JP4270847B2 - Data storage device and method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data storage device and a method thereof, and is suitable for application to a mobile phone having, for example, a flash memory and storing data in the flash memory. .
[0002]
[Prior art]
In recent years, mobile phones have a flash memory which is a non-volatile memory (hereinafter referred to as a non-volatile memory), and a plurality of types of data such as outgoing call history data and incoming call history data are stored in the flash memory. There is something that was made to remember. (For example, Patent Document 1)
[0003]
[Patent Document 1]
JP 2000-47932 A (second page)
[0004]
[Problems to be solved by the invention]
By the way, in such a flash memory, for example, as shown in FIG. 9, a plurality of blocks (hereinafter referred to as data storage blocks) BKX0, BKX1, and BKX2 for storing data by dividing the storage area. ,... Are set, and to these data storage blocks BKX0, BKX1, BKX2,..., Unique addresses ADX000, ADX001, ADX002,.
[0005]
Then, the control unit of the conventional mobile phone having such a flash memory, for example, when storing outgoing call history data in the flash memory, a data storage predefined to store only outgoing call history data When the outgoing history data is written into the block (for example, the data storage block BKX0) and the outgoing history data is to be read from the flash memory, the outgoing history data is always read from the data storage block BKX0.
[0006]
However, in general, each of the data storage blocks BKX0, BKX1, BKX2,... Of the flash memory has a limit on the number of data writing / reading, so that only the data storage block BKX0 as described above can be used. If the transmission history data is continuously written / read, only the data storage block BKX0 becomes unusable at an early stage.
[0007]
In order to avoid such a problem, for example, a method is considered in which the data storage block into which the outgoing history data is written is changed as appropriate so that each of the plurality of data storage blocks in the flash memory is used equally.
[0008]
However, when a plurality of types of data such as outgoing call history data and incoming call history data are stored in the flash memory by such a method, the plurality of types of data stored in the flash memory are individually accessed and read out. The control unit of the mobile phone that has to execute processing or the like needs to grasp a data storage block in which each of these plural types of data is stored.
[0009]
Therefore, in a mobile phone employing this method, for example, a volatile memory such as SRAM (Static Random Access Memory) that functions as a work area of the control unit (hereinafter referred to as a volatile memory), for example, A table (corresponding to the data type names “outgoing history”, “incoming history”,... Of a plurality of types of data and the address of the data storage block storing each of these types of data) A data storage block in which each of a plurality of types of data is stored by storing and holding a data type / address correspondence table) and making the control unit refer to the data type / address correspondence table. It is made to be able to grasp.
[0010]
However, in such a configuration, when a malfunction (for example, stop of power supply) occurs in the volatile memory, the data type / address correspondence table stored and held by the volatile memory is damaged or disappeared. As a result, the control unit cannot grasp the data storage block storing each of the plurality of types of data and cannot access any of the plurality of types of data stored in the flash memory. There was a problem.
[0011]
The present invention has been made in consideration of the above points, and makes it possible to reliably access data stored in a non-volatile memory, and a data storage device and method for improving usability. Is to try to propose.
[0012]
[Means for Solving the Problems]
  In order to solve this problem,MingData storage deviceBecause,BadVolatile memory,VolcanoWith evoked memory,For phonebook data with a phone number, incoming history data with incoming history, or outgoing history data with outgoing historydataofAdded type information indicating the typeAppending means and type information addedDataMultiple types set for non-volatile memory by typeData storage blockOne ofThe data storage blockAssigned toAddress and,Correspondence information that associates the type of data stored in the data storage blockStore in volatile memoryBased on the storage means and correspondence information,Should readData storedBeData storage blockNoRecognize dressPhone book data, incoming call history data or outgoing call history stored in the data storage blockAccess means to access data and corresponding information is damaged or lostIs determined,Based on type information and address stored in data storage blockTheReconstruction means to reconstruct correspondence informationHave.
[0013]
  Also this departureMingData storage methodBecause,For phonebook data with a phone number, incoming history data with incoming history, or outgoing history data with outgoing historydataofAdded type information indicating the typeThe first toSteps,Type information addedDataMultiple types set for non-volatile memory by typeData storage blockOne ofRememberSecondSteps and data storage blocksAssigned toAddress and,Correspondence information that associates the type of data stored in the data storage block is recorded in the volatile memory.RememberMakeThirdBased on the steps and correspondence information,Should readData storedBeData storage blockNoRecognize dressPhone book data, incoming call history data or outgoing call history stored in the data storage blockAccess data4thStep and correspondence information is damaged or disappearedIs determined,Based on type information and address stored in data storage blockTheRebuild correspondence information5thStep andHave.
[0014]
  Thereby, even if the correspondence information stored and held by the volatile memory is damaged or disappears, the correspondence information can be reconstructed.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0016]
(1) Circuit configuration of mobile phone
In FIG. 1, reference numeral 1 denotes a circuit configuration of a mobile phone 1 as a whole, and an input unit for inputting various types of information such as numbers and characters to a control unit 2 that controls the mobile phone 1 as a whole. 3. Display unit 4 including a liquid crystal display, PSRAM (Pseudo Static Random Access Memory) 5 as volatile memory, Flash memory 6 as nonvolatile memory, and RTC (Real Time Clock) circuit 7 for measuring the current date and time Are connected and configured.
[0017]
For the control unit 2, various programs such as a basic program for executing basic processing such as call processing and incoming call processing, and a data update program for executing data update processing (described later) are provided. Stored in advance. The control unit 2 executes various processes by controlling each circuit unit in the mobile phone 1 according to these various programs.
[0018]
On the other hand, in the flash memory 6, for example, as shown in FIG. 2, a plurality of data storage blocks BK0, BK1, BK2,... Each having a size of 64 [Kbyte] by dividing the storage area into equal parts. .. Are set, and unique addresses AD000, AD001, AD002,... Are sequentially assigned to the data storage blocks BK0, BK1, BK2,.
[0019]
Among these data storage blocks BK0, BK1, BK2,..., For example, for each of the data storage blocks BK0, BK3, and BK5, a plurality of telephones registered by performing a telephone number registration operation (described later). Phonebook data D1 in which the previous telephone number is recorded as telephone number information, incoming history data D2 in which incoming history information and outgoing history information in the mobile phone 1 are recorded, and outgoing history data D3 are stored.
[0020]
Actually, the phone book data D1 is a type header HD1 “indicating that the data type of the phone book data D1 is“ phone book ”with respect to the actual data part RD1 in which the phone number information is written. “00000001 (binary number)” is added.
[0021]
Similarly, for incoming call history data D2 and outgoing call history data D3, incoming call history data D2 and outgoing call data are compared with actual data part RD2 and real data part RD3 in which incoming call history information and outgoing call history information in mobile phone 1 are recorded. A type header HD2 “00000010 (binary number)” and a type header HD3 “00000011 (binary number)” are added to indicate that the data type of the history data D3 is “incoming history” and “outgoing history”, respectively. Has been.
[0022]
(2) Data update processing
Next, as an example, FIG. 3 shows a data update processing procedure RT1 for updating the phone book data D1 among the phone book data D1, the incoming call history data D2, and the outgoing call history data D3 stored in the flash memory 6. This will be described with reference to a flowchart.
[0023]
In step SP1, for example, the control unit 2 performs a telephone number registration operation for registering a telephone number of a new telephone destination via the input unit 3 by the user, whereby the telephone number of the new telephone destination is converted into telephone number information. When input as INF1, data having a data type of “phone book” among a plurality of types of data stored in the flash memory 6 (in this case, phone book data D1, incoming call history data D2, and outgoing call history data D3) (That is, it is determined that the telephone number information INF1 should be added to the telephone book data D1), and the process proceeds to the next step SP2.
[0024]
In step SP2, the control unit 2 determines whether or not the data type / address correspondence table TBL1 (FIG. 4A) stored in advance in the PSRAM 5 can be referred to.
[0025]
Here, as shown in FIG. 4A, the data type / address correspondence table TBL1 includes the data type names “phone book” and “incoming history” of the phone book data D1, incoming call history data D2, and outgoing call history data D3. ”And“ outgoing history ”and addresses“ AD000 ”,“ AD003 ”, and“ AD005 ”of the data storage blocks BK0, BK3, and BK5 in which the phonebook data D1, incoming call history data D2, and outgoing history data D3 are stored, respectively. "Is associated and described.
[0026]
Accordingly, the control unit 2 refers to the data type / address correspondence table TBL1 to store the phone book data D1, the incoming call history data D2, and the outgoing call history data D3 stored in the flash memory 6. The storage blocks (in this case, data storage blocks BK0, BK3, and BK5) can be grasped.
