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TMP1075: 32路扩展的问题

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Prodigy 10 points
Part Number: TMP1075

我现在一路总线上挂了32路tmp1075，1、设计时地址是用硬件选通的，比如选通第一路tmp1075时，A0应该与SDA连接上，这两个是直接短接还是中间要串个电阻呢？  2、一路总线外挂32路，Cb应该如何计算，上拉电阻需要变吗，本来一路是5K的？