CN1230729A - Personal digital assistant system capable of backing up data into nonvolatile memory - Google Patents
Personal digital assistant system capable of backing up data into nonvolatile memory Download PDFInfo
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- CN1230729A CN1230729A CN 98105192 CN98105192A CN1230729A CN 1230729 A CN1230729 A CN 1230729A CN 98105192 CN98105192 CN 98105192 CN 98105192 A CN98105192 A CN 98105192A CN 1230729 A CN1230729 A CN 1230729A
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Abstract
The personal digital assistant system can be used directly to input and store the user's data and maintain them after power off. It includes: ROM to store data judging formula; nonvolatile memory to store user's data and maintain them after power off; RAM to store user's data which disappear after power off; CPU to process user's data and fudges whether or not the data in nonvolatile memory are the same as those in RAM based on data judging formula; and display.
Description
The present invention is the device of automatically backup data (data) in relevant a kind of PDA(Personal Digital Assistant), and in particularly relevant a kind of PDA(Personal Digital Assistant), automated back-up is in the device of non-volatile memory unit.
In general personal digital assistant (Personal Digital Assistant:PDA), when system receives the information (information) that the user imported, be with received information, generally speaking be personal data, be stored in the storer of system.And total system operates needed system program is when dispatching from the factory, burning is in PDA(Personal Digital Assistant), non-volatile (non-volatile) storer, to avoid system program to suffer any destruction or change, also can avoid when system power supply is interrupted, causing the disappearance of system program.This is because the information of remembering in non-volatility memorizer can only write once, just can't change later again.And personal data are input to after the PDA system, are to be stored in volatile storage, for example static RAM (Static Random Access Memory:SRAM).
In general personal digital assistant (the Personal Digital Assistant:PDA) system, its structure as shown in Figure 1.The shade read only memory (mask Read Only Memory::mask ROM) the 100th wherein is used for stocking system software, and some are fixed and the data that can not change.When the user imports data by the outside by user's inputting interface 101, will read the stored system software of the shade read only memory 100 by CPU (central processing unit) (Central Processing Unit:CPU) 103, to handle by the data of using inputting interface 101 inputs.
Wherein importing the input signal 102 of user's inputting interface 101 is imported by the user.When using the data of original user's storage then if necessary,, and handle it just by reading of data among static RAM (the Static RandomAccess Memory:SRAM) 106.If, then directly handle the information that the user is imported by user interface 101 as long as when handling by information that the user imported.Then with resulting information storage at static RAM (Static Random Access Memory:SRAM) 106.
Wherein employed power supply of static RAM and the used power supply of CPU (central processing unit), make things convenient for the user to carry because consider, so all be to use electrical storage device, it in Fig. 1 primary power 120, and static random is deposited storer 106 when employed primary power 120 power drain, power supply can switch to a standby power supply 130, and as keeping the required power supply of content that static RAM 106 is remembered, and this standby power supply 130 also is an electrical storage device.Then by CPU (central processing unit) 103 information to display is sent to display device 109 when wanting display message, by display device 109 information is shown to the user with the form of optics, display device 109 is LCD normally.
In the general PDA system, when being used for storing the data that some users import, all be to use volatile storage, for example static RAM (Static Random Access Memory:SRAM) or dynamic RAM (Dynamic Random Access Memory:DRAM).Store the data to this type of volatility (Volatile) storer, cooperate with standby power supply, when system power supply was exhausted, the data that are stored in the storer still can be kept a period of time.As long as within during this period of time, the user has changed a new power supply in this system the time, and stored data just can continue storage in the volatile storage.
Because not only trend is light, thin, short, little day by day for electronic product, and the operation of electronics and IT products should be simple more, can reduces user's operation more and can keep System Operation person for best.So PDA system also is the design of adopting the portability type, also therefore power supply becomes the problem that must be noted.Wherein being used to provide total system to operate needed power supply all is portable power such as battery etc., because the electric energy that these power supplys are accumulated all is limited, once the used main power supply of system exhausts, though still have and have power supply stored personal data can not disappear in the storer to keep, but when this standby power supply also exhausts, personal data stored in the storer will disappear, so can cause user's puzzlement.
Another kind of situation is to take place when some situations, when for example system power supply is unstable, can make PDA system work as machine, and also the data that may therefore cause system stores to calculate in the body in volatility are eliminated, so also can cause the puzzlement of system.
In above-mentioned background of invention, after the used main power supply of traditional personal digital assistant (Personal Digital Assistant:PDA) system exhausts, though still have and have power supply stored data can not disappear in the storer to keep, but when this standby power supply also exhausts, be used for storing the problem that the database of personal data disappears in the storer.Also in order to solve when primary power instability or other reasons cause system to work as machine the problem that the stored data of the volatile storage of system can make a mistake.So the invention provides non-volatile (non-volatile) storer, and copy package contains the database of personal data to this non-volatility memorizer (non-volatile) flash memory (flash Random Access Memory:flash RAM) automatically, set up a backed up data storehouse, when avoiding power supply and standby power supply all to exhaust, the loss of stored personal data.
User's information can directly be imported and store to a kind of personal digital assistant provided by the present invention (Personal Digital Assistant:PDA) device, and when power supply disappeared, this user's information still existed.This device comprises following elements:
Whether only the reading memory device is used for the store information determining program, correct to check user's information of being stored up.Flash memory is used to store user's information, and when power supply disappeared, user's information still existed.The random access memory device is used to store user's information, and when power supply disappeared, stored data can disappear in the random access memory device.CPU (central processing unit) is used to handle this user's information, and with the information determining program judge be stored in the fast storer be stored in the random access memory device in user's information whether identical.Display device, the signal that is used for being sent to display device is presented at this display device surface with the form of luminous energy.
Fig. 1 is the functional block diagram of traditional PDA system.
Fig. 2 is the functional block diagram of PDA system of the present invention.
Fig. 3 is in the PDA system of the present invention, be used for being stored in the non-volatile pen recorder be stored in the random access memory device in the process block diagram of the whether identical information determining program of user's information.
For after overcoming the used main power supply of traditional personal digital assistant (Personal Digital Assistant:PDA) system and exhausting, though still have and have power supply stored personal data can not disappear in the storer to keep, but when this standby power supply also exhausts, be used for storing the problem that the database of personal data disappears in the storer.So the invention provides non-volatile (non-volatile) storer, and copy package contains the database of personal data to this non-volatility memorizer (non-volatile) automatically, set up a backed up data storehouse, when avoiding power supply and standby power supply all to exhaust, the disappearance of stored personal data.
The system construction drawing of PDA system of the present invention as shown in Figure 2, its structure is roughly identical with traditional PDA system, different is to have had more non-volatile memory unit.In order to the data in the volatility memory storage are done a backup database in non-volatile memory unit,, when being arranged, power supply can repeat to read or write data again so that under power free situation, still can keep the interior data storehouse.And be the storage device that stores backup database with flash memory (flash Random Access Memory:flash RAM) as PDA system in the present embodiment.Because flash memory itself just has the characteristic of repeatable read write data, can be and lose the information of internal memory because of power interruption or disappearance, again because repeat to write or when erasing information, be just can carry out, so be particularly suitable for application of the present invention with other devices in the PDA system.
Personal digital assistant of the present invention (Personal Digital Assistant:PDA) system, its structure as shown in Figure 2.The shade read only memory (mask Read Only Memory:mask ROM) the 200th wherein is used for some data that can not change of stocking system software.When the user imports data by user's inputting interface 201, will handle the information that is obtained by CPU (central processing unit) (Central Processing Unit:CPU) 203.
Wherein importing the input signal 202 of user's inputting interface 20l is imported by the user.When using the data of original user's storage then if necessary, CPU (central processing unit) 203 is just deposited in the storer (Static Random Access Memory:SRAM) 206 by static random and is read the data that are stored in wherein.If as long as when handling by information that the user imported, then directly handle the information that is obtained, then with resulting information storage at static RAM (Static Random Access Memory:SRAM) 206, be stored in the non-volatile memory unit 204 according to the setting means of data backup.If then information to display is sent to display device 214 when wanting display message by CPU (central processing unit) 203, by display device 214 information is shown to the user with the form of optics, display device 214 can be used LCD (Liquid Crystal Display:LCD).Employed in the present invention power supply is that this primary power 220 is identical with the employed power supply of traditional PDA system, is a kind of portable power supply with primary power 220.
PDA system provided by the present invention can see through several modes when carrying out DB Backup, be in the present embodiment to set for the user in three kinds of modes.First kind of person of being to use manually sets, and second kind is regular automated back-up, and the third is a new database more at any time.First kind of mode is to see through user's inputting interface 201 by the user, and with the database that is stored in the static RAM 206, directly backup (backup) is to non-volatile memory unit 204.The method not at any time more new database run into the puzzlement that spends the more time, do not have the inconsistent problem of data that regular automated back-up runs into yet.
The second way person of being to use sets at set intervals, and system is just from the database of being about to be stored in the static RAM 206, and directly backup (back up) is to non-volatile memory unit 204.Its advantage is to avoid at any time more new database more time of cost on handling, and shortcoming is the database and the database in the static RAM 206 that causes easily in the non-volatility memorizer 204, different situations generation in a certain period.The third mode is a new database more at any time, and its mode is as among the above-mentioned embodiment, as long as CPU (central processing unit) will be stored into the data that are stored in the static RAM 206, just simultaneously with data storing in non-property memory storage 204.Its advantage is can be with up-to-date DB Backup in non-volatility memorizer 204, and shortcoming is that the time that is spent is more.
In PDA system of the present invention, when system's primary power 220 spread of voltages or other factors cause system to work as machine, in order to prevent that the record in the database made a mistake or damaged this moment, CPU (central processing unit) can be carried out the judgement of data correctness according to a data determining program, stores again if can carry out data when wrong.The general mistake that causes because system is unstable, big city occurs in the database in the static RAM 206, so will judge earlier that the data in the static RAM 206 have inerrancy, to avoid a wrong information, be stored in the non-volatile memory unit 204 by in the static RAM 206.
Above-mentioned data judge that formula is to be stored in the shade read only memory 200, and the process flow diagram of this program as shown in Figure 3.First step wherein is that step 298 " is set up database ", just the initialization system initial value.Then carry out next procedure one step 300 " CPU (central processing unit) is carried out system works ".So-called system works is meant the work that CPU (central processing unit) is carried out, for example the work such as data in the access static RAM.Then be to carry out step 302 " to judge whether to back up ", then get back to step 300 " CPU (central processing unit) is carried out system works ", and carry out the step after the step 300 if not will back up.If will back up, then carry out step 303 and " judge whether the data in the sram data storehouse are correct ", then carry out step 305 and " back up " if the result who judges is correct data, with the data in the backup sram data storehouse, and then carry out step 300 and subsequent step thereof.If the result who judges is not correct data then to carry out step 309 and " judge whether the data in the non-volatile memory unit database are correct ", whether be correct data with the data of further declaring in the non-volatile memory unit database.If the result that step 309 is judged is not correct data, then is that the step-step 312 of carrying out thereafter " rebulids database ", and then carries out step 300 and subsequent step thereof.If the result that step 309 is judged is correct data, then is that the step-315 of carrying out thereafter " is stored into static RAM again with the database in the non-volatile memory unit ", then carry out step 300 and subsequent step thereof.
In an embodiment of the present invention, judging whether stored data are identical, is that fixedly whether the content of address is identical to check some.The mode of judging stored data correctness has additive method, for example does the inspection of check sum value at the stored contents of on-fixed address.What present embodiment proposed is to be an embodiment, is not in order to limit the present invention.
Employed in the present invention non-volatile memory unit is with flash memory (flash RAM), but is not only to be defined in flash memory (flash RAM).But as long as employed storer is rewritable, and still can keep wherein information in power free situation, the flash memory (flash RAM) that replaces in the present embodiment with the storer with this character all should belong to the equivalence replacement, should belong under the spirit and scope of the present invention.
The above is only for the present invention's preferred embodiment, be not in order to limit the present invention's claim, everyly be familiar with this skill person and the present invention be applied in other portable personal data storage device, the personal digital assistant device that for example has calling set (pager) function, because it is to be easy to reach in known this operator that calling set is combined with personal digital assistant device, if, also be included within the spirit and scope of the present invention so the present invention is applied in the PDA system with calling set function; And all other do not break away from the equivalence finished under the disclosed spirit and change or modify, and all should be included in the following claim.
Claims (13)
1. personal digital assistant device, user's information can directly be imported and store to this personal digital assistant device, when its workspace was left in the output of one of this personal digital assistant device of supply power supply, this user's information still existed, and this personal digital assistant device comprises at least:
Only the reading memory device is to be used to store an information determining program, and this information determining program system is used for checking whether this stored user's information of this PDA system is correct;
Non-volatile memory unit is to be used to store this user's information, and when its workspace was left in the output of this power supply, this user's information still existed, and this first system program can be substituted;
The random access memory device is to be used to store this user's information, and this user's information is when its workspace is left in the output of this power supply, and stored data can disappear in this random access memory device;
Central processing unit, system is used to handle this user's information, and with this only this information in the reading memory device judge formula, judge this user's information that is stored in this non-volatile memory unit, whether identical with this user's information in being stored in this random access memory device; And
Display device is the signal that is used for being sent to this display device by this central processing unit is presented at this display device surface with the form of luminous energy.
2. device according to claim 1 is characterized in that, wherein above-mentioned only reading memory device is a read only memory.
3. device according to claim 1 is characterized in that, wherein above-mentioned non-volatile memory unit is a flash memory.
