Power Management Software Based on Embedded Linux System

High efficient power management scheme is implemented to reduce the embedded system's power consumption.An integrity power management software system is designed and implemented based on Advanced Power Management(APM) technology with adding the bootloader's support for the power management,modifying the Linux kernel's code to support the power management for the S3C2440 processor and system's peripheral equipment,creating a user space daemon for power management.Experiment is done on the YLP2440 development board and the experimental results show that this power management system can reduce the power consumption to 11.67% and 12.96% respectively in two typical system frequency as that of the former in the idle state.