A USB to serial port tool design information, are well documented. Containing circuit schematics, circuit diagrams is very simple, PC machine drivers, as well as the conversion of Chinese ic information. The author of original, strongly recommend

Filename	Size	Update
USB_TO_COM(232&485)
...................\CH341PC驱动
...................\...........\DRIVER
...................\...........\......\CH341PT.DLL
...................\...........\......\CH341S98.SYS
...................\...........\......\CH341SER.INF
...................\...........\......\CH341SER.SYS
...................\...........\......\CH341SER.VXD
...................\...........\INSTALL
...................\...........\.......\DLL_LIB
...................\...........\.......\.......\CH341PT.BAS
...................\...........\.......\.......\CH341PT.H
...................\...........\.......\.......\CH341PT.LIB
...................\...........\.......\.......\CH341PT.PAS
...................\...........\.......\README.TXT
...................\...........\.......\模块调试.EXE
...................\CH341芯片中文手册
...................\.................\CH341DS1.pdf
...................\.................\CH341DS2.pdf
...................\USB 总线转接芯片CH341说明
...................\.........................\CH341 USB转串口	转打印口	转并口	转同步串口.files
...................\.........................\...................................................\bg(flash).jpg
...................\.........................\...................................................\dateBg.gif
...................\.........................\...................................................\navigateProduct.jpg
...................\.........................\CH341 USB转串口	转打印口	转并口	转同步串口.htm
...................\电路原理图

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