WO2012169038A1 - 電子機器、電源操作ログ記録方法および記録媒体 - Google Patents
電子機器、電源操作ログ記録方法および記録媒体 Download PDFInfo
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- WO2012169038A1 WO2012169038A1 PCT/JP2011/063233 JP2011063233W WO2012169038A1 WO 2012169038 A1 WO2012169038 A1 WO 2012169038A1 JP 2011063233 W JP2011063233 W JP 2011063233W WO 2012169038 A1 WO2012169038 A1 WO 2012169038A1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/10—Programming or data input circuits
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/10—Programming or data input circuits
- G11C16/20—Initialising; Data preset; Chip identification
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C16/00—Erasable programmable read-only memories
- G11C16/02—Erasable programmable read-only memories electrically programmable
- G11C16/06—Auxiliary circuits, e.g. for writing into memory
- G11C16/22—Safety or protection circuits preventing unauthorised or accidental access to memory cells
Definitions
- the present invention relates to an electronic device, a power operation log recording method, and a recording medium, and more particularly, to an electronic device, a power operation log recording method, and a recording medium that record a log relating to connection to an external power source in a flash memory.
- Patent Document 1 discloses a technique for recording a history of operations performed on an electronic device by a user and controlling the electronic device according to the history. Specifically, the technology described in Patent Document 1 records a history of times when a user performs a power-on operation (hereinafter referred to as “power operation history”), and the next time based on the power operation history. This is a technique for calculating a predicted power-on time and automatically powering on at the next power-on predicted time.
- Patent Document 2 describes a broadcast receiving apparatus using a non-volatile memory as storage means for storing a power supply operation history.
- a flash memory is generally known as a nonvolatile memory (see Patent Document 3).
- all the data in the sector composed of a plurality of cells is erased (for example, all the data in the sector is set to “1”). Of these, data (for example, data “0”) is written into a cell that requires data writing.
- Data writing in the flash memory can be performed in cell units, but in this writing, only one of data “1” and “0” (for example, “0” data) can be written.
- the process of erasing the data in the flash memory is a process of setting the cell data to data that cannot be written (for example, “1” data), and this process cannot be executed in units of cells. , Executed in units of sectors.
- An object of the present invention is to provide an electronic device, a power operation log recording method, and a recording medium that can solve the above-described problems.
- the electronic device of the present invention is an electronic device that records a log related to connection with an external power source, A flash memory having a predetermined sector in which data is erased in an initial state, and a specific sector different from the predetermined sector; Each time it is connected to the external power source, the data representing the log is recorded in an area of the predetermined sector where the data has been erased without erasing the data in the predetermined sector, and the data in the predetermined sector is recorded. Recording means for erasing the data representing the log in the predetermined sector after recording the data representing the log in the specific sector.
- the power operation log recording method of the present invention is a power operation log recording method in an electronic device including a flash memory having a predetermined sector in which data is erased in an initial state, Each time when connected to an external power supply, without erasing the data in the predetermined sector, the data representing the log relating to the connection with the external power supply is recorded in the area where the data has been erased in the predetermined sector, Data representing the log in the predetermined sector is recorded in the specific sector, and then the data representing the log in the predetermined sector is erased.
- the recording medium of the present invention is connected to a computer connected to a flash memory having a predetermined sector from which data is erased in the initial state.
- FIG. 1 It is a block diagram showing electronic equipment 1 of one embodiment of the present invention. It is a figure for demonstrating the sector structure of the NOR type flash memory 1a. 4 is a flowchart for explaining the operation of the electronic apparatus 1.
- FIG. 1 is a block diagram showing an electronic apparatus 1 according to an embodiment of the present invention.
- the electronic device 1 includes a NOR flash memory 1a, a recording unit 1b, and an operation unit 1c.
- the NOR type flash memory 1a is an example of a flash memory.
- FIG. 2 is a diagram for explaining the sector configuration of the NOR type flash memory 1a.
- the NOR flash memory 1a has a plurality of sectors which are data erasing units.
- the plurality of sectors includes a temporary area sector 11 and a main area sector 12.
