CN200953147Y

CN200953147Y - Tax-control equipment nonvolatile memory safety protector

Info

Publication number: CN200953147Y
Application number: CNU2006200709428U
Authority: CN
Inventors: 王平; 朱海伟; 徐维磊
Original assignee: Xiongmao Electromechanical Inst Rument Technology Co Ltd Nanjing; Nanjing Panda Electronics Co Ltd
Current assignee: Xiongmao Electromechanical Inst Rument Technology Co Ltd Nanjing; Nanjing Panda Electronics Co Ltd
Priority date: 2006-04-04
Filing date: 2006-04-04
Publication date: 2007-09-26
Anticipated expiration: 2016-04-04

Abstract

A tax controlled equipment nonvolatile memory safety protective device, with the NAND and NOR nonvolatile memories as the tax controlled data memory, and equipped with the individually separated tax controlled data nonvolatile storage special PCB, compatible for installing the NAND and NOR nonvolatile memories, the special PCB has the memory plug-in interface. This utility model simultaneously considers the requirements for replacing the tax controlled nonvolatile data storage medium, ensure the tax controlled nonvolatile data storage medium can't be replaced without authorization, plays the lead seal functions. The tax controlled data may be safely guided out from the damaged tax controlled equipment and written into a new tax controlled equipment. Protect the tax controlled equipment nonvolatile memory during replacing.

Description

The security protective device of tax controlling equipment nonvolatile memory

Technical field

The utility model belongs to the technical field of infotech and electronic technology and robotization tax controlling equipment.The security protective device of the security protective device that relates to a kind of important storer, especially tax controlling equipment nonvolatile memory.

Background technology

The tax is the lifeblood of national economy, thereby the design of tax control product is extremely important.In many indexs of estimating the tax control product motherboard design, the security that it has been generally acknowledged that tax control is primary.Especially tax controlling equipment faces in the applied environment of various complexity, and is particularly important to the requirement of the safety Design of data, comprise the design of the access mode of data is considered, nonvolatile memory the design in serviceable life consider etc.The tax-control data storer is important data, needs the security protective device, does not relate to the special design of tax-control data memory-safe protective device as having in infotech and electronic technology and the robotization tax controlling equipment at present.Selection to the tax-control data storer does not have special concern.

Summary of the invention

The purpose of this utility model is: in order to solve the problem of Nonvolatile data security aspect in the tax controlling equipment design; especially solve in the replacing mechanism of tax controlling equipment nonvolatile memory problem, propose a kind of tax-control data memory-safe protective device for the protection of security, validity and the integrality of tax-control data.And can realize being subjected to still can deriving the data in the non-volatile memory medium easily under the situation of force majeure infringement when machine.

The technical solution of the utility model is: the security protective device of tax controlling equipment nonvolatile memory; comprise that following apparatus constitutes: select for use with non-(NAND) and or the nonvolatile semiconductor memory member of non-(NOR) two types as the tax-control data storer; the utility model is the separable tax-control data non-volatile memories dedicated printed circuit board of design separately, can be compatible and non-(NAND) and or the nonvolatile semiconductor memory member of non-(NOR) two types.For the connected mode of tax-control data memory circuit plate and mainboard, the utility model has designed can plug the device that interface combines with stationary anchor points.

Of the present utility model the former has taken into account the replacing requirement of tax control non-volatile data storage medium, and the latter has guaranteed that the tax control non-volatile data storage medium can not arbitrarily be changed, and plays lead seal function.

The beneficial effects of the utility model: the utility model has been realized the derivation mechanism and the derivation equipment of tax control Nonvolatile data, make that when equipment is damaged tax-control data can be safe derive and be written in the new tax controlling equipment gone from impaired tax controlling equipment.

Safeguard measure when 1, the realization of solution tax controlling equipment nonvolatile memory is changed,

2, reaching realization is subjected to when machine still can deriving the data in the non-volatile memory medium easily, and copying in another tax controlling equipment under the situation of force majeure infringement.The utility model has been done the protection of corresponding measure for the replacing mechanism of non-volatile data storage; and designed special-purpose tax-control data derivation technology; when ensureing safe in utilization and reliability; be subjected at machine still can deriving the data in the non-volatile memory medium easily under the situation of force majeure infringement.

