Samsung S5PC100 User Manual page 274

INTELLIGENT ENERGY MANAGEMENT
These parts of the system cooperate with each other to optimize power consumption, without compromising on
performance or responsiveness.
Simply, an IEM system works as follows:
•
When the IEM software starts, it registers some kernel hooks with the OS.
•
The OS uses these hooks to call the IEM software. It does so whenever a system event occurs that might
influence the optimum performance level.
•
The IEM software records information about the events that occur, and the tasks related to them.
•
The policies that are a part of the IEM software analyze this information to determine the optimum
performance level.
•
Whenever the optimum performance level changes, the IEM software uses the performance scaling hardware
to set the new level.
1.1 FEATURE
•
Up to eight energy level control
•
Up to eight frequency level control
•
Up to eight voltage level control
•
Low power mode support
2.5-2
S5PC100 USER'S MANUAL (REV1.0)