Datasheet

Copyright © 2011 Future Technology Devices International Limited 15
Document Reference No.: FT_000204
DB9-USB Datasheet
Version 2.1
Clearance No.: FTDI# 130
COM Port Assignment
Next, to determine which COM port has been assigned, open the Windows Device Manager from the
System Control Panel.
Figure 3.6 – Device Manager
Click on the Plus “+” sign next to the Ports tree to list the available COM port. You will see “USB Serial
Port”, followed by a COM assignment. In the figure below, the DB9-USB module is assigned to COM3.
Figure 3.7 – COM Port Assignment
Use this COM port number with your application software in order to access the DB9-USB module.
If an application requires use of a different COM port number, the assignment may be changed through
the Advanced Driver Options settings.
From the Device Manager listing above, right-click on the USB Serial Port and select Properties.