WO2014147726A1 - Dispositif de traitement d'informations, procédé de traitement d'informations, et programme de traitement d'informations - Google Patents

Dispositif de traitement d'informations, procédé de traitement d'informations, et programme de traitement d'informations Download PDF

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Publication number
WO2014147726A1
WO2014147726A1 PCT/JP2013/057720 JP2013057720W WO2014147726A1 WO 2014147726 A1 WO2014147726 A1 WO 2014147726A1 JP 2013057720 W JP2013057720 W JP 2013057720W WO 2014147726 A1 WO2014147726 A1 WO 2014147726A1
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Prior art keywords
processing
information
condition
environment
unit
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PCT/JP2013/057720
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English (en)
Japanese (ja)
Inventor
章典 西家
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富士通株式会社
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Priority to JP2015506409A priority Critical patent/JP5950024B2/ja
Priority to PCT/JP2013/057720 priority patent/WO2014147726A1/fr
Publication of WO2014147726A1 publication Critical patent/WO2014147726A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/30—Monitoring
    • G06F11/3058—Monitoring arrangements for monitoring environmental properties or parameters of the computing system or of the computing system component, e.g. monitoring of power, currents, temperature, humidity, position, vibrations
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/30—Monitoring
    • G06F11/3003—Monitoring arrangements specially adapted to the computing system or computing system component being monitored

Definitions

  • the disclosed technology relates to an information processing apparatus, an information processing method, and an information processing program.
  • the information processing apparatus includes a plurality of processing units such as devices having functions, and performs processing such as processing information in each processing unit and exchanging information between processing units.
  • the processing load of the processing unit may fluctuate due to the influence of changes in the surrounding environment such as temperature, or the processing speed of the processing unit or the time required for information transmission / reception of the processing unit may fluctuate.
  • CMOS devices that process information using a high-speed clock signal
  • the processing load and the processing speed of the processing unit that processes in synchronization with the input clock signal fluctuate due to the influence of environmental changes such as temperature, and the time of information exchange between the processing units fluctuates.
  • environmental changes such as temperature
  • time of information exchange between the processing units fluctuates.
  • a phase adjustment technique that gives a delay when data synchronized with a clock is input to the processing unit is known.
  • an information processing device is provided with a phase adjustment circuit, and when the information processing device is installed, a setting value suitable for the installation environment is set in the phase adjustment circuit among the setting values for phase adjustment obtained before shipment.
  • the technology to do is known.
  • the set value for phase adjustment measures the set value for phase adjustment at each temperature by varying the temperature while operating the information processing device with a constant power supply voltage in a temperature-controlled room or the like before shipment of the information processing device. Further, when the information processing apparatus is operated with the power supply voltage changed from a constant power supply voltage, the temperature is changed to measure a set value for phase adjustment at each temperature.
  • the measured setting value for phase adjustment is associated with the power supply voltage and temperature, and stored in the information processing apparatus as a setting table for phase adjustment.
  • the installation environment based on the power supply voltage and temperature is measured, and the setting value for phase adjustment for the power supply voltage and temperature that matches the installation environment is specified from the setting table for phase adjustment.
  • Setting of the phase adjustment circuit of the information processing apparatus is executed based on the specified setting value for phase adjustment.
  • the setting value for phase adjustment is frequently reset according to the change in the installation environment of the information processing apparatus. If the setting value for phase adjustment is frequently reset in the information processing apparatus, a problem may occur in the information processing apparatus. For example, in an information processing apparatus including a processing unit that is required to be initialized when setting a setting value for phase adjustment, when the setting value for phase adjustment is frequently reset, the processing unit is initialized. The operation of the information processing apparatus may be stopped.
  • the objective is to improve the operating performance of the device.
  • the storage unit includes processing conditions that can be processed by the processing unit in each of the plurality of environments in the environment information indicating each of the plurality of environments of the apparatus including the processing unit that processes the information according to the predetermined processing conditions.
  • a table in which condition width information indicating the width of each is associated is stored. Based on the table, the control unit executes control for adjusting the predetermined processing condition such that the predetermined processing condition is included in the condition width information corresponding to the environment information indicating the environment of the current apparatus.
  • the operating performance of the apparatus can be improved.
  • FIG. 18 is a block diagram illustrating an example of a case where the information processing apparatus is realized by a computer. It is an image figure which shows an example of a table.
  • firmware function It is explanatory drawing of a firmware function. It is a flowchart which shows an example of the flow of the process performed with firmware. It is a flowchart which shows an example of the flow of the process which produces a table. It is a flowchart which shows an example of the flow of a process which confirms the process condition width
  • FIG. 1 shows a configuration of an information processing apparatus 100 according to a comparative example.
  • the information processing apparatus 100 includes a processing unit 104 and a memory 108.
  • the processing unit 16 is a processing unit that executes a predetermined process known by an LSI (Large Scale Integrated circuit) or the like, and a processing condition for executing the process may vary depending on the environment of the apparatus. Therefore, before the information processing apparatus 100 is shipped, the optimum processing condition 110 corresponding to the environment of the apparatus is investigated by the investigation unit 114 and stored in the memory 108. In the operation after the information processing apparatus 100 is installed, the controller 106 operates the processing unit 104 based on the optimum processing condition 110 stored in the memory 108 corresponding to the environment detected by the sensor 102.
  • LSI Large Scale Integrated circuit
  • FIG. 2 shows an example of the flow of processing for storing the optimum processing condition 110 corresponding to the environment before shipment of the information processing apparatus 100 according to the comparative example.
  • FIG. 3 shows an example of the flow of operation processing after the installation of the information processing apparatus 100 according to the comparative example.
  • the processing condition 110 is stored in the memory 108 (see FIG. 2). That is, the information processing apparatus 100 is installed in the thermostat 112, and the optimal processing condition of the processing unit 104 of the information processing apparatus 100 in a state where the environment such as temperature and voltage is changed is investigated by the investigation unit 114 (FIG. Step 120 shown in FIG.
  • the investigation unit 114 stores the optimum processing condition 110 corresponding to the environment such as temperature and voltage, which is the investigation result, in the memory 108 (step 122 shown in FIG. 2). Accordingly, the memory 108 stores information indicating the optimum processing condition 110 corresponding to the information indicating the environment.
