DSP for Embedded and Real-Time Systems

Chapter 13

Software Optimization for Power Consumption

Andrew Temple

Chapter Outline

Introduction

Understanding power consumption

Static versus dynamic power consumption

Static power consumption

Dynamic power consumption

Measuring power consumption

Measuring power using an ammeter

Measuring power using a Hall Sensor type IC

Voltage regulator module power supply ICs

Profiling your application’s power consumption

Minimizing power consumption

Hardware support

Low power modes

Freescale’s MSC815x low power modes

Texas Instruments C6000 low power modes

Clock and voltage control

Considerations and usage examples of low power modes

Low power example

Optimizing data flow

Reducing power consumption for memory accesses

DDR overview

DDR data flow optimization ...