JP3811166B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device incorporating a CPU board, and more particularly to an electronic device characterized by a cooling control mechanism for a CPU chip or other heat generating component mounted on the CPU board.

  In an electronic device mounted with a CPU board, such as a portable computer, the processing performance (processing speed) is determined by the CPU clock frequency. That is, the processing performance increases as the clock frequency is increased within the specified limit clock frequency range of the CPU chip. However, when the processing speed is increased, power consumption increases according to the clock frequency, and accordingly, the amount of heat generated by the CPU chip also increases.

  Therefore, in this type of portable computer mounted with a CPU board, for example, a portable computer, chip cooling means for removing the heat generated in the CPU chip and suppressing the temperature rise of the CPU chip in order to fully exhibit the performance of the CPU. Have been proposed and realized.

  Conventionally, as a measure for suppressing the temperature rise of the CPU chip, means for detecting the ambient temperature around the CPU chip and controlling the clock frequency based on the detected output has been adopted. That is, when the ambient temperature around the CPU chip reaches the set temperature, the CPU clock frequency is lowered. Alternatively, the CPU clock frequency is controlled to be inversely proportional to the ambient temperature around the CPU chip.

  However, this type of conventional temperature control means is configured such that the heat generated in the heat generating part of the CPU chip propagates through the surrounding air, and the temperature sensor detects the diffused ambient temperature and controls the clock. Therefore, since a relatively large time delay occurs before the heat generation of the CPU chip is reflected in the frequency control of the CPU clock, and the accurate temperature of the heat generation portion cannot be detected, precise and precise temperature control can be performed. In other words, the CPU chip cannot be operated in the vicinity of the limit frequency because a margin of the operation limit temperature must be taken large. Therefore, conventionally, there has been a problem that the performance of the CPU chip cannot be fully exhibited, and high-speed processing using the CPU clock near the limit frequency cannot be realized.

  Also, when the temperature of the CPU chip reaches a high temperature at which normal operation cannot be maintained, if the system operation is not stopped at that time, not only data destruction during processing will be caused, but also hardware and software abnormalities will be caused, May be difficult to recover.

  In addition, when a portable computer is mounted on a function expansion unit that expands its functions, the heat dissipation port of the portable computer is blocked by the function expansion unit and indirectly receives the heat generated by the function expansion unit. When used, depending on the surrounding environment, the temperature inside the casing of the portable computer may rise abnormally, which may lead to data destruction during processing, hardware abnormalities, and the like.

  As described above, in the conventional CPU temperature control means, since a relatively large time difference occurs until the heat generation temperature of the CPU chip is reflected in the CPU clock control, it is not possible to perform highly accurate temperature detection. For this reason, there is a problem that the temperature of the CPU chip cannot be finely controlled, and the CPU chip cannot be stably operated at a high speed in the vicinity of the limit frequency that fully utilizes the performance of the CPU chip.

  Also, when the temperature of the CPU chip reaches a high temperature at which normal operation cannot be maintained, if the system operation is not stopped at that time, not only data destruction during processing will be caused, but also hardware and software abnormalities will be caused, However, there was a risk that it would be difficult to recover. In addition, when a portable computer is mounted on a function expansion unit that expands its functions, the heat dissipation port of the portable computer is blocked by the function expansion unit and indirectly receives the heat generated by the function expansion unit. When used, depending on the surrounding environment, the temperature inside the casing of the portable computer may rise abnormally, which may lead to data destruction during processing, hardware abnormalities, and the like.

  The present invention has been made in view of the above circumstances, and in an electronic device mounted with a CPU board, the heat generation temperature of the CPU chip is reflected quickly and accurately in the temperature control of the chip, and the performance of the CPU chip is fully utilized. An object of the present invention is to provide an electronic device in which a CPU chip can be operated at a high speed near a limit frequency.

The present invention provides a CPU, clock generation means for generating an operation clock of the CPU, a temperature sensor for detecting the temperature of the CPU, a fan for blowing air to the CPU, and a temperature detected by the temperature sensor are predetermined. And a control means for lowering the frequency of the operation clock of the CPU when the value is exceeded, and a drive control means for driving and controlling the fan before reducing the frequency of the operation clock of the CPU. Electronic equipment.

The present invention relates to a CPU, clock generation means for generating an operation clock of the CPU, a temperature sensor for detecting the temperature of the CPU, a fan for blowing air to the CPU, and an increase in temperature detected by the temperature sensor. Accordingly, there is provided an electronic apparatus comprising: control means for reducing the frequency of the operation clock of the CPU; and drive control means for controlling the drive of the fan before reducing the frequency of the operation clock. is there.

The present invention relates to a CPU, clock generation means for supplying a clock to the CPU, a temperature sensor for detecting the temperature of the CPU, a fan for blowing air to the CPU, and a temperature detected by the temperature sensor being a predetermined value. And a control means for reducing the frequency of the supply clock to the CPU, and a drive control means for controlling the drive of the fan before reducing the frequency of the supply clock to the CPU. It is an electronic device.

The present invention relates to a CPU, clock generation means for generating an operation clock of the CPU, a temperature sensor for detecting the temperature of the CPU, a fan for blowing air to the CPU, and a first temperature for driving and controlling the fan. And a setting means for setting a second temperature for controlling a frequency of the clock generation means, a temperature detected by the temperature sensor, and the first temperature set by the setting means. Control means for controlling the frequency of the clock generation means based on the temperature detected by the temperature sensor and the second temperature set by the setting means. It is an electronic device.

In an electronic device having a built-in CPU board, the performance of the CPU chip can be fully utilized.

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a first embodiment of the present invention.

  In FIG. 1, reference numeral 10 denotes a CPU board having a CPU mounting circuit pattern. Reference numeral 11 denotes a CPU chip mounted at the CPU mounting position of the CPU board 10 and is mounted at the CPU mounting position of the CPU board 10 through a CPU connector or directly by soldering or the like.

  Reference numeral 12 denotes a temperature sensor (S) directly attached to the CPU chip 11, which directly measures the temperature of the upper surface heat generation portion of the CPU chip 11.

  A clock generator (CLK-GEN) 13 supplies an operation clock (CPU clock) to the CPU chip 11 and controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 12. Here, if the temperature detected by the temperature sensor (S) 12 rises above the set temperature, the frequency of the CPU clock decreases as the temperature rises.

  A circuit 14 supplies a CPU clock to the CPU chip 11 and supplies a CPU clock generated by the clock generator (CLK-GEN) 13 to a clock input terminal (Tc) of the CPU chip 11.

  In the above configuration, the temperature sensor (S) 12 directly attached to the CPU chip 11 directly measures the temperature of the heat generating portion on the upper surface of the CPU chip 11 and sends the temperature detection signal to the clock generator (CLK-GEN) 13. To supply.

  The clock generator (CLK-GEN) 13 monitors the temperature of the CPU chip 11 based on the detection signal of the temperature sensor (S) 12, and is preset when the temperature of the CPU chip 11 is equal to or lower than the set temperature. A CPU clock having a specified frequency is supplied to the clock input terminal (Tc) of the CPU chip 11 via the clock supply circuit 14.

  Thereafter, when the temperature of the CPU chip 11 rises and exceeds the set temperature, the clock generator (CLK-GEN) 13 controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 12. That is, here, if the temperature detected by the temperature sensor (S) 12 rises above the set temperature, the CPU clock frequency is lowered as the temperature rises. This CPU clock is input to the clock input terminal (Tc) of the CPU chip 11 via the clock supply circuit 14.

  Thus, since the frequency of the CPU clock supplied to the CPU chip 11 is controlled based on the detection signal of the temperature sensor (S) 12 directly attached to the CPU chip 11, the heat generation temperature of the CPU chip 11 is controlled. It can be directly reflected in the temperature control by the clock frequency control of the CPU chip 11 (accurately without time delay). Thereby, the CPU chip 11 can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip 11.

  FIG. 2 is a block diagram showing a second embodiment of the present invention.

  In FIG. 2, reference numeral 20 denotes a CPU board having a CPU mounting circuit pattern, and reference numeral 21 denotes a CPU chip mounted on the CPU mounting position of the CPU board 20.

