利用Xilinx CoolRunner-II CPLD进行水平转换 Application Note: CoolRunner-II R Level Translation Using Xilinx CoolRunner-II CPLDs XAPP785 (v1.0) June 22, 2005 Summary As electronic design has advanced over the years, more and more I/O standards have been created. Since the days when the 5V CMOS and TTL standards were the prevalent standards with which to design logic circuits, there have been a lot of changes. Today, there are many voltage standar……