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DS90UB947-Q1: I2C访问NACK

Part Number: DS90UB947-Q1


1、947的I2C地址理论设计值为0x1A,但读写时此地址NACK。

2、实测947_IDX引脚电源1.79V。后尝试了其他地址(Serial Control Bus Addresses For IDx)均为NACK。

3、测过947各级电压、PDB暂未发现异常。

4、请提供一下排查思路。