the SD contact 3 is used for connecting an SD interface of an external terminal to enable the external terminal and the two-in-one control chip 1 to generate interactive communication of stored data;

the flash memory chip 2 is used for storing the data to be stored transmitted by the two-in-one control chip 1;

and the substrate 5 is used for bearing the two-in-one control chip 1, the SIM contact 4, the SD contact 3 and the flash memory chip 2 and electrically connecting the two-in-one control chip, the SIM contact 4, the SD contact 3 and the flash memory chip.

In the embodiment of the present invention, P1 to P8 are SD contacts 3, and S1 to S6 are SIM contacts 4. The SIM contact 4 and the SD contact 3 are packaged on the surface of the substrate 5, the SD contact 3, the SIM contact 4 and the flash memory chip 2 are electrically connected with the two-in-one control chip 1, wherein the SD interface version comprises SD1.0, SD2.0, SD3.0, SD4.0, SD5.0, SD6.0 and SD7.0, and the SIM interface conforms to an ISO/IEC7816 protocol. The two-in-one control chip 1 is not only used for processing telecommunication service commands and communicating with an SIM interface of an external terminal, but also can control and manage the flash memory chip 2, transmit data to be stored obtained by an SD interface of the external terminal to the flash memory chip 2 and communicate with the SD interface of the external terminal. The flash memory chip 2 is a main medium for storing data, and the stored data is managed by the two-in-one control chip 1, including writing data into the flash memory chip 2, reading data from the flash memory chip 2, formatting data of the flash memory chip 2, and the like. The storage capacity of the flash memory chip 2 can be customized according to the requirement of customers, and the storage capacity is from 128M to 128G. The types of the flash memory chip 2 include SLC (Single-Level Cell), MLC (Multi-Level Cell), and TLC (triple-Level Cell). The two-in-one control chip 1, the SIM contact 4, the SD contact 3 and the flash memory chip 2 are all packaged on the substrate 5, and the substrate 5 is electrically connected after routing. When an external terminal communicates with a SIM card with a large-capacity storage function (hereinafter referred to as a large-capacity SIM card), external data enters the two-in-one control chip 1 from the SIM contact 4, the SIM interface controller 104 analyzes the command, responds to the telecommunication service command, starts the special algorithm module 108 to process the data in the data storage 103 under the cooperation of the CPU101, and feeds back the processed result to the external terminal, thereby implementing the communication function of the external terminal. When an external terminal performs data interaction with a high-capacity SIM card, data to be stored enters the two-in-one control chip 1 from the SD contact 3, the SD protocol controller 105 analyzes a command, the command which does not need data transmission is directly responded, for the command which needs data transmission, the overtime timer 111 is started under the cooperation of the CPU101 for timing, the DMA data path controller 107 is started to buffer the obtained data to be stored to the RAM112, the flash memory controller 106 and the special algorithm module 108 are started to send an operation command to the flash memory chip 2, and the data is transmitted to the flash memory chip 2, so that the data of the external terminal is stored to the high-capacity SIM card. If the encrypted data is stored in the flash memory chip 2, the dedicated algorithm module 108 is further required to encrypt and decrypt the data. The process of the external terminal for calling data from the high-capacity SIM card is opposite to the process, so the description is omitted. Through the arrangement, the control modules of the SIM card and the SD card are combined into a whole, the buses of the control modules of the SIM card and the SD card are shortened, the response speed of data interaction between the SIM card and the SD card is increased, and therefore the performance of the large-capacity SIM card is improved. The functional module of the two-in-one control chip 1 is a multiplexing module which can meet the requirements of both the SIM card and the SD card, so that the chip area is saved, and the cost is reduced. The space occupied by the two-in-one control chip in the limited physical space of the SIM card is smaller, the encapsulation and routing are easier to realize, and the mass production of the large-capacity SIM card is convenient! In addition, through the arrangement, one intelligent card has the communication function of the SIM card and the memory expansion function of the Micro SD card, so that after a high-capacity SIM card is inserted into a single card slot of an external terminal, the communication function of the SIM card and the memory expansion function of the Micro SD card can be realized simultaneously, and the external storage capacity of the mobile phone is expanded while the SIM card is normally used. By analogy, for the mobile phone card slot with double-card double-standby function, the scheme also expands the external storage capacity of the mobile phone and improves the user use experience on the premise of meeting the requirement of the user on double-card double-standby function.

