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bq76930芯片IIC通信问题

Other Parts Discussed in Thread: BQ76930

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现在在用bq76930芯片,发现写数据写不进去。我现在用的是IO口模拟的IIC。现象是:bq76930芯片在IIC的第9个时钟信号没有ACK相应。第9个时钟时,SDA线一直是高电平,这种现象是不对得吧?  到底哪里的问题???

希望遇到过同样问题的同仁帮忙解答一下。

谢谢!!!