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你好：
我现在使用UCD90120A遇到一个问题，FPGA使用I2C读取芯片的电压监控信息时，用示波器读出芯片返回的所有信息都是FF，且可以看到从机返回的ACK信号。使用TI的USB转PMBUS工具可以正常读取返回信息，请问是否I2C读取时需要特别的配置，谢谢
