CN2831247Y - Tax monitor - Google Patents

Abstract

The utility model relates to a tax controller, which belongs to the technical field of financial computer management devices. For solving the defects that the existing tax controller can only report tax but can not realize tax control, and simultaneously the existing tax controller has poor memory performance and inconvenient external communication, the tax controller of the utility model comprises a central processing module, an IC card read/write module, a communication module and a non-volatile storage module, wherein the central processing module is connected with a memory and a latch; the IC card read/write module is respectively connected with the memory and the latch through a user card read/write circuit and a tax-control card read/write circuit contained in the IC card read/write module; the communication module is respectively connected to a standard port and a communication port of the central processing module; a data access port of the central processing module is connected with the non-volatile storage module through a data/address line. After the tax controller is taken, because data can be ensure to correctly generate, and the reliable storage and the safe transmission can be realized; the utility model can facilitate management and data check of tax authorities.

Description

The Design of Tax Controled Device

Technical field

The utility model relates to a kind of electronic installation of realizing tax control function, and is especially a kind of in order to realize the electronic installation of tax control function under cooperating at electronic equipments such as computing machines, belongs to banking machine handling facility technical field.

Background technology

By micro computer cooperate the electronic installation of the function of declaring dutiable goods have easy to operate, be easy to advantage such as data preservation, therefore be applied.Its typical structure such as application number by 94219723, the name Chinese patent application that is called " machine of declaring dutiable goods " put down in writing, mainly read circuit, display, display driver circuit, data/address latch, data-carrier store level shifting circuit and form by single-chip microcomputer, keyboard, keyboard.Further improvement on this basis is reflected in that application number is 99230524, name is called in the Chinese patent application of " the multi-functional tax reporter of IC-card ", this tax reporter is except the circuit component part that contains aforementioned tax reporter, also comprise the IC-card read-write control circuit, therefore use more convenient.

Yet along with the raising day by day of development of science and technology and tax administration level, above prior art shows improves part inadequately.For example, the function of only declaring dutiable goods can not realize tax control; Memory reliability is relatively poor; Convenient inadequately with the communication of external unit; Or the like.

Summary of the invention

The technical problems to be solved in the utility model is: at the defective of above prior art existence, propose a kind ofly not only can guarantee that management data correctly generates, and can realize reliable memory, safe transmission, satisfy the The Design of Tax Controled Device of tax authority's management and data check requirement.

In order to solve above technical matters, The Design of Tax Controled Device of the present utility model comprises the central processing module of realizing programmed control and data processing, storer that links to each other with central processing module and latch, and IC-card module for reading and writing, described IC-card module for reading and writing comprises subscriber card read/write circuit and tax-controlling card read/write circuit, the signal wire of described subscriber card read/write circuit and tax-controlling card read/write circuit is connected with central processing module, contain communication module and non-volatile memory module in addition, the PORT COM of described central processing module connects standard port by communication module, its data access port be connected with the non-volatile memory module by data/address wire.

During work, the user can pass through the IC-card module for reading and writing, realize easily on subscriber card and the tax-controlling card that the message exchange of central processing module is handled in the tax-control data and The Design of Tax Controled Device, central processing module then not only can reliably be kept at tax-control data and business data etc. in the non-volatile memory module, and can realize communication contact by standard port and external unit easily, thereby make things convenient for the management and the data check of the tax authority greatly.

Description of drawings

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is the structured flowchart of an embodiment of the utility model.

Fig. 2 is the circuit theory diagrams of Fig. 1 embodiment.

Embodiment

Embodiment one

The The Design of Tax Controled Device of present embodiment as shown in Figure 1, MCU module with realization programmed control and data processing is a core, and the MCU module is connected with power module with IC-card module for reading and writing, FLASH nonvolatile memory, RAM storer and latch, clock module, communication module and state indicating module respectively.

Its physical circuit as shown in Figure 2, each several part detailed functions and principle are described below:

A, power module :+5VDC power supply is provided by host or external power adapter.The integrated circuit ATT3236 (N6) that changes 3.3V through 5V provides working power for system.Input circuit as shown in Figure 2, the 5V input end is connected to inductive bank and filter capacitor.L1, L2, L3 are filter inductances.F1 is a resettable fuse.C19 is the shunt capacitance that cooperates ATT3236.C22, C25 are the filter capacitors that cooperates.

B, MCU are by MSP430F149 single-chip microcomputer (N2), ADM-809Up (N1) supervisory circuit, and the 8MHZ oikocryst shakes (G2), the auxiliary crystal oscillating circuit of 32.768KHZ (G1) is formed.It is the nucleus module of whole The Design of Tax Controled Device, is responsible for operation of data, processing, and the work of other module is coordinated in control.