Description of drawings

The NOR type that Fig. 1 the utility model is selected for use and the circuit diagram of nand type memory

Fig. 2 the utility model memory circuit plate and locking pin structural representation

Fig. 3 the utility model central processing unit (CPU) circuit diagram

Locking pin 1, data store-specific printed circuit board (PCB) 2 among Fig. 2, can plug single pin 3.

Embodiment

As shown in the figure: 1, separable tax-control data non-volatile memories dedicated printed circuit board, models such as 32M NAND type K9F5608 that 4M NOR type SST39VF3201 that employing SST company produces and Samsung company produce and K9F1208.Connection principle as shown in Figure 1.

2,, designed the single pin that plugs of 2 rows, 24 pin, in order to realize the replacing of memory circuit plate on the mainboard and on the separable tax-control data non-volatile memories dedicated printed circuit board.Simultaneously, at the wiring board two ends, all designed 1-4 locking pin.Totally 4 locking pins among the embodiment, the memory circuit plate be inserted into install on the mainboard appropriate after, can weld this 4 locking pins, to increase the reliability of pegging graft.Locking pin plays lead seal function simultaneously: behind product export, the memory circuit plate must be cut off locking pin before dismantling down from mainboard.As shown in Figure 2.The described interface that plugs memory device is to plug single pin 3.

3, tax-control data let-off gear(stand) design:

(1) the single-chip microcomputer C33205 of the high-performance of central processing unit (CPU) employing EPSON production, 32bitRISC structure, 40MHz dominant frequency.(seeing accompanying drawing 3).The operation embedded Linux system.

(2) storage unit interface circuit: 2 non-volatile data memory circuit board interface with two address spaces.Simultaneously, also support the file system of two kinds of nonvolatile semiconductor memory members:, adopt JFFS for NOR type storer; For nand type memory, adopt YAFFS.Utilize (SuSE) Linux OS and file system, the data in the block storage circuit board can be read and are written in another block storage circuit board.YAFFS be along with NAND as the popularizing of large-capacity storage media, be applied in the embedded system based on the file system YAFFS (Yet Another Flash File System) of nand flash memory.YAFFS is similar to JFFS/JFFS2, is the embedded file system that designs for nand flash memory specially, is applicable to jumbo memory device.It is log-structured file system, and loss balancing and power down protection are provided, and can avoid the influence of unexpected power down to file system consistance and integrality effectively.The YAFFS file system designs by hierarchical structure, be divided into file system management layer interface, inner layer and the NAND interface layer realized of YAFFS, YAFFS has taken into full account the characteristics of nand flash memory, is the characteristics of unit access with the page according to nand flash memory, file group is made into the data segment of fixed size.

Claims

1, the security protective device of tax controlling equipment nonvolatile memory; it is characterized in that selecting for use with non-(NAND) and or the nonvolatile semiconductor memory member of non-(NOR) two types as the tax-control data storer; and be provided with the tax-control data non-volatile memories dedicated printed circuit board of independent separate type; compatible install with non-(NAND) and or the nonvolatile semiconductor memory member of non-(NOR) two types, dedicated printed circuit board is provided with the interface that can plug memory device.

2, by the security protective device of the described tax controlling equipment nonvolatile memory of claim 1; it is characterized in that for the syndeton of tax-control data storage dedicated printed circuit board and mainboard being; 1-4 locking pin established at the dedicated printed circuit board two ends, on the mainboard that the data store-specific printed circuit board (PCB) is fixing.

3,, it is characterized in that dedicated printed circuit board is provided with the single pin that plugs of 2 rows, 24 pin by the security protective device of the described tax controlling equipment nonvolatile memory of claim 1.

4,, it is characterized in that the storer of separable tax-control data non-volatile memories dedicated printed circuit board adopts 4M NOR type SST39VF3201 and 32M NAND type K9F5608 and K9F1208 by the security protective device of the described tax controlling equipment nonvolatile memory of claim 1.