如果选择有条件的将闪存作为的数据来源,只在检测到内存崩溃或者没有电池时从闪有读取数据(上电时)。建议使用此方式,因为闪存是稳定的而且不需要电池作为后备电源来保持数据。如果选择有条件的将闪存作为上电时的数据来源,在检测到内存崩溃或者程序没保存(没有电池)情况下重新上电,系统会将闪存中的逻辑/配置和或变量表数据存入RAM中。如果逻辑配置,变量存储器配置为此种模式,但是程序已经有很好的保存,则不进行闪存操作。
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