  • the processing unit 104 is operated based on the optimum processing condition 110 stored in the memory 108 corresponding to the environment (see FIG. 3). ). That is, when the information processing apparatus 100 is installed and the operation is started (step 130 shown in FIG. 3), the controller 106 monitors the internal environment indicated by the voltage and temperature by the sensor 102 (see FIG. 3). Step 132 shown). When the internal environment changes (when affirmative determination is made at step 134 shown in FIG. 3), the optimum processing condition 110 corresponding to the changed internal environment is extracted from the memory 108 (step 136 shown in FIG. 3). processing). The controller 106 sets the extracted processing condition 110 in the information processing apparatus 100 (processing in step 138 shown in FIG. 3). Until the operation of the information processing apparatus 100 ends (until an affirmative determination is made in step 140 shown in FIG. 3), the controller 106 sets the optimum processing condition 110 corresponding to the in-apparatus environment and operates the processing unit 104.
  • the processing unit 104 since the processing unit 104 is operated based on the optimum processing condition 110 stored in the memory 108, the operation of the information processing apparatus 100, that is, whenever the environmental change occurs, that is, There is a case where the operation of the processing unit 104 is hindered.
  • the optimal processing condition 110 is set and the processing unit 104 is restarted each time an environmental change occurs. Therefore, the operation of the information processing apparatus 100 may be temporarily stopped every time an environmental change occurs.
  • a table is used in which information indicating the processing condition width that does not hinder the operation of the processing unit is associated with environmental information indicating the environment of the apparatus.
  • FIG. 4 shows the configuration of the information processing apparatus 10 according to the first embodiment.
  • the information processing apparatus 10 includes an environment change unit 12, a detection unit 14, a processing unit 16, a creation unit 18, a control unit 20, and a storage unit 22.
  • a heat source 12HC for changing the device environment related to temperature and a power source 12V for changing the device environment related to power supply voltage are included.
  • the heat source 12HC can include a heat generator that heats the device environment with a heater or the like, and a cooling body that cools the device environment with a fan or the like.
  • the power supply 12V can be a power supply voltage variable type power supply.
  • Detecting unit 14 detects the environment of the device at a certain time. For example, when the information processing apparatus 10 is operating, an environment of a processing unit described later included in the information processing apparatus 10 or included in the information processing apparatus 10 is detected.
  • An example of the environment of the apparatus is an environment in which at least one of temperature and power supply voltage is in a steady state.
  • the disclosed technique is not limited to an environment based on temperature and voltage. .
  • the processing conditions corresponding to the environment at least one of humidity and atmospheric pressure may be used, and at least one of humidity and atmospheric pressure may be added to the temperature.
  • current or power may be used.
  • the processing unit 16 is a processing unit that executes a predetermined process known by an LSI or the like.
  • the processing unit 16 may change processing conditions when executing processing according to the environment of the apparatus.
  • the processing condition there is a parameter related to setting of a delay time or the like in an interface set for the processing unit 16 to exchange information.
  • the processing conditions of the processing unit 16 are set according to the changing environment.
  • the processing conditions corresponding to the environment of an arbitrary apparatus have optimum values.
  • the processing unit 16 can operate optimally depending on the processing conditions of the optimal value, but there are cases where there is no problem in the operation of the processing unit 16 even if the processing conditions deviate from the optimal value. Therefore, in the present embodiment, the storage unit 22 stores a table 26 in which information indicating the processing condition width that does not hinder the operation of the processing unit 16 is associated with environmental information indicating the environment of the apparatus. Further, the storage unit 22 stores the processing conditions 22 of the processing unit 16 corresponding to the environment of the apparatus, which is used when the information processing apparatus 10 is operating.
  • the creation unit 18 creates a table 26 in which each of the changing device environments is associated with the processing condition width, and stores the table 26 in the storage unit 22.
  • the control unit 20 executes control to set the processing condition of the processing unit 16 according to the changing environment while referring to the processing condition 24 and the table 26 when the information processing apparatus 10 is in operation.
  • FIG. 5 shows a processing flow of the information processing apparatus 10 according to the first embodiment.
  • the operation preparation process (the process of step 210) is executed in the creation unit 18 before the apparatus is operated.
  • a table 26 is created in which information on the processing condition width is associated with each piece of information indicating an environment that varies in the installation environment of the apparatus. That is, when the creation unit 18 instructs the environment changing unit 12, the environment changing unit 12 forcibly changes the environment.
  • the creation unit 18 acquires the processing condition width of the processing unit 16 in the changed environment, and stores the acquired information indicating the processing condition width of the processing unit 16 in the table 26 in association with the information indicating the changed environment. .
  • the processing condition 24 of the processing unit 16 in the current environment is set.
  • the table 26 information on the processing condition width is associated with each piece of information indicating an environment, and when the operation preparation process is completed, the table 26 can be used as a table 26 suitable for the installation environment of the information processing apparatus 10.
  • the normal operation process (the process of step 220) is executed in the control unit 20 until the environment changes (until an affirmative determination is made in step 230).
  • the processing unit 16 is operated according to the processing conditions 24 that have been set.
  • the control unit 20 performs a correction process (in Step 240) that controls the setting for the processing condition 24 of the processing unit 16 based on the environmental information detected by the detection unit 14. Process).
  • step 240 the process returns to the process of step 220 and the normal operation process and the correction process are executed until the operation of the information processing apparatus 10 is completed (Yes in step 250).
  • the optimum processing condition 24 is not set every time an environmental change occurs, and the operation is not hindered.
  • the processing condition 24 can be used continuously. Therefore, the number of restarts of the processing unit 16 can be suppressed.
  • the information processing apparatus 10 stores the information indicating each environment as a table 26 in association with the processing condition width corresponding to the environment before operation in the environment where the apparatus is installed. Therefore, it is possible to reduce the processing for investigating the processing condition 24 in a special test environment such as a thermostatic chamber before the information processing apparatus 10 is shipped. Further, even if the environment before shipment differs from the installation environment, the processing unit 16 with processing conditions suitable for the environment in which the information processing apparatus 10 is installed is created in order to create the table 26 in the environment in which the apparatus is installed. Can be executed.
  • FIG. 6 shows an example when the information processing apparatus 10 is realized by the computer 30.
  • the computer 30 includes a CPU 32, a memory 34, and a nonvolatile storage unit 44.
  • the CPU 32, the memory 34, and the storage unit 44 are connected to each other via a bus 43.
  • the storage unit 44 can be realized by an HDD or a flash memory.
