CN101051284A - Secure digital storage device and associated controller - Google Patents
Secure digital storage device and associated controller Download PDFInfo
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- CN101051284A CN101051284A CN 200610073257 CN200610073257A CN101051284A CN 101051284 A CN101051284 A CN 101051284A CN 200610073257 CN200610073257 CN 200610073257 CN 200610073257 A CN200610073257 A CN 200610073257A CN 101051284 A CN101051284 A CN 101051284A
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Abstract
The invention provides a Secure Digital (SD) storage device. The secure digital storage device comprises a first storage chip and a second storage chip, and a controller coupled to the first storage chip and the second storage chip and operating in an automatic backup mode of the secure digital storage device. In the automatic backup mode, the controller plans the storage space of the first storage chip as a main storage area and plans the storage space of the second storage chip as a backup storage area. In the automatic backup mode, when the secure digital storage device receives a data write, the controller writes the data in the primary storage area and writes a backup of the data in the backup storage area.
Description
Technical field
The present invention relates to a memory storage, particularly relate to a safety digital storage device with automatic backup function.
Background technology
Safety digital storage device can be widely used in various portable electron devices, and for example PDA(Personal Digital Assistant), digital camera and multimedia player etc. are as the usefulness of data storing.Because it is little, easy to carry and be convenient to substitute with in the different systems and the characteristics such as swapping data of device to have volume.
Fig. 1 is the calcspar of a traditional safety digital storage device.Safety digital storage device 10 comprises controller 11, storage chip 12 and 13, and one switches switch 14.This controller 11 is connected to storage chip 12 and 13.The reader device (not shown) that safety digital storage device 10 is connected can identify the summation that storage volume that safety digital storage device 10 has is the storage volume that has respectively of storage chip 12 and 13.This reader device then can be according to need, and addressing writes data to safety digital storage device 10, by controller 11 with data according to addressing distribute write to storage chip 12 or 13 in.Change-over switch 14 is a read-only function change-over switch and a primary importance is arranged and a second place.This reader device can be discerned the position of this change-over switch 14, when change-over switch 14 during in a primary importance, and the normal access safety digital storage device 10 of reader device; When change-over switch 14 during in a second place, the reader device restriction writes the data of safety digital storage device 10, and only allows the data read operation to safety digital storage device 10.
Because safety digital storage device is used widely, how wherein stored data is made better protection,, the infringement of environment do not lose because causing the accident damage of storage chip, just become the main points that must be noted that.
Summary of the invention
The invention provides a safety digital storage device.This safety digital storage device comprises one first storage chip and one second storage chip, and a controller couples this first storage chip and this second storage chip and operates in an automated back-up pattern of this safety digital storage device.Wherein when this automated back-up pattern, this controller is planned to a main memory block with the storage space of this first storage chip, and the storage space of this second storage chip is planned to a back-up storage district.In this automated back-up pattern, to write fashionablely when this safety digital storage device receives data, this controller writes these data and writes a backup of these data in this back-up storage district in this main memory block.
The present invention further provides a controller, one first storage chip and one second storage chip that it is installed on a safety digital storage device and is coupled to this safety digital storage device; This controller comprises a register; Wherein when this register stored one first setting value, this controller was planned to a main memory block with the storage space of this first storage chip, and the storage space of this second storage chip is planned to a back-up storage district; Wherein write fashionablely when this controller receiving data, this controller writes these data and writes a backup of these data in this back-up storage district in this main memory block.
Description of drawings
The present invention will be than being easier to overall understanding by the diagram of the attached detailed description in back, and it only is graphic usefulness but not the present invention is limited to the diagram scope.
Fig. 1 is the calcspar of a traditional safety digital storage device.
Fig. 2 A is the calcspar of a safety digital storage device according to an embodiment of the invention.
Fig. 2 B is the synoptic diagram of a mode standard of the configuration of the changeable passbacks system of the safety digital storage device 20 among Fig. 2 A.
The reference numeral explanation
11,21～controller;
12,13,22,23～storage chip;
14,24,25～change-over switch.
Embodiment
Fig. 2 A is the calcspar of a safety digital storage device according to an embodiment of the invention.Safety digital storage device 20 comprises controller 21, storage chip 22 and 23, and change-over switch 24 and 25.This controller 21 is connected to storage chip 22 and 23.
Safety digital storage device 20 has an automated back-up pattern.When operating in this automated back-up pattern, this controller 21 is planned to a main memory block with the storage space of storage chip 22, and the storage space of storage chip 23 is planned to a back-up storage district.This main memory block equates with the memory capacity in this back-up storage district, uses that the back-up storage district can be stored and the identical data in main memory block.Therefore, the main memory block that can plan and the memory capacity in this back-up storage district are less value in storage chip 22 and 23 fens other memory capacity.Can use the storage chip 22 and 23 of same capability in the design, avoid the waste of storage space.
