摘要： DS3904 包含三个数字控制非挥发性 (NV) 可变电阻器。它已将每个可变电阻器放入高阻抗状态的能力。使用此功能，就可以创建 2 线控制的 NV 数字 DIP 开关。此应用程序说明会解释创建数字 DIP 开关使用 DS3904，以及如何创建可以用于配置数字系统的 NV 产出所需的电阻设置。Maxim > App Notes > DIGITAL POTENTIOMETERS GENERAL ENGINEERING TOPICS Keywords: NV, system configuration, digital potentiometer, digipot, digital pots, NV variable resistors, dip Mar 05, 2003 switch APPLICATION NOTE 238 2-Wire Controlled Digital DIP Switch Using the DS3904 Abstract: The DS3904 contains three digitally controlled nonvolatile (NV) variable resistors. It has the capability of placing each of the variable resistors into a high-impedance state. Using this feature, it is possible to create a 2-wire controlled NV digital DIP switch. This application note will explain the resistor settings necessary to create a digital DIP switch using the DS3904, and how to create NV outputs that can be used to configure digital systems. Resistor Register Settings To place one o……