| 摘要 |
A processor-based system in a vehicle may be quickly suspended to a lower power consumption state after detecting a signal indicative of engine cranking. Advantageously, the system may be caused to enter the lower power consumption state 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 may be called which causes device contexts to be saved before returning the system to a reduced power consumption state. Otherwise, if the operating system is inactive, an interrupt handler may be called which immediately returns the system to a reduced power consumption state. In this way, the system may be reliably restored to a lower power consumption state before being exposed to the power reduction inherent in engine cranking. |
