Datasheet
  Copyright © 2011 Future Technology Devices International Limited  13 
Document Reference No.: FT_000204 
DB9-USB Datasheet 
Version 2.1 
Clearance No.: FTDI# 130 
4  Installation 
4.1  Device Driver Installation 
The drivers for the DB9-USB modules are available for download from: 
www.ftdichip.com 
The following section illustrates an example installation on the Windows OS. 
4.1.1 Microsoft Windows Installation 
With the device drivers being Windows Hardware Quality Labs (WHQL) certified, they are also available 
through download directly from the Microsoft
®
 Windows
®
 Update service. Additional installation options 
are noted below: 
Installation Executable shown on Windows XP 
1)  Login to the system as Administrator, or a user with Administrator rights. 
2)  Prior to connecting the DB9-USB module to the USB Host or Hub port, download the latest device 
driver version from the FTDI Chip web site. 
3)  Run this executable to install the device drivers. 
4)  Connect the DB9-USB module to your computer. A notification will appear near the task bar 
indicating that new hardware has been installed and is ready for use. It is normal if this notice 
appears twice. 
Figure 3.1 – Hardware Ready 
Windows Update shown on Windows XP 
You must have an active Internet connection and the Windows Update Service enabled. 
1)  Connect the DB9-USB module to your USB Host or Hub.  
2)  The “Found New Hardware” Wizard will appear. The first dialog should ask whether it is 
acceptable to use the Windows Update Service to find the device driver. 
Figure 3.2 – Found New Hardware Wizard 
3)  Select one of the “Yes” choices and click “Next”. 










