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关于hdc1080温湿度传感器的几个问题

Other Parts Discussed in Thread: HDC1080

hdc1080 datasheet中提到一个Pointer Register,但没找到这个Pointer Register的地址,看代码好像是直接往hdc1080的地址1000000里写想要访问的寄存器地址就行了,请问,这个Pointer Register究竟怎么使用呢?