- the temporary area sector 11 can be generally called a predetermined sector. All the data in the temporary area sector 11 is erased in the initial state (for example, the initial state at the time of factory shipment) and is all set to “1”.
- This area sector 12 can generally be called a specific sector.
- the recording unit 1b can be generally called recording means.
- log relating to connection with external power supply is simply referred to as “log”
- data representing the log is simply referred to as “log data”.
- the recording unit 1b records the log data in the temporary area sector 11 in the main area sector 12 when receiving a power-on instruction to turn on the electronic device 1 in a state connected to an external power source. Thereafter, the log data in the temporary area sector 11 is erased.
- the recording unit 1b includes a power plug 1b1, an input unit 1b2, and a processing unit 1b3.
- the power plug 1b1 is connected to an external power outlet (not shown).
- the input unit 1b2 is, for example, a power-on button, and receives a power-on instruction and a power-off instruction from the user.
- the processing unit 1b3 When the power plug 1b1 is connected to the external power supply, the processing unit 1b3 receives the power supply voltage via the power plug 1b1. The processing unit 1b3 starts its operation when it receives the power supply voltage.
- the processing unit 1b3 Each time the power plug 1b1 is connected to the external power supply, the processing unit 1b3 records log data in the temporary area sector 11 in the area where the data has been deleted without erasing the data in the temporary area sector 11.
- the processing unit 1b3 records the log data in the temporary area sector 11 in the main area sector 12, and then the temporary area The log data in the sector 11 is erased. Further, when the input unit 1b2 receives a power-on instruction in a situation where the power supply voltage is received, the processing unit 1b3 supplies the power supply voltage to the operation unit 1c and activates the operation unit 1c.
- the processing unit 1b3 includes an RTC (Real Time Clock) 1b3a and a control unit 1b3b.
- RTC Real Time Clock
- RTC 1b3a outputs time data representing the date and time.
- Control unit 1b3b controls the operation of the entire recording unit 1b and controls the operation unit 1c.
- the operation unit 1c is activated when a power supply voltage is received.
- the operation unit 1 c performs an operation that characterizes the electronic device 1. For example, when the electronic device 1 is a projector, the operation unit 1c projects an image. When the electronic device 1 is a digital broadcast receiving device, the operation unit 1c receives a digital broadcast.
- FIG. 3 is a flowchart for explaining the operation of the electronic device 1.
- the power supply voltage is supplied to the processing unit 1b3.
- the state of the electronic device 1 is changed from a state in which the power is not turned on to a standby state in which only necessary minimum hardware and software operate.
- the processing unit 1b3 starts to operate, and the control unit 1b3b in the processing unit 1b3 determines that it is connected to an external power supply (step S301).
- control unit 1b3b acquires time data from the RTC 1b3a (step S302).
- control unit 1b3b generates time stamp data indicating the date and time represented by the time data from the RTC 1b3a. Subsequently, the control unit 1b3b adds data to the time stamp data that defines that a power-on operation has been performed (for example, a message “There is a power-on operation”) to generate data representing a power-on operation log. .
- the data representing the power-on operation log is an example of log data. Hereinafter, “data representing the power-on operation log” is referred to as “log data”. Subsequently, the control unit 1b3b writes and saves the log data in the area where the data has been erased in the temporary area sector 11 (step S303).
- controller 1b3b does not erase the data in the temporary area sector 11 (the operation to set all the data in the temporary area sector 11 to “1”) when writing log data to the temporary area sector 11, but is necessary. Data writing for changing the bit data of the correct cell from “1” to “0” is performed.
- the format of the log data written in the temporary area sector 11 does not have to be the same as the format of the log data written in the main area sector 12.
- the redundant part of the log data written in the main area sector 12 is partially
- the removed format may be used as a format of log data written in the temporary area sector 11.
- step S304 the state of the electronic device 1 is the state in which the power is not turned on. become.
- steps S302 and S303 are executed.
- step S303 the control unit 1b3b writes new log data so that new log data is added after the log data previously stored in the temporary area sector 11.
