JP2005258605A - Information processor and program of information processing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to certainly prevent system down or runaway of a system, by maintaining always real time function, even if an environment condition of the system changes to an abnormal status, or file manipulation is performed after reboot. <P>SOLUTION: A CPU 101 monitors the environment condition of a cellular phone, and when the supplied voltage becomes lower or when the ambient temperature becomes higher than or lower than the temperature set up beforehand, the date and time information outputted by a real time clock 106 is stored in the flash memory 105, and when the date and time information inputted by an operation section 110 indicates the date and time newer than the date and time information stored in the flash memory 105, the date and time information is set up as initial date and time in the real time clock 106. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an information processing apparatus and an information processing program, and more particularly to an information processing apparatus and an information processing program for controlling a real-time clock.

  In general, in an information processing apparatus such as a personal computer, a PDA (personal digital assistants), and a mobile phone, an operating system (OS), a file managed by a user, and the like are managed based on a real-time clock that measures the current time. Time stamp management is performed. For this reason, when a malfunction occurs in the operation of the real-time clock circuit that generates the real-time clock, the time stamp management is broken, and there is a possibility that the apparatus stops or runs away. Therefore, conventionally, a dedicated power source that is separate from other circuits has been used as the power source that supplies the real-time clock circuit.

  FIG. 6 is a schematic block diagram showing a functional configuration of a conventional mobile phone. In FIG. 6, a CPU 201 is connected to an SDRAM 202, which is a work area, via a synchronous expansion bus 201a, and a boot flash memory (NOR) 203 at the time of restart and a mobile phone via an asynchronous expansion bus 201b. It is connected to the ASIC 204 that performs the dedicated function. The ASIC 204 includes a plurality of circuit blocks (not shown) such as a CODEC (encoding / decoding processing circuit), a USB (Universal Serial Bus) host circuit, a function circuit, and a network circuit.

Further, a flash memory (NAND) 205 for data storage is connected to the ASIC 204. Since the flash memory 205 is not adapted to an interface such as a general SRAM, it cannot be directly connected to the asynchronous expansion bus 201b of the CPU 201, and is connected to the asynchronous expansion bus 201b via the ASIC 204. A real time clock (RTC) 206 is connected to the CPU 201 by a serial bus 206a. The real time clock 206 is driven by a battery 207 which is a dedicated power source.
Further, a large-capacity capacitor 208 is connected to the power supply line of the real-time clock 206. When the battery 207 is replaced, the real-time clock 206 is charged by the electric charge charged in the capacitor 208 for a certain period of time. By guaranteeing the power supply voltage to be supplied, the real-time function can be maintained.
In addition, a transmitting / receiving unit (TX / RX) 209 which is a component of the mobile phone is connected to the ASIC 204, an operation unit (SWITCH) 210 including a key switch and a display unit (LCD) 211 such as a liquid crystal are connected to the CPU 201. Yes.

  As described above, the real-time function of the conventional real-time clock 206 is maintained by the battery 207 and the large-capacitance capacitor 208. However, when the user does not notice the voltage drop of the battery 207, or the battery replacement time becomes longer. If the voltage supplied from the capacitor 208 to the real-time clock 206 drops, the real-time function is lost and the current time cannot be obtained, and when restarted, for example, the factory-set date and time are set. End up. For this reason, if a file operation is performed after restarting, the time stamp management may be broken, resulting in a system down or system runaway.

On the other hand, in a certain patent document, an imaging apparatus that automatically sets a date and time close to the current time at the time of restart after the real-time function is lost, and a control method therefor have been proposed.
The proposed imaging apparatus records an image capturing unit capable of capturing an image and generating image data, a time measuring unit that measures the date and time, and data obtained by adding the date and time data to the image data in a nonvolatile memory, Furthermore, it has a configuration having input / output means capable of reading date / time data recorded together with the image data, and reset means capable of resetting the time measuring means based on the latest date / time data read from the nonvolatile memory. Yes.
The proposed control method also includes a recording step of adding the date / time data measured by the timing means to the imaging data obtained by capturing an image and recording the data in a nonvolatile memory, and the date / time data recorded together with the image data. And a resetting step for resetting the timing means.