  • the computer 30 includes a communication control unit 42 for connecting to a network, and the communication control unit 42 is connected to a bus 43.
  • the computer 30 includes a display device 36 as an example of an output device, and an input device 38 as an example of an input device such as a keyboard and a mouse.
  • the display device 36 and the input device 38 are connected to the bus 43.
  • the computer 30 is provided with a device (R / W device) 40 to which a recording medium 39 such as an optical disk is mounted and which reads / writes from / to the mounted recording medium 39.
  • the R / W device 40 is connected to the bus 43.
  • the display device 36, the input device 38, and the R / W device 40 may be omitted, or may be connected to the bus 43 as necessary.
  • the storage unit 44 stores an OS 45 and a driver 46. Note that the OS 45 and the driver 46 are well-known technologies, and thus detailed description thereof is omitted.
  • the computer 30 includes a table memory 56 for storing a table 58 as the table 26 shown in FIG.
  • the computer 30 includes a firmware memory 48.
  • the firmware memory 48 stores a creation process 50 and a control process 52, and includes a storage area 54 for storing information indicating an initial environment value.
  • the computer 30 operates as the creation unit 18 illustrated in FIG.
  • the control process 52 stored in the firmware memory 48 operates as the control unit 20 shown in FIG.
  • the computer 30 includes LSIs 62 and 64 as the processing unit 16.
  • the LSIs 62 and 64 can exchange information with each other via the interface 63.
  • the LSIs 62 and 64 can determine a delay time according to the environment as a processing condition when the information is exchanged via the interface 63.
  • the LSIs 62 and 64 can set a delay time as a processing condition inside.
  • the LSIs 62 and 64 exchange information, one becomes a transmitting device and the other becomes a receiving device. Therefore, the LSIs 62 and 64 exchange information via the interface 63 according to the delay time set inside.
  • the LSI 62 functions as a transmission-side device and the LSI 64 functions as a reception-side device
  • data from the transmission-side device is received with a delay of a delay time set in the LSI 64 that is the reception-side device.
  • the LSIs 62 and 64 can exchange information appropriately.
  • the processing condition can be set for at least one of the transmitting device and the receiving device.
  • the LSIs 62 and 64 can be set to the adjustment mode in order to investigate the processing conditions when exchanging information with each other.
  • the LSIs 62 and 64 are connected to the adjustment unit 60, and an instruction for setting an adjustment mode is executed for the LSIs 62 and 64 in accordance with an instruction from the adjustment unit 60.
  • the adjustment unit 60 is connected to the bus 43 and functions as firmware 72 (see FIG. 8) in cooperation with the process execution function stored in the firmware memory 48, as will be described in detail later. Examples of the adjustment unit 60 include FPGA (Field Programmable Read Only Memory) and CPLD (Complex Programmable Logic Device).
  • the computer 30 includes a power supply 66 that can change the power supply voltage as the power supply 12V of the environment changing unit 12, and the power supply 66 is connected to the adjusting unit 60. Further, the computer 30 includes a heat source 68 as the heat source 12 HC of the environment changing unit 12, and the heat source 68 is connected to the adjusting unit 60.
  • the heat source 68 includes a heating element 68H that heats the apparatus environment with a heater or the like, and a cooling body 68C that cools the apparatus environment with a fan or the like.
  • the computer 30 also includes a detector 70 as the detection unit 14, and the detector 70 is connected to the adjustment unit 60.
  • the detector 70 includes a voltage sensor 70V for detecting the power supply voltage and a temperature sensor 70HC for detecting the temperature.
  • FIG. 7 shows an example of the table 58 stored in the table memory 56.
  • each piece of information indicating each environment is associated with a processing condition width corresponding to each environment.
  • the name of the window width is shown as the processing condition width.
  • the processing condition width (window width) of the set value is +2 to 12 It shows that it is a delay time width. In the first embodiment, a delay time when information is exchanged between the LSIs 62 and 64 is used as a processing condition.
  • the processing condition width (window width) of the set value is +3 to 13. Show.
  • information indicating that the environment is forcibly changed by the power supply setting by the POL (PontPOOf Load) setting by the power supply 66 is stored.
  • the processing condition width (window width) of the set value is +1 to 11 Is shown. It should be noted that the remarks indicate that the device environment was forcibly cooled by adjusting the rotation speed of the fan as an example of the cooling body 68C, or the environment was changed by increasing the temperature using the heat generated by the element. Information is stored.
  • the processing condition width (window width) registered in the table 58 uses a delay time width suitable for the target device, in the first embodiment, the LSIs 62 and 64, for example, time units such as microseconds and nanoseconds. Can do.
  • FIG. 8 shows an example of a functional block diagram when the information processing apparatus 10 is realized by the computer 30 and the process stored in the firmware memory 48 is executed.
  • the CPU 32 operates as the firmware 72 by executing the creation process 50 and the control process 52 stored in the firmware memory 48 and operating the adjustment unit 60.
  • the firmware 72 includes functional units such as an environment control unit 74, an environment value acquisition unit 76, an environment comparison unit 78, a window comparison unit 80, an interface unit 82, and a main control unit 84.
  • the environment control unit 74 is a functional unit that executes control for forcibly adjusting the environment of the information processing apparatus 10, and is connected to a power source 66 and a heat source 68.
  • the control side of the environment control unit 74 is connected to the main control unit 84.
  • the environmental value acquisition unit 76 is a functional unit that acquires information indicating the environment of the information processing apparatus 10, and is connected to a detector 70 including a voltage sensor 70V and a temperature sensor 70HC.
  • the environment comparison unit 78 is a functional unit that compares the current environment of the information processing apparatus 10 with the set environment, and the storage area 54 that stores information indicating the environment initial value and the environment value acquisition unit 76 are connected to the input side. Has been.
  • the output side of the environment comparison unit 78 is connected to the main control unit 84 on the control side.
  • the window comparison unit 80 is for acquiring and comparing information indicating the processing conditions currently set from the interface unit 82 and information indicating the processing conditions included in the table 58 suitable for the current environment. Connected to the unit 82.
  • the control side of the window comparison unit 80 is connected to the main control unit 84.
  • the interface unit 82 includes a timing adjustment confirmation IF unit 84 and a table memory IF unit 86.
  • the interface unit 82 is also connected to the main control unit 84.
