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案例频道作者：吴波波（北京和利时智能技术有限公司，北京 100176）
摘要：工业现场应用中，控制器运行期间的重要数据必须完整且不能丢失，国产化应用中基于龙芯CPU的控制器已经是行业的主流，由于龙芯CPU外围接口的限制无法进行高速实时数据保存，则可在系统掉电时采用“掉电检测+电源保持+Flash 存储”的掉电保持方案对重要数据进行保存，确保数据不丢失。
关键词：龙芯CPU；掉电检测；电源保持；FLASH存储
Abstract: In the industrial field application, important data during controller operation must be complete and cannot be lost. The controller based on Loongson CPU in the domestic applications is already the mainstream of the industry. Due to the limitation of the peripheral interface of Loongson CPU, high-speed real-time data storage cannot be performed.When the system is powered down, the power-down maintain scheme of "power-down detection + power supply + flash storage" can be used to save the important data to ensure that data is not lost.
Key words: Loongson CPU; Power-down detection; Power maintain;FLASH storage
摘自《自动化博览》2020年2月刊
北京市公安局海淀分局备案号：11010802023656号