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在官方手冊上有這么兩句話：Output data from the DS18B20 is valid for 15μs after the falling edge that initiated the read time slot. Therefore, the master must release the bus and then sample the bus state within 15μs from the start of the slot.
但技術資源，應用筆記126 用軟件實現1-Wire®通信中，卻是在15us后才采樣的？
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