摘要
单粒子效应是星载计算机工作异常和故障的重要诱因之一,国内外多颗卫星遭受到单粒子效应的危害,已造成巨大的经济损失。提出了一种片上自主恢复存储控制器结构,将EDAC技术集成在片内存储器控制器中,通过EDAC电路检测片外存储器中的数据错误,再通过自动回写机制更新片外存储器,便能保持存储器中数据的正确性。与传统的星载计算机存储器系统设计方案相比,使处理器干预主存储器纠错的频度大幅减少。集成的片上存储控制器也减少了星载计算机系统设计的负担。
Reviewing some past research[1-4],we have come to believe that SEU（single event upset） is the main reason for fault or even failure of satellite-borne computer.This paper proposes a reliable memory controller that can write corrected data back into memory automatically.Figure 2 shows the state transition for the main finite state machine,which can enter an＂error＂state to correct the error if an error is detected during a data read cycle.A memory protection register is defined and the structure of the protection unit is shown in Figure 5.Figure 6 shows the reliable data path,which uses EDAC circuit to detect and correct errors.Figure 7 shows the automatic recovery flow while Figures 8,9 and 10 analyze the behavior of the memory controller when an error occurs and it is shown that single bit error in a data can be corrected and,after correction,written back into memory automatically.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2013年第3期429-434,共6页
Journal of Northwestern Polytechnical University
基金
国家自然科学基金(61272122
61003037)
西北工业大学基础研究基金(JC201256)资助
关键词
可靠性
存储控制器
EDAC
自主恢复
controllers
design
error correction
error detection
flowcharting
reliability
automatic recovery
EDAC
memory controller