[0027]
If an affirmative result is obtained in step SP2, this means that the data type / address correspondence table TBL1 is normally stored and held by the PSRAM 5, and at this time, the control unit 2 moves to the next step SP3. .
[0028]
In step SP3, the control unit 2 refers to the data type / address correspondence table TBL1, thereby recognizing the address number “AD000” corresponding to the data type name “phone book”, and proceeds to the next step SP4.
[0029]
In step SP4, the control unit 2 functions as a work area after accessing the telephone book data D1 stored in the data storage block BK0 of the flash memory 6 based on the address “AD000” recognized in step SP3. The data is read into the PSRAM 5, and the process proceeds to the next step SP5.
[0030]
Incidentally, the controller 2 does not delete the phone book data D1 stored in the data storage block BK0 even after reading the phone book data D1 from the data storage block BK0 in this way.
[0031]
In step SP5, the control unit 2 performs a process of adding the telephone number information INF1 to the real data part RD1 of the telephone directory data D1 read into the PSRAM 5, thereby creating a new real data part (hereinafter, after adding this, the actual data part RD1). (Referred to as data portion), and the process proceeds to the next step SP6.
[0032]
In step SP6, the control unit 2 re-adds the type header HD1 “00000001” for indicating that the data type is “phone book” to the post-append actual data part, thereby creating new phone book data ( Hereinafter, this is referred to as post-recording telephone directory data), and the process proceeds to the next step SP7.
[0033]
In step SP7, the control unit 2 compares the phone book data D1 that is still stored in the data storage block BK0 with the post-additional phonebook data, so that the difference data between the telephone book data D1 and the post-additional phonebook data. Is generated, it is determined whether or not the content of the difference data indicates the telephone number information INF1, and if a negative result is obtained here, this indicates that the telephone book data D1 is called. This indicates that the number information INF1 could not be added correctly. At this time, the process returns to step SP1 to cause the user to perform the telephone number registration operation again.
[0034]
On the other hand, if an affirmative result is obtained in step SP7, this indicates that the telephone number information INF1 can be accurately added to the telephone directory data D1, and the control unit 2 at this time Control goes to step SP8.
[0035]
In step SP8, for example, as shown in FIG. 5, the control unit 2 erases the phone book data D1 stored in the data storage block BK0 and additionally writes to the data storage block BK1 different from the data storage block BK0. By writing the post-phonebook data D1X, the post-additional phonebook data D1X is stored in the data storage block BK1, and the process proceeds to the next step SP9.
[0036]
In step SP9, the control unit 2 deletes the address “AD000” written in correspondence with the data type name “phone book” in the data type / address correspondence table TBL1 (FIG. 4A). As shown in FIG. 4 (B), the data type name “phone book” and the address “AD001” of the data storage block BK1 storing the post-addition phone book data D1X are described in association with each other, and the next step SP10 Then, the data update process is terminated.
[0037]
By the way, if a negative result is obtained in step SP2, the data type / address correspondence table TBL1 stored and held in the PSRAM 5 is damaged or disappeared due to some trouble in the PSRAM 5. At this time, the control unit 2 performs the process of deleting the damaged data type / address correspondence table TBL1 if it remains in the PSRAM 5, and then again the data type / address correspondence table TBL1. If is disappeared, no process is executed, and the process proceeds to the next step SP11 to start executing the table restructuring process SRT1.
[0038]
That is, in step SP11, for example, the control unit 2 sequentially scans the data storage blocks BK0, BK1, BK2,... Data storage blocks BK0, BK3, and BK5 in which D1, incoming call history data D2, and outgoing call history data D3) are stored are specified, and the process proceeds to the next step SP12.
[0039]
In step SP12, the control unit 2 reads the type headers HD1, HD2, and HD3 of the data stored in each of the data storage blocks BK0, BK3, and BK5 specified in step SP11 described above, so that the type header HD1, It is understood that each of the HD2 and HD3 represents the data type “phone book”, “incoming history”, and “outgoing history”, whereby the data stored in each of the data storage blocks BK0, BK3, and BK5 is stored. Recognizing that it is telephone directory data D1, incoming call history data D2, and outgoing call history data D3, the process proceeds to the next step SP13.
[0040]
In step SP13, the control unit 2 executes a predetermined table generation process based on the recognition result in the above-described step SP12, so that the telephone directory data D1 and the incoming call history data stored in the data storage blocks BK0, BK3, and BK5. Corresponding data type names “phone book”, “incoming history” and “outgoing history” of D2 and outgoing call history data D3 with addresses “AD000”, “AD001” and “AD002” of data storage blocks BK0, BK3 and BK5 After the data type / address correspondence table TBL1 is rewritten, the table restructuring process SRT1 is terminated and the process returns to step SP2.
[0041]
In the above configuration, the control unit 2 includes type headers HD1, HD2, and HD3 for indicating data types for the data to be stored in the flash memory 6, that is, the phone book data D1, the incoming call history data D2, and the outgoing call history data D3. Was added to each.
[0042]
As a result, even if the data type / address correspondence table TBL1 in the PSRAM 5 is damaged or disappeared, the control unit 2 is one of the data storage blocks BK0, BK1, BK2,. The data type of the data (that is, the phone book data D1, the incoming call history data D2, and the outgoing call history data D3) that is continuously stored can be grasped, and thus the data type / address correspondence table TBL1 can be reconstructed. .
[0043]
As a result, the control unit 2 can reliably refer to the data type / address correspondence table TBL1, and thus reliably with respect to the phone book data D1, incoming call history data D2, and outgoing call history data D3 stored in the flash memory 6. And it can be accessed accurately.
[0044]
In this embodiment, PSRAM 5 which is less expensive than SRAM is applied as a volatile memory for storing and holding the data type / address correspondence table TBL1. Thereby, the manufacturing cost of the mobile phone 1 can be significantly reduced.
[0045]
According to the above configuration, even if the data type / address correspondence table TBL1 in the PSRAM 5 is damaged or lost, the data type / address correspondence table TBL1 can be reconstructed, so that the flash memory 6 The stored phone book data D1, incoming call history data D2, and outgoing call history data D3 can be reliably accessed.
[0046]
(3) Power supply by secondary battery
Actually, in the mobile phone 1, a main battery (not shown) is detachably attached to the casing of the mobile phone 1, and power is supplied from the main battery to each circuit unit in the mobile phone 1. By performing the supply, basic processing such as outgoing call processing and incoming call processing is executed.
[0047]
Further, for example, as shown in FIG. 6, a secondary battery 10 that starts discharging after the main battery is removed from the casing of the mobile phone 1 is provided in the housing of the mobile phone 1. To the RTC circuit 7 and the PSRAM 5 through the RTC side switch 11 and the PSRAM side switch 12.
[0048]
The RTC side switch 11 and the PSRAM side switch 12 are respectively controlled by the RTC side switch control unit 13 and the PSRAM side switch control unit 14. The RTC side switch control unit 13 and the PSRAM side switch control unit 14 are configured to switch ON / OFF of the RTC side switch 11 and the PSRAM side switch 12 according to a power supply procedure described later.
[0049]
By the way, as a general requirement in manufacturing the cellular phone 1, even when the main battery is removed from the casing of the cellular phone 1, the RTC circuit 7 that measures the current date and time is provided for a predetermined specified period. It is stipulated that it must be operated (for example, for 30 days).
[0050]
Here, based on such requirements, a power supply procedure RT2 for appropriately supplying power from the secondary battery 10 to the RTC circuit 7 and the PSRAM 5 will be described with reference to the flowchart shown in FIG.
[0051]
That is, in step SP21, when the main battery is removed from the casing of the mobile phone 1, the RTC side switch control unit 13 and the PSRAM side switch control unit 14 turn on the RTC side switch 11 and the PSRAM side switch 12, Discharge from the secondary battery 10 to the RTC circuit 7 and the PSRAM 5 is started, and the process proceeds to the next step SP22.
[0052]
As a result, power is supplied to the RTC circuit 7 and the PSRAM 5, so that the data type / address correspondence table TBL1 can be continuously stored in the PSRAM 5 while the RTC circuit 7 is operated.
[0053]
Incidentally, the RTC side switch control unit 13 and the PSRAM side switch control unit 14 start to detect the discharge voltage of the secondary battery 10 from the moment when the discharge from the secondary battery 10 to the RTC circuit 7 and PSRAM 5 is started. Thus, the detection result is recognized as a detection voltage value.
[0054]
In step SP22, the PSRAM side switch control unit 14 waits for the detection voltage value to reach a predetermined threshold value (2.5 [V] in the present embodiment) as the discharge voltage of the secondary battery 10 drops, Here, when the detected voltage value reaches such a predetermined threshold value, this means that only the minimum battery level necessary for satisfying the requirement imposed on the RTC circuit 7 (operating the RTC circuit 7 for a specified period) is obtained. This indicates that the secondary battery 10 is secured and the remaining battery capacity of the secondary battery 10 is not sufficient, and the process proceeds to the next step SP23.
