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CC2541 ADC 18B20

Other Parts Discussed in Thread: CC2541

最近使用CC2541利用P0_5测量DS18B20,P0_6采集AD值,结果发现正常测量DS18B20时得到的AD值,与不测量DS18B20(DS18B20断电,并且P0_5输出低电平)时得到的AD值差别较大。请问是什么原因导致的呢?