基于SEP0611的电源管理驱动设计  

Power Management Driver Based on SEP0611

作　　者：张跃[1] 凌明[1] 

机构地区：[1]东南大学国家专用集成电路系统工程技术研究中心

出　　处：《电子技术（上海）》2011年第12期54-56,共3页Electronic Technology

基　　金：国家核高基资助项目

摘　　要：休眠模式是减少嵌入式系统功率消耗的一种运行模式。一般来说,系统处于休眠模式时,不执行任何功能,在一定时期内没有用户请求产生,因此它可以最大限度地减少其不必要的功耗。在文章中,硬件平台采用东南大学自主研发的SEP0611嵌入式微处理器,软件平台采用Linux2.6.32内核,设计并实现了电源管理驱动。在SEP0611电源管理驱动中,使系统进入休眠模式的代码负责保存芯片状态、自刷新DDR;使系统退出休眠模式的代码负责使得DDR退出自刷新状态、恢复芯片状态,以使系统返回正常模式。通过在测试板上让系统进入休眠并唤醒系统、同时测试系统休眠前后各路电路的电流值,从而验证了该驱动的准确性。Sleep mode is an operation mode for reducing power consumption of an embedded system.In general,sleep mode is entered at the moment that a system doesn＇t execute any function,i.e.no user request occurs during certain period of time,so it can minimize its unnecessary power consumption.In this paper,SEP0611 embedded microprocessor is used as the hardware platform,and Linux 2.6.32 is employed in the software platform employs,so that the Power Management（PM） driver of SEP 0611 in Linux is accomplished.The accuracy of the driver is tested and verified through making test-board sleep and wake-up and measuring the current value of each circuit simultaneously.In SEP0611 PM Driver,the supported codes for entering Sleep mode are codes for saving internal state of chip and for making DDR in self-refresh state and for returning back to normal mode by restoring the saved chip＇s state after exiting Sleep Mode.

关 键 词：休眠 高级电源管理 嵌入式LINUX SEP0611处理器 

分 类 号：TN86[电子电信—信息与通信工程]