CN200986728Y - Tax Controller - Google Patents
Tax Controller Download PDFInfo
- Publication number
- CN200986728Y CN200986728Y CN 200620052505 CN200620052505U CN200986728Y CN 200986728 Y CN200986728 Y CN 200986728Y CN 200620052505 CN200620052505 CN 200620052505 CN 200620052505 U CN200620052505 U CN 200620052505U CN 200986728 Y CN200986728 Y CN 200986728Y
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- China
- Prior art keywords
- power
- module
- power supply
- tax
- usb interface
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- Expired - Fee Related
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Abstract
The utility model discloses a tax controlling machine comprising a power module, a memory unit of the tax controlling information connected with a data bus and an USB interface module having CRC checking used for the communication with a PC and supplied by the PC. The USB interface module is connected with a main control module through a parallel port for the data interchange. The utility model can not only communicate with the PC, but also provide a power supply for the tax controlling machine through the PC without an external power supply adapter, thereby reduces the cost of the complete machine and makes the structure simple and compact effectively; the USB interface is more stable than RS-232 communication interface, of which the communication speed is also quicker; thereby the quality of the tax controlling machine is improved notably.
Description
Technical field
The utility model relates to a kind of The Design of Tax Controled Device.
Background technology
The Design of Tax Controled Device has been widely used in the business activities; but what the communication interface of The Design of Tax Controled Device adopted at present is the RS-232 communication interface; for power module, just must use the external power adapter power supply like this; increased the cost of The Design of Tax Controled Device thus; and the stability of RS-232 communication interface is poor slightly, communication speed is also slower; The Design of Tax Controled Device does not generally have power-off protection apparatus at present in addition, is easy to occur loss of data under power down suddenly or the unsettled situation of power supply.
The utility model content
The purpose of this utility model is to provide that a kind of cost is low, stable performance, the fast The Design of Tax Controled Device of communication speed.
This The Design of Tax Controled Device that the utility model provides, be included as each module the power module of power supply be provided, be connected main control module and tax information storer on the data bus, also be connected with on the data bus band CRC check be used for the PC communication and provide the usb interface module of power supply, this usb interface module to be connected by the parallel port with described main control module by PC carry out exchanges data.
The utility model is owing to adopted usb interface module, it can not only carry out communication with PC, simultaneously can also provide power supply for this The Design of Tax Controled Device by PC, and do not need external power adapter, reduced the complete machine cost thus effectively and made complete machine structure simply compact, USB interface is stable better than RS-232 communication interface simultaneously, and communication speed is faster, and the The Design of Tax Controled Device quality is significantly improved.
Description of drawings
Fig. 1 is a block scheme of the present utility model.
Fig. 2 is a circuit diagram of the present utility model
Fig. 3 is a usb interface module circuit diagram of the present utility model.
Fig. 4 is the utility model power module circuitry figure.
Embodiment
The utlity model has power module as can be seen, be connected main control module, tax information memory module, FLASH memory module, IC-card module for reading and writing, calendar clock module on the data bus from Fig. 1 and Fig. 2, also be useful on the PC communication and by PC the usb interface module of power supply is provided, this usb interface module also is connected on the data bus.
In conjunction with Fig. 3 as can be seen usb interface module adopted the PDIUSBD12 chip, be connected by the parallel port with main control module by the PDIUSBD12 chip and carry out exchanges data.Between PDIUSBD12 chip and USB interface, be connected in series the interface chip STF202-22T1 of a slice band EMI filtering, esd protection, improving the USB interface antijamming capability, provide power supply to power module by USB interface and PC communication and for this The Design of Tax Controled Device.
In conjunction with Fig. 4 as can be seen the circuit of power module constitute, this circuit comprises the feed circuit of delaying time after power supply stabilization circuit, power-fail detection circuit and the power down, wherein, power supply stabilization circuit is made up of boost chip NCP1450ASN50T1 and peripheral components thereof of DC/DC, when the voltage of VIN+2.0V～+ during the 5.5V scope, but voltage stabilizing output+5V voltage.Power supply stabilization circuit also comprises by the voltage stabilizing of three terminal regulator NCP1117ST33T3 general+5V voltage and is+3.3V voltage, power supply is provided for each module on the The Design of Tax Controled Device motherboard circuit by+3.3V voltage.
