ZERO-POWER EVENT DETECTOR
First Claim
1. A system configured to detect an event while the system is powered off, the system comprising:
- an input that is configured to receive an electrical signal created by an event, even while the system is powered off,a zero-power event memory configured to;
operate in a first state that indicates no event has occurred;
operate in a second state that indicates an event occurred; and
use the electrical signal created by the event to switch from the first state to the second state, thereby storing an indication that the event occurred; and
a read subsystem that is configured to, when the system powers on, access the zero-power event memory and determine whether or not an event occurred while the system was powered off.
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Accused Products
Abstract
Disclosed herein are systems and methods for detecting an event while a powered system is powered off. An exemplary system comprises an event input that is configured to detect an electrical signal created by an event while the system is powered off; a zero-power event memory configured to receive the electrical signal from the event input and use the electrical signal to store an indication that the event occurred, wherein the zero-power event memory is configured to store the indication that the event occurred at least until the system next powers on; a read subsystem that is configured to, when the system powers on, access the zero-power event memory and determine whether or not an event occurred while the system was powered off; and a reset subsystem that is configured to, when the system powers off, cause the zero-power event memory to reset to a state indicating that no event has occurred. Further, the system may comprise an event response subsystem configured to take appropriate responsive actions when an event is detected.
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Citations
20 Claims
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1. A system configured to detect an event while the system is powered off, the system comprising:
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an input that is configured to receive an electrical signal created by an event, even while the system is powered off, a zero-power event memory configured to; operate in a first state that indicates no event has occurred; operate in a second state that indicates an event occurred; and use the electrical signal created by the event to switch from the first state to the second state, thereby storing an indication that the event occurred; and a read subsystem that is configured to, when the system powers on, access the zero-power event memory and determine whether or not an event occurred while the system was powered off. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for zero-power detection of an event that occurs while a powered device is powered off, wherein the method is carried out, at least in part, by a zero-power event detection system communicatively coupled to the powered device, the method comprising:
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providing an input configured to receive at least one electrical signal that is generated by the occurrence of one or more events, wherein each electrical signal defines a voltage, and wherein the input is operable to receive the electrical signal while the powered device is powered off; applying the voltage of the electrical signal to a zero-power event memory, wherein the zero-power event memory comprises a capacitor, wherein the capacitor is discharged prior to the occurrence of the event, and wherein the application of the first voltage to the zero-power event memory charges the capacitor; the capacitor storing the charge from the application of the first voltage until the powered device powers on; and in response to the powered system powering on, querying the zero-power event memory as to whether or not an event occurred while the powered device was powered off and providing an indication as to whether or not an event occurred to the powered device. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A system configured to detect an event while the system is powered off, the system comprising:
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an event input that is configured to detect an electrical signal created by an event while the system is powered off, a zero-power event memory configured to receive the electrical signal from the event input and use the electrical signal to store an indication that the event occurred, wherein the zero-power event memory is configured to store the indication that the event occurred at least until the system next powers on; a read subsystem that is configured to, when the system powers on, access the zero-power event memory and determine whether or not an event occurred while the system was powered off; and a reset subsystem that is configured to, when the system powers off, cause the zero-power event memory to reset to a state indicating that no event has occurred. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification