JP5497610B2 - Electronic device and clock frequency correction method for internal clock - Google Patents

Description

  The present invention relates to an electronic device and a clock frequency correction method for an internal clock, and more particularly to an electronic device that performs time management using a clock provided therein and a clock frequency correction method for the internal clock.

  An electronic device incorporating an internal clock (Real Time Clock (RTC)) such as an information processing apparatus, an image processing apparatus, or a copying apparatus is configured to display a time or specify an operation at a specified time based on the internal clock. Time management such as log management is performed.

  This internal clock keeps time based on a preset clock frequency. However, the set clock frequency varies depending on the ambient temperature. FIG. 2 shows an example of a state (PPM (pulse / minutes)) of the clock frequency of the internal clock with respect to the ambient temperature (° C.). When the ambient temperature is 25 ° C., the clock frequency does not vary. The variation of the clock frequency is small between 20 ° C and 25 ° C and between 25 ° C and 30 ° C. At other temperatures, the clock frequency varies greatly. Therefore, the internal clock has a characteristic that an error occurs in the time when it is operated for a long time in a temperature environment other than the reference temperature range (in this case, between 20 ° C. and 30 ° C.).

  An electronic device provided with an internal clock includes a cooling device that cools the electronic device, and a management package that controls the entire electronic device (hereinafter, the package is referred to as PKG). The internal clock is mounted on the management PKG. When this electronic device is in an operating state, both the cooling device and the management PKG are operating. On the other hand, when this electronic device is in a standby state, the cooling device is stopped. However, even in this state, the management PKG is operating to control the entire electronic device. For this reason, the management PKG is at a high temperature because the cooling device is stopped in the standby state. At this time, the internal clock mounted on the management PKG also becomes high in temperature, causing an error in the clock frequency of the internal clock and causing an error in the display time and the time used for time management. Therefore, it is necessary to correct the clock frequency error. Then, the correction of the error in the clock frequency of the internal clock is performed by the operator setting an appropriate clock frequency in the internal clock of the electronic device at the appropriate time or when the operation of the electronic device is started. For this reason, there is a problem that it takes time to correct the error of the clock frequency of the internal clock.

  On the other hand, Patent Document 1 discloses an electronic device in which when a time error is detected, a correct time is acquired and set from the outside.

  The electronic device disclosed in Patent Document 1 includes two RTCs, a main RTC and a sub RTC, in places where operating environments are different, such as places that are easily affected by heat or places that are not easily affected by heat. The CPU reads and compares the times indicated by the two RTCs, and determines that there is an error if the difference between the two values is greater than a predetermined reference value. When it is determined that there is an error, the correct time is acquired from the outside (for example, from a server or website that provides the time connected to the network), and set in the main RTC and sub RTC.

  However, since the electronic device disclosed in Patent Document 1 acquires the correct time from the outside in order to set the correct time when an error in the time is detected, a device that provides the correct time to the outside is necessary. There is a problem of becoming.

  In addition, since the electronic device disclosed in Patent Document 1 uses the time difference between the two RTCs when detecting an error in time, if both the temperature environments of the two RTCs deteriorate, the time Therefore, even if the main RTC indicates an abnormal time, this abnormal state cannot be detected. For this reason, there is a problem that the correct time cannot be set.

  Furthermore, the electronic device disclosed in Patent Document 1 uses the time difference between the two RTCs when detecting the time error, so that when the sub RTC fails, the time error is normal. Since it cannot be detected, this abnormal state cannot be detected even if the main RTC indicates an abnormal time. For this reason, there is a problem that the correct time cannot be set.

JP 2008-164524 A

  In the electronic device described above, the operator corrects the clock frequency error of the internal clock by setting an appropriate clock frequency for the internal clock of the electronic device. For this reason, there is a problem that it takes time to correct the error of the clock frequency of the internal clock.

  In addition, when the above-described electronic device detects a time error, it obtains the correct time from the outside in order to set the correct time in the RTC, so that an apparatus that provides the correct time to the outside is required. There's a problem.

