| 摘要 |
<p>A processor-based system in a vehicle may be quickly suspended to a lower power consumption state (16) after detecting a signal (10) indicative of engine cranking. Advantageously, the system may be caused to enter the lower power consumption state (16) prior to the time that power is reduced as a result of engine cranking. If the operating system is active when the signal is detected, a routine (15) may be called which causes device contexts to be saved before returning the system to a reduced power consumption state (16). Otherwise, if the operating system is inactive, an interrupt handler (14) may be called which immediately returns the system to a reduced power consumption state (16). In this way, the system may be reliably restored to a lower power consumption state (16) before being exposed to the power reduction inherent in engine cranking.</p> |