When this safety digital storage device 20 during in this automated back-up pattern, the reader device (not shown) that safety digital storage device 20 connected can identify storage volume that safety digital storage device 20 the has storage volume for this main memory block.This reader device then can be according to need, and addressing writes data to safety digital storage device 20, by controller 21 data distributed according to addressing to write in the main memory block of storage chip 22.Controller 21 writes to identical data position corresponding in the back-up storage district of storage chip 23 then, has promptly stored a Backup Data.
Change-over switch 24 is a read-only function change-over switch and a primary importance is arranged and a second place.This reader device can be discerned the position of this change-over switch 24, when change-over switch 24 during in a primary importance, and the normal access safety digital storage device 20 of reader device; When change-over switch 24 during in a second place, the reader device restriction writes the data of safety digital storage device 20, and only allows the data read operation to safety digital storage device 20.
In this example, further utilize change-over switch 25 and characteristic thereof, do one and switch operation, allow the user can select to read the data in this main memory block or this back-up storage district easily.Can be provided with one in the change-over switch 25 and switch the testing circuit (not shown), detect the position of this change-over switch; When change-over switch 25 during in primary importance, it is invalid that this change detection circuit makes this switching signal; When change-over switch 25 during in the second place, this change detection circuit makes this switching signal for effectively.If this switching signal is invalid and this safety digital storage device 20 response datas when reading, this controller 21 reads the data of this main memory block to respond this data read operation; If when this switching signal read for effective and these safety digital storage device 20 response datas, this controller 21 read the data in this back-up storage district to respond this data read operation.
In the present embodiment, safety digital storage device 20 can cooperate the function of traditional reader device fully, in change-over switch 24 during, accept data and write the data of depositing in this main memory block and this back-up storage district simultaneously and when data read, responding this main memory block in this primary importance.Change-over switch 24 is when this second place, and the reader device restriction writes the data of safety digital storage device 20, and only allows the data read operation to safety digital storage device 20, and responds the data in this back-up storage district when data read.
Use embodiments of the invention; the wherein stored data of safety digital storage device have better protection; same data storing is in different storage chips; if wherein a storage chip also can be read the data that are stored in another chip same position because the infringement of environment causes unexpected damage.
Fig. 2 B is the synoptic diagram of a mode standard of the configuration of the changeable passbacks system of the safety digital storage device 20 among Fig. 2 A.During this mode standard, safety digital storage device 20 can obtain bigger memory space, utilizes storage chip 22 and 23 to store different data respectively.When this mode standard, this controller 21 is planned to a standard storage district with the storage space merging of this storage chip 22 and 23.It is one program control that this controller 21 can receive, and switching operation modes is this mode standard or this automated back-up pattern.
This controller 21 also can comprise a register (not shown) and write different setting values and work in this mode standard or this automated back-up pattern to set it for this program.Controller 21 is carried out the different operating of this mode standard or this automated back-up pattern then according to different setting values.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; those skilled in the art can do some changes and retouching under the premise without departing from the spirit and scope of the present invention, so protection scope of the present invention is as the criterion with claim of the present invention.
Claims (10)
1. a safety digital storage device comprises:
One first storage chip and one second storage chip;
One controller couples this first storage chip and this second storage chip and operates in an automated back-up pattern of this safety digital storage device; Wherein
When this automated back-up pattern, this controller is planned to a main memory block with the storage space of this first storage chip, and the storage space of this second storage chip is planned to a back-up storage district; Wherein write fashionablely when this safety digital storage device receives data, this controller writes these data and writes a backup of these data in this back-up storage district in this main memory block.
2. safety digital storage device as claimed in claim 1 further operates in a mode standard; When this mode standard, this controller is planned to a standard storage district with the storage space merging of this first storage chip and this second storage chip.
3. safety digital storage device as claimed in claim 2, wherein this controller receives one program controlly, and switching operation modes is this mode standard or this automated back-up pattern.
4. safety digital storage device as claimed in claim 1, wherein this controller further is coupled to a switching signal; When this automated back-up pattern:
If this switching signal is invalid and this safety digital storage device response data when reading, this controller reads the data of this main memory block to respond this data read operation;
If when this switching signal read for effective and this safety digital storage device response data, this controller read the data in this back-up storage district to respond this data read operation.
5. safety digital storage device as claimed in claim 4 further comprises:
One switches switch, and it has a primary importance and a second place; And
One switches testing circuit, detects the position of this change-over switch; When this change-over switch during in primary importance, it is invalid that this change detection circuit makes this switching signal; When this change-over switch during in the second place, this change detection circuit makes this switching signal for effectively.
