sideA供电侧3.3V,sideB侧供电5V,sideB侧的SDA和SCL各加4.7K的上拉电阻,EN端拉高,在sideA的添加测试信号,用示波器测量发现sideA有脉冲信号输出,sideB侧使用时高电平,是哪里的问题,谢谢。

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sideA供电侧3.3V,sideB侧供电5V,sideB侧的SDA和SCL各加4.7K的上拉电阻,EN端拉高,在sideA的添加测试信号,用示波器测量发现sideA有脉冲信号输出,sideB侧使用时高电平,是哪里的问题,谢谢。