  • the timing adjustment confirmation IF unit 84 adjusts or confirms the processing condition width (window width) of the interface to the LSIs 62 and 64.
  • the table memory IF unit 86 updates or references the table 58 including the processing condition width (window width) in the table memory 56.
  • the main control unit 84 controls each of the environment control unit 74, the environment value acquisition unit 76, the environment comparison unit 78, the window comparison unit 80, and the interface unit 82.
  • the information processing apparatus 10 is an example of an information processing apparatus in the disclosed technology.
  • the environment change unit 12 is an example of an environment change in the disclosed technology
  • the processing unit 16 is an example of a processing unit in the disclosed technology.
  • Each of the LSIs 62 and 64 is an example of a responsible processing unit in the disclosed technology.
  • the program executed by the computer 30 is an example of an information processing program in the disclosed technology.
  • the program executed by the computer 30 is also a program for causing the computer 30 to function as an information processing apparatus according to the disclosed technology.
  • a recording medium 39 such as an optical disk recording a program for causing the computer 30 to execute processing is an example of a recording medium of the disclosed technology.
  • FIG. 9 shows a flow of processing executed by the firmware 72 for processing of the information processing apparatus 10 realized by the computer 30 (FIG. 2).
  • the firmware 72 is activated when the information processing apparatus 10 is turned on, and the processing routine shown in FIG. 9 is executed.
  • step 300 whether or not the table 58 is in an initial state where it does not exist is determined by determining whether or not the information indicating the environment is registered in the table 58 in association with the information indicating the processing condition width. To be judged. If a negative determination is made in step 300, the table 58 exists, and the process proceeds to step 308. On the other hand, if an affirmative determination is made in step 300, the process proceeds to step 302, and a table 58 creation process (details will be described later) is executed. In the process of creating the table 58 in step 302, the table 58 is created by forcibly changing the temperature and voltage and deriving the processing condition width in the changed environment.
  • processing for returning the environment of the information processing apparatus 10 to a normal state is executed.
  • An example of the environment in the normal state of the information processing apparatus 10 is an environment before execution of the creation process of the table 58 for forcibly changing the environment.
  • a temperature environment and a power supply voltage environment are used as the environment of the information processing apparatus 10.
  • the detected value of the temperature and the power supply voltage detected by the detector 70 is used as a value indicating the environment.
  • the environment in the normal state is an environment in which the detected values of the temperature and the power supply voltage detected before the process of creating the table 58 are performed.
  • step 304 the temperature and the power supply voltage are detected by the detector 70, and the processing is waited until the device environment forcibly changed by the processing in step 302 matches the environment before the table 58 creation processing. . If the waiting time until the environment forcibly changed in the process of step 302 returns to the normal environment is known, it is sufficient to wait for a predetermined fixed time.
  • the processing condition 24 that matches the current environment of the information processing apparatus 10 returned to the normal state is set.
  • the temperature and power supply voltage are detected by the detector 70, and information indicating the processing condition width corresponding to the detected temperature and power supply voltage is extracted from the table 58 stored in the table memory 56.
  • the center value of the information indicating the extracted processing condition width is set as the delay time that is the processing condition 24.
  • the current environment of the information processing apparatus 10, that is, the temperature and power supply voltage values are stored as the environment initial value 54.
  • the processes in steps 302 to 306 are operation preparation processes.
  • the table 58 shown in FIG. 7 is stored in the table memory 56 as a result of the operation preparation process shown in steps 302 to 306 above.
  • step 308 operation start processing is executed.
  • the operation start process is an initial process determined in advance when the information processing apparatus 10 is operated.
  • the environment of the information processing apparatus 10 is monitored by detecting the temperature and the power supply voltage with the detector 70.
  • it is determined whether or not there is a change in the environment by determining whether or not the temperature and power supply voltage values detected in step 310 are different from the environmental initial value 54. If the current environment value matches the initial environment value 54, a negative determination is made in step 312 and the process returns to step 310 to continue monitoring the environment of the information processing apparatus 10.
  • an affirmative determination is made in step 312 and the process proceeds to step 314.
  • the processes in steps 308 to 312 are operational processes.
  • step 314 the processing condition 24 set in step 306 is acquired, and the processing condition width (window width) suitable for the current environment is acquired from the table 58.
  • step 316 it is determined whether or not the processing condition 24 is unacceptable by determining whether or not the processing condition 24 acquired in step 314 deviates from the processing condition range. If the processing condition 24 is included in the processing condition width, a negative determination is made in step 316 and the processing returns to step 310. On the other hand, when the processing condition 24 is outside the processing condition range, an affirmative determination is made at step 316, and the process proceeds to step 318. In step 318, the center value of the processing condition width acquired in step 314 is reset as the processing condition 24, and the process proceeds to step 320.
  • step 320 it is determined whether or not an instruction to end the operation has been given by the input device 38 or the like. When the determination is negative, the process returns to step 310, and when the determination is affirmative, the processing routine is ended.
  • the processing from step 314 to step 320 is the processing condition 24 correction processing.
  • FIG. 10 shows an example of the flow of processing corresponding to the processing of step 302 shown in FIG. 9 and creating the table 58.
  • the firmware 72 executes processing for acquiring information related to the environment to be changed.
  • a temperature environment and a power supply voltage environment are used as an example of an environment to be changed in the information processing apparatus 10.
  • the information processing apparatus 10 includes a heat source 68, and heats or cools using a heating element 68 ⁇ / b> H and a cooling body 68 ⁇ / b> C included in the heat source 68.
  • heating energy can be directly applied by the heating element 68H such as a heater, and heating energy generated by the heating element 68H can be transmitted and applied using a transmitter such as a fan.
  • a transmitter such as a fan
  • the amount of energy to be applied can be controlled by controlling the rotation speed of the fan, that is, by controlling the air volume.
  • the heating energy generated in the heating element 68H can be transmitted and applied using a transmission material such as a liquid.
  • the cooling it is possible to apply the cold energy of the outside air by the cooling body 68C such as a fan as so-called air cooling, and to transmit the cold energy by using a transmission material of a liquid such as water as the so-called water cooling.
  • the amount of energy applied can be controlled by controlling the rotational speed of the fan, that is, by controlling the air volume.
  • the amount of energy applied can be controlled by controlling the supply amount of the transfer material, that is, the flow rate. Accordingly, as an example of information related to the temperature environment to be changed, there is information indicating control of the environment (air cooling control or water cooling control) by the cooling body 68C, or information indicating control of the environment (heating) by the heating element 68H.
