Hierarchical power management unit for low power and low duty cycle devices
First Claim
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1. An apparatus comprising:
- a first Power Management Unit (PMU); and
a second PMU,wherein the first PMU is to manage transition of the apparatus from a low power state to a first active state,wherein the second PMU is to manage transition of the apparatus from the first active state to a second active state,wherein the second PMU is to be powered down while the apparatus is to be in the low power state,wherein while the apparatus is in the first active state, the first PMU is to issue a warning in response to a charge level of a battery being less than a non-critical threshold, andwherein the second PMU is to decide to pause or abort one or more pending tasks, and to return control to the first PMU, to enable the first PMU to transition the apparatus to the low power state.
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Abstract
An apparatus is provided which comprises: a first Power Management Unit (PMU); and a second PMU, wherein the first PMU is to manage transition of the apparatus from a low power state to a first active state, wherein the second PMU is to manage transition of the apparatus from the first active state to a second active state, and wherein the second PMU is to be powered down while the apparatus is to be in the low power state.
9 Citations
19 Claims
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1. An apparatus comprising:
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a first Power Management Unit (PMU); and a second PMU, wherein the first PMU is to manage transition of the apparatus from a low power state to a first active state, wherein the second PMU is to manage transition of the apparatus from the first active state to a second active state, wherein the second PMU is to be powered down while the apparatus is to be in the low power state, wherein while the apparatus is in the first active state, the first PMU is to issue a warning in response to a charge level of a battery being less than a non-critical threshold, and wherein the second PMU is to decide to pause or abort one or more pending tasks, and to return control to the first PMU, to enable the first PMU to transition the apparatus to the low power state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising:
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a battery; a memory to store instructions; a processor coupled to the memory; first power management circuitry to control a voltage level and/or a frequency level for the processor; second power management circuitry to control switching on and/or switching off of the first power management circuitry, wherein while the processor is in an active state, the second power management circuitry is to issue a warning in response to a charge level of the battery being less than a non-critical threshold; and wherein the first management circuitry is to decide to pause or abort one or more unresolved tasks, and to return control to the second management circuitry, to enable the second power management circuit to transition the processor to the low power state; and a wireless interface to allow the processor to communicate with another device. - View Dependent Claims (12, 13, 14, 15)
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16. A device comprising:
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hierarchical power management architecture comprising; first power management circuitry that is to remain switched on during one or more low power states and one or more active states; and second power management circuitry that is to remain switched off during the one or more low power states and remain switched on during the one or more active states, wherein the device has a low duty cycle of operation, wherein while the device is in an active state, the first power management circuitry is to issue a warning in response to a charge level of a battery being less than a non-critical threshold, and wherein the second power management circuitry is to decide to pause or abort one or more unresolved tasks, and to return control to the first power management circuitry, to enable the first power management circuitry to transition the device to the low power state. - View Dependent Claims (17, 18, 19)
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Specification