微机保护中VxWorks系统对SDRAM芯片自检功能的实现

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Abstract The microcomputer-based relaying protection devices of secondary equipment in power grid system, needs a stable and reliable operation. Except the lockout relay breaks down, the device should not result in operating erroneously or failing whenever any components inside the device get failure. In recent years, the relay protection device manufacturers are gradually using SDRAM for program and data memory, but the SDRAM chip does not have automatic detection and correction functions, and the large-capacity SDRAM is susceptible to electromagnetic interference. Wrong instruction will cause unpredictable result, and wrong data will also be a seriously threat to system security, so it is necessary to have method to monitoring SDRAM. Therefore, as a key component in the relay protection equipment, the self-checking of SDRAM chip during normal operation will be important and urgent. This paper presents a SDRAM chip self-checking method during the embedded system running, this method has been verified in application, and widely used in company equipments.

Key words： VxWorks SDRAM Self-checking of SDRAM chip

Received: 26 June 2014 Published: 23 January 2014

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	Articles by authors
	Chen Lei
	Yang Zhen
	Liu Xi
	Chen Lei

Cite this article:

Chen Lei,Yang Zhen,Liu Xi等. SDRAM Chips under the VxWorks Implementation of Self-check Function[J]. Electrical Engineering, 2013, 14(11): 77-81.

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http://dqjs.cesmedia.cn/EN/Y2013/V14/I11/77