基于DVS机制的低能耗微处理器系统设计方法研究

能耗已经成为微处理器设计的最大挑战之一。微处理器的能耗在便携设备中占有重要的比例。DVS（Dynamic Voltage Scaling）机制可以在设备运行过程中，通过降低处理器的工作电压来降低它的能耗。同时，还需降低处理器的速度。电压调度程序通过分析应用的约束和需求来给定适当的工作电压。文章论述了速度和输入电压可变的微处理器系统设计方法。在处理器低速工作时，降低工作电压可以大幅度降低它的能耗。这将使应用系统能快速地根据负荷的变化调节处理器的性能。

The Research of the Method Using DVS Mechanism in the Low Energy Consumption Microprocessor System Design

： Energy consumption has become one of the biggest challenges in microprocessor design．Microprocessors represent a significant portion of the energy consumed in portable electronic devices．Dynamic Voltage Scaling（DVS）allows a device to reduce energy consumption by lowering its operating voltage at run－time，requiring a corresponding reduction in processor speed．A voltage scheduler determines the appropriate operating voltage by analyzing application constraints and requirements．This paper describes a system with a microprocessor whose speed can be varied（frequency Scaling）as well as its input voltage．Voltage scaling is important for reducing power consumption to very low values when operating at low speeds．This allows applications to quickly adjust the performance level of the processor whenever the workload changes．