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 back-up battery to provide a back-up voltage supply on a back-up supply node;
a battery check circuit to be powered by the back-up voltage supply and to determine, in response to an attempt at system power-on, whether to provide power from a battery different than said back-up battery to the at least one electronic component by comparing the battery'"'"'s 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
23 Claims
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1. A system comprising:
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at least one electronic component; a back-up battery to provide a back-up voltage supply on a back-up supply node; a battery check circuit to be powered by the back-up voltage supply and to determine, in response to an attempt at system power-on, whether to provide power from a battery different than said back-up battery to the at least one electronic component by comparing the battery'"'"'s 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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powering, using a second battery, a battery check circuit for testing a power level of a first battery upon system startup regardless of a power state of the first battery; testing whether the power level of the first battery is less than a first level responsive to a stimulus that indicates application of power is desired but before power is provided; 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)
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12. A method comprising:
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powering, using a second battery, a battery check circuit for testing a power level of a first battery upon system startup regardless of a power state of the first battery, said powering the battery check circuit comprising; sensing an on button being depressed, enabling power to the battery check circuit, and maintaining power to the battery check circuit while the power level of the first battery is tested, wherein maintaining power to the battery check circuit comprises setting a latch which has its output coupled to enable a gate connecting the battery check circuit to the second battery; testing whether the power level of the first battery is less than a first level responsive to a stimulus that indicates application of power is desired but before power is provided; 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 (13, 14)
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15. A method comprising:
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receiving an enabling signal; latching power from a first battery responsive to the enabling signal; powering a test circuit from the first battery via the latch circuit; testing a charge level of a second battery via the test circuit; and asserting a shutdown signal if the charge level is less than a predetermined charge level. - View Dependent Claims (16, 17)
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18. An apparatus comprising:
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a main battery, the main battery having a charge status; a backup battery; a plurality of system components; a power switch; and a battery check circuit that is, in response to actuation of the power switch, powered during a battery test interval exclusively by the backup battery, regardless of the charge status of the main battery, the battery check circuit to determine based on the charge status of the main battery whether to supply power from the main battery to the plurality of system components. - View Dependent Claims (19, 20, 21)
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22. An apparatus comprising:
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a main battery, the main battery having a charge status; a backup battery; a plurality of system components; a power switch; and a battery check circuit that is, in response to actuation of the power switch, powered during a battery test interval exclusively by the backup battery, regardless of the charge status of the main battery, the battery check circuit to determine based on the charge status of the main battery whether to supply power from the main battery to the plurality of system components, wherein the battery check circuit is to assert a power supply enabling signal if the charge status is greater than or equal to a predetermined charge level and otherwise to assert a shutdown signal prior to supplying power from the main battery to the plurality of system components. - View Dependent Claims (23)
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Specification