CN2327016Y - Cashing machine of controlling tax - Google Patents

Abstract

The utility model relates to a tax control cashing machine, comprising a first SCM, an I/O expansion interface, a print control and the print heads thereof, an LCD and the interfaces thereof, a keyboard and the interfaces thereof, a program and data memorizer, an IC card insertion circuit, money box control interfaces, a power supply, an RS485 interface, and an RS232 interface. The utility model is characterized in that the first SCM is connected with an EEPROM circuit, the IC card insertion circuit, and the money box control interfaces and is connected to a second SCM through an observation circuit, and the second SCM is respectively connected with a real-time clock, the program and data memorizer, the I/O expansion interface, the RS485 interface, and the RS232 interface. The utility model can encipher program and data, can ensure data safety unmodifiable by users, and has complete functions of tax controlling.

Description

Tax-control cash register

The utility model relates to a kind of cashing machine, particularly a kind of tax-control cash register.

Existing cashing machine is not with tax control function, and prompts displayed all is English alphabet and some symbols, makes the cashier bring certain difficulty to the operation of cashing machine.And the program of some cashing machine and data all can be modified, and safety of data is not high.Each cashier does not have tangible authority, makes account not in order Chu.

It is a kind of to program, data encryption that the purpose of this utility model is to provide, and guaranteed the safety of data, and have the tax-control cash register of tax control function.

The purpose of this utility model can reach by following measure: the utility model comprises single-chip microcomputer, I/O expansion interface, prints control circuit, printhead, LCD interface circuit, LCD, keyboard interface, keyboard, memory under program, data memory, IC-card grafting circuit, cash box control interface, power supply, RS485 interface, RS232 interface, cabinet, it is characterized in that; Also have real time clock circuit, observation circuit, eeprom circuit, single-chip microcomputer, single-chip microcomputer and eeprom circuit, IC-card grafting circuit, cash box control interface join, single-chip microcomputer also links to each other with single-chip microcomputer by observation circuit, and single-chip microcomputer links to each other with real time clock circuit, memory under program, data memory, I/O expansion interface, RS485 interface, RS232 interface respectively.

The purpose of this utility model can also reach by following measure: the P11 of chip U1, P12 end links to each other with 5.6 pin of real-time timepiece chip U13, the T0 of U1, TXD, RXD, T1 end join by U19 and RS485 interface module U14, the TXD1 of U1, RXD2 join by U18 and RS232 interface module U7, the P20-P27 end of U1 links to each other with the A8-A15 end of U5, the P00-P07 end of U1 links to each other with the D0-D7 end of U2 and U5 respectively, and the Q0-Q7 end of U2 links to each other with the A0-A7 end of U5.The T0 of chip U11, T1, TMTO end link to each other with chip U10, and the P00-P07 end of U11 links to each other with the D0-D7 end of U6, U5 respectively, and the P20-P27 end of U11 links to each other with the A8-A15 end of U5, and the Q0-Q7 end of U6 links to each other with the R0-R7 end of U5.

Fig. 1 is a functional-block diagram of the present utility model;

Fig. 2 is a structural representation of the present utility model;

Fig. 3-Fig. 5 is an electrical schematic diagram of the present utility model.

The utility model is described in further detail below in conjunction with accompanying drawing (embodiment):

With reference to Fig. 1, the utility model is made up of single-chip microcomputer 1, single-chip microcomputer 2, I/O expansion interface 3, printing control circuit 4, printhead 5, LCD interface 6, LCD7, keyboard interface 8, keyboard 9, real-time clock 10, memory under program 11, data memory 12, observation circuit 13, eeprom circuit 14, IC-card interface 15, cash box control interface 16, power supply 17, RS485 interface 18, RS232 interface 19, cabinet etc.

