有关USB转串口的许多电路图，为鄙人平常累积，希望大家可以作为参考-Of the many USB to serial circuitry for the cumulative normal I hope we can serve as a reference

This schematics of a standard ISP programmer for AVR chips, except that it includes a USB interface-This is schematics of a standard ISP programmer for AVR chips, except that it includes a USB interface