  Reference numeral 22 denotes a temperature sensor (S) provided in the CPU chip mounting portion of the CPU board 10, and here, the temperature of the lower surface heat generation portion of the CPU chip 21 is measured directly or at a close distance.

  A clock generator (CLK-GEN) 23 supplies an operation clock (CPU clock) to the CPU chip 21 and controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 22. Here, if the temperature detected by the temperature sensor (S) 22 rises above the set temperature, the frequency of the CPU clock decreases as the temperature rises.

  A circuit 24 supplies a CPU clock to the CPU chip 21 and supplies a CPU clock generated by the clock generator (CLK-GEN) 23 to a clock input terminal (Tc) of the CPU chip 21.

  In the above configuration, the temperature sensor (S) 22 provided in the CPU chip mounting portion of the CPU board 20 measures the temperature of the lower surface heat generation portion of the CPU chip 21 directly or at a close distance, and outputs the temperature detection signal to the clock. It supplies to the generator (CLK-GEN) 23.

  The clock generator (CLK-GEN) 23 monitors the temperature of the CPU chip 21 based on the detection signal of the temperature sensor (S) 22, and is preset when the temperature of the CPU chip 21 is equal to or lower than the set temperature. A CPU clock having a specified frequency is supplied to the clock input terminal (Tc) of the CPU chip 21 through the clock supply circuit 24.

  Thereafter, when the temperature of the CPU chip 21 rises and exceeds the set temperature, the clock generator (CLK-GEN) 23 controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 22. That is, here, when the temperature detected by the temperature sensor (S) 22 rises, the CPU clock frequency is lowered accordingly. This CPU clock is input to the clock input terminal (Tc) of the CPU chip 21 via the clock supply circuit 24.

  Thus, since the frequency of the CPU clock supplied to the CPU chip 21 is controlled based on the detection signal of the temperature sensor (S) 22 provided in the CPU chip mounting portion of the CPU board 10, the CPU chip 21. Can be immediately reflected in the temperature control by the clock frequency control of the CPU chip 21 (accurately without time delay). Thereby, the CPU chip 21 can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip 21.

  FIG. 3 is a block diagram showing a third embodiment of the present invention.

  In FIG. 3, reference numeral 30 denotes a CPU board having a CPU mounting circuit pattern. Reference numeral 31 denotes a CPU chip mounted at the CPU mounting position of the CPU board 30 and is provided with fins (F) for dissipating heat generated by the chip on the upper surface of the chip.

  Reference numeral 32 denotes a temperature sensor (S) directly attached to the fin (F) of the CPU chip 31. Here, the temperature of the heat generation part of the CPU chip 31 is detected by directly measuring the temperature of the fin (F). .

  A clock generator (CLK-GEN) 33 supplies an operation clock (CPU clock) to the CPU chip 31 and controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 32. Here, when the temperature detected by the temperature sensor (S) 32 rises above the set temperature, the frequency of the CPU clock decreases as the temperature rises.

  A circuit 34 supplies a CPU clock to the CPU chip 31 and supplies a CPU clock generated by a clock generator (CLK-GEN) 33 to a clock input terminal (Tc) of the CPU chip 31.

  In the above configuration, the temperature sensor (S) 32 directly attached to the fin (F) of the CPU chip 31 detects the temperature of the heat generating portion of the CPU chip 31 by directly measuring the temperature of the fin (F). Then, the temperature detection signal is supplied to the clock generator (CLK-GEN) 33.

  The clock generator (CLK-GEN) 33 monitors the temperature of the CPU chip 31 based on the detection signal of the temperature sensor (S) 12, and is preset when the temperature of the CPU chip 31 is equal to or lower than the set temperature. A CPU clock having a specified frequency is supplied to the clock input terminal (Tc) of the CPU chip 31 via the clock supply circuit 34.

  Thereafter, when the temperature of the CPU chip 31 rises and exceeds the set temperature, the clock generator (CLK-GEN) 33 controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 32. That is, here, if the temperature detected by the temperature sensor (S) 32 rises above the set temperature, the CPU clock frequency is lowered as the temperature rises. This CPU clock is input to the clock input terminal (Tc) of the CPU chip 31 via the clock supply circuit 34.

  Thus, since the frequency of the CPU clock supplied to the CPU chip 31 is controlled based on the detection signal of the temperature sensor (S) 32 directly attached to the fin (F) of the CPU chip 31, the CPU chip The heat generation temperature of 31 can be reflected immediately (that is, accurately by greatly reducing the delay time) in the temperature control by the clock frequency control of the CPU chip 31. Thereby, the CPU chip 31 can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip 31.

  FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

  In FIG. 4, reference numeral 40 denotes a CPU board having a CPU mounting circuit pattern. Reference numeral 41 denotes a CPU chip mounted at the CPU mounting position of the CPU board 40. Here, a heat conductor (H) for transmitting heat generated in the chip is provided on the upper surface of the chip.

  Reference numeral 42 denotes a temperature sensor (S) directly attached to the heat conductor (H). Here, the temperature of the heat conductor (H) is directly measured to detect the temperature of the heat generating portion of the CPU chip 41. .

  A clock generator (CLK-GEN) 43 supplies an operation clock (CPU clock) to the CPU chip 41, and controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S). Here, when the temperature detected by the temperature sensor (S) 42 rises above the set temperature, the frequency of the CPU clock decreases as the temperature rises.

  A circuit 44 supplies a CPU clock to the CPU chip 41 and supplies a CPU clock generated by the clock generator (CLK-GEN) 43 to a clock input terminal (Tc) of the CPU chip 41.

  In the above configuration, the temperature sensor (S) 42 attached directly to the heat conductor (H) directly measures the temperature of the heat conductor (H) to thereby determine the temperature of the heat generating portion of the CPU chip 41. The detection signal is supplied to a clock generator (CLK-GEN) 43.

  The clock generator (CLK-GEN) 43 monitors the temperature of the CPU chip 41 based on the detection signal of the temperature sensor (S) 42. At this time, when the temperature of the CPU chip 41 is lower than the set temperature, The CPU clock having the set specified frequency is supplied to the clock input terminal (Tc) of the CPU chip 41.

  Thereafter, when the temperature of the CPU chip 41 rises and exceeds the set temperature, the clock generator (CLK-GEN) 43 controls the frequency of the CPU clock based on the temperature indicated by the detection signal of the temperature sensor (S) 42. To do. That is, here, when the temperature detected by the temperature sensor (S) 42 rises above the set temperature, the frequency of the CPU clock decreases as the temperature rises.

  This CPU clock is input to the clock input terminal (Tc) of the CPU chip 41 via the clock supply circuit 44.

  Thus, the frequency of the CPU clock supplied to the CPU chip 41 based on the detection signal of the temperature sensor (S) 42 directly attached to the heat conductor (H) that transmits the heat generated in the CPU chip 41 is as follows. Since it is controlled, the heat generation temperature of the CPU chip 41 can be immediately reflected in the temperature control by the clock frequency control of the CPU chip 41 (that is, accurately by greatly reducing the delay time). Thereby, the CPU chip 41 can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip 41.

  FIG. 5 is a block diagram showing a fifth embodiment of the present invention.

  In FIG. 5, reference numeral 50 denotes a CPU board having a CPU mounting circuit pattern, and reference numeral 51 denotes a CPU chip mounted on the CPU mounting position of the CPU board 50.

  Reference numeral 52 denotes a temperature sensor (S) directly attached to the CPU chip 51, which directly detects the temperature of the heat generating portion of the CPU chip 51.

  53 is an air cooling fan for blowing cooling air to the CPU chip 51, and 54 is a fan drive control circuit (DRV) for driving and controlling the air cooling fan 53 based on the detection signal of the temperature sensor (S) 52. .

  The fan drive control circuit (DRV) 54 drives the air cooling fan 53 and blows cooling air to the CPU chip 51 when the temperature detected by the temperature sensor (S) 52 reaches a set value.

  In the above configuration, the surface temperature of the CPU chip 51 is detected by the temperature sensor (S) 52, and the detection signal is supplied to the fan drive control circuit (DRV) 54.

