[an error occurred while processing this directive]
|
If the DS18B20 is powered by an external supply, the master can issue “read
time slots” (see the 1-WIRE BUS SYSTEM section) after the Convert T command and the DS18B20 will
respond by transmitting 0 while the temperature conversion is in progress and 1 when the conversion is
done. If the DS18B20 is powered with parasite power, this notification technique cannot be used since
the bus must be pulled high by a strong pullup during the entire temperature conversion.