Therefore, it is described that when the image data is recorded, the date and time set at the time of reset can always be the date and time close to the current date and time, and the date and time adjustment of the time measuring means after reset is simplified. ing. (See Patent Document 1)
JP 2000-125164 A

  However, in Patent Document 1, when the image data is not recorded, the RTC of the imaging apparatus cannot be reset at a date and time close to the current date and time. Image data recorded in a device equipped with an imaging function such as a digital camera or a camera-equipped mobile phone can be transferred to a personal computer and stored, or transmitted to another mobile phone. There is no guarantee that data is always recorded in non-volatile memory. Even if the image data is recorded in a non-volatile memory, if the date / time data of the image data is not the latest date / time, the date / time set at the time of reset is always close to the current date / time. I can't.

  Therefore, even with the configuration of the above-mentioned Patent Document 1, when the voltage drop of the battery, which is a dedicated power source for the real time clock, or the time for replacing the battery becomes long, the real time function is lost and the current time cannot be obtained. However, the problem that the system down and the system runaway cannot be reliably prevented as a result of the time stamp management failure due to the file operation after the restart cannot be solved. Further, when configured using a large-capacitance capacitor as in the conventional example shown in FIG. 6, there is a problem that it is difficult to reduce the size of the apparatus because the shape of the capacitor increases.

  The present invention solves such a conventional problem and always maintains the real-time function of the real-time clock even when the environmental state of the apparatus changes to an abnormal state or a specific state designated in advance. When file operations are performed after startup, system down and system runaway can be reliably prevented, and downsizing of the device can be achieved by not using large parts such as large capacitors. It is an object to provide a processing device and an information processing program.

The information processing apparatus according to claim 1 is based on date and time information output from time measuring means (in the embodiment, corresponding to the real-time clock 106 in FIG. 1) for measuring time from a set initial date and time. An information processing apparatus that performs management,
When detecting the environmental state of this apparatus and detecting a state transition designated in advance (corresponding to the CPU 101 in FIG. 1 in the embodiment) and the state transition designated by the detection unit The storage control means (corresponding to the CPU 101 in FIG. 1 in the embodiment) stores the date and time information output by the time measuring means in the nonvolatile storage means (corresponding to the flash memory 105 in FIG. 1 in the embodiment). ), Input means for inputting date and time information according to a predetermined operation (corresponding to the operation unit 110 in FIG. 1 in the embodiment), and date and time information input by the input means are stored in the storage means. In the case of indicating a date and time newer than the date and time information, setting means for setting the input date and time information as an initial date and time in the time measuring means (in the embodiment, the CP in FIG. And corresponding) to 101 has a structure equipped with.

In the information processing apparatus according to claim 1, as described in claim 2, when the date and time information input by the input unit is not newer than the date and time information stored in the storage unit, the setting unit again A warning that prompts the input of the date and time information may be configured to be indicated by predetermined notification means (in the embodiment, corresponding to the display unit 111 in FIG. 1 or a speaker, LED, or the like not shown).
In the information processing apparatus according to claim 1, as described in claim 3, the detection unit monitors the state of the power supply voltage supplied to the apparatus, and the reduction of the power supply voltage is designated in advance. You may make it the structure which detects as a state transition.
The information processing apparatus according to claim 1, wherein the detection unit monitors the state of the file write operation on the apparatus and detects the file write operation as a state transition designated in advance. Such a configuration may be adopted. Furthermore, in the information processing apparatus according to claim 4, as described in claim 5, the detection unit detects a case where the file related to the write operation is a file in a use area of the operation system as a state transition designated in advance. Such a configuration may be adopted.
In the information processing apparatus according to claim 1, as described in claim 6, the detection unit monitors the state of the ambient temperature of the apparatus and detects a sudden temperature change as a state transition designated in advance. It may be configured.
In the information processing apparatus according to claim 1, as described in claim 7, the detection unit monitors the state of the ambient temperature of the apparatus, and the ambient temperature is a temperature higher or lower than a preset temperature range. It may be configured to detect the case of the state transition as the state transition designated in advance.
In the information processing apparatus according to claim 1, as described in claim 8, the storage control means stores in the storage means the date and time information output by the time measuring means before the apparatus transits to the sleep state or the shutdown state. Such a configuration may be adopted.

