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BQ76930读数据问题

Other Parts Discussed in Thread: BQ76930

如题,现在在用J-LINK调试的时候,观察变量读取BQ76930的数据值,有时候突然全变成0xFF,然后马上又恢复正常,再继续观察,然后不定时又会出现所读到的数据全为0xFF,请问是因为IIC有问题么?