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BQ76942: 使用EV2400连接BQ studio时,检测不到芯片

Part Number: BQ76942
Other Parts Discussed in Thread: EV2400, , BQSTUDIO

使用环境:EV2400版本为0.32;BQ studio版本为1.3.102。

问题:BQ76942和MCU的I2C连接方式见附件电路图。现在测试发现BQ76942的I2C和MCU的I2C只要连接在一起,从I2C引线使用EV2400去和BQ studio通讯,就提示检测不到芯片;把串的100R电阻去掉,从BQ76942直接引出I2C就可以成功通讯,而且可以正常操作。请问这是什么原因?有哪些因素会影响BQ76942的I2C通讯?MCU供电从REG1取电,测试时是空程序。AA.pdf