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    • 7. 发明专利
    • Fast dynamic capacitance, frequency, and/or voltage throttling apparatus and method
    • AU2021200136A1
    • 2021-12-23
    • AU2021200136
    • 2021-01-11
    • INTEL CORP
    • GENDLER ALEXANDERAMBARDEKAR AMEYAANGEL NIMRODWIJERATNE SAPUMALUAN-ZO-LI ALEXANDERSCHIFF TODVIJ VIKAS
    • G06F1/3212G06F1/324G06F1/3296
    • A dedicated pin of a processor or system-on-chip (SoC) is used to indicate whether power level (e.g., charge, voltage, and/or current) of a battery falls below a threshold. The threshold can be predetermined or programmable. The battery is used to provide power to the processor and/or SoC. Upon determining that the power level of the battery falls below the threshold, the processor by-passes the conventional process of entering low performance or power mode, and directly throttles voltage and/or operating frequency of the processor. This allows the processor to continue to operate at low battery power. The fast transition (e.g., approximately 10 pS) from an active state to a low performance or power mode, in accordance with a logic level of the voltage on the dedicated pin, reduces decoupling capacitor design requirements, and makes it possible for the processor to adapt higher package power control settings (e.g., PL4). Platform PCU Core(s) 100 101a 401 101e 402 During reset PCU enables fast LFM response in core Platform detects a low battery voltage condition Platform asserts LPMpin to request 403 low operating condition PCU indicates fastthrottle indication to core i 404 Core moves to fast LPM while taking care of other flow (e.g., T 1, GV, S1, etc.) in progress Platform detects normal battery voltage condition De-asserts LPMpin PI easrsfs PCU de-asserts fast throttle indication to core Core moves to previous V/F operating 405 point Fig. 4