CN1851733A - FLASH storage medium based SIM card - Google Patents
FLASH storage medium based SIM card Download PDFInfo
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- CN1851733A CN1851733A CN 200610051722 CN200610051722A CN1851733A CN 1851733 A CN1851733 A CN 1851733A CN 200610051722 CN200610051722 CN 200610051722 CN 200610051722 A CN200610051722 A CN 200610051722A CN 1851733 A CN1851733 A CN 1851733A
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Abstract
The present invention discloses a FLASH storage medium based on SIM card, including housing, interface boundary element, central processing unit, working memory, program memory and data memory; wherein said data memory adopting FLASH storage medium based on flush memory module, flush memory module through FLASH bus through flush memory accessing interface communicating with central processing unit. Said interface boundary element is mixed interface unit, including serial IO interface and FLASH memory card interface. The present invented SIM card uses mass memory space FLASH to substitute original EEPROM as storage medium without changing original SIM card shape and structure, greatly increasing SIM card storage space fitting bulk storage.
Description
Technical field
The present invention relates to a kind of Subscriber Identity Module (SIM card), refer in particular to a kind of SIM card based on the FLASH storage medium.
Background technology
SIM card is to be used for that the GSM user identity is differentiated and a kind of smart card of data storage, and it can insert in any mobile phone that meets the GSM standard, constitutes mobile communication terminal device jointly with mobile phone.Common SIM card is the smart chip card that has microprocessor, and as storage medium, as shown in Figure 1, its structure generally comprises with EPROM/EEPROM:
(1) CPU (central processing unit) (CPU)
(2) program storage (ROM): store operation system master routine, can not change.
(3) working storage (RAM): the storage medium of volatibility provides the temporarily providing room of program and data in the work.
(4) data-carrier store (EPROM/EEPROM): non-volatile storage medium, as operating system application program and memory of data.
(5) serial i O interface: I/O data by turn.
It is generally acknowledged that EEPROM can carry out single bit (position) or single Byte (byte) data write, the read or write speed of supporting the single Byte of single bit/ is than very fast, so existing SIM card all is storage medium with EEPROM.Thus, the memory capacity of SIM card depends on the capacity of the EEPROM of card.Because EEPROM relatively expends chip area (DIE SIZE), chip area is directly corresponding to chip cost, therefore high capacity EEPROM implements the comparison difficulty, practical commercialization should be done not quite by the capacity of using, generally all have only (KB unit representation 1024 bytes) such as 4KB, 8KB, 16KB, 32KB, 64KB, SIM card mostly is 16KB and 32KB at present.
Analyze from the semiconductor devices angle, the storage space of same capacity is as 16KB, suppose that the integrated circuit chip area of realizing with EEPROM, EPROM technology is 1, the integrated circuit chip area of realizing with the FLASH technology then is 1/N, and according to different technology and design, N is between 3-20.And integrated circuit chip area and cost are quadratic relationship basically, promptly same capacity, and the realization cost of EEPROM, EPROM is the N of FLASH
2Doubly, this restricts present SIM card capacity exactly from the KB order of magnitude, moves towards the MB (=1024KB) order of magnitude even the GB (=1024MB) bottleneck of the order of magnitude.
Begin to support the multimedia service such as camera function, shooting, audio frequency, video flowing of mega pixel along with mobile phone, mobile phone is increasing to the demand of memory capacity, the capacity of EEPROM tens KB can not satisfy the storage demand of mobile phone gradually, for this reason, many mobile phones producer satisfies the storage demand that mobile phone is up to a hundred million, go up gigabit by being equipped with external FLASH memory card interface.Like this, mobile phone just needs to insert two cards, i.e. SIM card and FLASH storage card, and this has not only increased the volume of mobile phone, has also increased the cost of mobile phone.
Summary of the invention
The invention provides a kind of SIM card based on the FLASH storage medium, on the basis that keeps existing SIM card resemblance, as storage medium, can directly support up to a hundred million with the alternative original EEPROM of the FLASH of high capacity storage space, the storage space of last gigabit is fit to the high capacity storage.
A kind of SIM card based on the FLASH storage medium, comprise shell, connection interface unit, CPU (central processing unit), working storage, program storage and data-carrier store, described data-carrier store adopts the flash memory module based on the FLASH storage medium, and flash memory module passes through the FLASH bus through flash memory access interface and CPU (central processing unit) communication.
Described connection interface unit is the hybrid interface unit, comprises serial i O interface and FLASH memory card interface, and serial i O interface is traditional SIM card interface, and the FLASH memory card interface meets one of following interface specification: SD standard, MMC standard, MS standard.
Described flash memory module is connected with the flash memory access interface by standard FLASH bus interface, a pin of the corresponding flash memory access interface of each signal of bus, these pins of central processing unit controls, make its waveform, realize operation flash memory module by the sequential requirement output corresponding signal line of various FLASH.
SIM card of the present invention can provide enough storage spaces, and numerous quantity of information can directly be stored on the SIM card, and the mobile phone that is not equipped with the FLASH storage card slot can have the bulky information storage space too.Thereby user's application message (such as address list, E-MAIL etc.) can directly be stored in the SIM card, when the client changes mobile phone, as long as keep original SIM card, just can easily be transplanted to new cell-phone to all personal information, do not re-enter or operation such as copy and do not need to pass through.
Compare with existing common SIM card, the advantage of SIM card of the present invention is as follows:
With FLASH as storage medium, the storage space of vast capacity can be provided.
Flash memory module can be used as independent module and card other module separately, the user can select the SIM card of different capabilities.Also can be integrated into single circuit chip to other modules of flash memory module and card.
3. flash memory module not only can be used for store data, also can be used for depositing program.The application program of card is preset in the flash memory module, and CPU utilizes the base program among the ROM, goes to read the program of depositing in advance in the flash memory module automatically, carries out the application program among the SRAM then.
4. according to 3 characteristics of describing, the program of depositing in the flash memory module can be upgraded as required, therefore, can support the more application program of neocaine of user or producer, increases new function, to satisfy the needs in the market that constantly changes.
SIM card of the present invention is a backward compatibility, though promptly increased These characteristics, has still kept the characteristics and the function of existing SIM card, is the improvement to existing SIM card scheme, compatible simultaneously existing SIM card scheme.
The FLASH storage medium of indication of the present invention specifically refers to the FLASH of AND/NAND structure construction or with the FLASH of OR/NOR structure construction.
Description of drawings
Fig. 1 is the structural representation of existing common SIM card;
Fig. 2 is the structural representation of SIM card of the present invention.
Embodiment
As shown in Figure 2, a kind of SIM card based on the FLASH storage medium, comprise shell 1, connection interface unit 2, CPU (central processing unit) 4, working storage 3, program storage 5 and data-carrier store, data-carrier store adopts the flash memory module 7 based on the FLASH storage medium, and flash memory module 7 passes through the FLASH bus through flash memory access interface 6 and CPU (central processing unit) 4 communications.
Shell 1: have the definition of contour structures identical and interface signal with the common SIM card of act.std.
Connection interface unit 2: this unit is the hybrid interface unit, comprise serial i O interface and FLASH memory card interface: serial i O interface is traditional SIM card interface, be used for compatible traditional SIM card, the FLASH memory card interface is fit to the communication of high capacity information, meets one of following interface specification: SD standard, MMC standard, MS standard.
The implementation method of hybrid interface can be utilized the NC pin of traditional SIM card interface, to add the MMC3.3 interface specification in traditional SIM card interface is that example illustrates: traditional SIM card interface has 8 pins, comprise 5 signal pins (power supply,, reset, clock, serial input and output) and 3 NC, 3 NC pin are defined as clock (CLK) in the MMC3.3 standard, order (CMD) and data (DATA) line respectively, then this hybrid interface had both comprised traditional SIM card interface, had also comprised the MMC3.3 standard.
Working storage (RAM) 3: this element is the storage medium of volatibility, and the temporarily providing room of program and data in the work is provided.When the card power-off, all data that are stored in the RAM the inside all can be lost.
CPU (central processing unit) (CPU) 4: finish processing, transmission and configuration to received data and control signal, simultaneously also with the flash memory access interface together, finish operation, as the order of reading and writing, wiping, backup etc. to the FLASH memory module.
Program storage (ROM) 5: storage CPU base program, can not change.After powering on, this program run, the FLASH storage media types of judgement flash memory module 7 reads the application program that is preset in the flash memory module 7, and automatically switches to working storage RAM3 execution.This program also support application program is downloaded to the operation of flash memory module 7.
Flash memory access interface (FLASHAccess Interface) 6: flash memory access interface 6 is by CPU (central processing unit) 4 control, produces the required interface signals of visit flash memory module 7, is the FLASH bus signals between flash memory access interface 6 and the flash memory module 7.
Flash memory module (FLASH) 7: adopt FLASH as storage medium, can be used as SIM card application program and memory of data, also can be used as multimedia application and memory of data.The FLASH storage medium has non-volatile, and when the card power-off, all data that are stored in the FLASH the inside all can continue to preserve.
SIM card of the present invention has and the identical shell of common SIM card, has kept the interface of existing standard SIM card, thereby has guaranteed that SIM card of the present invention and existing SIM card are compatible, can be used on the application of existing SIM card.
Flash memory access interface 6 is connected by standard FLASH bus interface with flash memory module 7, comprise CE1_, CE0_, RE_, WE_, CLE_, ALE_, WP_, BUSY_, DA[7:0] etc. leg signal, define the corresponding register of each leg signal, produce high and low level by the corresponding register of CPU (central processing unit) 4 controls, form the waveform of each leg signal by the sequential requirement of various FLASH, realize various operations such as reading and writing, wiping flash memory module (7).
Flash memory module 7 can be realized with at least one independent F LASH device, also can integrate with other modules, becomes a single large scale integrated chip.
The application program of SIM card of the present invention can be predisposed in the flash memory module 7, and the process that presets can realize by the CPU base program in the program storage 5.
After powering on, the CPU base program in the program storage 5 at first starts, and reads the application program that is preset in the flash memory module 7, and automatically switches to working storage 3 execution, moves real SIM card application program.
Claims (3)
1. SIM card based on the FLASH storage medium, comprise shell (1), connection interface unit (2), CPU (central processing unit) (4), working storage (3), program storage (5) and data-carrier store, it is characterized in that: described data-carrier store adopts the flash memory module (7) based on the FLASH storage medium, and flash memory module (7) passes through the FLASH bus through flash memory access interface (6) and CPU (central processing unit) (4) communication.
2. the SIM card based on the FLASH storage medium as claimed in claim 1, it is characterized in that: described connection interface unit (2) comprises serial i O interface and FLASH memory card interface, and the FLASH memory card interface meets a kind of of SD standard, MMC standard or MS standard.
3. the SIM card based on the FLASH storage medium as claimed in claim 1, it is characterized in that: described flash memory module (7) is connected with flash memory access interface (6) by standard FLASH bus interface, a pin of the corresponding flash memory access interface of each signal (6) of bus, CPU (central processing unit) (4) is controlled these pins, make its waveform, realize operation flash memory module (7) by the sequential requirement output corresponding signal line of various FLASH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610051722 CN1851733A (en) | 2006-05-29 | 2006-05-29 | FLASH storage medium based SIM card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610051722 CN1851733A (en) | 2006-05-29 | 2006-05-29 | FLASH storage medium based SIM card |
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| Publication Number | Publication Date |
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| CN1851733A true CN1851733A (en) | 2006-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610051722 Pending CN1851733A (en) | 2006-05-29 | 2006-05-29 | FLASH storage medium based SIM card |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008080323A1 (en) * | 2006-12-30 | 2008-07-10 | Phoenix Microelectronics (China) Co., Ltd. | Smart card for supporting high performance computation, mass storage, high speed transmission and new application |
| WO2011060703A1 (en) * | 2009-11-18 | 2011-05-26 | 中兴通讯股份有限公司 | Method and device for implementing electrically-erasable programmable read-only memory |
| CN105653470A (en) * | 2007-09-03 | 2016-06-08 | 国泰银恩企业有限责任公司 | Mobile communication device and method for swapping mifare applications |
-
2006
- 2006-05-29 CN CN 200610051722 patent/CN1851733A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008080323A1 (en) * | 2006-12-30 | 2008-07-10 | Phoenix Microelectronics (China) Co., Ltd. | Smart card for supporting high performance computation, mass storage, high speed transmission and new application |
| CN105653470A (en) * | 2007-09-03 | 2016-06-08 | 国泰银恩企业有限责任公司 | Mobile communication device and method for swapping mifare applications |
| WO2011060703A1 (en) * | 2009-11-18 | 2011-05-26 | 中兴通讯股份有限公司 | Method and device for implementing electrically-erasable programmable read-only memory |
| CN102063939B (en) * | 2009-11-18 | 2015-01-28 | 中兴通讯股份有限公司 | Method and device for implementing electrically erasable programmable read-only memory |
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