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案例頻道作者：吳波波（北京和利時智能技術(shù)有限公司，北京 100176）
摘要：工業(yè)現(xiàn)場應(yīng)用中，控制器運行期間的重要數(shù)據(jù)必須完整且不能丟失，國產(chǎn)化應(yīng)用中基于龍芯CPU的控制器已經(jīng)是行業(yè)的主流，由于龍芯CPU外圍接口的限制無法進行高速實時數(shù)據(jù)保存，則可在系統(tǒng)掉電時采用“掉電檢測+電源保持+Flash 存儲”的掉電保持方案對重要數(shù)據(jù)進行保存，確保數(shù)據(jù)不丟失。
關(guān)鍵詞：龍芯CPU；掉電檢測；電源保持；FLASH存儲
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
在線預(yù)覽：一種基于龍芯CPU的掉電保持技術(shù)及實現(xiàn)裝置
摘自《自動化博覽》2020年2月刊
北京市公安局海淀分局備案號：11010802023656號