4. device according to claim 1 is characterized in that, wherein above-mentioned random access memory is a static RAM.
5. device according to claim 1 is characterized in that, wherein above-mentioned central processing unit is a CPU (central processing unit).
6. device according to claim 1 is characterized in that, wherein above-mentioned display device is a LCD.
7. device according to claim 1 is characterized in that, this performed information of wherein above-mentioned central processing unit is judged formula, comprises the following step at least:
Set up a database and central processing unit and carry out system works, judge that then then central processing unit is proceeded this PDA system work if do not back up this user's information to this non-volatile memory unit;
Judge that these user's data that this static state machine is deposited in the memory correctly then back up these user's data to this non-volatile memory unit, this central processing unit carries out this PDA system work then; And
Judge that this user's information in this non-volatile memory unit is correct, then this user's information in this non-volatile memory unit is stored in this static random-access memory storage again, this central processing unit carries out this PDA system work then, judge that this user's information in this non-volatile memory unit is incorrect, then rebulid this database.
8. personal digital assistant device, user's information can directly be imported and store to this personal digital assistant, when its workspace was left in the output of one of this personal digital assistant device of supply power supply, this user's information still existed, and this personal digital assistant device comprises at least:
Only the reading memory device is to be used to store an information to judge formula, and this information judges that formula system is used for checking whether this stored user's information of this PDA system is correct;
Flash memory is to be used to store this user's information, and when its workspace was left in the output of this power supply, this user's information still existed, and this first system program can be substituted;
Depositing memory storage at random, is to be used to store this user's information, and this user's information is when its workspace is left in the output of this power supply, and stored data can disappear in this random access memory device;
Central processing unit, system is used to handle this user's information, and with this only this information in the reading memory device judge formula, judge this user's information that is stored in this fast storer, whether identical with this user's information in being stored in this random access memory device; And
Display device is the signal that is used for being sent to this display device by this central processing unit is presented at this display device surface with the form of luminous energy.
9. as the device of claim 8, it is characterized in that wherein above-mentioned only reading memory device is a read only memory.
10. as the device as described in the claim 8, it is characterized in that wherein above-mentioned random access memory is a static RAM.
11. the device as described in the claim 8 is characterized in that wherein above-mentioned central processing unit is a CPU (central processing unit).
12. the device as described in the claim 8 is characterized in that wherein above-mentioned display device is a LCD.
13. the device as described in the claim 8 is characterized in that, these performed data of wherein above-mentioned central processing unit are judged formula, comprise the following step at least:
Set up a database and central processing unit and carry out system works, judge that then then central processing unit is proceeded this PDA system work if do not back up this user's information to this flash memory;
Judge that this user's information that this static random is deposited in the memory storage correctly then backs up this user's information to this flash memory, this central processing unit carries out this PDA system work then; And
Judge that this user's information in this flash memory is correct, then this user's information in this flash memory is stored in this static random-access memory storage again, this central processing unit carries out this PDA system work then, judge that this user's information in this flash memory is incorrect, then rebulid this database.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981051928A CN1331077C (en) | 1998-03-26 | 1998-03-26 | Personal digital assistant system capable of backing up data into nonvolatile memory |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB981051928A CN1331077C (en) | 1998-03-26 | 1998-03-26 | Personal digital assistant system capable of backing up data into nonvolatile memory |
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| Publication Number | Publication Date |
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| CN1230729A true CN1230729A (en) | 1999-10-06 |
| CN1331077C CN1331077C (en) | 2007-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB981051928A Expired - Fee Related CN1331077C (en) | 1998-03-26 | 1998-03-26 | Personal digital assistant system capable of backing up data into nonvolatile memory |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401261C (en) * | 2005-05-24 | 2008-07-09 | 乐金电子（昆山）电脑有限公司 | Data saving method of personal information terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60163597A (en) * | 1984-02-06 | 1985-08-26 | Hitachi Ltd | Memory backup device of electronic exchange |
| JPH08139798A (en) * | 1994-11-10 | 1996-05-31 | Sony Corp | Expanding method for electronic telephone directory |
| JPH08147222A (en) * | 1994-11-16 | 1996-06-07 | Oki Electric Ind Co Ltd | Backup system for personal information managing device |
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1998
- 1998-03-26 CN CNB981051928A patent/CN1331077C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401261C (en) * | 2005-05-24 | 2008-07-09 | 乐金电子（昆山）电脑有限公司 | Data saving method of personal information terminal |
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| CN1331077C (en) | 2007-08-08 |
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Granted publication date: 20070808 Termination date: 20140326 |