The JTAG1 of MSP430F149 single-chip microcomputer N2 is that program is downloaded mouth, downloading-running program easily.When The Design of Tax Controled Device powered on, the ADM809-T integrated circuit was sent reset signal by R23 to the reset terminal of CPU, reset level 3V.The G1 of crystal oscillator part cooperates with the CPU internal circuit provides 32.768KHz oscillator signal.G2 cooperates to CPU with G1 provides 8MHZ oscillator signal.

The memory chip 62LV256 (N6) of C, RAM 32KX8.Metadata cache space when providing system to move.MCU is by I/O mouth emulation bus time sequential routine visit RAM.

D, clock module: PCF8563 clock chip (N5) is formed with rechargeable battery and resistance, electric capacity, diode, for The Design of Tax Controled Device provides the time, and date and time information.The CF8563 clock chip uses the 32.768KHZ crystal oscillator.MCU can pass through SZ-CK, and two signal wires of SZ-DA (I2C bus) read and write clock information.

E, FLASH nonvolatile memory, FLASH ROM K9F series (N4) the storage tax-control data of 8M or 16M (optional) byte and other need power down to preserve data.8 position datawires that the shared CPU of data and address wire comes at the place.

F, IC-card module for reading and writing: this module all is made up of discrete device.Its effect is the data that read on the tax control IC-card.Top is the Card Reader circuit of reading subscriber card.IC1 among the figure is the deck of IC.Pass through IC-DA1 during the CPU Card Reader, IC-CLK1, IC-RST1, IC-SW1, the information on the IC-card is operated, read to five signal wires of IC-CTR1.V5, R19 form simple level shifting circuit.RS2 and R11 are pull-up resistor.R14, R16, V4, V7, the common composition of T5, T2 can be subjected to the IC-card power circuit of IC-CTR1 Signal-controlled switch, and have short-circuit protection function, promptly constitute the fast interface holding circuit by discrete device in the IC-card peripheral circuit.

The bottom is the Card Reader circuit that reads tax-controlling card, principle with read the consistent of subscriber card, circuit has omitted short-circuit protection.

The effect of G, communication module: level transferring chip MAX202 (N3) is the serial communication between realization and PC or the POS machine.Its output port is the standard RS232 port (female) of 9 pins.MAX202 chip and C3, C4, C5, C6 finish the serial communication function.V1, V2, R1, R2, R5, R6 forms level shifting circuit.Serial signal is exported by J1.The 5V power supply of The Design of Tax Controled Device is also imported by J1.

H, state indication: The Design of Tax Controled Device adopts light emitting diode as power light and reading and writing IC card pilot lamp, adopts hummer as prompt tone.H1 is the Card Reader pilot lamp, Card Reader or when writing card, this lamp is bright.H2 is a power light.

I, The Design of Tax Controled Device contain the lead sealing protection, satisfy circuit and security needs.

Facts have proved, the The Design of Tax Controled Device stable performance of present embodiment, processing ease, convenient with outer computer or POS machine communication contact, have following advantage:

1. adopt the host power supply, simplify circuit design, strengthen the reliability and the Electro Magnetic Compatibility of The Design of Tax Controled Device.

Match with design 2.MCU contain watcholog and power supply supervisory circuit, avoid fully because the MCU illegal operation that brings out of control.

3. adopt the online programming technology, but the code upgrading.

Between core MCU module and the peripheral module be connected all with simulated-bus the time sequential mode work, the diversity of can upgrade flexibly memory span and peripheral components is selected.

5. external interface (IC-card and serial line interface) has quick defencive function, can avoid the misconnection of signal wire, the permanent damages that the contact medium misuse causes The Design of Tax Controled Device.

In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation, all drop on the protection domain of the utility model requirement.

Claims (4)

1. The Design of Tax Controled Device, comprise the central processing module of realizing programmed control and data processing, storer that links to each other with central processing module and latch, and IC-card module for reading and writing, it is characterized in that: described IC-card module for reading and writing comprises subscriber card read/write circuit and tax-controlling card read/write circuit, the signal wire of described subscriber card read/write circuit and tax-controlling card read/write circuit is connected with central processing module, contain communication module in addition, non-volatile memory module and clock module, the PORT COM of described central processing module connects standard port by communication module, and its data access port is connected with the non-volatile memory module by data/address wire.

2. according to the described The Design of Tax Controled Device of claim 1, it is characterized in that: the single-chip microcomputer in the described central processing module contains program downloads mouth.

3. according to the described The Design of Tax Controled Device of claim 2, it is characterized in that: described communication module contains the level transferring chip of serial communication between realization and PC or the POS machine, and its output port is a standard RS232 port.

4. according to the described The Design of Tax Controled Device of claim 2, it is characterized in that: constitute the fast interface holding circuit by discrete device in the peripheral circuit of described IC-card.

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