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bq76pl455在MCU断电后上电,通讯无应答



如题,现在调试遇到的情况是:MCU与单片机本可以正常通信,但是如果单片机断电后再重新上电,bq76pl455就无法通信,通信无应答。

就算单片机复位后也是一样。请问这到底是什么问题?

如果是芯片唤醒问题,芯片唤醒需要用什么信号?