Microprocessor unit capable of multiple power modes having a register with direct control bits and register pointer bits for indirect control
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United States of America Patent
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Jul 28, 2015
Grant Date -
Feb 13, 2014
app pub date -
May 3, 2010
filing date -
May 4, 2009
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Abstract
A power mode control system for microprocessors offers an unlimited variety of hardware-supported power modes that may satisfy any operating scenario. The microprocessor unit comprises a register that contains particular bit fields for defining selectable power modes. The particular bit fields in the register define pointers to a power mode defining register. Each pointer selects a corresponding bit field in the power mode defining register. The bits in the bit fields of the power mode defining register either directly control a power mode of at least one functional or peripheral blocks of the unit; or they are pointers to a further power mode defining register and the bits in the bit fields of the further power mode defining register directly control a power mode of at least one functional or peripheral blocks of the unit.
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