中英文对照外文文献 DS18B20中英文资料外文翻译文献.doc

中英文对照外文文献 DS18B20中英文资料外文翻译文献 中英文资料 The introduction to The DS18B20 1. DESCRIPTION The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with nonvolatile user programmable upper and lower trigger points. The DS18B20 communicates over a 1-Wire bus that by definition requires only one data line for communication with a central microprocessor. It has an operating temperature range of -55癈 to +125癈 and is accurate to ?.5癈 over the range of -10°C to +85°C. In addition, the DS18B20 can derive power directly from the data line (―parasite power‖), eliminating the need for an external power supply. Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems. 2.FEATURES ? Unique 1-Wire? Interface Requires Only One Port Pin for Communication ? Each Device has a Unique 64-Bit Serial Code Stored in an On-Board ROM ? Multi-drop Capability Simplifies Distributed Temperature-Sensing Applications ? Requires No External Components 1