The information processing program according to claim 9 is based on date and time information output from time measuring means (in the embodiment, corresponding to the real-time clock 106 in FIG. 1) for measuring time from a set initial date and time. An information processing program for managing
A first step of monitoring the environmental state of the apparatus and detecting a pre-designated state transition (in the embodiment, this corresponds to an operation of shifting from the main routine of FIG. 2 to the interrupt processing of FIG. 4); When the first step detects the designated state transition, the date and time information output from the time measuring means is stored in a nonvolatile storage means (corresponding to the flash memory 105 in FIG. 1 in the embodiment). 2 step (corresponding to the RTC saving process of FIG. 4 in the embodiment) and a third step of inputting date and time information in accordance with a predetermined operation (in the embodiment, step SB1 of FIG. 3 and FIG. 5) And the date and time information input in the third step indicates a date and time that is newer than the date and time information stored in the storage means (in the embodiment, In step SB7 in FIG. 3 and step SD6 in FIG. 5 (corresponding to NO in step SD6), a fourth step (in the embodiment, step SB4 in FIG. 3) sets the input date and time information as the initial date and time in the time measuring means. And (corresponding to step SD4 in FIG. 5).

In the information processing program according to claim 9, as described in claim 10, in the fourth step, the date information input by the third step is not newer than the date information stored in the storage means. Alternatively, a warning that prompts the user to input the date / time information again may be configured to be indicated by predetermined notification means (in the embodiment, corresponding to the display unit 111 in FIG. 1 or a speaker, LED, or the like not shown). .
In the information processing program according to claim 9, as described in claim 11, the fourth step monitors the state of the power supply voltage supplied to the apparatus and is designated in advance to decrease the power supply voltage. You may make it the structure which detects as a state transition.
In the information processing program according to claim 9, as described in claim 12, the fourth step monitors a state of a file write operation with respect to the device, and a state transition in which the file write operation is designated in advance. It may be configured to detect as follows. Further, in the information processing program according to claim 9, as described in claim 13, the fourth step is a state transition designated in advance when the file related to the write operation is a file in the use area of the operation system. It may be configured to detect as follows.
In the information processing program according to claim 9, as described in claim 14, the fourth step monitors the ambient temperature state of the device and detects a sudden temperature change as a predesignated state transition. You may make it the structure which does.
In the information processing program according to claim 9, as described in claim 15, the fourth step monitors the state of the ambient temperature for the device, and the ambient temperature is higher than a preset temperature range. Or you may make it the structure which detects the case where it becomes low temperature as a state transition designated beforehand.
In the information processing program according to claim 9, as described in claim 16, in the second step, the date and time information output by the time measuring means before the apparatus enters the sleep state or the shutdown state is stored in the storage means. You may make it the structure which memorize | stores.

  According to the information processing apparatus and the information processing program of the present invention, the real-time function of the real-time clock is always maintained even after the environmental state of the apparatus changes to a predetermined abnormal state or a specific state. When file operations are performed, system down and system runaway can be reliably prevented, and the size of the device can be reduced by not using large-sized parts such as a large-capacitance capacitor for supplying power to the real-time clock. The effect that it can aim at is acquired.

Hereinafter, first and second embodiments of an information processing apparatus according to the present invention will be described with reference to the drawings by taking a mobile phone as an example.
FIG. 1 is a schematic block diagram showing a configuration of a mobile phone in each embodiment.
In FIG. 1, a CPU 101 is connected to an SDRAM (Synchronous RAM) 102, which is a work area, via a synchronous expansion bus 101a. The SDRAM 102 operates in synchronization with a clock having a fixed period in the synchronous bus 101a.
The CPU 101 is also connected via an asynchronous expansion bus 101b to a flash memory (NOR) 103 for booting at the time of restart and an ASIC 104 that performs a dedicated function of the mobile phone. The flash memory 103 can perform random access at high speed, and stores an operation system program, an information processing program, and other control programs. The ASIC 104 includes a plurality of circuit blocks (not shown) such as a CODEC (encoding / decoding processing circuit), a USB (Universal Serial Bus) host circuit, a function circuit, and a network circuit.

