MC75的USB驱动，安装后可以把MC75的USB添加为一个串口，进行AT命令收发。同时会生成一个modem，可以直接用它拨号。,The USB driver MC75, MC75 after installation of the USB can be added as a serial port for AT commands to send and receive. At the same time will generate a modem, can directly use it to

FTDI232 Chip (USB to Serial) convertor driver for BASCOM AVR. (BASIC Language) This sample driver gives you the ability to send text to USB port or read available chars from the USB port. Written in BASCOM AVR 1.11.9.x

通用USB转串口驱动，用于串口下载程序（而现在很多主机和笔记本都没串口），这是需用到，PL2303-Universal USB-serial driver for the serial download (and now a lot of hosts and laptop no serial port), which is need to rely on, PL2303

Z-TEK USB转RS232串口驱动文件，刚刚在网上找到的，是官方最新发布的版本2.06 希望对大家有些用-Z-TEK USB switch to RS232 serial port driver files, just find on the Internet is the latest official release of version 2.06 you want to be of some use