Power Management

Power management provides the ability to control and manage the electrical power usage of a computer system or device. Power management enables systems to conserve energy by using less power when idle and by shutting down completely when not in use. For example, desktop computer systems can use a significant amount of power and often are left idle, particularly at night. Power management software can detect that the system is not being used. Accordingly, power management can power down the system or some of its components.

This chapter provides information on the following subjects:

• Power Management Framework

• Device Power Management Model

• System Power Management Model

• Power Management Device Access Example

• Power Management Flow of Control