  Further, the ASIC 104 is connected to a data storage flash memory (NAND) 105 that reads and writes data in units of blocks. Since the flash memory 105 is not adapted to an interface such as a general SRAM, it cannot be directly connected to the asynchronous expansion bus 101b of the CPU 101, but is connected to the asynchronous expansion bus 101b via the ASIC 104. The flash memory 105 stores the factory default date and time as an initial value.

  A real time clock (RTC) 106 is connected to the CPU 101 by a serial bus 106a. The real-time clock 106 measures the time from the initial date / time set at the time of factory shipment or the initial date / time set by the user's operation, and outputs the date / time information, that is, the current date / time to the CPU 101. Unlike the conventional example shown in FIG. 6, the power supply of the real time clock 106 is driven by the power supplied to the CPU 101 and the like, and a large capacity capacitor is connected to the power supply line of the real time clock 106. It has not been.

Furthermore, a temperature sensor (TS) 107 that detects the ambient temperature is connected to the CPU 101 by a serial bus 107a. The ASIC 104 is connected to a voltage detection circuit (DET) 108 that monitors the voltage VDCIN of the power source supplied to the mobile phone. The voltage detection circuit 108 may be connected to an input port of the CPU 101. Alternatively, in the case where a CPU having an A / D converter is used, a configuration in which the voltage VDCIN is directly or dividedly input to the corresponding input port and the power supply voltage is monitored by the CPU is also possible. .
A transmitting / receiving unit (TX / RX) 109, which is a component of a mobile phone, is connected to the ASIC 104, an operation unit (SWITCH) 110 including a key switch and a display unit (LCD) 111 such as a liquid crystal are connected to the CPU 101. Yes. Although not shown in FIG. 1, a microphone and a speaker for calling and an LED for notification of incoming calls are provided.

Next, the operation of the first embodiment executed by the CPU 101 in the mobile phone having the configuration shown in FIG. 1 will be described with reference to the flowcharts shown in FIGS.
FIG. 1 is a flowchart of the main routine. First, in the initial processing, it is investigated whether or not RTC confirmation is necessary due to a voltage drop or a rapid temperature change. Therefore, it is determined whether the flag RTCF is “1 (confirmation required)” or “0 (confirmation unnecessary)” (step SA1). If the RTCF is “1” and confirmation is required, RTC confirmation processing is executed (step SA2). After the RTC confirmation process or when the RTCF is “0”, other initial processes are performed (step SA3).

  Thereafter, a loop of input processing (step SA4), display processing (step SA5), and other processing (step SA6) is repeatedly executed. In the input process of step SA4, commands and data are input according to the operation of each switch of the operation unit 110. The input commands include a system file update (write) command, a normal file update command not related to the system, a call processing command, and other commands. In the display process of step SA5, data and a message are displayed on the display unit 111. Other processes in step SA6 include voice data and mail transmission / reception processes.

  FIG. 3 is a flowchart of the RTC confirmation process in step SA2 in the main routine. It is determined whether or not a date / time has been input from the operation unit 110, and when it is input, the input date / time is stored in the register B (step SB1). Then, it is determined whether or not the flag INIT is “0” (step SB2). This flag indicates whether the initial date and time of the real-time clock 106 has been set (INIT = 1) or not set (INIT = 0), and is reset to “0” at the time of factory shipment. If INIT is “0”, INIT is set to “1” (step SB3), and the input date / time of register B is set as the initial date / time in real time clock 106 (step SB4).

  If INIT is “1” in step SB2, the date and time stored in the flash memory 105 is stored in the register A (step SB5). Then, it is determined whether or not the date and time of the register A is an initial value at the time of factory shipment (step SB6). If the factory default value is set, the input date and time of the register B is set as the initial date and time in the real-time clock 106 (step SB4).

  If the date and time of the register A is not the initial value at the time of factory shipment, it is determined whether or not the date and time of the register A is newer than or the same as the date and time of the register B (step SB7). If the date / time of A is older than the date / time of B, the input date / time of the register B is set as the initial date / time in the real-time clock 106 (step SB4).

