集成循环代码cache降低微控制器功耗研究

Research on MCU's power optimization by integrated loop code cache

功耗对于面向低成本低功耗应用的微控制器(单片机)十分重要。研究表明,CPU由于取指对程序存储器的访问功耗,构成了微控制器整体功耗的重要组成部分,而微控制器应用程序的大部分执行时间被用于执行固定的循环代码。研究了集成循环代码cache,从中执行循环代码来降低存储器访问功耗的技术。

Power consumption is now a key parameter for microcontrollers that is implented in low power, low cost embedded systems. Recent research shows that the program memory access power contributes a key part of the whole MCU power consumption. As for most MCU＇s application program, great part of nmning time was spent on executing fax loop codes. This paper studies one approach to reduce the power consumption by integrating a loop code cache to optimize the instruction fetch energy.