  In addition, since the electronic device described above uses the difference in time between the two RTCs when detecting an error in time, there is no error in time when the temperature environment of the two RTCs deteriorates. For this reason, even if the main RTC indicates an abnormal time, this abnormal state cannot be detected, and thus there is a problem that the correct time cannot be set in the main RTC.

  Further, since the electronic device described above uses the time difference between the two RTCs when detecting the time error, the time error cannot be normally detected when the sub RTC fails. For this reason, even if the main RTC indicates an abnormal time, this abnormal state cannot be detected, and thus there is a problem that the correct time cannot be set in the main RTC.

  The objective of this invention is providing the clock frequency correction method of the electronic device and internal clock which solve the said subject.

  A first electronic device according to the present invention is a first internal device that measures time based on a preset clock frequency and is used for time management of the electronic device in an electronic device that performs time management with a clock provided therein. A timepiece, a plurality of second internal clocks that respectively measure time based on a preset clock frequency, a first temperature sensor that measures the temperature of the first internal clock, and a plurality of the second timepieces A plurality of second temperature sensors that respectively measure the temperature of the internal clock, and when the temperature data measured by the first temperature sensor is not within a predetermined reference temperature range, the plurality of the second temperature sensors The current clock frequency of the second internal clock corresponding to the temperature data closest to a predetermined reference temperature among the temperature data measured by the temperature sensor is reset in the first internal clock. There.

  The clock frequency correction method for an internal clock according to the present invention is a first internal frequency clock used for time management of the electronic device in the clock frequency correction method for an internal clock used in an electronic device that performs time management with a clock provided therein. The clock measures time based on the clock frequency preset in the clock, and the plurality of second internal clocks measure time based on the clock frequency preset in these clocks, respectively. The temperature sensors measure the temperature of the first internal timepiece, measure the temperatures of the plurality of second internal timepieces using the plurality of second temperature sensors, and obtain temperature data from the first temperature sensor. To determine whether the temperature data is within a predetermined reference temperature range. If the temperature data is not within the reference temperature range, a plurality of second temperature sensors are detected. Each of the temperature data is acquired, the temperature data is compared with the reference temperature, and the current time of the watch is determined from the second internal clock corresponding to the second temperature sensor indicating the temperature data closest to the reference temperature. The clock frequency is acquired, and this clock frequency is reset to the first internal clock.

  A second electronic device of the present invention has a management PKG for controlling the entire electronic device including an internal clock used for time management of the electronic device, and has a plurality of configurations having the same configuration as the electronic device. In an electronic device connected to another electronic device, the management PKG includes the internal clock that measures time based on a preset clock frequency, and a temperature sensor that measures the temperature of the internal clock. The temperature data measured by the temperature sensor is checked to determine whether it falls within a predetermined reference temperature range. If the temperature data does not fall within the reference temperature range, a plurality of other devices connected to the electronic device From the electronic devices, the temperature data measured by the respective temperature sensors provided in the management PKG of these electronic devices are received, and the plurality of other electronic devices are received. The other electronic device that has received the temperature data closest to a predetermined reference temperature is selected from among the devices, and the internal clock provided in the management PKG of the other electronic device is selected from the selected other electronic device. In response to the current clock frequency, the clock frequency is reset in the internal clock of the electronic apparatus.

  According to the present invention, when the temperature data of the temperature sensor provided in the management PKG is not within the predetermined reference temperature range, the plurality of temperature sensors provided in each of the plurality of PKGs different from the management PKG are measured. The PKG corresponding to the temperature data closest to the predetermined reference temperature is selected from the selected temperature data, and the current clock frequency of the internal clock in the selected PKG is reset to the internal clock of the management PKG.

  For this reason, according to the present invention, the error of the clock frequency of the internal clock is automatically corrected, so that it is not troublesome to correct the error of the clock frequency. Further, the present invention resets the current clock frequency of the internal clock provided in a plurality of PKGs different from the management PKG to the internal clock of the management PKG according to the present invention, and therefore provides an apparatus for providing the correct time to the outside. Is not necessary.

