數(shù)字溫度傳感器外文翻譯6-wenkub
2023-05-19 01:47:21 本頁面
【正文】 d on the parasite power capacitor (C ) to provide power when the bus is low. When the DS18B20 is used in parasite power mode, the VDD pin must be connected to ground. In parasite power mode, the 1Wire bus and CPP can provide sufficient current to the DS18B20 for most operations as long as the specified timing and voltage requirements are met. However, when the DS18B20 is performing temperature conversions or copying data from the scratchpad memory to EEPROM, the operating current can be as high as . This current can cause an unacceptable voltage drop across the weak 1Wire pull up resistor and is more current than can be supplied by CPP. To assure that the DS18B20 has sufficient supply current, it is necessary to provide a strong pull up on the 1Wire bus whenever temperature conversions are taking place or data is being copied from the scratchpad to EEPROM. DS18B20 數(shù)字溫度傳感器提供 912 位的分辨率而且還有一種報(bào)警功能，它內(nèi)部有非易失的用戶可編程的單元用來設(shè)置溫度的上限和下限。C to +85176。英文參考資料 The DS18B20 Digital Thermometer provides 9 to 12–bit centigrade temperature measurements and has an alarm function with nonvolatile userprogrammable upper and lower trigger points. The DS18B20 municates over a 1Wire bus that by definition requires only one data line (and ground) for munication with a central microprocessor. It has an operating temperature range of –55176。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 64bit serial code, which allows multiple DS18B20
畢業(yè)設(shè)計(jì)相關(guān)推薦
鄂ICP備17016276號(hào)-1