DS1990A-F3+: FAQ

DS1990A-F3+: FAQ
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    iButton的ROM ID码是多少？

    ROM ID码是64位唯一ROM编码。该编码由工厂光刻至每片1-Wire 器件。这样可确保绝对可溯源，因为任何两片器件的编码都不相同。其中前8位是1-Wire家族码，接下来48位是唯一的序列码，最后8位为前56位的CRC。

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