  • the power supply voltage supplied to the processing unit 16 (LSIs 62 and 64) is directly changed, or a power supply that is changed by the transformer by providing a transformer that can change the output of the power supply voltage.
  • the voltage may be supplied to the processing unit 16 (LSIs 62 and 64).
  • the information processing apparatus 10 includes a power supply 66 that can change the power supply voltage, and the power supply voltage can be changed using the power supply 66. Accordingly, as an example of information related to the power supply voltage environment to be changed, there is information indicating control of the environment by the power supply 66 (power supply voltage control).
  • the information related to the environment to be changed is information indicating the environment in which the temperature environment and the power supply voltage environment are changed, the heating by the heating element 68H, the cooling by the cooling body 68C, and the power supply voltage by the power supply 66.
  • the information is used as information indicating environment change control.
  • the disclosed technique preferably uses a combination of information indicating heating, cooling, and power supply voltage control.
  • step 332 the environment to be changed is selected. That is, the temperature environment or the power supply voltage environment is selected from the information related to the environment to be changed acquired in step 330.
  • the environment selected in step 332 is forcibly changed.
  • the power supply voltage is incremented by 1%.
  • An instruction to the power supply 66 is executed so that is controlled.
  • the process waits until the change environment instructed to change in step 334 is reached.
  • the processing unit 16 (LSIs 62 and 64) is set to the adjustment mode. That is, in step 338, the firmware 72 outputs an instruction to set the adjustment mode to the processing unit 16 (LSIs 62 and 64).
  • the processing condition width is confirmed (details will be described later).
  • information indicating the processing condition width for the changed environment can be obtained.
  • information indicating the changed environment is associated with information indicating the processing condition width and temporarily stored. The processing in steps 334 to 342 is executed for a predetermined forced fluctuation range that is predetermined for the environment selected as the environment to be changed (first, the power supply voltage environment).
  • the power supply voltage environment uses a range of plus or minus 5% of the power supply voltage of the initial environment value, and the temperature environment is plus or minus 5 degrees of the initial environment value. Use ranges.
  • step 344 it is determined whether or not all the environments (steps 332 to 344) have been selected in the selection in step 332 for the information indicating the environment to be changed acquired in step 330. Since it is currently the selection of the power supply voltage environment and the process for the temperature environment has not been completed, a negative determination is made in step 346, the process returns to step 332, the selection of the temperature environment is executed, and the process is continued.
  • Step 346 it is determined whether or not all the environments (steps 332 to 344) have been selected in the selection in step 332 for the information indicating the environment to be changed acquired in step 330. Since it is currently the selection of the power supply voltage environment and the process for the temperature environment has not been completed, a negative determination is made in step 346, the process returns to step 332, the selection of the temperature environment is executed, and the process is continued.
  • Step 346 an affirmative determination is made in Step 346, and in Step 348, the process of creating the table 58 and storing the created table 58 in the table memory 56 is executed.
  • FIG. 11 shows an example of a processing flow for confirming the processing condition width suitable for the environment.
  • step 350 the firmware 72 instructs the transmission side device (LSI 62) to output a fixed value determined in advance for testing as transmission data.
  • an instruction is issued to forcibly change the processing condition 24 of the receiving device (LSI 64).
  • step 352 for example, the delay time when receiving information at the receiving device (LSI 64) is changed. For example, the delay time is changed step by step every time the processing in step 352 is performed.
  • step 354 When the information transfer between the LSI 62 and the LSI 64 is normal operation, an affirmative determination is made in step 354, and in step 356, a flag corresponding to the processing condition 24 changed in step 352 and indicating that normal operation has been performed is set.
  • the setting of the flag may be a process of setting (setting) an OK flag.
  • step 354 when the normal operation is not performed, a negative determination is made in step 354, and in step 358, the flag associated with the processing condition 24 changed in step 352 is reset.
  • the resetting of the flag may be a process of setting (setting) the NG flag.
  • step 360 it is determined whether or not the processing in steps 352 to 358 has been completed for a predetermined range in which the processing condition 24 can be changed.
  • step 360 may be affirmed when it is predicted that normal operation will not be performed, instead of determining the end of the process for a predetermined range in which the process condition 24 can be changed. .
  • the delay time is changed stepwise with respect to the processing condition 24 forcibly changed in step 352
  • it is detected that the flag has been reset a predetermined number of times (for example, any one of 3 to 5 times). Can make an affirmative decision.
  • step 360 If a negative determination is made in step 360, the process returns to step 352, the processing condition 24 set last time is changed to the processing condition 24 changed stepwise, and the processing is continued. On the other hand, if a positive determination is made in step 360, the range of the processing condition 24 including the processing condition 24 for which the flag is set is temporarily stored as a processing condition width. Therefore, when the processing shown in FIG. 11 is completed, the processing condition width corresponding to the environment changed in step 334 shown in FIG. 10 is derived and stored.
  • FIG. 12 shows an example of a timing chart regarding the operation of the firmware 72 in the information processing apparatus 10.
  • the firmware 72 periodically performs environmental monitoring as shown by the characteristic Tc1 (processing of step 310 shown in FIG. 9).
  • the firmware 72 checks the currently set processing condition 24 at the time indicated by the characteristic Tc3 (step 314 shown in FIG. 9).
  • the firmware 72 refers to the table 58 stored in the table memory 56 at the time indicated by the characteristic Tc4, and acquires a processing condition width suitable for the current environment (processing in step 314 shown in FIG. 9).
  • the firmware 72 when the currently set processing condition 24 is included in the processing condition width suitable for the current environment (when a negative determination is made in step 316 shown in FIG. 9), processing for maintaining the processing condition 24 Is executed. Accordingly, as indicated by the characteristic Tc5, the comparison result between the processing condition 24 and the processing condition width is not allowed to be established. Further, as indicated by the characteristic Tc6, the processing condition 24 is not reset. Therefore, at the timing indicated by time ta, the processing unit 16 (LSIs 62 and 64) can be operated under the set processing condition 24 even with the temperature and power supply voltage values detected as a fluctuating environment.
  • the characteristic Tc2 when the environment changes at the time tb, the currently set processing condition 24 is confirmed at the time indicated by the characteristic Tc3, and at the time indicated by the characteristic Tc4.
