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bq25703A 输入电压设置问题

Other Parts Discussed in Thread: BQ25703A

问题:

已经确定:IIC设置BQ25703A其他寄存器值都是没有问题的。

1.设置寄存器InputVoltage Register (I2C address = 0Bh) 值为 0x26 ,读出该值为0x00;

2.现在这边想设置输入电压低于9.6v,就让电池管理芯片对整个系统掉电??

请问这是什么情况呀???