这是一段i/o口驱动电路仿真图，从网上下了以后经过自己的修改觉得很不错，现在传上去，希望给需要的人提供一些帮会。-This is a period of i/o port driver circuit simulation map, from the Internet after the next revision after their own feel very good, Chuan-up now and hope to those who need to provide some sec