  • a processing condition range suitable for the environment is acquired.
  • processing for correcting the processing condition 24 is executed. (Step 318 shown in FIG. 9). That is, the central value of the acquired processing condition width is reset as the processing condition 24 at the time indicated by the characteristic Tc6.
  • the values of the temperature and the power supply voltage detected as a fluctuating environment indicate that the processing unit 16 (LSIs 62 and 64) is in an unpreferable state for operation under the set processing condition 24. ing.
  • the optimum processing condition 24 is set every time an environmental change occurs. Instead, the processing condition 24 can be continuously used within a range that does not hinder the operation. Therefore, the number of restarts of the processing unit 16 can be suppressed.
  • the processing condition 24 can be maintained, and the processing Execution of the resetting process for the condition 24 can be reduced. Further, even when the environment gradually fluctuates in one direction, the execution of the resetting process for the processing condition 24 can be reduced.
  • the information processing apparatus 10 stores the information indicating each environment as a table 26 in association with the processing condition width corresponding to the environment before operation in the environment where the apparatus is installed. . Therefore, it is possible to reduce the processing for investigating the processing condition 24 in a special test environment such as a thermostatic chamber before the information processing apparatus 10 is shipped. Further, even if the environment before shipment differs from the installation environment, the processing unit 16 with processing conditions suitable for the environment in which the information processing apparatus 10 is installed is created in order to create the table 26 in the environment in which the apparatus is installed. Can be executed.
  • the processing condition width for the processing unit 16 corresponding to each of the changing environments can be stored. Therefore, in the process of operating the information processing apparatus 10, even if a change occurs in the operation of the information processing apparatus 10 by exchanging or repairing some parts, a process suitable for the information processing apparatus 10 The condition range can be stored.
  • FIG. 13 shows an example in which the information processing apparatus 10 according to the second embodiment is realized by a computer 30.
  • the LSIs 62 and 64 as the processing unit 16 are provided on independent substrates (boards) 90A and 90B, respectively.
  • the LSI 62A provided on the substrate 90A is connected to the adjustment unit 60.
  • the substrate 90A is provided with a power source 66A, a heat source 68A, and a detector 70A, which are connected to the adjustment unit 60, respectively.
  • the LSI 62B provided on the substrate 90B is connected to the adjusting unit 60.
  • the substrate 90B includes a power source 66B, a heat source 68B, and a detector 70B that are connected to the adjustment unit 60, respectively.
  • the firmware memory 48 and the adjustment unit 60 provided in the information processing apparatus 10 are commonly used by the substrate 90A and the substrate 90B.
  • the processing conditions 24 are used independently for the substrate 90A and the substrate 90B. Accordingly, the table memory 56A that stores the table 58A in charge of the substrate 90A is connected to the adjustment unit 60. Similarly, a table memory 56B that stores a table 58B in charge of the substrate 90B is connected to the adjustment unit 60.
  • FIG. 14 shows an example of the table 58A stored in the table memory 56A.
  • each of the LSI 62A and the LSI 62B is either a transmission device or a reception device depending on the direction of information exchange.
  • the processing condition width is associated with the transmission device environment and the reception device environment.
  • the processing condition width (window width) ) Stores information indicating that the delay time width is +2 to 12.
  • the temperature of the transmitting device environment is 30 degrees and the voltage is increased by 1% (1.515 V) from the initial value.
  • the temperature of the receiving device environment is 30 degrees and the voltage is increased by 1% (1.515 V) from the initial value.
  • information with a processing condition width (window width) of +3 to 13 is stored.
  • the transmission device environment and the reception device environment are the same, but the transmission device environment and the reception device environment may be different.
  • Condition 24 delay time
  • the processing conditions 24 are set according to the environment when the LSIs 62 and 64 as processing units provided in each of the independent information processing apparatuses exchange information with each other via the interface 63. A case of controlling will be described.
  • 3rd Embodiment is the structure similar to 1st Embodiment, it attaches
  • FIG. 15 shows an example in which the information processing apparatus 10 is realized by the computer 30 and the information processing apparatus 10C is realized by the computer 30C as independent information processing apparatuses according to the third embodiment.
  • the configuration of the information processing apparatus 10C is the same as the elements included in the information processing apparatus 10 according to the first embodiment, and each configuration of the information processing apparatus 10C includes the information processing apparatus 10 according to the first embodiment.
  • a code in which the code “C” is added to the code of the included element is added.
  • connection line 47 capable of high-speed data communication such as a coaxial cable connected to the communication control units 42 and 42C.
  • the interface 63 is shown as information exchange between the LSI 62 and the LSI 62 ⁇ / b> C via the communication control units 42 and 42 ⁇ / b> C and the connection line 47.
  • the firmware 72, 72C functions on the transmitting side and the receiving side in each of the computer 30 and the computer 30C.
  • FIG. 16 shows a sequence flow relating to processing for exchanging information between the computer 30 and the computer 30C.
  • a table creation process in the computer 30 will be described. That is, the firmware 72 in the computer 30 can execute control for changing the environment in the computer 30 and storage of information obtained by the environment change. However, it is impossible to acquire information obtained by the control for changing the environment in the computer 30C and the environment change. Therefore, in the third embodiment, transmission / reception of control signals and transmission / reception of information are performed by communication between apparatuses using the connection line 47.
  • the firmware 72 of the computer 30 displays information indicating the environment (temperature and power supply voltage) in a normal state, that is, a state where the temperature and power supply voltage are not forcibly changed, and processing conditions (for example, a delay time at the present time) for the LSI 62. Get the information shown.
  • the acquired information is determined as the processing condition 24 of the computer 30 at the present time (processing ST01).
  • the firmware 72 transmits information for requesting provision of information indicating the environment of the computer 30C to the computer 30C by inter-device communication using the connection line 47 (processing ST02).
  • the firmware 72C of the computer 30C receives the request from the process ST02, the firmware 72C acquires information indicating the environment related to the interface of the LSI 62C, that is, the values of the temperature and the power supply voltage (process ST03).
  • the firmware 72C transmits the acquired information indicating the environment of the LSI 62C to the computer 30 by inter-device communication using the connection line 47 (processing ST04).
