摘要： DS1867是一个数字电位器使用EEPROM存储器存储电位器设置，当设备断电。设备的写入过程发生在掉电周期，使该设备“记住”它的最后一个电位器设定在未来的电周期。读写EEPROM的过程，需要一段时间的最低数额，而这往往是长于电源设备在断电在一些应用中。如果是这种情况，需要外部电路提供电源，以保证在掉电周期写入EEPROM正确。给出了一个例子电路，显示此配置。Maxim > App Notes > DIGITAL POTENTIOMETERS Keywords: digitpot Epot, EEPOT, digital pot, DS1867, digital pots, digital potentiometers Apr 30, 2001 APPLICATION NOTE 87 DS1867 Power Supply Conditioning for EEPROM Wiper Storage Abstract: The DS1867 is a digital potentiometer that uses EEPROM memory to store potentiometer settings when the device is powered off. The write process to the device occurs during the power-down cycle so that the device "remembers" it's last potentiometer setting during the next power-up cycle. The process of writing EEPROM takes a minimum amount of time, which can often be longer than power is available to the device during power-down in some applications. If this is the case, external circuitry is required to supply power during the power-down cycle to ……