Title:
Design-and-Realization-of-DS18B20
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- Category:
- SCM
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- File Size:
- 243kb
- Update:
- 2012-11-26
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- zhait
Description: A method of the automatic identification of multiple DS18B20 digital thermometers on a 1一W ire bus has been offered
by designing a circuit composed of a 74LS138 decoder，two 74LS00P quad 2-input NAND gates and two CIM066 quad bilateral
switchs，and writing programs using Keil C51 for accessing these DS18B20s．Under the control of SCM ，the system reads and
stores all DS18B20s’ROM codes in the form of initialization after the system is powered on，and then identifies the thermometers
automatically and measures the muthi—point temperature．The experiment result shows a one—to—one correspondence between the
DS18B20s’ROM codes is read and the temperature measuring points，which enables the therm ometers’plug and play．So the sys—
tern realizes the automatic identification in the real sens
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单总线数字温度传感器DS18B20自动识别的设计与实现.pdf
