完整的USB转串口的原理图及pcb图 好用-A complete USB-serial interface easy to use schematic diagram and pcb diagram

昨天刚在网上找到一个用51单片机实现的USB读写！！内容完整得不行了！有原理图！PCB图！各种使用信息！测试软件！！强烈顶-Just yesterday the Internet to find a USB Microcontroller with 51 read and write! ! Completeness of the contents have to die! A schematic! PCB plans! A variety of usage information! Test S