In step SB7, if the date / time of A is newer than or the same as the date / time of B, that is, if the date / time set before is newer or the same as the date / time set this time, the date / time set this time is incorrect. If so, a reset confirmation message is displayed on the display unit 111 (step SB8). For example, “Do you want to reset the date and time? …… Set / Do not set” is displayed, and the operation of the corresponding switch is awaited. When the switch corresponding to “reset” is turned on, the process proceeds to step SB1 and waits for the input of the date and time. When the switch corresponding to “not reset” is turned on, the input date and time of the register B is set as the initial date and time in the real time clock 106 (step SB4).
In step SB4, after setting the input date / time of the register B as the initial date / time in the real time clock 106, the flag RTCF is reset to “0” (step SB10). Then, the process returns to the main routine of FIG. Therefore, after completing this RTC confirmation process, the real-time clock 106 measures the time using the input date and time from the operation unit 110 as the initial date and time.

  FIG. 4 is a flowchart of the RTC saving process. This process is performed when the input voltage VDCIN detected by the voltage detection circuit 108 falls below a predetermined value, when the ambient temperature detected by the temperature sensor 107 changes suddenly, or in a predetermined range (for example, −10 When the temperature becomes higher or lower than (° C. to + 70 ° C.), it is executed as an interrupt process. The current date and time of the real-time clock 106 is stored in the register A (step SC1), and the date and time stored in the register A is stored in the flash memory 105 (step SC2). Next, the flag RTCF is set to “1” (step SC3). Then, the process returns to the main routine.

  As described above, according to the first embodiment, the CPU 101 monitors the environmental state of the mobile phone, and when the input voltage VDCIN falls below a predetermined value or when the ambient temperature changes abruptly, When a pre-designated state transition is detected, such as when the temperature is higher or lower than a predetermined range, the date and time information output by the real-time clock 106 is stored in the flash memory 105, and the operation unit 110 When the input date and time information indicates a date and time newer than the date and time information stored in the flash memory 105, the date and time information is set as the initial date and time in the real-time clock 106.

  Therefore, even when the environmental state of the apparatus changes to an abnormal state, the real-time function of the real-time clock 106 is always maintained, and when a file operation is performed after restarting, it is possible to reliably prevent a system down or a system runaway. In addition, since a large-sized component such as a large-capacity capacitor for supplying power to the real-time clock 106 is not used, the apparatus can be reduced in size.

  Next, the operation of the RTC confirmation process of the second embodiment executed by the CPU 101 in the mobile phone having the configuration of FIG. 1 will be described based on the flowchart shown in FIG. Note that the main routine and RTC storage processing of the CPU 101 in the second embodiment are the same as those in the flowchart of the first embodiment shown in FIGS. 2 and 4. The operation of the second embodiment will be described.

  In FIG. 5, it is determined whether or not a date / time has been input from the operation unit 110, and when it is input, the input date / time is stored in the register B (step SD1). Then, it is determined whether the flag INIT is “1 (initial date has been set)” or “0 (initial date has not been set)” (step SD2). As in the first embodiment, this flag is reset to “0” at the time of factory shipment. If INIT is “0”, INIT is set to “1” (step SD3), and the input date / time of register B is set as the initial date / time in real time clock 106 (step SD4).

  If INIT is “1” in step SD2, the latest date and time of the file whose time stamp is managed is retrieved and stored in register A (step SD5). Then, it is determined whether or not the date and time of the register A is newer than or the same as the date and time of the register B (step SD6). If the date / time of A is older than the date / time of B, the input date / time of the register B is set as the initial date / time in the real-time clock 106 (step SD4).

If the date / time of A is newer than or the same as the date / time of B, that is, if the latest date / time of the file is newer or the same as the date / time set this time, the date / time set this time is incorrect. Then, a reset confirmation message is displayed on the display unit 111 (step SD7). For example, “Do you want to reset the date and time? …… Set / Do not set” is displayed, and the operation of the corresponding switch is awaited. When the switch corresponding to “reset” is turned on, the process proceeds to step SD1 to wait for input of the date and time. When the switch corresponding to “not reset” is turned on, the input date and time of the register B is set as the initial date and time in the real time clock 106 (step SD4).
In step SD4, after setting the input date / time of the register B to the real time clock 106 as the initial date / time, the flag RTCF is reset to “0” (step SD10). Then, the process returns to the main routine of FIG. Note that when the switch corresponding to “Do not reset” is turned on, a message indicating that the time stamp management may fail may be displayed on the display unit 111.