  Furthermore, the PKG corresponding to the temperature data closest to the predetermined reference temperature among the temperature data measured by the plurality of temperature sensors respectively provided in the plurality of PKGs different from the management PKG according to the present invention is provided. Since the current clock frequency of the internal clock is reset to the internal clock of the management PKG according to the present invention, the temperature environment has not deteriorated or has failed, and the PKG of the PKG different from the management PKG according to the present invention As long as there is an internal clock, the clock frequency of the management PKG according to the present invention can be reset with no or small fluctuation.

It is a figure which shows an example of the electronic device which concerns on the 1st Embodiment of this invention. It is a figure which shows an example of the fluctuation state of the clock frequency of the internal timepiece with respect to ambient temperature. It is a figure which shows an example of the electronic device which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows an example of the operation | movement of the 2nd Embodiment of this invention. It is a figure which shows an example of the electronic device which concerns on the 3rd Embodiment of this invention.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an example of an electronic apparatus according to the first embodiment of the present invention.

  The electronic device 1 according to the present embodiment includes a first internal clock 3 (Real Time Clock (RTC)), a plurality of second internal clocks 4, a first temperature sensor 5, and a plurality of second clocks. The temperature sensor 6 and the control unit 2 are used. The electronic apparatus 1 performs time management such as time display, operation designation at a designated time, log management, and the like based on the time measured by the first internal clock 3.

  A predetermined clock frequency is set in advance for the first internal clock 3 and the plurality of second internal clocks 4. The first internal clock 3 and the plurality of second internal clocks 4 measure time based on the clock frequency. In addition, the plurality of second internal clocks 4 are set at different locations from the setting location of the first internal clock 3 in the electronic device 1.

  These internal clocks have the following characteristics as described in the “Background Art” section. That is, the internal clock measures time based on a preset clock frequency, but the set clock frequency varies depending on the ambient temperature. As shown in FIG. 2, there is no variation in the clock frequency when the ambient temperature is 25 ° C. The variation of the clock frequency is small between 20 ° C and 25 ° C and between 25 ° C and 30 ° C. At other temperatures, the clock frequency varies greatly. For this reason, if this internal timepiece is operated for a long time in a temperature environment other than the reference temperature range (in this case, between 20 ° C. and 30 ° C.), an error occurs in the time that is counted.

  The first temperature sensor 5 measures the temperature of the first internal timepiece 3.

  The plurality of second temperature sensors 6 measure the temperatures of the plurality of second internal clocks 4 respectively.

  The control unit 2 resets the clock frequency of the first internal timepiece 3 based on the temperature data of the first temperature sensor 5 and the plurality of second temperature sensors 6.

  Next, the operation of electronic device 1 according to the present embodiment will be described.

  The control unit 2 acquires temperature data from the first temperature sensor 5 and periodically determines whether or not the temperature data is within a predetermined reference temperature range (for example, between 20 ° C. and 30 ° C.). (For example, once an hour, once a day, etc.). When the temperature is not within the reference temperature range, the variation in the clock frequency of the first internal timepiece 3 is large as shown in FIG. For this reason, if this internal clock is operated for a long time in this temperature environment, there is a possibility that an error occurs in the time to be measured. For this reason, the clock frequency of the first internal clock 3 is reset as follows.

  That is, the control unit 2 acquires temperature data from each of the plurality of second temperature sensors 6, and compares these temperature data with a predetermined reference temperature (for example, 25 ° C.). Then, temperature data closest to the reference temperature is extracted. At this time, if the temperature data is not within the reference temperature range, the process ends as an abnormality. When the temperature data is within the reference temperature range, the current clock frequency of the second internal clock 4 is acquired from the second internal clock 4 corresponding to the temperature data. As shown in FIG. 2, the acquired clock frequency has no fluctuation or little fluctuation. A clock frequency with no or small fluctuation is reset in the first internal clock 3.

  As described above, according to the first embodiment of the present invention, when the temperature data of the first temperature sensor 5 does not fall within the predetermined reference temperature range, the temperature measured by the plurality of second temperature sensors 6. The current clock frequency of the second internal clock 4 corresponding to the temperature data closest to the predetermined reference temperature in the data is reset to the first internal clock 3.

