Ds18b20 has 9bit/95ms, 12bit/750ms conversion delay.
Check this lib
https://github.com/milesburton/Arduino- ... #L310-L347
https://github.com/milesburton/Arduino- ... ersion.pde
sensors.getTempC --> 12448 us delay (12ms)
requestTemperatures --> 2153 us delay(2ms)
edited:
http://www.atmel.com/images/doc2579.pdf
https://github.com/resetnow/one-slave
https://github.com/z8k/atmel/blob/maste ... ven/main.c