[0055]
As an example, the discharge characteristics of the secondary battery 10 in the present embodiment are shown in FIG. In the secondary battery 10, the overdischarge voltage value is, for example, 2.0 [V], and the discharge capacity C1 up to the overdischarge voltage value is 2.9 [mAh]. The discharge capacity C2 of the secondary battery 10 that is essential for operating the RTC circuit 7 for a specified period is, for example, 1.5 [mAh]. As a result, when the discharge voltage value of the secondary battery 10 drops to 2.5 [V] (corresponding to the above-mentioned predetermined threshold), only the minimum battery level necessary to satisfy the requirements imposed on the RTC circuit 7 is obtained. Can be considered to be secured in the secondary battery 10.
[0056]
In step SP23, the PSRAM side switch control unit 14 turns off the PSRAM side switch 12, thereby stopping discharge from the secondary battery 10 to the PSRAM 5, and proceeds to the next step SP24.
[0057]
Thus, in the mobile phone 1, a period until the detected voltage value by the PSRAM side switch control unit 14 reaches the above threshold after the main battery is removed from the casing of the mobile phone 1, that is, the secondary battery 10. By continuously discharging the secondary battery 10 to the PSRAM 5 during a period when the remaining battery capacity is sufficient (for example, assuming about half a day), the data type / address correspondence table TBL1 in the PSRAM 5 disappears. It is designed to prevent this.
[0058]
In step SP24, the RTC side switch control unit 13 waits for the detected voltage value to reach the overdischarge voltage value (2.0 [V] in the present embodiment) as the discharge voltage of the secondary battery 10 further decreases. If the detected voltage value reaches the overdischarge voltage value, this indicates that the secondary battery 10 is likely to be in an overdischarged state, and the process proceeds to the next step SP25.
[0059]
In step SP25, the RTC-side switch control unit 13 turns off the RTC-side switch 11, thereby stopping the discharge from the secondary battery 10 to the RTC circuit 7, and proceeds to the next step SP26 to supply power by the secondary battery 10. End RT2.
[0060]
In the above configuration, after the main battery is removed from the casing of the mobile phone 1, the secondary battery 10 has a sufficient remaining battery capacity (hereinafter referred to as a remaining battery capacity period). The battery 10 is continuously discharged from the PSRAM 5. Thereby, it is possible to prevent the data type / address correspondence table TBL1 from disappearing during the remaining battery capacity period.
[0061]
Then, after the battery remaining time has elapsed, the discharge from the secondary battery 10 to the PSRAM 5 is stopped while the discharge from the secondary battery 10 to the RTC circuit 7 is continued. As a result, the requirements imposed on the RTC circuit 7 can be satisfied.
[0062]
Thus, even if the main battery has been removed from the casing of the mobile phone 1, if the main battery is mounted again during the remaining battery remaining period, the control unit 2 can perform the above-described table reconstruction process. The data type / address correspondence table TBL1 can be referred to immediately without executing SRT1. As a result, when the main battery is mounted again, the phone book data D1, incoming call history data D2, and outgoing call history data D3 stored in the flash memory 6 can be accessed quickly and reliably.
[0063]
According to the above configuration, even when the main battery is removed, the RTC circuit 7 can be operated as required, and the data type / address correspondence table can be used during the remaining battery capacity period of the secondary battery 10. It is possible to prevent TBL1 from disappearing. Thus, when the main battery is removed within the battery remaining margin period, when the main battery is remounted, the phone book data D1 and the incoming call history data stored in the flash memory 6 quickly and reliably. D2 and outgoing call history data D3 can be accessed.
[0064]
As a result, in the mobile phone 1, even if the main battery removal work (for example, work for exchanging the main battery, etc.) that ends within the range of the remaining battery charge period is performed, the main battery is removed from the casing. When the mobile phone 1 is mounted again, the user can promptly use the functions of the cellular phone 1 (for example, the incoming call history reference function) for the phone book data D1, incoming call history data D2, and outgoing call history data D3. As a result, the usability of the mobile phone 1 can be remarkably improved.