With reference to Fig. 3-Fig. 5, real-time timepiece chip is DS1302, and the DS1302 volume is little, power consumption extremely low (working current is less than 300 microamperes during operating voltage 2V), the wide (+2V～5.5V) of operating voltage range.To variation of ambient temperature adaptability good (40 ℃-+85 ℃).Be welded with a 3.6V battery on the mainboard, when power down, keep the power supply of clock; Electric after, battery charges.The model of chip U18 is X25045, and three kinds of functions commonly used are arranged in the X25045: " house dog " timer, monitoring voltage and EEPROM are combined within the single encapsulation." house dog " timer provides the independent protection system simultaneously to 2 single-chip microcomputers.When system breaks down, after optional time out period, X25045 will respond with the RESET signal.Utilize low Vcc testing circuit, can protection system make it to avoid the influence of low voltage conditions.The storage of X25045 partly is the 4096 bit serial EEPROM of CMOS, and it is organized by 512 * 8 in inside.X25045 has three-way bus Serial Peripheral Interface (SPI) and software protocol, utilizes this EEPROM protection breakpoint or key message.X25045 (working current 3mA) low in energy consumption, the supply voltage permissible range is big, and (2.7～5V), it is convenient to use, and improves system reliability.The characteristics of chip U14 (model MAX485) are can long distance communication, about 1 kilometer, and communications protocol is simple, and memory is made of 3.2KSRAM and 74LS373 latch.One has two, the daily sale of storage in a slice, and another sheet is to deposit the tax control numerical control.Memory is linked with two CPU respectively by 8 position datawires and 15 bit address lines.

Printer is made of M-150 II movement and the control panel of EPSON, and the defeated population of data has connect the PC mouth of I/O extended chip, can finish the input function of parallel data.

Display lcd adopts the character point configuration of the M1615 type of STN type.Form is 16 words * 1 row.Be used to show the operation of Various types of data information indicating, can show the ASC II character of English, standard, and can show special character.Adopt modular design, adopt 8 position datawires and part control line to link with CPU, all show by programmed control, and are low in energy consumption.

Memory inside has encapsulated the 3.6V battery of a high lithium when encapsulating, after the cabinet power down, data can not lose.

During work, send reset signal by U18 (X25845), single-chip microcomputer work carries out that the serial port communication mode is selected and display lcd, printer are carried out initialization, and it is started working.Keyboard is scanning, and waits for button.In the sales process, display shows that corresponding operation discloses, and printer prints goes out little of corresponding sale simultaneously, sells and finishes, and data are deposited people's memory.Class's business finishes, and the checkout data are deposited among people's tax control parts EERPOM.

The utility model has following advantage compared to existing technology:

1, increases function exceeding under the condition that increases hardware cost, in order to support the user to expand The management on large scale scale.

2, in-local meets sale, management thought process. Show clearly, simple to operate, Remember easily and have immediately and correct that out-of-date corrigendum and refusal maloperation function provide friendly people The machine interface.

3, complete tax control function, the key problem of tax control is complete, credible, the safety of data.The encrypting IC card technology of application of advanced realizes the multistage rights management in tax office, user, the maintenance department, is foundation with reliable, believable tax-control data, provides and declares and the inspection means.

Claims (3)

1, a kind of tax-control cash register, comprise single-chip microcomputer (1), I/O expansion interface (3), print control circuit (4), printhead (5), LCD interface circuit (6), LCD (7), keyboard interface (8), keyboard (9), memory under program (11), data memory (12), IC-card grafting circuit (15), cash box control interface (16), power supply (17), RS485 interface (18), RS232 interface (19), cabinet, it is characterized in that; Also have real time clock circuit (10), observation circuit (13), eeprom circuit (14), single-chip microcomputer (2), single-chip microcomputer (2) joins with eeprom circuit (14), IC-card grafting circuit (15), cash box control interface (16), single-chip microcomputer (2) also links to each other with single-chip microcomputer (1) by observation circuit (13), and single-chip microcomputer (1) links to each other with real time clock circuit (10), memory under program (11), data memory (12), I/O expansion interface (3), RS485 interface (18), RS232 interface (19) respectively.

2, cashing machine according to claim 1 is characterized in that; The P11 of chip U1, P12 end links to each other with 5.6 pin of real-time timepiece chip U13, the T0 of U1, TXD, RXD, T1 end join by U19 and RS485 interface module U14, the TXD1 of U1, RXD2 join by U18 and RS232 interface module U7, the P20-P27 end of U1 links to each other with the A8-A15 end of U5, the P00-P07 end of U1 links to each other with the D0-D7 end of U2 and U5 respectively, and the Q0-Q7 end of U2 links to each other with the A0-A7 end of U5.

3, cashing machine according to claim 1, it is characterized in that: the T0 of chip U11, T1, TMTO end link to each other with chip U10, the P00-P07 end of U11 links to each other with the D0-D7 end of U6, U5 respectively, the P20-P27 end of U11 links to each other with the A8-A15 end of U5, and the Q0-Q7 end of U6 links to each other with the R0-R7 end of U5.

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