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F28377D开发板问题

Other Parts Discussed in Thread: CONTROLSUITE

刚更新了controlsuite 3.3.1,发现F28377D的controlcard 有一个更新,是在AD参考VREFHI部分电路有一个变动,如下图

比以前的原理图增加了R80-R83,请问这四个电阻有什么用,这里的560m是指的560兆欧吗?谢谢