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MCU与BQ4050通信



大家好!我用单片机模拟IIC与BQ4050SMBUS通信,写地址0X16  有ACK信号但是发送0X0D寄存器地址无ACK信号,通信频率45KHZ 。                                            

各们帮忙分析一下原因。外部有接10K 上接  MCU供电是3.3V

                                      图1  0x0d波形

                                                   图2  0X16波形