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ds90ub948-q1解算器I2C通讯问题

Other Parts Discussed in Thread: DS90UB948-Q1

写地址0x70/0x38,ds90ub948-q1没有发出ACK响应,波形中也没有看到。不知道怎么处理,捉急;

备注:地址应该没问题,0x00-0xfe我都试过,都没 有响应。IDX电压是1.80V应该是对应第七个挡位;