新型串行E2PROM 24LC65在LonWorks节点中的应用

介绍了由MicroChip公司出品的64K位新型串行E2PROM 24LC65的功能特点及工作原理,并具体给出了这种具有I2C兼容接口的存储器在LonWorks节点中的应用实例.     

串行E^2PROM与87C51单片机接口技术的实现

介绍具有Ｉ＾２Ｃ总线结构的Ｅ＾２ＰＲＯＭ与单片机８７Ｃ５１的连接，８７Ｃ５１根据Ｉ＾２Ｃ总线的数值传输格式及时规定软件编程实现对串行Ｅ＾２ＰＲＯＭ的读写操作，简介该技术智能煤气表中的应用。     

单片机模拟I^2C总线实现串行E^2PROM的读写

在单片机系统中广泛使用Ｅ＾２ＰＲＯＭ作为数据存储器。本文简要介绍了Ｉ＾２Ｃ总线及ＡＴ２４Ｃ系列串行Ｅ＾２ＰＲＯＭ,给出了８０３１单片机与中行Ｅ＾２ＰＲＯＭ通讯的硬软件实现方法和实用读／写子程序。     

24LC32串行E^2PROM在96单处机系统中的应用

本文介绍了串行Ｅ＾２ＰＲＯＭ２４ＬＣ３２的基本情况及Ｉ＾２Ｃ总线规程，介绍了２４ＬＣ３２在９６单片机系统中应用时接口方式，同时也提供了接口程序。     

新型二线AT24C系列串行E^2PROM及其在单片机系统中的应用

该文介绍了AT24C系列串行E~2PROM的特点及与单片机的接口,用单片机的两根I/O口线模拟I~2C BUS实现对E~2PROM的读写操作,并附完整子程序,可直接使用。     

MCS—51单片机与二线制串行E^2PROM的接口方法

本文介绍二线制串行E^2PROM的操作协议及和MCS－51系列单片机的接口方法,着重讨论如何利用MCS－51的两条I／O线通过软件产生I^2C总线所需求的操作时序,以实现MCS－51对二线制串行E^2PROM的读写操作。     

I^2C总线在LonWorks网络节点上的应用

本提出一种仅用两个Ｉ／Ｏ口就在ＬｏｎＷｏｒｋｓ节点上扩展出一个Ｉ＾２Ｃ 一的子系的方法,将Ｉ＾２Ｃ 一与Ｌｏｎ－Ｗｏｒｋｓ网络相结合并给出个应用的实例。     

I^2C总线在LonWorks网络皂点上的应用

本文提出一种仅用两个Ｉ／Ｏ口就在ＬｏｎＷｏｒｋｓ节点上扩展出一个Ｉ＾２Ｃ总线的子系的方法,将Ｉ＾２Ｃ总线与ＬｏｎＷｏｒｋｓ网络相结合,并给出了一个应用的实例。     

一种多功能串行E2FROM的编程与应用

文章介绍了24C021的特性及其工作原理，以及在单片微机控制系统中的应用。     

MCS-51单片机与串行E^2PROM 24LC系列接口技术

正24LC系列为电可擦除串行CMOS E2PROM,其功耗极小,宽电源电压(2.5～5.5V),工作电流约1mA,最大静态电流为5μA。存储容量分别为:     

LonWorks智能控制节点I/O电路的设计

介绍了LonWorks现场总线控制系统和智能控制节点的开发方法,详细分析了智能控制节点中的数字量输入输出电路和模拟量输入输出电路,最后给出了在开发现场总线控制节点时要注意的若干问题及其解决方法。本文对于开发其他现场总线控制节点具有指导意义。     

基于Lonworks技术的智能小区安防节点应用开发

本文利用Lonworks技术论述了Neuron3150芯片与AT89C51单片机为核心的智能通信节点的硬件和软件设计过程。     

LonWorks现场总线多通道A/D转换控制节点的设计

介绍了LonWorks多通道A／D转换控制节点现场总线的开发方法。较详细地论述了利用MAX127开发A／D转换控制模块和利用Neuron C采集转换结果的驱动程序。     

Thermodynamic study of the KCl-K2SO4-K2Cr2O7-H2O system at the temperature 298.15 K

The Pitzerion-interaction model has been used for thermodynamic simulation of the ternary solutions KCl-K₂Cr₂O₇-H₂O, KBr-K₂Cr₂O₇-H₂O and K₂SO₄-K₂Cr₂O₇-H₂O and the quaternary system KCl-K₂SO₄-K₂Cr₂O₇-H₂O at T=298.15 K. The necessary thermodynamic functions (binary and ternary parameters of interionic interaction and thermodynamic solubility products) have been calculated and the theoretical solubility isotherms have been plotted. Good agreement between experimentally determined and calculated solubilities has been found.     

Room-temperature H2S gas sensing at ppb level by single crystal In2O3 whiskers

In₂O₃ whiskers and bipyramidal nano-crystals were prepared by a carbothermal method. These were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDX), photoluminescence and Raman spectroscopy. These were studied for application to sensing of H₂S gas. The single crystal whiskers were found to be sensitive to as low as 200 ppb of H₂S gas at room temperature and showed saturation in response at 10 ppm. On the other hand, the films made of bipyramids were less sensitive to H₂S gas and the response was found to be a nearly linear function of concentration in a concentration range of 10–80 ppm.     

Ultrahigh ethanol response of SnO2 nanorods at low working temperature arising from La2O3 loading

The influences of La₂O₃ loading on the ethanol sensing properties of SnO₂ nanorods were investigated. An obvious enhancement of response was obtained. The response of 5 wt% La₂O₃ loaded SnO₂ nanorods was up to 213 for 100 ppm ethanol at low working temperature of 200 °C, while that of pure SnO₂ nanorods is 45.1. The improvement in response might be attributed to the presence of basic sites, which facilitated the dehydrogenation process. While the working temperature was increased to 300 °C, the sensor response decreased to 16 for 100 ppm ethanol. Additionally, the La₂O₃ loaded SnO₂ nanorods sensors showed good selectivity to ethanol over methane and hydrogen. Our results demonstrated that the La₂O₃ loaded SnO₂ nanorods were promising in fabricating high performance ethanol sensors which could work at low temperature.