Power-fail detection circuit is connected between main control module and the power supply stabilization circuit, when The Design of Tax Controled Device had electricity, detection of power loss signal VINT was+4.3V about, after chip ASM809SEUR-T detected, power-off signal INTO was a high level; During the The Design of Tax Controled Device power down, when detection of power loss signal VINT reduced to 3.08V, chip ASM809SEUR-T made power-off signal INTO become low level, is sent to main control module then, and main control module enters the power down protection program, keeps data and various state.
The time-delay feed circuit are positioned at the input end of power supply stabilization circuit after the power down, and each module on the The Design of Tax Controled Device motherboard circuit externally can be worked more than 10 seconds behind the power supply power-fail.The time-delay feed circuit mainly are made up of farad capacitor C39, C40 after the power down, and when tax control machine had electricity, to the farad capacitor charging, farad capacitor was by diode V11 discharge during power down by resistance R 3 for the VIN end.Because the voltage of VIN end can be low to moderate+2V, so can make full use of the electric weight of farad capacitor.
What see Fig. 1 and Fig. 2 again the tax information memory module adopts as can be seen is ferroelectric memory FM24CL64 chip, and this is a kind of ferroelectric nonvolatile storer of 64K position of being processed into by the ferroelectric material of advanced person, high reliability.It can and have non-volatile as the fast reading and writing data of RAM.Data can be preserved 10 years after power down, and it is higher than EEPROM and other nonvolatile memory system reliabilities, and structure is simpler, and energy consumption is lower.FM24CL64 and main control module adopt the two-wire system communication, can save the main control module resource.
Claims (3)
1. The Design of Tax Controled Device, be included as each module the power module of power supply be provided, be connected main control module and tax information storer on the data bus, it is characterized in that also being connected with on the data bus band CRC check be used for the PC communication and provide the usb interface module of power supply, this usb interface module to be connected by the parallel port with described main control module by PC carry out exchanges data.
2. The Design of Tax Controled Device according to claim 1, it is characterized in that power module comprises the feed circuit of delaying time after power supply stabilization circuit, power-fail detection circuit and the power down, wherein power supply stabilization circuit mainly by the DC/DC that is used for voltage stabilizing output+5V boost chip and peripheral circuit, output+3.3V three terminal regulator, surpass the insurance F1 of recovery certainly and the catching diode V17 that press protection and form; Described power-fail detection circuit mainly is made up of chip ASM809SEUR-T, and for main control module provides power detection signal, the time-delay feed circuit mainly are made up of farad capacitor C39, C40 after the described power down, make the power supply time-delay.
3. The Design of Tax Controled Device according to claim 1 and 2 is characterized in that the tax information storer adopts ferroelectric memory.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620052505 CN200986728Y (en) | 2006-10-17 | 2006-10-17 | Tax Controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620052505 CN200986728Y (en) | 2006-10-17 | 2006-10-17 | Tax Controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200986728Y true CN200986728Y (en) | 2007-12-05 |
Family
ID=38916187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620052505 Expired - Fee Related CN200986728Y (en) | 2006-10-17 | 2006-10-17 | Tax Controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200986728Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103544786A (en) * | 2012-07-11 | 2014-01-29 | 北京旋极信息技术股份有限公司 | Tax control disc |
| CN110111512A (en) * | 2019-04-26 | 2019-08-09 | 北京旋极百旺科技有限公司 | For the simple tax control tray of middle-size and small-size enterprise of paying taxes, tax control machine and simple tax control disk control method |
-
2006
- 2006-10-17 CN CN 200620052505 patent/CN200986728Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103544786A (en) * | 2012-07-11 | 2014-01-29 | 北京旋极信息技术股份有限公司 | Tax control disc |
| CN103544786B (en) * | 2012-07-11 | 2016-01-20 | 北京旋极信息技术股份有限公司 | Tax control tray |
| CN110111512A (en) * | 2019-04-26 | 2019-08-09 | 北京旋极百旺科技有限公司 | For the simple tax control tray of middle-size and small-size enterprise of paying taxes, tax control machine and simple tax control disk control method |
| CN110111512B (en) * | 2019-04-26 | 2022-08-02 | 北京旋极百旺科技有限公司 | Simple tax control disk for small and medium-sized tax enterprises, tax control machine and control method of simple tax control disk |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071205 Termination date: 20141017 |
|
| EXPY | Termination of patent right or utility model |