CN104077547A - Data power down protection circuit for electronic device - Google Patents
Data power down protection circuit for electronic device Download PDFInfo
- Publication number
- CN104077547A CN104077547A CN201410286839.6A CN201410286839A CN104077547A CN 104077547 A CN104077547 A CN 104077547A CN 201410286839 A CN201410286839 A CN 201410286839A CN 104077547 A CN104077547 A CN 104077547A
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- data
- battery
- circuit
- chip microcomputer
- protection circuit
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/81—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer by operating on the power supply, e.g. enabling or disabling power-on, sleep or resume operations
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
- G06F21/79—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in semiconductor storage media, e.g. directly-addressable memories
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Power Sources (AREA)
Abstract
The invention provides a data power down protection circuit for an electronic device. The data power down protection circuit for the electronic device comprises a single chip microcomputer, a flash memorizer, a power control module, a rechargeable battery, a device power supply and a replaceable battery; the single chip microcomputer is connected with the flash memorizer to control read-write and erasure operations; the single chip microcomputer is also connected with the power control module to achieve control of the power supply control module; the rechargeable battery, the device power supply and the replaceable battery are connected with the power control module; the power control module is connected with the single chip microcomputer and the flash memorizer to supply power; when the device operates, power is supplied by the device power supply, power of a main battery is supplies by the replaceable battery when the device is shut down and power is supplied through the rechargeable battery when the replaceable battery cannot be used. The data power down protection circuit for the electronic device has the advantages of prolonging the service of the rechargeable battery and automatically destroying data when the battery is low in voltage due to the double-battery protection mechanism and the strict battery monitoring mechanism and enabling a plurality of practical functions to be added.
Description
Technical field
The present invention relates to data protection field, especially relate to a kind of data cut-off protection circuit of electronic equipment.
Background technology
At present, data cut-off protection is mainly by two kinds of modes, a kind of mode is the mode that adopts powered battery SRAM, which data destroying speed is fast, the shortcoming existing is that secure storage areas capacity little (being generally no more than 1 megabyte), power consumption are large, easily causes battery power consumption that the faults such as leakage occur to the greatest extent afterwards; Another kind of mode is the mode that adopts internal cell power supply low-power scm and FLASH, and which capacity is large, and power consumption is little, but after existing battery electric quantity low in general scheme, cannot destroy the serious potential safety hazard of data.
In addition, all adopted a battery that is placed in device interior in conventional data power down protection module, battery, after Reusability, easily breaks down in the past, is difficult for changing after breaking down, and needs depot repair, has increased after cost.
Summary of the invention
The object of the invention is to: the problem existing for prior art; a kind of data cut-off protection circuit of electronic equipment is provided; to reduce battery failures; eliminate the potential safety hazard that data that monocell causes can not be destroyed simultaneously; in addition, some functions have also been increased to solve the problem of traditional protection mode function singleness.
Goal of the invention of the present invention is achieved through the following technical solutions:
A kind of data cut-off protection circuit of electronic equipment, it is characterized in that, this circuit comprises single-chip microcomputer, flash storer, energy supply control module, rechargeable battery, device power supply (DPS) and replaceable battery, described single-chip microcomputer is connected with flash storer, control its read-write and erase operation, this single-chip microcomputer is also connected with energy supply control module, realizes the control to energy supply control module; Described rechargeable battery, device power supply (DPS) and replaceable battery are all connected with energy supply control module, this energy supply control module is connected power supply with single-chip microcomputer, flash storer respectively, when working, equipment adopts device power supply (DPS) power supply, during equipment shutdown, adopting replaceable battery is main battery power supply, adopts rechargeable battery powered when replaceable battery is unavailable.
Preferably, this circuit also comprises that charged battery voltage monitors module and data destroying trigger module, monitoring voltage module monitors electric quantity of rechargeable battery in real time, when voltage is low, send a signal to data destroying trigger module, data destroying trigger module generates to be destroyed signal and sends to single-chip microcomputer, and Single-chip Controlling flash storer is destroyed data.
