Copyright © 2010 Future Technology Devices International Limited

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Document Reference No.: FT_000204

DB9-USB-RS232 Datasheet

Version 1.2

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 COMn assignment. In the figure below, the DB9-USB-RS232 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-RS232 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.