6. a controller, one first storage chip and one second storage chip that it is installed on a safety digital storage device and is coupled to this safety digital storage device; This controller comprises a register; Wherein
When this register stored one first setting value, this controller was planned to a main memory block with the storage space of this first storage chip, and the storage space of this second storage chip is planned to a back-up storage district; Wherein write fashionablely when this controller receiving data, this controller writes these data and writes a backup of these data in this back-up storage district in this main memory block.
7. controller as claimed in claim 6 further when storing one second setting value when this register, merges the storage space of this first storage chip and this second storage chip and is planned to a standard storage district.
8. controller as claimed in claim 7, wherein this controller receives one program controlly, and the setting value that changes this register is this first setting value or this second setting value.
9. controller as claimed in claim 6, wherein this controller further is coupled to a switching signal; Wherein when this register stores this first setting value:
If this switching signal is invalid and this controller response data when reading, this controller reads the data of this main memory block to respond this data read operation;
If when this switching signal read for effective and this controller response data, this controller read the data in this back-up storage district to respond this data read operation.
10. controller as claimed in claim 9 further comprises:
One switches the switching switch that testing circuit is coupled to this safety digital storage device, and this change-over switch has a primary importance and a second place; When this change-over switch during in primary importance, it is invalid that this change detection circuit makes this switching signal; When this change-over switch during in the second place, this change detection circuit makes this switching signal for effectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610073257 CN101051284A (en) | 2006-04-06 | 2006-04-06 | Secure digital storage device and associated controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610073257 CN101051284A (en) | 2006-04-06 | 2006-04-06 | Secure digital storage device and associated controller |
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| CN101051284A true CN101051284A (en) | 2007-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610073257 Pending CN101051284A (en) | 2006-04-06 | 2006-04-06 | Secure digital storage device and associated controller |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102567135A (en) * | 2010-12-13 | 2012-07-11 | 联想(北京)有限公司 | Refreshing/recovering method and electronic equipment |
| US8281095B2 (en) | 2009-03-13 | 2012-10-02 | Prolific Technology Inc. | Data storage system and backup method thereof |
| CN103136486A (en) * | 2013-01-25 | 2013-06-05 | 隋国利 | Secure digital (SD) memory card with switchable chips and control method |
| CN103150271A (en) * | 2013-03-09 | 2013-06-12 | 隋国利 | SD comprising hidden storage chip and control method thereof |
| CN103914360A (en) * | 2013-01-05 | 2014-07-09 | 联想(北京)有限公司 | Electronic device and data backup restoring method |
| CN107422988A (en) * | 2017-07-01 | 2017-12-01 | 重庆长安汽车股份有限公司 | Vehicle mounted guidance and multimedia player memory space compatibility method and vehicle-mounted product |
| CN109410869A (en) * | 2018-12-11 | 2019-03-01 | 惠科股份有限公司 | A kind of read method of data, reading device and display device |
| CN109410870A (en) * | 2018-12-11 | 2019-03-01 | 惠科股份有限公司 | Sequential control circuit, method for reading data and display device |
| CN109521960A (en) * | 2018-11-02 | 2019-03-26 | 格力电器（合肥）有限公司 | Data read-write method, device and system |
-
2006
- 2006-04-06 CN CN 200610073257 patent/CN101051284A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8281095B2 (en) | 2009-03-13 | 2012-10-02 | Prolific Technology Inc. | Data storage system and backup method thereof |
| CN102567135A (en) * | 2010-12-13 | 2012-07-11 | 联想(北京)有限公司 | Refreshing/recovering method and electronic equipment |
| CN102567135B (en) * | 2010-12-13 | 2015-04-29 | 联想(北京)有限公司 | Refreshing/recovering method and electronic equipment |
| CN103914360A (en) * | 2013-01-05 | 2014-07-09 | 联想(北京)有限公司 | Electronic device and data backup restoring method |
| CN103136486A (en) * | 2013-01-25 | 2013-06-05 | 隋国利 | Secure digital (SD) memory card with switchable chips and control method |
| CN103150271A (en) * | 2013-03-09 | 2013-06-12 | 隋国利 | SD comprising hidden storage chip and control method thereof |
| CN107422988A (en) * | 2017-07-01 | 2017-12-01 | 重庆长安汽车股份有限公司 | Vehicle mounted guidance and multimedia player memory space compatibility method and vehicle-mounted product |
| CN109521960A (en) * | 2018-11-02 | 2019-03-26 | 格力电器（合肥）有限公司 | Data read-write method, device and system |
| CN109410869A (en) * | 2018-12-11 | 2019-03-01 | 惠科股份有限公司 | A kind of read method of data, reading device and display device |
| CN109410870A (en) * | 2018-12-11 | 2019-03-01 | 惠科股份有限公司 | Sequential control circuit, method for reading data and display device |
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