一种支持外部控制的动态电源管理方法  

A novel method of dynamic power management for supporting external device control

作　　者：宋云雷 刘兴辉[1] 阎斌 金传恩 

机构地区：[1]辽宁大学物理学院,辽宁沈阳110036 [2]合肥科盛微电子科技有限公司,安徽合肥230088

出　　处：《电子技术应用》2017年第3期137-140,144,共5页Application of Electronic Technique

基　　金：辽宁省教育厅高等学校科研基金(L2010152)

摘　　要：为降低微控制器(MCU)应用系统的功耗,节省硬件资源,提出了一种新型的动态电源管理方法。该动态电源管理方法在支持内部软件控制MCU系统内部电源域的基础上,扩展支持了外部设备对MCU系统内部电源域的控制;外部设备能够根据实际的应用场景实时通过通信电路对MCU系统内部电源域进行开启或关断控制;通信电路使用的通信端口与外部唤醒端口复用一个IO端口。仿真结果表明,对比传统门控时钟的低功耗方法,采用该动态电源管理方法在降低驱动电机的通用MCU系统的静态功耗方面有显著作用:在脉宽调制模块(PWM)稳定工作和待机状态时,系统总静态功耗分别降低了27.43%和98.18%。有效降低了MCU的系统功耗,节省了硬件资源,提高了对MCU内部电源域控制的灵活性和高效性。In order to reduce the power consumption of a MCU system, and to save the hardware resources, a novel method of dy- namic power management is proposed. The dynamic power management method supports not only the software but also the external device to manage the power domain of the MCU system; according to the actual application scenario, the external device can power on or off the power domain of the MCU system through the communication circuit in real time; the communication IO port of the communication circuit is reused with the external wake-up IO port. Experimental results show that, compared with the traditional method of clock gating, the method of dynamic power management has a significant effect on reducing the static power consumption of a general MCU driving motor： during the pulse width modulation （PWM） module in stable operation and standby state, the total static power consumption of the MCU system is reduced by 27.43% and 98.18% respectively. The dynamic power management ef- fectively reduces the power consumption of MCU, saves the hardware resources, and improves the flexibility and efficiency of the control of power domain in MCU.

关 键 词：内部电源域控制 IO端口复用 动态电源管理 低功耗MCU 

分 类 号：TN43[电子电信—微电子学与固体电子学] TN47