Preferably, this circuit also comprises data destroying trigger switch, and this data destroying trigger switch is connected with data destroying trigger module.
Preferably, this circuit also comprises replaceable battery monitoring voltage module and IO interface, and when replaceable battery voltage is low, monitoring voltage module sends by IO interface the cue that cell voltage is low.
Preferably, this circuit also comprises panalarm, and this panalarm is connected with IO interface, for sending warning.
Preferably, described replaceable battery can be changed in device external.
Preferably, this circuit also comprises charging circuit, and this charging circuit is connected with rechargeable battery.
Preferably, this circuit also comprises RTC real-time clock, and this RTC real-time clock is connected with single-chip microcomputer, and energy supply control module is often opened power supply to RTC real-time clock.
Preferably, this circuit also comprises that reading and writing data order is destroyed and reads log interface, by this interface, reads single-chip microcomputer internal record.
Compared with prior art, the present invention has the following advantages:
1, the present invention adopts low-power scm and FLASH scheme, and memory block capacity can reach 32 megabyte, supports repeatedly to wipe, guarantee that data can not be resumed, and whole circuit is consumes power not under normal circumstances, and leakage current is less than 2.5uA, has solved the large technical barrier of power consumption;
2, the present invention adopts double cell protection mechanism, and main battery is the battery that can change by outside, when battery electric quantity deficiency or fault, can directly be changed by user; Internal cell, because of consumes power not, has improved battery life and reliability greatly, and the realization of above measure, can obviously reduce the depot repair situation that equipment causes because of battery problems;
3, the present invention carries out monitoring voltage to double cell, when the low alarm prompting of main battery voltage, changes battery, and when backup power source voltage is low, auto-destruct data, have improved device security;
4, the present invention is provided with reading and writing data order destruction and reads log interface, and fetch equipment is started shooting, shut down, opens the timely interocclusal records of bottom operation such as shell, data destroying at any time, and the equipment key operation of realization can be reviewed;
5, the present invention is provided with data destroying trigger switch, can support out shell to destroy data, and manually button is destroyed data, and data are destroyed in order;
6, the present invention is provided with RTC real-time clock, and real-time clock can be externally provided.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present invention.
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Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
embodiment
Referring to as shown in Figure 1, the data cut-off protection circuit of a kind of electronic equipment of the present invention, this circuit comprises single-chip microcomputer 1, flash storer 2, energy supply control module 3, rechargeable battery 4, device power supply (DPS) 14 and replaceable battery 9.Single-chip microcomputer 1 is connected with flash storer 2, controls its read-write and erase operation, and this single-chip microcomputer 1 is also connected with energy supply control module 3, realizes the control to energy supply control module 3.Rechargeable battery 4, device power supply (DPS) 14 and replaceable battery 9 are all connected with energy supply control module 3, this energy supply control module 3 is connected power supply with single-chip microcomputer 1, flash storer 2 respectively, when working, equipment adopt device power supply (DPS) 14 to power to aforementioned components, during equipment shutdown, adopt replaceable battery 9 to power to aforementioned components for main battery, replaceable battery 9 adopts rechargeable battery 4 to power to aforementioned components when unavailable.Owing to adopting double cell protection mechanism, main battery is the battery that can change by outside, when battery electric quantity deficiency or fault, can directly be changed by user; Internal cell, because of consumes power not, has improved battery life and reliability greatly, and the realization of above measure, can obviously reduce the depot repair situation that equipment causes because of battery problems.
For energy auto-destruct data when backup power source voltage is low, improve device security, this circuit also comprises that charged battery voltage monitors module 5 and data destroying trigger module 6, monitoring voltage module 5 monitors rechargeable battery 4 electric weight in real time, when voltage is low, send a signal to data destroying trigger module 6, data destroying trigger module 6 generates to be destroyed signal and sends to single-chip microcomputer 1, and single-chip microcomputer 1 is controlled flash storer 2 and destroyed data.
