EEPW-ARM Cortex M3 DIY资料系列之——外围芯片-DS18B20.pdf DS18B20 Programmable Resolution 1-Wire Digital Thermometer DESCRIPTION User-Definable Nonvolatile (NV) Alarm The DS18B20 digital thermometer provides 9-bit Settings to 12-bit Celsius temperature measurements and Alarm Search Command Identifies and has an alarm function with nonvolatile user- Addresses Devices Whose Temperature is programmable upper and lower trigger points. Outside Programmed Limits (Temperature The DS18B20 communicates over a 1-Wire bus ……