Description: 18B20 host control system, digital temperature display temperature conversion must be completed DS18B20 three steps: initialization, ROM instructions, the memory operation instructions. DS18B20 start the conversion must be started, read the temperature conversion value. This procedure is only attached a chip, using the default 12-bit conversion accuracy, an external power supply, read the temperature value high byte sent WDMSB unit and the low byte to send WDLSB of units in accordance with the temperature-byte format and representation the sign bit, after a simple transformation can be obtained by the actual temperature.
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