  When the temperature detected by the temperature sensor (S) 52 reaches the set temperature, the fan drive control circuit (DRV) 54 drives the air cooling fan 53 to blow cooling air to the CPU chip 51.

  Thus, since the fan 53 for air-cooling the CPU chip 51 is directly driven and controlled based on the detection signal of the temperature sensor (S) 52 directly attached to the CPU chip 51, the heat generation of the CPU chip 51 is achieved. The temperature can be immediately reflected in the cooling control of the CPU chip 51 (that is, the delay time is greatly shortened). Thereby, the CPU chip 51 can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip 51.

  FIG. 6 is a block diagram showing a sixth embodiment of the present invention.

  In FIG. 6, 60 is a CPU board having a CPU mounting circuit pattern, and 61 is a CPU chip mounted on the CPU mounting position of the CPU board 60.

  Reference numeral 62 denotes a temperature sensor (S) provided in the CPU chip mounting portion of the CPU chip 61, and here, the temperature of the chip heat generating portion is directly detected from the lower surface of the CPU chip 61.

  63 is an air cooling fan for blowing cooling air to the CPU chip 61, and 64 is a fan drive control circuit (DRV) for driving and controlling the air cooling fan 63 based on the detection signal of the temperature sensor (S) 62. .

  The fan drive control circuit (DRV) 64 drives the air cooling fan 63 to blow cooling air onto the CPU chip 61 when the temperature detected by the temperature sensor (S) 62 reaches a set value.

  In the above configuration, the temperature of the CPU chip 61 is detected by the temperature sensor (S) 62, and the detection signal is supplied to the fan drive control circuit (DRV) 64.

  When the temperature detected by the temperature sensor (S) 62 reaches the set temperature, the fan drive control circuit (DRV) 64 drives the air cooling fan 63 to blow cooling air to the CPU chip 61.

  Thus, since the fan 63 for air-cooling the CPU chip 61 is directly driven and controlled based on the detection signal of the temperature sensor (S) 62 directly attached to the CPU chip 61, the CPU chip 61 generates heat. The temperature can be immediately reflected in the cooling control of the CPU chip 61 (with a greatly shortened delay time). Thereby, the CPU chip 61 can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip 61.

  FIG. 7 is a block diagram showing a seventh embodiment of the present invention.

  In FIG. 7, reference numeral 70 denotes a CPU board having a CPU mounting circuit pattern. Reference numeral 71 denotes a CPU chip mounted at the CPU mounting position of the CPU board 70, and is provided with fins (F) for removing heat from the chip on the upper surface of the chip.

  Reference numeral 72 denotes a temperature sensor (S) directly attached to the fin (F) of the CPU chip 71. Here, the temperature of the heat generation part of the CPU chip 71 is detected by directly measuring the temperature of the fin (F). .

  73 is an air cooling fan for blowing cooling air to the CPU chip 71, and 74 is a fan drive control circuit (DRV) for driving and controlling the air cooling fan 73 based on the detection signal of the temperature sensor (S) 72. .

  The fan drive control circuit (DRV) 74 drives the air cooling fan 73 and blows cooling air to the CPU chip 71 when the temperature detected by the temperature sensor (S) 72 reaches a set value.

  In the above configuration, the temperature of the CPU chip 71 is detected by the temperature sensor (S) 72, and the detection signal is supplied to the fan drive control circuit (DRV) 74.

  When the temperature detected by the temperature sensor (S) 72 reaches the set temperature, the fan drive control circuit (DRV) 74 drives the air cooling fan 73 and blows cooling air to the CPU chip 71.

  As described above, the fan 73 for air-cooling the CPU chip 71 is directly driven and controlled based on the detection signal of the temperature sensor (S) 72 directly attached to the fin (F) that radiates the heat of the CPU chip 71. For this reason, the heat generation temperature of the CPU chip 71 can be immediately reflected in the cooling control of the CPU chip 71. Thereby, the CPU chip 71 can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip 71.

  FIG. 8 is a block diagram showing an eighth embodiment of the present invention.

  In FIG. 8, reference numeral 80 denotes a CPU board having a CPU mounting circuit pattern. Reference numeral 81 denotes a CPU chip mounted on the CPU mounting position of the CPU board 80. Here, a heat conductor (H) for transmitting heat generated in the chip is provided on the upper surface of the chip.

  Reference numeral 82 denotes a temperature sensor (S) directly attached to the heat conductor (H) of the CPU chip 81. Here, the temperature of the heat conductor (H) is directly measured, so that the heat generation portion of the CPU chip 81 is measured. Detect temperature.

  Reference numeral 83 denotes an air cooling fan for blowing cooling air to the CPU chip 81, and 84 is a fan drive control circuit (DRV) for driving and controlling the air cooling fan 83 based on a detection signal of the temperature sensor (S) 82. .

  The fan drive control circuit (DRV) 84 drives the air cooling fan 83 to blow cooling air to the CPU chip 81 when the temperature detected by the temperature sensor (S) 82 reaches a set value.

  In the above configuration, the temperature of the CPU chip 81 is detected by the temperature sensor (S) 82, and the detection signal is supplied to the fan drive control circuit (DRV) 84.

  When the temperature detected by the temperature sensor (S) 82 reaches the set temperature, the fan drive control circuit (DRV) 84 drives the air cooling fan 83 to blow cooling air to the CPU chip 81.

  As described above, the fan 83 for air-cooling the CPU chip 81 is directly driven and controlled based on the detection signal of the temperature sensor (S) 82 directly attached to the heat conductor (H) of the CPU chip 81. Therefore, the heat generation temperature of the CPU chip 81 can be immediately reflected in the cooling control of the CPU chip 81. Thereby, the CPU chip 81 can be operated at high speed near the limit frequency by fully utilizing the performance of the CPU chip 81.

  FIG. 9 is a block diagram showing a ninth embodiment of the present invention.

  In the ninth embodiment, in a portable computer having a suspend / resume function, the temperature of the CPU chip is detected by the temperature sensor, and the suspend process is executed when the temperature sensor detects the operating limit temperature of the CPU chip. Have means.

  In FIG. 9, reference numeral 91 denotes a CPU (CPU chip) that controls the entire system, and via a system bus, a main memory (MEM) 94, a storage memory 95, and various input / output devices (I / O). ) Is connected.

  Reference numeral 92 denotes a temperature sensor (S) for measuring the chip temperature of the CPU 91, and here, as an example, it is assumed that it is directly attached to the chip as shown in FIG. 1 or FIG.

  Reference numeral 93 denotes an interrupt generation unit (IRG) that monitors the detection temperature of the temperature sensor (S) 92 and generates a forced interrupt when the detection temperature reaches a predetermined operation limit temperature. When the operation limit temperature is reached, a forced interrupt is generated for the CPU 91.

  Reference numeral 95 denotes a suspend / resume processing unit (S / R) that is resident in the main memory (MEM) 94. The suspend / resume processing unit (S / R) is activated when the power is turned on / off when the resume mode is set in the setup.

  The suspend / resume function itself is the same as that of a normal personal computer. However, in this embodiment, when a forced interrupt occurs in the interrupt generation unit (IRG) 93 regardless of the resume mode setting contents, The resume processing unit is forcibly activated and the suspend process is executed. After completion of the suspend process, the power is shut off (powered off). Thereafter, when the power is turned on (powered on), the resume processing is executed, the processing state at the time of interruption is restored, and the processing from the time of interruption can be continued.

  In the above configuration, the temperature sensor (S) 92 measures the chip temperature of the CPU 91 and supplies the temperature detection signal to the interrupt generator (IRG) 93.

  The interrupt generation unit (IRG) 93 monitors the temperature detected by the temperature sensor (S) 92, and generates a forced interrupt to the CPU 91 when the detected temperature reaches a predetermined operation limit temperature.

  When the CPU 91 receives a forced interrupt from the interrupt generation unit (IRG) 93, the CPU 91 terminates the processing at an appropriate processing stage, activates the suspend / resume processing unit (S / R) 95, and executes the suspend process. Data by this suspend process is stored in the storage memory 95.