- step S303 the control unit 1b3b additionally records new log data in the temporary area sector 11 in the area where the data has been deleted without deleting the log data in the temporary area sector 11.
- the time required for writing data to the temporary area sector 11 is, for example, a short time on the order of microseconds.
- the standby state is maintained until the user operates the input unit 1b2 and inputs a power-on instruction (shown as “PowerOn request” in FIG. 3) in a situation where the connection with the external power source is maintained. Is done.
- control unit 1b3b supplies a power supply voltage to the operation unit 1c to change the state of the electronic device 1 to a power-on state.
- the procedure (activation) to be started is started (step S306).
- control unit 1b3b records all log data stored in the temporary area sector 11 in the main area sector 12 (step S307). S308).
- step S308 the control unit 1b3b first reads the log data already stored in the main area sector 12 and the log data stored in the temporary area sector 11. Thereafter, the control unit 1b3b deletes the log data in the main area sector 12 (a process of setting all data in the main area sector 12 to “1”). Thereafter, the control unit 1b3b sorts the read log data based on the date and time indicated in the time stamp data, and writes the sorting result in the main sector 12.
- control unit 1b3b deletes all data in the temporary area sector 11 (processing for setting all data in the temporary area sector 11 to “1”) (step S309).
- step S310 when the input unit 1b2 is operated in the power-on state and a power-off instruction (shown as “PowerOff request” in FIG. 3) is received (step S310), the control unit 1b3b is connected to the operation unit 1c. A process of stopping the operation (shown as “PowerOff procedure” in FIG. 3) is executed.
- step S311 When the process of stopping the operation of the operation unit 1c (step S311) is completed, the control unit 1b3b stops the power supply to the operation unit 1c, sets the state of the electronic device 1 to the standby state, and returns the process to step S304.
- step S304 indicates that when the electronic device 1 is in the standby state, the user can cut off the power supply of the electronic device 1 at any time.
- bit data“ 1 ” can be rewritten to“ 0 ”without erasing data in the sector (processing to set all data in the sector to“ 1 ”)”.
- the power-on operation log can be written and stored in the NOR flash memory 1a at high speed in the electronic device 1 equipped with the NOR flash memory 1a.
- the data in the temporary area sector 11 in the NOR flash memory 1a has been erased in the initial state, and the recording unit 1b has the data in the temporary area sector 11 each time it is connected to the external power supply.
- Log data is recorded in an area of the temporary area sector 11 where the data has been erased.
- the recording unit 1b records the log data in the temporary area sector 11 in the main area sector 12, and then deletes the log data in the temporary area sector 11.
- the recording unit 1b Since the recording unit 1b does not perform an erasing process for erasing data in the temporary area sector 11 when recording log data, the recording unit 1b records log data as compared with the case of recording log data with an erasing process. The time required can be shortened.
- the supply of the power supply voltage to the electronic device 1 is interrupted according to the user's operation, the log data recording is interrupted, or the data in the NOR flash memory 1a is destroyed. It is possible to reduce the risk of The log data in the temporary area sector 11 is erased after being recorded in the main area sector 12. For this reason, it becomes possible to avoid a situation in which the temporary area sector 11 is filled with log data and log data cannot be recorded. This effect is also achieved by an electronic device including the NOR flash memory 1a and the recording unit 1b.
- the recording unit 1b records the log data in the temporary area sector 11 in the main area sector 12 when receiving a power-on instruction while being connected to the external power supply, and then temporarily stores the temporary data.
- the log data in the area sector 11 is erased.
- the recording unit 1b records the log data in the temporary area sector 11 in the main area sector 12 at a time when the supply of the power supply voltage to the electronic device 1 is unlikely to be interrupted suddenly.
- a series of time-consuming operations of erasing log data in the area sector 11 is performed. Therefore, it is possible to reduce the possibility that a series of time-consuming operations are interrupted when the supply of the power supply voltage to the electronic device 1 is suddenly interrupted.
- an electronic device having a standby state is used as the electronic device 1, but the electronic device 1 may be an electronic device that does not have a standby state.
- the control unit 1b3b records the log data in the temporary area sector 11 where the data has been erased. To do.
