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reset被拉低肯定会造成复位。但是为什么reset拉低的同时供电电压也会出现被拉低的情况,这个我觉得你这边需要排查一下。
至于reset被拉低的原因,我看到你说是屏蔽了看门狗的,芯片TRM的3.3.1 Reset Sources有列举几个复位源,你看一下有没有可能造成复位的原因