[0065]
In addition, an event that is normally difficult to occur, such as being left with the main battery removed, occurs, and the main battery is removed from the casing of the mobile phone 1 for a long period of time (that is, when the remaining battery remaining period has passed). Thus, even if the data type / address correspondence table TBL1 in the PSRAM 5 disappears, the control unit 2 reconstructs the data type / address correspondence table TBL1 by executing the table restructuring process SRT1. Thus, the telephone directory data D1, incoming call history data D2, and outgoing call history data D3 stored in the flash memory 6 can be reliably accessed. As a result, it is possible to realize the mobile phone 1 that can reliably access the phone book data D1, the incoming call history data D2, and the outgoing call history data D3 stored in the flash memory 6 and can greatly improve the usability. it can.
[0066]
(4) Other embodiments
In the above-described embodiment, the case where the cellular phone 1 is applied as a data storage device that stores the phone book data D1, the incoming history data D2, and the outgoing history data D3 has been described. However, the present invention is not limited to this. A personal computer, PDA (Personal Digital Assistance) or the like may be applied as the data storage device.
[0067]
In the above-described embodiment, a plurality of data storage blocks (that is, BK0, BK1, BK2,...) Assigned with unique addresses (that is, AD000, AD001, AD002,...) Are set in a nonvolatile manner. Although the case where the flash memory 6 is applied as the memory has been described, the present invention is not limited to this, and a ROM (Read Only Memory) or the like may be applied as long as it is a nonvolatile memory.
[0068]
Furthermore, in the above-described embodiment, the telephone directory data D1 with the type headers HD1, HD2, and HD3 added as type information for indicating the data type for the data storage blocks BK0, BK1, BK2,. Although the case where the control unit 2 is applied as the storage unit for storing the data D2 and the transmission history data D3 has been described, the present invention is not limited thereto, and a microcomputer or the like may be applied.
[0069]
Further, in the above-described embodiment, the addresses “AD000”, “AD003”, and “AD005” of the data storage blocks BK0, BK3, and BK5 and the phone book data D1, stored in the data storage blocks BK0, BK3, and BK5, Although the case where the PSRAM 5 is applied as the volatile memory that stores and holds the data type / address correspondence table TBL1 in which the data types of the incoming history data D2 and the outgoing history data D3 are associated has been described, the present invention is not limited to this. As long as it is a volatile memory, for example, an SRAM or the like may be applied.
[0070]
Further, in the above-described embodiment, in the data type / address correspondence table TBL1 as correspondence information, the data type names “phone book”, “incoming history” and “outgoing history” and addresses “AD000”, “AD003” and “AD005” However, the present invention is not limited to this, and the data storage in which the phone book data D1 (or the phone book data D1X), the incoming call history data D2, and the outgoing call history data D3 are stored. If it is possible to grasp the address of the block, for example, in the data type / address correspondence table TBL1, the content of the type header (that is, a number expressed in binary) and the address may be described in association with each other. .
[0071]
Further, in the above-described embodiment, based on the data type / address correspondence table TBL1, for example, data of the desired data type “phone book” (that is, phone book data D1) is stored in the data storage block BK0. Although the case where the control unit 2 is applied as the access means for accessing the data by recognizing the address “AD000” has been described, the present invention is not limited to this, and a microcomputer or the like may be applied. .
[0072]
Further, in the above-described embodiment, the addresses “AD000”, “AD003”, and “AD005” of the data storage block and the type headers HD1, HD2, and HD3 as the type information of the data stored in the data storage block are included. Based on the above, the case where the control unit 2 is applied as the reconstruction means for reconstructing the data type / address correspondence table TBL1 has been described. However, the present invention is not limited to this, and the table reconstruction process SRT1 can be executed. A microcomputer or the like may be applied.
[0073]
Furthermore, in the above-described embodiment, as an operating portion that should operate according to predetermined requirements, after the main battery is removed from the casing of the mobile phone 1, it does not operate for a predetermined specified period (for example, 30 days). However, the present invention is not limited to this. For example, even after the main battery is removed from the casing of the mobile phone 1, other wireless communication devices are described. A wireless communication unit or the like that imposes a requirement that it must continue to operate in order to wait for a transmission signal from the computer may be applied.
[0074]
Furthermore, in the above-described embodiment, the case where the secondary battery 10 is applied as the spare battery that starts discharging after the discharge from the main battery as the main power source in the mobile phone 1 has been described, but the present invention is not limited thereto. For example, you may make it apply a lithium storage battery, a lithium ion storage battery, etc.
