Accelerating the microprocessor core wakeup by predictively executing a subset of the power-up sequence
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United States of America Patent
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Mar 29, 2016
Grant Date -
Mar 19, 2015
app pub date -
Sep 13, 2013
filing date -
Sep 13, 2013
priority date (Note) -
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Abstract
A mechanism is provided for an integrated circuit with power gating. A power header switch is configured to connect and disconnect any one of multiple circuits to a common voltage source, where a powered off circuit is disconnected from the common voltage source. A power-up sequencer includes an initial stages power-up component and a final stages power-up component. The final stages power-up component is configured to execute final stages of a power-up process for the powered off circuit, and the initial stages power-up component is configured to execute initial stages of the power-up process for the powered off circuit. The initial stages power-up component is activated in response to a predictive power-up request.
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