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| Enabling target servers to control determination of full user synchronization |
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| Instrument housing |
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| Release apparatus for computer mass storage devices |
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| Cooling of electronic equipment cabinets |
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| Means to differentiate between commands and data on a communications link |
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Low-power consuming information processing apparatus
| Details |
Inventors: Yamagishi, Shoji;
Assignee: Matsushita Electric Industrial Co., Ltd. (Osaka, JP)
Primary Examiner: Fleming; Michael R.
Assistant Examiner: Chun; Debra A.
Attorney, Agent or Firm: Stevens, Davis, Miller & Mosher
There is disclosed a low-power consuming information processing apparatus having a storage unit for storing an application program of a main task, a main CPU capable of operating at a high speed for executing the application program, a sub-CPU for executing a process other than the main task, the sub-CPU being of a low-voltage, low-power consuming type, and a peripheral circuit being controlled by the sub-CPU. |
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DETAILED DESCRIPTION It is an object of the first embodiment to solve the above-described conventional problems and provide a low-power consuming information processing apparatus capable of considerably suppressing power consumption and allowing a long term operation with a battery.
In order to achieve the above object, the first embodiment provides an information processing apparatus comprising a storage unit for storing an application program of a main task, a main CPU capable of operating at a high speed for executing the application program, a sub-CPU for executing a process other than the main task, the sub-CPU being of a low-voltage, low-power consuming type, and a peripheral circuit controlled by the sub-CPU.
The information processing apparatus of the first embodiment constructed as above operates in the following manner.
Namely, an operation not required to be processed at a high speed, such as a normal key entry waiting operation, and a communication operation, is processed by the low-power consuming sub-CPU while stopping the main CPU, and only an operation required to be processed at a high speed, such as a data/file retrieval and correction, is processed by the high speed main CPU which was activated by the sub-CPU.
Therefore, an average power consumption can be considerably reduced.
According to the first embodiment, although the sub-CPU handles keyboard operations and communications, it always operates under the control of the main CPU when the application program is executed.
As a result, during the main routine such as file retrieval and correction, the period while the high power consuming main CPU operates, occupies a large part of the operating time of the apparatus.
According to the first embodiment, the main CPU consuming a large power is required to execute an application program, and to control the sub-CPU and peripheral circuits.
There thus arises a problem in that it is difficult to reduce power consumption of the apparatus.
It is therefore an object of the second embodiment to provide a low-power consuming information processing apparatus capable of greatly suppressing power consumption of the apparatus, and allowing a long term operation with a battery
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I/O Systems 