  For this reason, according to the first embodiment of the present invention, the error of the clock frequency of the first internal timepiece 3 is automatically corrected, so that it does not take time to correct the error of the clock frequency. Further, according to the first embodiment of the present invention, the current clock frequency of the second internal clock 4 is reset to the first internal clock 3, so that a device for providing the correct time to the outside is required. do not become.

  Furthermore, according to the first embodiment of the present invention, the second internal clock 4 corresponding to the temperature data closest to the predetermined reference temperature among the temperature data measured by the plurality of second temperature sensors 6. Since the current internal clock frequency is reset to the first internal clock 3, if there is a second internal clock 4 in which the temperature environment has not deteriorated or has failed, the first internal clock 3 It is possible to reset the clock frequency with no fluctuation or small fluctuation.

  FIG. 3 is a diagram illustrating an example of an electronic apparatus according to the second embodiment of the present invention.

  The electronic device 7 according to the present embodiment includes a management PKG 8 that controls the entire electronic device 7 and a plurality of PKGs 9 different from the management PKG 8. A plurality of PKGs 9 other than the management PKG8 are set at different locations from the setting location of the management PKG8.

  The management PKG 8 includes a first internal clock 10 (Real Time Clock (RTC)), a first temperature sensor 11, a reference temperature comparison unit 12, and a frequency correction unit 13.

  The electronic device 7 performs time management such as time display, operation designation at a designated time, log management, and the like based on the time measured by the first internal clock 10.

  A plurality of PKGs 9 other than the management PKG 8 includes a plurality of second internal clocks 14 and a plurality of second temperature sensors 15, respectively.

  A predetermined clock frequency is set in advance for the first internal clock 10 and the plurality of second internal clocks 14. The first internal clock 10 and the plurality of second internal clocks 14 measure time based on the clock frequency. These internal clocks are the same as those described in the first embodiment, and have a characteristic that an error occurs in the time when the clock is operated for a long time in a temperature environment other than the reference temperature range.

  The first temperature sensor 11 measures the temperature of the first internal timepiece 10.

  The plurality of second temperature sensors 15 measure the temperatures of the plurality of second internal clocks 14 respectively.

  The reference temperature comparison unit 12 acquires temperature data from the first temperature sensor 11, and determines whether or not the temperature data is within a predetermined reference temperature range (for example, between 20 ° C and 30 ° C). Check regularly (for example, once an hour, once a day, etc.). When the temperature is not within the reference temperature range, temperature data is acquired from the plurality of second temperature sensors 15 provided in the plurality of PKGs 9 different from the management PKG 8, and the temperature data and the reference temperature (for example, 25 ° C) are obtained. ) And a PKG 9 having a temperature sensor indicating temperature data closest to the reference temperature is selected.

  The frequency correction unit 13 acquires the current clock frequency of the internal clock from the second internal clock 14 mounted on the PKG 9 selected by the reference temperature comparison unit 12, and uses the clock frequency as a correction value to set the first clock of the management PKG8. The internal clock 10 is reset.

  Next, the operation of the electronic device 7 according to the present embodiment will be described in detail with reference to FIG.

  FIG. 4 is a flowchart illustrating an example of the operation of the electronic device according to this embodiment.

  In step S1 of FIG. 4, the first internal clock 10 provided in the management PKG 8 measures time based on the clock frequency preset in the internal clock. In addition, a plurality of second internal clocks 14 respectively provided in a plurality of PKGs 9 different from the management PKG 8 measure time based on clock frequencies preset in these internal clocks.

  In step S2 of FIG. 4, the temperature of the first internal clock 10 is measured by the first temperature sensor 11 provided in the management PKG 8, and a plurality of second PGS 9 provided in each of the plurality of PKGs 9 other than the management PKG 8 are provided. The temperature of each of the plurality of second internal clocks 14 is measured by the temperature sensor 15.

  In step S3 of FIG. 4, the reference temperature comparison unit 12 acquires temperature data from the first temperature sensor 11, checks whether this temperature data is in the reference temperature range, and does not enter the reference temperature range. If yes, go to Step S4. If in the reference temperature range, repeat this step periodically.