  As described above, when the chip temperature of the CPU 91 reaches a high temperature at which normal operation cannot be maintained, by executing the suspend process, when the normal operation can be maintained, the processing state at the time of interruption is restored. Since the process can be continued, a highly reliable operation can be maintained.

FIG. 10 is a block diagram showing a tenth embodiment of the present invention.

  In the tenth embodiment, in an expansion unit that expands the functions of a portable computer, a sensor that detects the built-in chip temperature of the portable computer mounted in the unit and a fan that blows cooling air to the mounted portable computer And a control means for driving and controlling the fan based on the detection signal of the temperature sensor to cover a decrease in heat dissipation of the portable computer when the portable computer is mounted on the function expansion unit. Thus, a highly reliable function expansion operation can be maintained.

  In FIG. 10, reference numeral 100 denotes an expansion unit that expands the functions of the portable computer, and reference numeral 200 denotes a portable computer mounted on the expansion unit 100.

  Reference numeral 101 denotes a temperature sensor (S) provided in the portable computer mounting portion of the expansion unit 100. Here, two sensors monitor the internal temperature of the portable computer.

  Reference numeral 102 denotes an air cooling fan for sending cooling air to the ventilation port CA of the portable computer 200 mounted on the portable computer mounting section via the ventilation port CB. 103 denotes detection signals of the temperature sensors (S) 101 and 101. This is a fan drive control circuit (DRV) that drives and controls the fan 102 for air cooling.

  The fan drive control circuit (DRV) 103 drives the air cooling fan 102 to the portable computer 200 via the ventilation ports CA and CB when the detected temperature of the temperature sensors (S) 101 and 101 reaches a set value. Send cooling air.

  In the above configuration, the internal temperature of the portable computer 200 mounted on the portable computer mounting portion of the expansion unit 100 is detected by the temperature sensors (S) 101, 101, and each detection signal is detected by the fan drive control circuit (DRV) 103. To be supplied.

  The fan drive control circuit (DRV) 103 drives the air cooling fan 102 when the temperature detected by any of the temperature sensors (S) 101, 101 reaches a set temperature, and connects the vents CA, CB to the portable computer 200. Cooling air is sent through.

  By having such a portable computer cooling mechanism, it is possible to cover a decrease in heat dissipation of the portable computer 200 when the portable computer 200 is mounted on the expansion unit 100, and to maintain a highly reliable function expansion operation.

  FIG. 11 is a block diagram showing an eleventh embodiment of the present invention.

  In the eleventh embodiment, the second embodiment shown in FIG. 2 and the sixth embodiment shown in FIG. 6 are combined. Here, a part of the sixth embodiment is added to the second embodiment. It shows as a structure, and about each component, the same code | symbol is attached | subjected to the same part and the description is abbreviate | omitted.

  In the eleventh embodiment, the temperature sensor (S) 22 provided in the CPU chip mounting portion of the CPU board 20 measures the temperature of the lower surface heat generating portion of the CPU chip 21 directly or at a close distance, and the temperature. The detection signal is supplied to the clock generator (CLK-GEN) 23 and also supplied to the fan drive control circuit (DRV) 64.

  The clock generator (CLK-GEN) 23 monitors the temperature of the CPU chip 21 based on the detection signal of the temperature sensor (S) 22, and is preset when the temperature of the CPU chip 21 is equal to or lower than the set temperature. A CPU clock having a specified frequency is supplied to the clock input terminal (Tc) of the CPU chip 21 through the clock supply circuit 24.

  The fan drive control circuit (DRV) 64 monitors the temperature of the CPU chip 21 based on the detection signal of the temperature sensor (S) 22, and when the temperature of the CPU chip 21 is equal to or lower than the set temperature, the fan 63 is controlled. Stopped.

  Thereafter, when the temperature detected by the temperature sensor (S) 22 reaches the set temperature, the fan drive control circuit (DRV) 64 drives the fan 63 and blows cooling air to the CPU chip 21.

  The clock generator (CLK-GEN) 23 controls the frequency of the CPU clock based on the detection signal of the temperature sensor (S) 22 when the temperature of the CPU chip 21 rises and exceeds the set temperature. That is, here, when the temperature detected by the temperature sensor (S) 22 rises, the CPU clock frequency is lowered accordingly. This CPU clock is input to the clock input terminal (Tc) of the CPU chip 21 via the clock supply circuit 24.