  • the firmware 72 of the computer 30 stores the information indicating the environment of the computer 30C to be received and the processing condition 24 determined in the processing ST01 in the table memory 56 (processing ST05). Next, the firmware 72 transmits information indicating a request for forcibly changing the environment of the computer 30C to the computer 30C by inter-device communication using the connection line 47 (processing ST06). Upon receiving the request from process ST06, the firmware 72C of the computer 30C executes a process for forcibly changing the environment of the computer 30C (process ST07). When the environment change process is performed, the firmware 72C transmits information indicating that the process for forcibly changing the environment in the computer 30C is completed (process ST08).
  • the firmware 72 of the computer 30 When the firmware 72 of the computer 30 receives the information indicating the completion of the environment change from the computer 30C, the firmware 72 acquires the processing condition 24 related to the interface of the LSI 62, for example, the delay time.
  • the firmware 72 stores information indicating the environment of the LSI 62, information indicating the environment of the LSI 62C, and the processing condition 24 in the table memory 56 (processing ST09).
  • Information indicating the processing condition width can be obtained by repeating the processing of the above processing ST06 to processing ST09. Accordingly, the firmware 72 creates the table 58 by associating the processing condition width with the information indicating the environment of the LSI 62 and the information indicating the environment of the LSI 62C, and stores the table 58 in the table memory 56 (processing ST10).
  • the firmware 72 periodically acquires information indicating the environment of the computer 30 ⁇ / b> C through inter-device communication using the connection line 47.
  • the processing condition 24 is maintained or changed by referring to the table 58 stored in the table memory 56 as in the above embodiment.
  • the fourth embodiment is a modification of the third embodiment, and controls the processing condition 24 according to the environment when information is exchanged between apparatuses by optical communication.
  • 4th Embodiment is the structure similar to 3rd Embodiment, it attaches
  • FIG. 17 shows an example in which the information processing apparatus 10 is realized by the computer 30 and the information processing apparatus 10C is realized by the computer 30C as an independent information processing apparatus according to the fourth embodiment.
  • the computer 30 includes an optical module 92 instead of the LSI 62.
  • the computer 30 includes an optical module 92C instead of the LSI 62C.
  • the difference from the third embodiment is that the delay time adjusted between the LSIs 62 and 62C in the third embodiment is the processing condition 24, whereas the fourth embodiment processes the optical level of the optical signal by the optical module. This is a condition 24.
  • the optical signal reception sensitivity on the optical signal reception side which has a large effect on information exchange, as an optical level according to environmental changes. it can.
  • the intensity (optical output level) of the optical signal on the optical signal transmission side may be adjusted to the optical level according to the environmental change. Sensitivity sensors built in the optical modules 92 and 92C can be used for detection of optical signal reception sensitivity.
  • the intensity (optical output level) of the optical signal can be adjusted by providing an attenuator (for example, an attenuator ATT) whose optical output level can be changed in the optical module on the transmission side, or supplied to the optical module on the transmission side.
  • optical module has a function capable of changing the optical output level, it is possible to change the intensity (optical output level) of the optical signal only by executing the setting change for the optical module.
  • FIG. 17 an example in which information is exchanged between the computers 30 and 30C by the interface 63 is shown.
  • information is exchanged between the computers 30 and 30C only by the interface 63.
  • the computer 30 and the computer 30C may be connected by a connection line 47 capable of high-speed data communication such as a coaxial cable so that information is exchanged.
  • FIG. 18 shows an example of a table 58 stored in the table memory 56 in the fourth embodiment.
  • each piece of information indicating each environment is associated with a processing condition width corresponding to each environment.
  • the light level is described as the processing condition width.
  • independent computers 30 and 30C can exchange information with the optical modules 92 and 92C.
  • information indicating each environment can be acquired through mutual communication by the firmware 72 and 72C, and a suitable processing condition 24 (light level) can be set.
  • the processing condition width (timing window width) on the receiving side is delayed as the processing condition 24 related to the interface between apparatuses or devices so as not to hinder the operation of the apparatus.
  • the case of adjusting with time has been described.
  • the fifth embodiment applies the disclosed technology to various parameters to be adjusted so as not to hinder the operation of the apparatus. That is, for example, the table 58 is created including information indicating transmission parameters related to the operation of the apparatus, and the processing condition correction process is executed while referring to the created table.
  • information indicating transmission parameters is used as the processing condition 24.
  • the information width or the information rate of the information indicating the transmission parameter is used as the processing condition width.
  • the information indicating the transmission parameter there is information indicating one of gain setting (amplification factor) and pole setting (peak frequency to be amplified) in the information regarding the receiving device.
  • the information regarding the transmitting device includes information indicating at least one of pre-emphasis setting (a waveform in which a waveform is amplified in advance), amplitude setting, and center voltage.
  • the information indicating the transmission parameter acquired to create the table 58 may be obtained by changing the transmission parameter when the environment is forcibly changed and acquiring the setting value at which the processing unit operates.
  • Information having a range such as amplitude setting or pre-emphasis setting may be acquired in the same manner as the processing condition width (window width).
  • the control of the processing condition 24 corresponding to the environment can be processed in consideration of the transmission quality.
  • FIG. 19 shows an example when the information processing apparatus 10 according to the sixth embodiment is realized by a computer 30.
  • the computer 30 according to the sixth embodiment includes a secondary memory 94 connected to the adjustment unit 60.
  • the secondary memory 94 there is DDR3 SDRAM (Double-Data-Rate3 Synchronous Dynamic Random Access Memory).
  • the device selection test target device is an LSI 62.
  • the target device operates normally by changing the external environment such as the external clock, power supply voltage, and temperature. Therefore, in the device selection test, an internal operation confirmation process 96A of the LSI 62, an information transfer confirmation process 96B between the LSI 62 and the CPU 32, and a reception confirmation 96C of the CPU 62 are executed.
  • the device selection test if the external environment is forcibly changed, timing correction is not performed between the CPU 32 and the secondary memory 94, so information may not be accurately transmitted to the LSI 62. There are times when you cannot continue. The reason why the device selection test cannot be continued is considered to be that the proof strength between the CPU 32 and the secondary memory 94 is small with respect to environmental fluctuations.
  • the device selection test with the LSI 62 as the target device may be executed by correcting the data transfer timing between the CPU 32 and the secondary memory 94 in some cases. Therefore, in the sixth embodiment, the correction value of the data transfer timing between the CPU 32 and the secondary memory 94 is registered in advance in the table 58 stored in the table memory 56 in association with the information indicating the environment. The timing correction value to be registered in the table 58 may be obtained by processing similar to the processing condition width (window width).