In addition, circuit of the present invention can also arrange data destroying trigger switch 8, and this data destroying trigger switch 8 is connected with data destroying trigger module 6, thereby invention circuit is had, can support out shell to destroy data, manually button is destroyed data, and the function of data is destroyed in order.
For convenient, when the low alarm of main battery voltage, point out and change battery, replaceable battery monitoring voltage module 10 is also set circuit of the present invention and IO interface 11(is the low indication interface of voltage), when replaceable battery 9 voltages are when low, monitoring voltage module 10 sends by IO interface 11 cue that cell voltage is low.For integrated and miniaturization, circuit of the present invention can also the integrated panalarm that arranges, and this panalarm is connected with IO interface 11, for sending warning.And replaceable battery can be changed in device external.
Circuit of the present invention also can integratedly arrange charging circuit 7, and this charging circuit 7 is connected with rechargeable battery 4, conveniently charges.
Circuit of the present invention also can arrange reading and writing data order destruction and read log interface 13, by this interface, can read single-chip microcomputer 1 internal record, comprises device power-up, shuts down, opens the bottom operations such as shell, data destroying.
The present invention also can arrange RTC real-time clock 12, this RTC real-time clock 12 is connected with single-chip microcomputer 1, energy supply control module 3 often opens power supply to RTC real-time clock 12, destroys when reading log interface 13 and reading bottom operation like this by reading and writing data order, can also know the time interocclusal record of these bottom operations.
Describe lower signal relation of the present invention and disposal route below in detail:
The interface of the input and output of circuit of the present invention has data destroying trigger pip interface, SPI interface and the indication interface of reporting to the police.Wherein, data destroying trigger pip interface mainly receives by data destroying trigger switch and sends input signal, containing manually destroying, start shooting the destroy command inputs such as case auto-destruct; SPI interface (being that log interface is read in reading and writing data order destruction), for service interface is externally provided, supports that host side is carried out the read-write of protected data, order is destroyed and the fetch interface of bottom daily record.
The processing core of circuit of the present invention is low-power scm, and operation independent embedded software is realized the read-write of FLASH and erase operation, real-time clock operation, destroyed the functions such as operation, equipment operating log recording, power supply control.
Power unit circuit is comprised of energy supply control module, rechargeable battery and charging circuit, replaceable battery, monitoring voltage module.During equipment work, adopt device power supply (DPS); During equipment shutdown, replaceable battery is main battery, and this main battery can be changed in device external, and is equipped with monitoring voltage module, when replaceable battery voltage is low, low by IO interface prompting replaceable battery voltage; Rechargeable battery is reserve battery, prevent in equipment shutdown situation, replaceable battery uses up or cannot be destroyed for data after extracting by people at electric weight, this rechargeable battery is equipped with monitoring voltage module, when cell voltage is low, automatically triggers and destroys data, and rechargeable battery charges by charging circuit.Energy supply control module builds by voltage comparator and discrete device, realizes selection and the automatic switchover of battery, signal enabling conducting or disconnection that energy supply control module provides by data destroying trigger module and single-chip microcomputer.The power supply of RTC real-time clock is normally open.
Data destroying trigger module is built by discrete device, realizes the processing of destruction signals at different levels and the control of power turn-on and cut-out.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, it should be pointed out that all any modifications of doing within the spirit and principles in the present invention, be equal to replacement and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the data cut-off protection circuit of an electronic equipment, it is characterized in that, this circuit comprises single-chip microcomputer, flash storer, energy supply control module, rechargeable battery, device power supply (DPS) and replaceable battery, described single-chip microcomputer is connected with flash storer, control its read-write and erase operation, this single-chip microcomputer is also connected with energy supply control module, realizes the control to energy supply control module; Described rechargeable battery, device power supply (DPS) and replaceable battery are all connected with energy supply control module, this energy supply control module is connected power supply with single-chip microcomputer, flash storer respectively, when working, equipment adopts device power supply (DPS) power supply, during equipment shutdown, adopting replaceable battery is main battery power supply, adopts rechargeable battery powered when replaceable battery is unavailable.
