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如果是从，设备地址是什么呢？我看其他芯片是0x16，发送这个地址都是NACK啊，这个通信到底怎么搞的？？？
SMBus肯定是主从的。这种情况，先确认芯片是否已经开始正常工作，各个LDO的输出是否正常。
