Ultra low power architecture to support always on path to memory
First Claim
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1. An apparatus with an ultra low power architecture, comprising:
- a first power supply rail, wherein a plurality of subsystems are to be powered by the first power supply rail; and
a second power supply rail, wherein a plurality of autonomous subsystems are to be powered by the second power supply rail, wherein the second power supply rail is to be always on, always available, and low power when compared to the first power supply rail;
a coherent data path to a memory subsystem from the plurality of autonomous subsystems; and
a non-coherent data path to a memory subsystem from the plurality of autonomous subsystems.
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Abstract
An apparatus with an ultra low power architecture is described herein. The apparatus includes a first power supply rail, wherein a plurality of subsystems are to be powered by the first power supply rail. The apparatus also includes a second power supply rail, wherein a plurality of autonomous subsystems are to be powered by the power supply rail, wherein the second power supply rail is to be always on, always available, and low power.
10 Citations
22 Claims
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1. An apparatus with an ultra low power architecture, comprising:
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a first power supply rail, wherein a plurality of subsystems are to be powered by the first power supply rail; and a second power supply rail, wherein a plurality of autonomous subsystems are to be powered by the second power supply rail, wherein the second power supply rail is to be always on, always available, and low power when compared to the first power supply rail; a coherent data path to a memory subsystem from the plurality of autonomous subsystems; and a non-coherent data path to a memory subsystem from the plurality of autonomous subsystems. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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- 12. A power management integrated circuit (PMIC) of a system, operable to provide a plurality of power states, wherein the power management integrated circuit is to transition an autonomous subsystem from a sleep state to an active state, and wherein the autonomous subsystem is active and powered by a low power always on power supply that is low power when compared to other power of the system, while a second subsystem is to remain in the sleep state, wherein the low power always on power supply is to power a non-coherent data path to memory.
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17. A method for providing an ultra low power architecture, comprising:
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enabling a first path to memory on a mobile system on chip, wherein the first path to memory is powered by a main power rail and the first path to memory is a high bandwidth, high latency data path; and enabling a second path to memory on the mobile system on chip, wherein the path to memory is powered by a second low power, always on power rail, that is low power when compared to the main power rail. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification