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BQ78350-R1通信问题

Other Parts Discussed in Thread: BQ78350, BQ76930, BQ78350-R1, BQSTUDIO, EV2400

使用BQ78350+BQ76930,两个芯片直接通信没问题,可以用示波器抓到波形,但是BQ78350的SMBus总线没有波形,电源的点的电压都是正常的,求大神帮指教一下,为什么会出现这个问题