  Therefore, even if the environmental state of the device changes to a file update state that is a specific state specified in advance, the real-time function of the real-time clock is always maintained, time stamp management is performed, and file operations are performed after restart In this case, system down and system runaway can be reliably prevented, and a large-sized component such as a large-capacitance capacitor for supplying power to the real-time clock 106 is not used, so that the size of the apparatus can be reduced. .

In this case, the latest date and time of all the files are not searched, but only when the file of the write operation is a system file closely related to the operation of the operation system, that is, the file of the write operation is Only in the case of a file in the use area, the latest date and time of the file may be searched and stored in the register A.
According to this configuration, the number of times of interrupt processing can be reduced compared to the case where all files are searched, and the time for searching for the latest date and time of the searched file is also shortened. In addition, system files that are closely related to the operation of the operation system have the advantage of high reliability compared to the case of referring to other general files because the date check at the time of file rewriting is strict. .

  In the first and second embodiments, if the date and time input by the operation unit 110 is not newer than the date and time stored in the flash memory 105, a warning message prompting the user to input the date and time again is displayed on the display unit 111. Since the configuration is displayed and shown, when the user inputs an incorrect date and time, the user can be alerted by pointing out the error.

  In the first and second embodiments, the date and time output by the real-time clock 106 may be stored in the flash memory 105 before transition to the sleep state or the shutdown state. In this case, the current date and time output from the real time clock 106 can be meticulously saved.

  In each of the above embodiments, the information processing apparatus of the present invention has been described by taking a mobile phone as an example, but the information processing apparatus to which the present invention can be applied is not limited to a mobile phone. For example, the present invention can be applied to all information processing apparatuses such as mobile communication terminals such as PHS and PDA, personal computers, office computers, workstations, mainframes, and the like that can malfunction due to the influence of power supply voltage and ambient temperature. Furthermore, the present invention can be applied to an information processing apparatus such as a facsimile machine or a copying machine that has time stamp management as a basic function. That is, each of the above embodiments shows an example of the present invention, and it can be easily understood by those skilled in the art that the present invention can be applied to various information processing apparatuses without departing from the scope of the claims.

  Furthermore, in each of the above-described embodiments, the information processing apparatus of the present invention has been described by taking a mobile phone in which the CPU 101 executes an information processing program stored in advance in the flash memory 105 as an example. A configuration in which an information processing program downloaded from an accessed external server is installed in the flash memory 105 and the CPU 101 executes the program is also possible. In this case, the invention of the program can be realized.

That is, the information processing program is an information processing program for managing the date and time based on the date and time information output from the time measuring means for measuring the time from the set initial date and time,
A first step of monitoring the environmental state of the device and detecting a pre-designated state transition;
When the first step detects the designated state transition, a second step of storing date and time information output from the time measuring means in a nonvolatile storage means;
A third step of inputting date and time information according to a predetermined operation;
When the date and time information input in the third step indicates a date and time that is newer than the date and time information stored in the storage unit, the input date and time information is set as an initial date and time in the time measuring unit. Steps,
Execute.

In this case, the fourth step is a warning that prompts the user to input the date / time information again when the date / time information input by the third step is not newer than the date / time information stored in the storage means. Is indicated by a predetermined notification means.
In the fourth step, the state of the power supply voltage supplied to the apparatus is monitored, and a decrease in the power supply voltage is detected as the state transition designated in advance.
In the fourth step, the state of the file write operation with respect to this apparatus is monitored, and the file write operation is detected as the state transition designated in advance. Further, in this case, the fourth step detects the case where the file related to the write operation is a file in the use area of the operation system as the state transition designated in advance.
In the fourth step, the state of the ambient temperature of the apparatus is monitored, and a sudden temperature change is detected as the previously designated state transition.
In the fourth step, the state of the ambient temperature for the device is monitored, and when the ambient temperature becomes higher or lower than a preset temperature range, the state transition designated in advance is performed. To detect.
In the second step, the date and time information output by the time measuring means before the device transits to the sleep state or the shutdown state is stored in the storage means.

