搜索 - 科创

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3、内部把运行周期做成100ms或10ms，然后做一个软件修正，如100000秒后加/减一个计数单位。4、找一个高精度的时间基准进行校准，推荐用GPS的同步脉冲输出，一般的GPS模块都有，1次/秒。

MCU 在大多数 ROM 中的计数单位是千字节（KB），在 RAM 中是字节。很多 MCU 使用 Harvard 体系，程序保存在内存的一段中（通常是内部的或外部的SRAM）。

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