- the processing unit 1b3 may be realized by a computer.
- the computer reads and executes a program recorded on a recording medium such as a CD-ROM (Compact Disk Read Only Memory) readable by the computer, and functions as the processing unit 1b3.
- a recording medium such as a CD-ROM (Compact Disk Read Only Memory) readable by the computer, and functions as the processing unit 1b3.
- the recording medium is not limited to the CD-ROM and can be changed as appropriate.
Abstract
Description
初期状態でデータが消去されている所定セクタと、前記所定セクタとは異なる特定セクタと、を有するフラッシュメモリと、
前記外部電源と接続するごとに、前記所定セクタ内のデータを消去することなく、前記所定セクタのうちデータが消去済みの領域に前記ログを表すデータを記録し、また、前記所定セクタ内の前記ログを表すデータを前記特定セクタに記録した後に、前記所定セクタ内の前記ログを表すデータを消去する記録手段と、を含む。
外部電源と接続するごとに、前記所定セクタ内のデータを消去することなく、前記所定セクタのうちデータが消去済みの領域に前記外部電源との接続に関するログを表すデータを記録し、
前記所定セクタ内の前記ログを表すデータを前記特定セクタに記録し、その後、前記所定セクタ内の前記ログを表すデータを消去する。
外部電源と接続するごとに、前記所定セクタ内のデータを消去することなく、前記所定セクタのうちデータが消去済みの領域に前記外部電源との接続に関するログを表すデータを記録する記録手順と、
前記所定セクタ内の前記ログを表すデータを前記特定セクタに記録した後に、前記所定セクタ内の前記ログを表すデータを消去する消去手順と、を実行させるためのプログラムを記録したコンピュータ読み取り可能な記録媒体である。
1a NOR型フラッシュメモリ
1b 記録部
1b1 電源プラグ
1b2 入力部
1b3 処理部
1b3a RTC
1b3b 制御部
1c 動作部
11 仮領域セクタ
12 本領域セクタ
Claims (5)
- 外部電源との接続に関するログを記録する電子機器であって、
初期状態でデータが消去されている所定セクタと、前記所定セクタとは異なる特定セクタと、を有するフラッシュメモリと、
前記外部電源と接続するごとに、前記所定セクタ内のデータを消去することなく、前記所定セクタのうちデータが消去済みの領域に前記ログを表すデータを記録し、また、前記所定セクタ内の前記ログを表すデータを前記特定セクタに記録した後に、前記所定セクタ内の前記ログを表すデータを消去する記録手段と、を含む電子機器。 - 請求項1に記載の電子機器において、
前記記録手段は、前記電子機器を電源オン状態にする旨の電源オン指示を前記外部電源と接続した状態で受け付けた場合に、前記所定セクタ内の前記ログを表すデータを前記特定セクタに記録し、その後、前記所定セクタ内の前記ログを表すデータを消去する、電子機器。 - 請求項1または2に記載の電子機器において、
前記フラッシュメモリは、NOR型フラッシュメモリである、電子機器。 - 初期状態でデータが消去されている所定セクタを有するフラッシュメモリを含む電子機器での電源操作ログ記録方法であって、
外部電源と接続するごとに、前記所定セクタ内のデータを消去することなく、前記所定セクタのうちデータが消去済みの領域に前記外部電源との接続に関するログを表すデータを記録し、
前記所定セクタ内の前記ログを表すデータを前記特定セクタに記録し、その後、前記所定セクタ内の前記ログを表すデータを消去する、電源操作ログ記録方法。 - 初期状態でデータが消去されている所定セクタを有するフラッシュメモリと接続されたコンピュータに、
外部電源と接続するごとに、前記所定セクタ内のデータを消去することなく、前記所定セクタのうちデータが消去済みの領域に前記外部電源との接続に関するログを表すデータを記録する記録手順と、
前記所定セクタ内の前記ログを表すデータを前記特定セクタに記録した後に、前記所定セクタ内の前記ログを表すデータを消去する消去手順と、を実行させるためのプログラムを記録したコンピュータ読み取り可能な記録媒体。
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