Publisher Summary Embedded multimedia design is not complete without a thorough analysis of the power supply architecture. There are a number of ways to tune the power profile of a system to meet application requirements. This chapter discusses specific processor features derived from Blackfin's Dynamic Power Management subsystem and examines important relationships among frequency, voltage, and power in an embedded processor. The subsysytem features that allow manipulations in clock rates and voltages to optimize a system's power profile for a given activity level include: a facility for dynamically changing frequency and voltage; flexible power management modes; separate power domains; efficient architectural constructs; software profiling tools; and intelligent voltage regulation. Many applications involve a set of operating modes that differ markedly with respect to processing needs. Processors differ in the exact power modes they implement, but there are usually some commonalities among platforms. Blackfin processors have distinct operating modes (corresponding to different power profiles) that provide selectable performance and power dissipation characteristics. The “sleep” mode requires no computational power and the processor reads in sporadic packets of telemetry data. There could also be a “standby” or “hibernate” mode that provides ultra-low power dissipation, when no sensor information is expected and no processing is required. One of the means of reducing power consumption for a given application is to choose an efficient processor architecture for that application. The features such as specialized instructions and fast memory structures can reduce power consumption significantly by lessening overall algorithm execution time. Battery selection is a very important process that takes into account peak and average energy needs, device form factor, time between recharges and replacements, and voltage requirements. The chapter also briefly describes the fundamentals of batteries and their types: primary and rechargeable.