摘要：作为替代使用的PAL ， GAL的，或CPLD器件来实现非易失性的选通功能，这些电路的存储使用串行接口控制数字电位器（ MAX5427或MAX5527 ）的门控信号（阻止或发送） 。Maxim > App Notes > Digital Potentiometers Keywords: nonvolatile gating, digital potentiometers, serial interface Jan 27, 2011 APPLICATION NOTE 4571 Simple Nonvolatile Gating By:Reinhardt Wagner Abstract:As an alternative to the use of PALs, GALs, or CPLD devices to implement a non-volatile gating function, these circuits store the gating signal (block or transmit) using a digital potentiometer (MAX5427 or MAX5527) controlled by a serial interface. A similar version of this article appeared in the September 3, 2007 issue of EDN magazine. The following describes a simple alternative to the non-volatile gating function typically implemented by a PAL, GAL, or CPLD device. To "gate" a logic signal (to block or transmit it), you usually empl……