Referring to fig. 2, the two-in-one control chip 1 includes:

the CPU101 is used for running a firmware program and coordinating the running of other functional modules according to the requirement of the firmware program;

a ROM102 for storing a firmware program;

a data memory 103 for storing a key of the SIM card, a PUK code, a phone number of a user, a short message, key parameters used by the SD card, a program code, and a key used by the SD card, wherein the data memory 103 includes an EEPROM or an MTP;

a SIM interface controller 104, which is responsible for the SIM interface 109 to communicate and process the telecommunication service command;

the SD protocol controller 105 is responsible for analyzing and processing commands of the communication protocol of the SD interface 110, receiving data sent by the host or returning data required by the host;

the flash memory controller 106 is responsible for communication of the flash memory chip interface, realizes reading, programming and erasing commands of the flash memory chip 2, and receives or sends data of the flash memory chip interface;

a DMA data path controller 107, configured to coordinate data transmission between the SD interface 110 and the flash memory chip interface, and optimize an internal data stream;

the special algorithm module 108 is used for realizing an encryption algorithm used by the SIM card, an ECC data error correction algorithm used by the SD card, a flash memory chip management acceleration algorithm and an encryption algorithm used by the encrypted SD card;

the SIM interface 109 is used for connecting the SIM contact and communicating with the SIM interface 109 with an external terminal;

the SD interface 110 is used for connecting the SD contact and communicating with the SD interface 110 with an external terminal;

a timeout timer 111 for ensuring that the CPU101 can timely respond to the command communicated by the SD interface 110;

and a RAM112 for storing variables used by the programs, buffering user data, and storing data.

In the embodiment of the present invention, the flash memory controller 106, the DMA data controller 107, the SD protocol controller 105, the RAM112, the dedicated algorithm module 108, the ROM102, the SIM interface controller 104, and the timeout timer 111 are all electrically connected to the CPU 101. The SD protocol controller 105 is electrically connected to the SD interface 110; the SIM interface controller 104 is electrically connected to the SIM interface 109. The SIM interface controller 104 is electrically connected to the data storage 103. SD interface 110 is electrically connected to SD contact 3, and SIM interface 109 is electrically connected to SIM contact 4.

In the embodiment of the present invention, the data storage 103 includes EEPROM or MTP, and is used for storing the key of the SIM card, the PUK code, etc. to store the telephone number of the user, the short message, etc. for ensuring the security, the data used by the SIM card is generally stored in the EEPROM or MTP inside the chip, and is not stored in the external flash memory. The EEPROM or the MTP can also be used for storing key parameters, program codes and the like used by the SD card, improving the stability and the service life of the SD memory card, and can also be used for storing encryption related data such as a secret key and the like used by the SD card so as to manufacture the encrypted SD card. The EEPROM or MTP is originally used by the SIM card, but can also be used for the SD card expansion function of the large-capacity SIM card.

In the embodiment of the present invention, the DMA data path controller 107 is the burden of the CPU101 when lightening the large capacity data transmission, the data path of the large capacity data transmission is realized by the DMA data path controller 107, and the data transmission process does not need the participation of the CPU 101. In order to improve the read-write performance of the high-capacity SIM card, the DMA data path controller 107 coordinates the data transmission of the SD interface 110 and the flash memory chip 2 interface, and optimizes the internal data stream. In an embodiment of the present invention, the dedicated algorithm module 108 includes A3 and A8 encryption algorithms for SIM cards. The dedicated algorithm module 108 includes A3, A8 encryption algorithm for the SIM card, and a cryptographic algorithm for encrypting data used by the SIM card and the SD card, including SM1, SM2, SM3, and SM 4.

Referring to fig. 3, the two-in-one control chip 1 is provided with a SIM interface aluminum pad 113 and an SD interface aluminum pad 114;

each SIM interface aluminum pad 113 is electrically connected with an external SIM contact 4 respectively;

the SD interface aluminum pad 114 includes a first pad electrically connected to the external SD contact 3 and a second pad electrically connected to the flash memory chip 2.

In the embodiment of the present invention, the SIM interface aluminum pads 113 are distributed in an array. The SD interface aluminum pad 114 includes a first pad electrically connected to the SD contact 3 for receiving or transmitting data to an external terminal, and a second pad electrically connected to the flash memory chip 2 for transmitting data to be stored to the flash memory chip 2 or retrieving stored data from the flash memory chip 2. In the embodiment of the present invention, the SIM interface aluminum pad 113 and the SD interface aluminum pad 114 are wired to the substrate 5 first, and then are connected to the SIM contact 4 and the SD contact 3 respectively.

The embodiment of the present invention provides an embodiment, the two-in-one control chip 1 further includes a power management module, a clock generation module and a voltage detection module. The power management module is responsible for generating different voltages for the kernel and the I/O of the two-in-one control chip 1, and low-power management is achieved. The clock generation module is responsible for providing the operation clock for the two-in-one control chip 1. The voltage detection module is responsible for detecting the power-on and power-off processes of the two-in-one control chip 1.

In the embodiment of the present invention, the module that can be shared by the SIM card chip and the Micro SD card control chip includes a CPU101, a RAM112, a ROM102, a data storage 103, a power management module, a clock generation module, and the like. Through the setting, make two unification control chip 1 with all circuit integrations of SIM card chip to Micro SD card control chip the inside, not only two unification control chip 1 is because some functional module have been shared, save the chip area, thereby the cost is reduced compares with the detached scheme of SIM card chip and Micro SD card control chip, and the space that two unification control chip 1 occupy in originally very narrow and small encapsulation space is littleer, changes in the encapsulation and the routing that realize large capacity SIM card.