  At this time, by setting the set temperature of the fan drive control circuit (DRV) 64 lower than the set temperature of the clock generator (CLK-GEN) 23, the clock generator (CLK-GEN) 23 reduces the CPU clock. Since the fan 63 is driven to cool the CPU chip 21 before starting, the CPU chip can be operated at high speed for a long time near the limit frequency, and the set temperature and clock generation of the fan drive control circuit (DRV) 64 When the set temperature of the device (CLK-GEN) 23 is set to be equal, cooling by the fan 63 and reduction of the CPU clock are started simultaneously, and the high-speed CPU clock state can be restored in a short time.

  In the above-described embodiment, only one temperature sensor is shown except for FIG. 11, but a configuration in which a plurality of temperature sensors are provided may be provided. For example, any combination of FIG. 1, FIG. 2, FIG. 3, and FIG. 4, or any combination of any of FIG. 1, FIG. 2, FIG. 3, and FIG. There may be.

1 is a block diagram showing a first embodiment of the present invention. The block diagram which shows 2nd Example of this invention. The block diagram which shows 3rd Example of this invention. The block diagram which shows 4th Example of this invention. The block diagram which shows 5th Example of this invention. The block diagram which shows 6th Example of this invention. The block diagram which shows 7th Example of this invention. The block diagram which shows 8th Example of this invention. The block diagram which shows 9th Example of this invention. The block diagram which shows 10th Example of this invention. The block diagram which shows 11th Example of this invention.

Explanation of symbols

10, 20, 30, 40, 50, 60, 70, 80 ... CPU board, 11, 21, 31, 41, 51, 61, 71, 81, 91 ... CPU chip, 12, 22, 32, 42, 52, 62, 72, 82, 92 ... temperature sensor (S), 13, 23, 33, 43 ... clock generator (CLK-GEN), 14, 24, 34, 44 ... clock supply circuit, 53, 63, 73, 83 ... Fans, 54, 64, 74, 84 ... Fan drive control circuit (DRV), 93 ... Interrupt generator (IRG), 94 ... Main memory (MEM), 95 ... Suspend / resume processor (S / R), 96 Storage memory, Tc Clock input terminal, F Fin, H Thermal conductor

Claims (4)

CPU,
Clock generating means for generating an operation clock of the CPU;
A temperature sensor for detecting the temperature of the CPU;
A fan that blows wind on the CPU;
Control means for lowering the frequency of the operation clock of the CPU when the temperature detected by the temperature sensor exceeds a predetermined value;
Drive control means for driving and controlling the fan before lowering the frequency of the operation clock of the CPU;
An electronic apparatus comprising: CPU,
Clock generating means for generating an operation clock of the CPU;
A temperature sensor for detecting the temperature of the CPU;
A fan that blows wind on the CPU;
Control means for reducing the frequency of the operation clock of the CPU as the temperature detected by the temperature sensor increases;
Drive control means for driving and controlling the fan before lowering the frequency of the operation clock;
An electronic apparatus comprising: CPU,
Clock generating means for supplying a clock to the CPU;
A temperature sensor for detecting the temperature of the CPU;
A fan that blows wind on the CPU;
When the temperature detected by the temperature sensor exceeds a predetermined value, control means for reducing the frequency of the clock supplied to the CPU;
Drive control means for driving and controlling the fan before reducing the frequency of the supply clock to the CPU;
An electronic apparatus comprising: CPU,
Clock generating means for generating an operation clock of the CPU;
A temperature sensor for detecting the temperature of the CPU;
A fan that blows wind on the CPU;
Setting means for setting a first temperature for driving and controlling the fan and a second temperature for controlling the frequency of the clock generating means;
The fan is driven and controlled based on the temperature detected by the temperature sensor and the first temperature set by the setting means, and the temperature detected by the temperature sensor and the setting means set by the setting means Control means for controlling the frequency of the clock generation means based on a second temperature;
An electronic apparatus comprising:

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