  • the case where the disclosed technology is applied to the device selection test has been described.
  • a test device that has passed the evaluation of a single device is used. Then, the table 58 may be created and tested.
  • the device selection test can be stably continued by registering in advance in the table 58 the correction values of the devices having low tolerance to environmental fluctuations.
  • a limit value that can be set in the processing condition 24 may be defined. Therefore, in the seventh embodiment, when the set value of the processing condition 24 becomes an upper limit value or a lower limit value, for example, information indicating that the limit value that can be set in the processing condition 24 is reached is notified. By providing information, it is possible to provide information that assists in exchanging devices in advance or securing a device for maintenance.
  • FIG. 20 shows a flow of processing according to the seventh embodiment. Note that FIG. 20 shows a portion in which the processing of step 370 and step 372 is added between step 314 and step 316 of the processing shown in FIG.
  • step 370 it is determined whether there is a margin in the processing condition range that can be set for environmental fluctuations. If an affirmative determination is made in step 370, the process proceeds to step 316. On the other hand, if a negative determination is made in step 370, in step 372, after performing notification processing such as displaying information indicating that the limit value that can be set in the processing condition 24 is reached, for example, on the display device 36, The process proceeds to 316.
  • FIG. 21 shows a part as an example of the table 58 according to the seventh embodiment.
  • the processing condition width (window width) operable for voltage fluctuation is the table 58 shown in FIG. 21, the voltage range allowed as fluctuation is + 6% to ⁇ 4%.
  • the voltage range allowed as a variation has only a margin of + 1% in the voltage increase direction. Therefore, information indicating that the limit value that can be set in the processing condition 24 is reached is notified when the allowable range of variation becomes narrower than a predetermined value. Accordingly, the maintenance person or the like can shift to processing such as correction of voltage and temperature as an environment and preparation for securing maintenance parts by confirming the notified information.
  • the seventh embodiment when the allowable range as the fluctuation becomes narrower than a predetermined value, information indicating that the limit value that can be set in the processing condition 24 is reached can be notified. It is possible to support processing such as environmental correction and preparation for securing maintenance parts.
  • 8th Embodiment is the structure similar to 1st Embodiment, it attaches
  • the processing condition width registered in the table 58 may be biased to one side of the range allowed as environmental fluctuations compared to the initial installation of the apparatus.
  • the environmental variation range is large, and it may be difficult to correct the processing condition range.
  • processing for updating the table 58 is executed.
  • FIG. 22 shows a flow of processing of the information processing apparatus 10 according to the eighth embodiment. Note that the processing flow shown in FIG. 22 is obtained by adding the processing of step 242 and step 244 between the processing of step 240 shown in FIG. 5 and the processing of step 250.
  • the process proceeds to the test process in step 242.
  • the test process is a process of testing whether an error occurs in the processing unit 16 according to the set process condition 24 when the process condition 24 is corrected and set in step 240. If no error occurs, the result is affirmative in step 244 and the process proceeds to the next step 250. On the other hand, when an error occurs, the result is negative in step 244, the process returns to step 210, and the initial operation preparation process is executed. As a result, the table 58 that is predicted to have changed with long-term use can be updated, and the table 58 with high compatibility can be used continuously.
  • the table 58 is automatically updated when it is predicted that the table 58 is not suitable for the current environment due to changes over time or the like.
  • the table 58 having high compatibility can be used continuously.
  • the present invention is not limited to the type of computer.
  • it may be a personal computer or other embedded computer.
  • nonvolatile recording medium is applied as the firmware memory 48 as an example of the storage medium.
  • An example of the nonvolatile recording medium includes an HDD, a solid state drive (SSD), and a serial flash memory.
  • the information processing program is stored (installed) in the firmware memory 48 in advance.
  • the present invention is not limited to this.
  • the information processing program in the disclosed technology can be provided in a form recorded on a recording medium such as a CD-ROM or a DVD-ROM.

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  • Physics & Mathematics (AREA)
  • Computing Systems (AREA)
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  • General Engineering & Computer Science (AREA)
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  • Mathematical Physics (AREA)
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Abstract

Selon un mode de réalisation de la présente invention, la performance opérationnelle d'un dispositif peut être améliorée. Au moyen d'un module de création (18), un dispositif de traitement d'informations (10) crée une table (26) et, avant que le dispositif ne soit activé pour fonctionner, la largeur d'une condition de traitement est associée à un environnement. Quand le dispositif est activé pour fonctionner et que l'environnement change, un module de commande (20) : extrait la largeur de la condition de traitement adaptée à l'environnement d'installation, de la table (26); il maintient une condition de traitement (24) lorsque la valeur définie pour la condition de traitement (24) est comprise dans la largeur de la condition de traitement, sur la base de l'environnement actuel; et il exécute une procédure de correction qui corrige la condition de traitement (24) lorsque la valeur définie n'est pas comprise dans la largeur de la condition de traitement. De cette manière, il est possible de réduire le nombre de fois où une procédure de réinitialisation de la condition de traitement (24) est exécutée lorsque l'environnement varie.
PCT/JP2013/057720 2013-03-18 2013-03-18 Dispositif de traitement d'informations, procédé de traitement d'informations, et programme de traitement d'informations WO2014147726A1 (fr)

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PCT/JP2013/057720 WO2014147726A1 (fr) 2013-03-18 2013-03-18 Dispositif de traitement d'informations, procédé de traitement d'informations, et programme de traitement d'informations

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EP3106951A1 (fr) * 2015-06-15 2016-12-21 Fronius International GmbH Appareil doté d'un refroidissement surveillé

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07248847A (ja) * 1994-03-11 1995-09-26 Fujitsu Ltd クロック信号調整方法および装置
JP2007034575A (ja) * 2005-07-26 2007-02-08 Fuji Xerox Co Ltd クロック信号供給装置及びクロック信号供給プログラム
JP2009069947A (ja) * 2007-09-11 2009-04-02 Renesas Technology Corp 半導体装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07248847A (ja) * 1994-03-11 1995-09-26 Fujitsu Ltd クロック信号調整方法および装置
JP2007034575A (ja) * 2005-07-26 2007-02-08 Fuji Xerox Co Ltd クロック信号供給装置及びクロック信号供給プログラム
JP2009069947A (ja) * 2007-09-11 2009-04-02 Renesas Technology Corp 半導体装置

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