Referring to fig. 4, the present invention provides a method for controlling a SIM card having a mass storage function, including:

s1: judging whether the CPU101 is processing the SD interface command;

s2: if yes, judging whether the CPU101 receives an SIM interface command;

s3: if yes, the CPU101 interrupts the processing of the SD interface command requiring data transfer, and preferentially processes the SIM interface command.

In the embodiment of the present invention, the two-in-one control chip 1 determines whether the CPU101 is processing the SD interface command. If yes, whether the CPU101 receives the SIM interface command is judged. If yes, the CPU101 interrupts the processing of the SD interface command requiring data transfer, and preferentially processes the SIM interface command. Because the SIM card control module and the Micro SD card control module share the CPU101 and share a set of firmware program, the SD interface data communication allows a certain timeout time, so the program ensures that the program responds to the command communication of the SIM interface command preferentially. For the SIM interface command needing the participation of the CPU101, the processing priority is higher than that of the SD interface command, if the CPU101 is processing the SD interface command and the SIM interface command needs to be processed by the CPU101 at the same time, the CPU101 firstly suspends the processing of the SD interface command and continues to process the SD interface command after the SIM interface command is interrupted. Through the setting, the high-capacity SIM card is ensured to respond to the SIM interface command preferentially, and the influence on the normal use of the SIM card when the high-capacity SIM card stores data is avoided. In other embodiments of the present invention, SD interface commands that do not need to be processed by CPU101 are processed by SD protocol controller 105. The SD interface commands that do not require data transfer, such as CMD7, CMD8, CMD13, CMD16, ACMD6, ACMD22, are processed by the SD protocol controller 105 without the involvement of the CPU 101. SD interface commands such as CMD17, CMD18, CMD24, CMD25, etc. that require data transfer require the CPU101 to participate in processing. Through the arrangement, the load of the CPU101 is reduced, and the response speed of data interaction between the two-in-one control chip 1 and an external terminal is improved.

Referring to fig. 5, if yes, the CPU101 interrupts the processing of the SD interface command requiring data transfer, and after step S3 of preferentially processing the SIM interface command, the method includes:

s4: for the interrupted SD interface command, calling the RAM112 for SD interface data buffering;

s5: after the data buffering of the SD interface is finished, starting an overtime timer 111, and starting timing by the overtime timer 111 by taking the starting time of the overtime timer 111 as a first time;

s6: the timeout timer judges whether the time difference between the current moment and the first moment is greater than a preset time threshold value in real time;

s7: if yes, the CPU101 suspends processing the SIM interface command, starts processing the SD interface command, and continues processing the SIM interface command after the CPU101 finishes processing the SD interface command.

In the embodiment of the present invention, the two-in-one control chip 1 adds an overtime timer 111 to ensure that the interrupted SD interface command is responded before the time-out. Through the arrangement, the SIM card chip and the Micro SD card chip can be integrated together, the original functions of the SIM card and the Micro SD card are not influenced, and the compatibility of the SIM card and the Micro SD card is realized.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. A SIM card with mass storage capability, comprising:

and the substrate is used for bearing the two-in-one control chip, the SIM contact, the SD contact and the flash memory chip and enabling the two-in-one control chip, the SIM contact, the SD contact and the flash memory chip to be electrically connected.

2. The SIM card with mass storage function of claim 1, wherein the two-in-one control chip comprises:

the CPU is used for running a firmware program and coordinating the running of each functional module in the two-in-one control chip according to the requirement of the firmware program;

a ROM for storing a firmware program;

3. The SIM card with mass storage function of claim 2,

the flash memory controller, the DMA data controller, the SD protocol controller, the RAM, the special algorithm module, the ROM, the SIM interface controller and the timeout timer are all electrically connected with the CPU;

the SD protocol controller is electrically connected with the SD interface;

the SIM interface controller is electrically connected with the SIM interface;

the SIM interface controller is electrically connected with the data memory;

4. The SIM card with mass storage function of claim 2, wherein the dedicated algorithm module comprises A3, A8 encryption algorithm and national cipher algorithm, wherein the encryption algorithm is used for the SIM card, and the national cipher algorithm is used for encrypting data used by the SIM card and the SD card.

5. The SIM card with mass storage function of claim 2,

the SD interface version comprises SD1.0, SD2.0, SD3.0, SD4.0, SD5.0, SD6.0 and SD 7.0;

the SIM interface conforms to the ISO/IEC7816 protocol.

6. The SIM card with mass storage function of claim 2,

the two-in-one control chip is provided with an SIM interface aluminum pad and an SD interface aluminum pad;

the SIM interface aluminum pad is electrically connected with the SIM contact;

the SD interface aluminum pad is electrically connected with the SD contact.

7. The SIM card with mass storage function of claim 2, wherein the two-in-one control chip further comprises: the device comprises a power supply management module, a clock generation module and a voltage detection module.

8. The SIM card with mass storage function of claim 7, wherein the CPU, the RAM, the ROM, the data storage module, the power management module and the clock generation module are all SIM card and SD card function multiplexing modules.