The block diagram which shows the structure of the mobile telephone in embodiment of this invention. The flowchart of the main routine of CPU in FIG. The flowchart of the RTC confirmation process of 1st Embodiment in FIG. The flowchart of the RTC preservation | save process performed by the interruption process in FIG. The flowchart of the RTC confirmation process of 2nd Embodiment in FIG. FIG. 6 is a schematic block diagram showing a functional configuration of a conventional mobile phone.

Explanation of symbols

101 CPU
102 SDRAM
103 Flash memory (NOR)
104 ASIC
105 Flash memory (NAND)
106 Real-time clock (RTC)
107 Temperature sensor (TS)
108 Voltage detection circuit (DET)
109 Transmitter / Receiver (TX / RX)
110 Operation unit (SWITCH)
111 Display (LCD)

Claims (16)

An information processing apparatus that manages date and time based on date and time information output from a time measuring means that measures time from a set initial date and time,
Detecting means for monitoring the environmental state of the device and detecting a state transition designated in advance;
When the detection means detects the designated state transition, a storage control means for storing date and time information output by the timing means in a nonvolatile storage means;
An input means for inputting date and time information according to a predetermined operation;
If the date and time information input by the input means indicates a date and time newer than the date and time information stored in the storage means, a setting means for setting the input date and time information as an initial date and time in the time measuring means;
An information processing apparatus comprising:   When the date and time information input by the input unit is not newer than the date and time information stored in the storage unit, the setting unit indicates a warning prompting the user to input the date and time information again by a predetermined notification unit. The information processing apparatus according to claim 1.   2. The information processing apparatus according to claim 1, wherein the detection unit monitors a state of a power supply voltage supplied to the apparatus and detects a decrease in the power supply voltage as the predetermined state transition. .   The information processing apparatus according to claim 1, wherein the detection unit monitors a state of a file write operation with respect to the apparatus and detects a file write operation as the state transition designated in advance.   The information processing apparatus according to claim 4, wherein the detection unit detects a case where a file related to a write operation is a file in a use region of an operation system as the state transition designated in advance.   The information processing apparatus according to claim 1, wherein the detection unit monitors an ambient temperature state of the apparatus and detects a rapid temperature change as the predetermined state transition.   The detection means monitors the state of the ambient temperature of the device and detects when the ambient temperature is higher or lower than a preset temperature range as the predetermined state transition. The information processing apparatus according to claim 1.   The information processing apparatus according to claim 1, wherein the storage control unit stores the date and time information output by the timing unit before the apparatus transits to a sleep state or a shutdown state. An information processing program for an apparatus that performs date and time management based on date and time information output from a clock means that measures time from a set initial date and time,
A first step of monitoring the environmental state of the device and detecting a pre-designated state transition;
When the first step detects the designated state transition, a second step of storing date and time information output from the time measuring means in a nonvolatile storage means;
A third step of inputting date and time information according to a predetermined operation;
When the date and time information input in the third step indicates a date and time that is newer than the date and time information stored in the storage unit, the input date and time information is set as an initial date and time in the time measuring unit. Steps,
Information processing program that executes   In the fourth step, when the date and time information input in the third step is not newer than the date and time information stored in the storage means, a warning for prompting the user to input the date and time information again is given. The information processing program according to claim 9, which is indicated by means.   10. The information according to claim 9, wherein in the fourth step, the state of the power supply voltage supplied to the device is monitored, and a decrease in the power supply voltage is detected as the state transition designated in advance. Processing program.   10. The information processing apparatus according to claim 9, wherein the fourth step monitors a state of a file write operation with respect to the apparatus and detects a file write operation as the predetermined state transition. program.   13. The information processing program according to claim 12, wherein in the fourth step, a case where a file related to a write operation is a file in a use area of the operation system is detected as the pre-designated state transition.   10. The information processing program according to claim 9, wherein the fourth step monitors the state of the ambient temperature of the apparatus and detects a rapid temperature change as the pre-designated state transition.   In the fourth step, the state of the ambient temperature for the device is monitored, and the case where the ambient temperature is higher or lower than a preset temperature range is detected as the predetermined state transition. The information processing program according to claim 9.   10. The information processing according to claim 9, wherein the second step stores the date and time information output by the time measuring unit before the device transits to a sleep state or a shutdown state in the storage unit. program.

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