2. the data cut-off protection circuit of a kind of electronic equipment according to claim 1; it is characterized in that; this circuit also comprises that charged battery voltage monitors module and data destroying trigger module; monitoring voltage module monitors electric quantity of rechargeable battery in real time; when voltage is low; send a signal to data destroying trigger module, data destroying trigger module generates to be destroyed signal and sends to single-chip microcomputer, and Single-chip Controlling flash storer is destroyed data.
3. the data cut-off protection circuit of a kind of electronic equipment according to claim 2, is characterized in that, this circuit also comprises data destroying trigger switch, and this data destroying trigger switch is connected with data destroying trigger module.
4. the data cut-off protection circuit of a kind of electronic equipment according to claim 1; it is characterized in that; this circuit also comprises replaceable battery monitoring voltage module and IO interface, and when replaceable battery voltage is low, monitoring voltage module sends by IO interface the cue that cell voltage is low.
5. the data cut-off protection circuit of a kind of electronic equipment according to claim 4, is characterized in that, this circuit also comprises panalarm, and this panalarm is connected with IO interface, for sending warning.
6. the data cut-off protection circuit of a kind of electronic equipment according to claim 1, is characterized in that, described replaceable battery can be changed in device external.
7. the data cut-off protection circuit of a kind of electronic equipment according to claim 1, is characterized in that, this circuit also comprises charging circuit, and this charging circuit is connected with rechargeable battery.
8. the data cut-off protection circuit of a kind of electronic equipment according to claim 1, is characterized in that, this circuit also comprises RTC real-time clock, and this RTC real-time clock is connected with single-chip microcomputer, and energy supply control module is often opened power supply to RTC real-time clock.
9. the data cut-off protection circuit of a kind of electronic equipment according to claim 1, is characterized in that, this circuit also comprises that reading and writing data order is destroyed and reads log interface, by this interface, reads single-chip microcomputer internal record.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410286839.6A CN104077547A (en) | 2014-06-25 | 2014-06-25 | Data power down protection circuit for electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410286839.6A CN104077547A (en) | 2014-06-25 | 2014-06-25 | Data power down protection circuit for electronic device |
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| Publication Number | Publication Date |
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| CN104077547A true CN104077547A (en) | 2014-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410286839.6A Pending CN104077547A (en) | 2014-06-25 | 2014-06-25 | Data power down protection circuit for electronic device |
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| CN (1) | CN104077547A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106778373A (en) * | 2017-01-10 | 2017-05-31 | 浙江大学 | Data storage device, data protection system and its application method |
| CN110909395A (en) * | 2018-09-14 | 2020-03-24 | 武汉海康存储技术有限公司 | Method and device for destroying data of nonvolatile storage device |
| CN112446058A (en) * | 2020-12-16 | 2021-03-05 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Data safety protection device |
| CN113255017A (en) * | 2021-05-28 | 2021-08-13 | 湖南胜云光电科技有限公司 | Self-destruction protection device and computer |
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2014
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Patent Citations (6)
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| JP2000181698A (en) * | 1998-12-17 | 2000-06-30 | Mitsubishi Electric Corp | Control program rewriting system |
| CN1462922A (en) * | 2003-06-19 | 2003-12-24 | 上海北大方正科技电脑系统有限公司 | Power supply management system for palm equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106778373A (en) * | 2017-01-10 | 2017-05-31 | 浙江大学 | Data storage device, data protection system and its application method |
| CN110909395A (en) * | 2018-09-14 | 2020-03-24 | 武汉海康存储技术有限公司 | Method and device for destroying data of nonvolatile storage device |
| CN110909395B (en) * | 2018-09-14 | 2022-02-08 | 杭州海康存储科技有限公司 | Method and device for destroying data of nonvolatile storage device |
| CN112446058A (en) * | 2020-12-16 | 2021-03-05 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Data safety protection device |
| CN112446058B (en) * | 2020-12-16 | 2022-04-29 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Data safety protection device |
| CN113255017A (en) * | 2021-05-28 | 2021-08-13 | 湖南胜云光电科技有限公司 | Self-destruction protection device and computer |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20141001 |