Portable information terminal apparatus capable of correctly detecting power supply voltage
First Claim
1. A portable information terminal system including a CPU and peripheral circuits, comprising:
- a power supply;
a discharge quantity table for storing remaining power levels, each of which is defined based on a system state of said portable information terminal system and a voltage of said power supply;
a voltage detecting unit for detecting said power supply voltage in response to a voltage detection request; and
a control section for monitoring said system state, for issuing said voltage detection request in response to a voltage check request, for referring to said discharge quantity table based on said power supply voltage detected by said voltage detecting unit and said monitored system state to determine said remaining power level of said power supply.
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Accused Products
Abstract
In a portable information terminal system including a CPU and peripheral circuits, there is provided a discharge quantity table for storing remaining power levels. Each of the remaining power levels is defined based on a state of the portable information terminal system as a system state and a voltage of a power supply. A voltage detecting unit detects the power supply voltage in response to a voltage detection request. A control section monitors the system state, and issues the voltage detection request in response to a voltage check request. The control section refers to the discharge quantity table based on the power supply voltage detected by the voltage detecting unit and the monitored system state to determine the remaining power level of the power supply.
25 Citations
21 Claims
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1. A portable information terminal system including a CPU and peripheral circuits, comprising:
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a power supply; a discharge quantity table for storing remaining power levels, each of which is defined based on a system state of said portable information terminal system and a voltage of said power supply; a voltage detecting unit for detecting said power supply voltage in response to a voltage detection request; and a control section for monitoring said system state, for issuing said voltage detection request in response to a voltage check request, for referring to said discharge quantity table based on said power supply voltage detected by said voltage detecting unit and said monitored system state to determine said remaining power level of said power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 20)
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11. A method of determining a remaining power level of a power supply in a portable information terminal system including a CPU and peripheral circuits, comprising the steps of:
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monitoring a system state of the portable information terminal system; issuing a voltage detection request in response to a voltage check request; detecting a power supply voltage in response to said voltage detection request; and referring to a discharge quantity table based on said power supply voltage detected by said voltage detecting unit and said monitored system state to determine said remaining power level of said power supply, wherein said discharge quantity table includes a plurality of remaining power levels, each of which is defined with respect to said system state and said power supply voltage. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 21)
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Specification