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专利名称：Arrangement for reducing computer power
consumption by turning off themicroprocessor when inactive
发明人：Mark H. Seibert,Markus C. Wallgren申请号：US07/650053申请日：19910204公开号：US05239652A公开日：19930824
摘要：A power consumption reduction method and apparatus for a computer isdescribed. The operating system running on the CPU of the computer determines whenthe CPU is not actively processing and generates a power- off signal to a control logiccircuit. The control logic circuit then disconnects the CPU from the power supply. Pulsessent by a periodic timer or interrupts from input/output units are applied to the controllogic circuit to at least periodically issue a power-on signal to the CPU. Power is suppliedto the CPU for a given time period at every power-on signal. During this period, the CPUexecutes miscellaneous housekeeping chores including the polling of disk drives anddetermines when the CPU should resume normal processing. The control logic circuitalso determines, at every power-on signal, whether the CPU is already on or being turnedoff. The control logic circuit will not issue a reset signal to enable the reset of the CPU ifit is already on. If, however, the CPU has been turned off by the operating system, thecontrol logic circuit will reset the CPU at every periodic power-on signal until CPUresumes its normal operation.
申请人：APPLE COMPUTER, INC.
代理机构：Blakely, Sokoloff, Taylor & Zafman
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