METHOD AND APPARATUS FOR BATTERY POWER PRE-CHECK AT SYSTEM POWER-ON
First Claim
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1. A system comprising:
- at least one electronic component;
a battery check circuit for determining, when a power consumption level of the at least one electronic component is increased, whether to provide power from a battery to the at least one electronic component by comparing a battery power level to a predetermined power level.
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Abstract
A system including at least one electronic component and a battery check circuit. When a power consumption level of the at least one electronic component is increased, the battery check circuit determines whether to provide power from a battery to the at least one electronic component by comparing a power level of the battery to a first power level.
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Citations
22 Claims
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1. A system comprising:
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at least one electronic component; a battery check circuit for determining, when a power consumption level of the at least one electronic component is increased, whether to provide power from a battery to the at least one electronic component by comparing a battery power level to a predetermined power level. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method comprising:
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testing whether a first battery has a power level less than a first level; preventing the first battery from powering an electronic component if the power level is less than the first level; and enabling circuitry to provide power from the first battery to the electronic component if the power level is at least the first level. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A battery check circuit comprising:
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a latch circuit which latches power from a first battery upon receiving an enabling signal; and a test circuit which receives power from the first battery via the latch circuit, the test circuit testing a charge level of a second battery and, if the charge level is less than a predetermined charge level, asserting a shutdown signal. - View Dependent Claims (16, 17)
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18. An apparatus comprising:
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a latch having a delay circuit coupled to a preset input to set the latch to a first value as a voltage is applied to the latch on a first supply line; a first gate having a control input which enables the first gate when a push button switch is closed or when the latch stores the first value, the first gate being disabled when the latch stores a second value and the push button switch is open; a first battery switchably coupled to the first supply line by the first gate when the first gate is enabled; a second battery; and a controller which tests a charge level of the second battery and, if the charge level of the second battery is less than a predetermined charge level, to reset the latch to the second value. - View Dependent Claims (19, 20, 21, 22)
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Specification