  In step S4 of FIG. 4, the reference temperature comparison unit 12 acquires temperature data from the plurality of second temperature sensors 15 and compares these temperature data with the reference temperature. Then, temperature data closest to the reference temperature is extracted. At this time, if the temperature data is not within the reference temperature range, the process ends as an abnormality. When this temperature data is within the reference temperature range, a PKG 9 having a second internal clock 14 corresponding to the second temperature sensor 15 indicating this temperature data is selected from a plurality of PKGs 9 other than the management PKG 8 To do.

  In step S5 of FIG. 4, the frequency correction unit 13 acquires the current clock frequency of the internal clock from the second internal clock 14 provided in the PKG 9 selected by the reference temperature comparison unit 12. At this time, since the temperature data closest to the reference temperature is within the reference temperature range, the acquired clock frequency has no or small fluctuation as shown in FIG. Then, the frequency correction unit 13 resets the clock frequency with no or small fluctuation as the correction value to the first internal clock 10 of the management PKG8.

  As described above, according to the second embodiment of the present invention, when the temperature data of the first temperature sensor 11 provided in the management PKG 8 does not fall within the predetermined reference temperature range, a plurality of items other than the management PKG 8 are used. The current clock frequency of the second internal clock 14 in the PKG 9 corresponding to the temperature data closest to the predetermined reference temperature among the temperature data measured by the plurality of second temperature sensors 15 respectively provided in the PKG 9 is obtained. Reset to the first internal clock 10.

  For this reason, according to the second embodiment of the present invention, since the error of the clock frequency of the first internal timepiece 10 is automatically corrected, it is not time-consuming to correct the error of the clock frequency. In addition, according to the second embodiment of the present invention, the current clock frequency of the second internal clock 14 is reset to the first internal clock 10, so that a device for providing the correct time to the outside is required. do not become.

  Furthermore, according to the second embodiment of the present invention, the second internal clock 14 corresponding to the temperature data closest to the predetermined reference temperature among the temperature data measured by the plurality of second temperature sensors 15. The current internal clock frequency is reset to the first internal clock 10, so as long as there is a second internal clock 14 in which the temperature environment has not deteriorated or has failed, the first internal clock 10 In addition, it is possible to reset the clock frequency with no or small fluctuation.

  FIG. 5 is a diagram showing an example of an electronic apparatus according to the third embodiment of the present invention.

  The electronic device 20 according to the present embodiment includes a management PKG 21 (Package) that controls the entire electronic device 20. The management PKG 21 includes an internal clock 22 (Real Time Clock (RTC)), a temperature sensor 23, a reference temperature comparison unit 24, and a frequency correction unit 25.

  The electronic device 20 is connected to a plurality of other electronic devices 26 having the same configuration as the electronic device 20. Further, the electronic device 20 performs time management such as time display, operation designation at a designated time, log management, and the like based on the time measured by the internal clock 22.

  A predetermined clock frequency is preset for the internal clock 22. The internal clock 22 measures time based on the clock frequency. The internal timepiece 22 is the same as that described in the first embodiment, and has a characteristic that an error occurs in the time when it is operated for a long time in a temperature environment other than the reference temperature range.

  The temperature sensor 23 measures the temperature of the internal clock 22.

  The reference temperature comparison unit 24 acquires temperature data from the temperature sensor 23 and periodically determines whether or not the temperature data falls within a predetermined reference temperature range (for example, between 20 ° C. and 30 ° C.). For example, once per hour, once a day, etc.). When the temperature is not within the reference temperature range, the temperature from the plurality of temperature sensors 29 respectively provided in the management PKG 27 of the plurality of other electronic devices 26 having the same configuration as that of the present electronic device 20 connected to the present electronic device 20. Acquire each data. Then, the reference temperature comparison unit 24 compares these temperature data with a reference temperature (for example, 25 ° C.), and selects another electronic device 26 including a temperature sensor 29 indicating temperature data closest to the reference temperature. select.

  The frequency correction unit 25 acquires the current clock frequency of the internal clock 28 from the internal clock 28 mounted on the management PKG 27 of the other electronic device 26 selected by the reference temperature comparison unit 24. Then, the frequency correcting unit 25 resets the acquired clock frequency as a correction value in the internal clock 22 provided in the management PKG 21 of the electronic device 20.

  As described above, the electronic device 20 according to the present embodiment replaces the plurality of PKGs 9 other than the management PKG 8 of the electronic device 7 according to the second embodiment of the present invention shown in FIG. A plurality of management PKGs 27 provided in a plurality of other electronic devices 26 having the same configuration as that of the electronic device 20 connected to the electronic device 20 are used. Then, instead of the plurality of second temperature sensors 15 and the plurality of second internal clocks 14, a plurality of temperature sensors 29 and a plurality of internal clocks 28 in the plurality of management PKGs 27 are used.

  As described above, according to each embodiment of the present invention, when the temperature data of the temperature sensor provided in the management PKG is not within the predetermined reference temperature range, each of the plurality of PKGs different from the management PKG is provided. The PKG corresponding to the temperature data closest to a predetermined reference temperature is selected from the temperature data measured by the plurality of temperature sensors provided, and the current clock frequency of the internal clock in the selected PKG is selected as the management PKG. Reset to the internal clock.

  For this reason, according to each embodiment of the present invention, since the error of the clock frequency of the internal clock is automatically corrected, it is not time-consuming to correct the error of the clock frequency. In addition, since the current clock frequency of the internal clock provided in a plurality of PKGs other than the management PKG of the electronic device according to each embodiment of the present invention is reset to the internal clock of the management PKG of the electronic device, There is no need for a device that provides the correct time.

  Furthermore, according to each embodiment of the present invention, the temperature data measured in advance by the plurality of temperature sensors respectively provided in the plurality of PKGs other than the management PKG of the electronic device according to each embodiment of the present invention is previously stored. The current clock frequency of the internal clock provided in the PKG corresponding to the temperature data closest to the determined reference temperature is acquired. Then, this clock frequency is reset in the internal clock of the management PKG of the electronic device according to each embodiment of the present invention. Therefore, as long as there is an internal clock of the PKG other than the management PKG of the electronic device according to each embodiment of the present invention in which the temperature environment has not deteriorated or failed, each embodiment of the present invention. It is possible to reset the clock frequency with no or small fluctuation in the internal clock of the electronic device management PKG.

DESCRIPTION OF SYMBOLS 1 Electronic device 2 Control part 3 1st internal clock 4 2nd internal clock 5 1st temperature sensor 6 2nd temperature sensor 7 Electronic device 8 Management PKG
9 PKG
DESCRIPTION OF SYMBOLS 10 1st internal clock 11 1st temperature sensor 12 Reference temperature comparison part 13 Frequency correction part 14 2nd internal clock 15 2nd temperature sensor 20 Electronic device 21 Management PKG
22 Internal Clock 23 Temperature Sensor 24 Reference Temperature Comparison Unit 25 Frequency Correction Unit 26 Electronic Equipment 27 Management PKG
28 Internal clock 29 Temperature sensor

Claims (10)

In an electronic device that performs time management with a clock provided inside,
A first internal clock that measures time based on a preset clock frequency and is used for time management of the electronic device;
A plurality of second internal clocks each measuring time based on a preset clock frequency;
A first temperature sensor for measuring a temperature of the first internal clock;
A plurality of second temperature sensors that respectively measure the temperature of the plurality of second internal clocks,
When the temperature data measured by the first temperature sensor is not within a predetermined reference temperature range, the temperature data closest to the predetermined reference temperature among the temperature data measured by the plurality of second temperature sensors. An electronic device, wherein a current clock frequency of the second internal clock corresponding to the second internal clock is reset to the first internal clock. A management package for controlling the entire electronic device including the first internal clock and the first temperature sensor (hereinafter, package is referred to as PKG);
A plurality of PKGs different from the management PKG, each having a plurality of second internal clocks and a plurality of second temperature sensors;
The electronic apparatus according to claim 1, further comprising: The management PKG
When the temperature data measured by the first temperature sensor is not within a predetermined reference temperature range, temperature data is obtained from each of the plurality of second temperature sensors, and the temperature data and the reference temperature are obtained. And a reference temperature comparison unit that selects the PKG including the second temperature sensor indicating temperature data closest to the reference temperature;
The current clock frequency of the timepiece is acquired from the second internal clock mounted on the PKG selected by the reference temperature comparison unit, and the clock frequency is reset to the first internal clock of the management PKG. A frequency correction unit to perform,
The electronic apparatus according to claim 2, further comprising:   Detection that the temperature data measured by the first temperature sensor is not within the predetermined reference temperature range, and the first internal of the clock frequency when the temperature data is not within the reference temperature range The electronic device according to claim 1, wherein resetting to a clock is performed periodically. In the method of correcting the clock frequency of an internal clock used in an electronic device that performs time management with a clock provided inside,
The first internal clock for use in time management of the electronic device measures time based on a clock frequency preset in the clock,
A plurality of second internal clocks each measure time based on a clock frequency preset in these clocks,
The temperature of the first internal clock is measured by a first temperature sensor;
The plurality of second temperature sensors respectively measure the temperature of the plurality of second internal clocks,
Temperature data is acquired from the first temperature sensor, and it is checked whether or not the temperature data is within a predetermined reference temperature range. If the temperature data is not within the reference temperature range, a plurality of second temperature sensors are used. Each temperature data is acquired, and these temperature data and the reference temperature are compared,
Obtaining the current clock frequency of the watch from the second internal clock corresponding to the second temperature sensor indicating temperature data closest to the reference temperature;
Reset the clock frequency to the first internal clock;
A method for correcting the clock frequency of an internal clock. The first internal clock and the first temperature sensor are provided in a management PKG that controls the entire electronic device,
6. The clock frequency correction method for an internal clock according to claim 5, wherein the plurality of second internal clocks and the plurality of second temperature sensors are provided in a plurality of PKGs different from the management PKG. .   Detection that the temperature data measured by the first temperature sensor is not within the predetermined reference temperature range, and the first internal of the clock frequency when the temperature data is not within the reference temperature range 7. The clock frequency correction method for an internal clock according to claim 5, wherein the resetting to the clock is performed periodically. An electronic device having a management PKG for controlling the entire electronic device having an internal clock used for time management of the electronic device and connected to a plurality of other electronic devices having the same configuration as the electronic device ,
The management PKG includes the internal clock that measures time based on a preset clock frequency, and a temperature sensor that measures the temperature of the internal clock, and temperature data measured by the temperature sensor is predetermined. It is checked whether the temperature data is within the reference temperature range. If the temperature data is not within the reference temperature range, a plurality of other electronic devices connected to the electronic device can be used for management PKG of these electronic devices. Receiving each temperature data measured by each temperature sensor provided, select the other electronic device that has received the temperature data closest to a predetermined reference temperature from among the plurality of other electronic devices, The current clock frequency of the internal clock provided in the management PKG of the other electronic device is received from the selected other electronic device, To reset the clock frequency to the internal clock of the electronic equipment,
An electronic device characterized by that. The management PKG
If the temperature data does not fall within a predetermined reference temperature range, each temperature sensor provided in the management PKG of these other electronic devices from a plurality of the other electronic devices connected to the electronic device Receiving each measured temperature data, comparing the temperature data with the reference temperature, and selecting the other electronic device that received the temperature data closest to the reference temperature from among the plurality of other electronic devices A reference temperature comparison unit,
The current clock frequency of the internal clock provided in the management PKG of the other electronic device is received from the other electronic device selected by the reference temperature comparison unit, and this clock frequency is received as the internal clock of the management PKG. A frequency correction unit to be reset to
9. The electronic device according to claim 8, further comprising:   Detecting that the temperature data measured by the temperature sensor is not within the predetermined reference temperature range, and resetting the clock frequency to the internal clock when the temperature data is not within the reference temperature range; 10. The electronic device according to claim 8, wherein the electronic device is periodically performed.

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