[0075]
Furthermore, in the above-described embodiment, after the secondary battery 10 starts discharging, the battery remaining amount of the secondary battery 10 is reduced to the essential battery remaining amount that is essential to satisfy the requirements of the RTC circuit 7. In the battery remaining capacity period, the discharge of the secondary battery 10 is guided to the RTC circuit 7 and the PSRAM 5, so that the data type / address correspondence table TBL1 is continuously stored in the PSRAM 5 while the RTC circuit 7 is operated. As the discharge control means for operating the RTC circuit 7 as required by guiding the discharge of the secondary battery 10 only to the RTC circuit 7 after the allowance period has elapsed, RTC side switch 11, PSRAM side switch 12, RTC side switch control Unit 13 and PSRAM side switch control unit 14 It is described that use, the present invention is not limited to this, it may be applied to devices like for controlling the various switches and the switch.
[0076]
【The invention's effect】
  As described above, according to the present invention, even when the correspondence information stored and held by the volatile memory is damaged or disappeared, the correspondence information can be reconstructed and thus stored in the nonvolatile memory. Data can be reliably accessed. As a result, the data stored in the nonvolatile memory can be reliably accessed.And improve usabilityData storage device and method thereof can be realized.
[Brief description of the drawings]
FIG. 1 is a schematic diagram illustrating a circuit configuration of a mobile phone according to an embodiment of the present invention.
FIG. 2 is a schematic diagram showing a state (1) of a flash memory.
FIG. 3 is a flowchart showing a data update processing procedure.
FIG. 4 is a schematic diagram showing a state of a data type / address correspondence table;
FIG. 5 is a schematic diagram showing a state (2) of the flash memory.
FIG. 6 is a schematic diagram showing a state of power supply by a secondary battery.
FIG. 7 is a flowchart showing a power supply procedure by a secondary battery.
FIG. 8 is a schematic diagram illustrating discharge characteristics of a secondary battery.
FIG. 9 is a schematic diagram illustrating a configuration of a secondary battery.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Mobile phone, 2 ... Control part, 5 ... PSRAM, 6 ... Flash memory, 7 ... RTC circuit, SRT1 ... Table reconstruction process procedure.

Claims (6)

And the non-volatile memory,
And the volatile memory,
Phone book data telephone number is written, with respect to the outgoing call history data call history to be written is incoming history data or outgoing call history noted, and adding means for adding a type information indicating a type of the data,
The type information is additional data, in type units, is stored in any of a plurality of data storage blocks set to said non-volatile memory, and an address allocated to said data storage blocks, the data storage Storage means for storing correspondence information in association with the type of data stored in the block in the volatile memory ;
Based on the correspondence information, data to be read to recognize the address of the data storage blocks to be stored, the telephone directory data stored in the data storage block, access to access the incoming call history data or the outgoing call history data Means,
If the upper SL corresponding information is determined to be damaged or disappears, a data storage and a reconstruction means for reconstructing the upper Symbol correspondence information based on the type information and the address stored in the data storage block apparatus. The storage means is
When the content of the data accessed by the access means is updated, it is stored in a data storage block that is different from the data storage block in which the data is stored, among the empty data storage blocks, and the content according to the storage The data storage device according to claim 1 , wherein the correspondence information is rewritten . The nonvolatile memory is composed of a flash memory, data storage device according to claim 1. The volatile memory is made in PSRAM, data storage device according to claim 1. A first step of adding type information indicating a type of the data to phonebook data in which a telephone number is written, incoming history data in which an incoming history is written, or outgoing history data in which an outgoing history is written ;
A second step of storing the data to which the type information is added in any of a plurality of data storage blocks set for the nonvolatile memory in units of types ;
The address assigned to the data storage block, and a third step of corresponding information the serial volatile memory 憶 associating the type of data stored in the data storage block,
Based on the correspondence information, and recognizes the address of the data memory block in which data is stored to be read, the data storage block stored in the said telephone directory data, the access to the incoming call history data or the outgoing call history data 4 steps,
If the upper SL corresponding information is determined to be damaged or disappears, the data and a fifth step of reconstructing the upper Symbol correspondence information based on the type information and the address stored in the data storage block Memory method. In the fourth step,
When the content of the data accessed in the third step is updated, it is stored in a data storage block that is different from the data storage block in which the data is stored, among the empty data storage blocks, and in accordance with the storage The data storage method according to claim 5, wherein the correspondence information is rewritten to the contents.

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