Copyright © 2008-2014 Future Technology Devices International Limited
3
Document Reference No.: FT_000073
Advanced Driver Options AN_107 Application Note
AN_107 Version 2.53
Clearance No.: FTDI# 63
6.7
Changing the Driver Priority .................................................... 22
6.8
Specifying the COM Port Allocation Start Value ....................... 23
6.9
USB Selective Suspend ............................................................ 24
7
System Options ............................................................. 25
7.1
Ignore Hardware Serial Number .............................................. 25
7.2
Phantom Devices ..................................................................... 25
8
Foreign Language Support ............................................ 27
9
Co-Installer ................................................................... 28
10
Renaming Driver Files ................................................... 29
11
Driver Pre-Installation .................................................. 30
11.1
DPInst Packages ..................................................................... 30
12
Uninstalling Drivers ...................................................... 32
13
Contact Information ...................................................... 33
Appendix A – Appendix ........................................................ 1
A.1 FTDIBUS.INF ............................................................................... 1
A.2 FTDIPORT.INF ............................................................................. 4
Appendix B - Revision History .............................................. 9
Copyright © 2008-2014 Future Technology Devices International Limited
4
Document Reference No.: FT_000073
Advanced Driver Options AN_107 Application Note
AN_107 Version 2.53
Clearance No.: FTDI# 63
1
Introduction
This application note describes advanced driver settings and operations for FTDI's CDM Windows
driver. This is intended to be a reference for experienced engineers developing products
incorporating FTDI devices and drivers who are experts with FTDI devices.
If you are unsure about any of the features described in this document, please do not change any
of your driver files or registry settings and seek assistance from
FTDI Support
.
Copyright © 2008-2014 Future Technology Devices International Limited
5
Document Reference No.: FT_000073
Advanced Driver Options AN_107 Application Note
AN_107 Version 2.53
Clearance No.: FTDI# 63
2
CDM USB Serial Converter Properties Page
With the CDM driver, a property page is now available for the USB Serial Converter driver. This is
at the same level as the original D2XX driver.
Figure 2.1 USB Serial Converter Properties
2.1
Loading the COM Port Driver
In the case of FT232R, FT245R and FT2232 devices, the driver type is determined by a setting in
the device EEPROM. The Advanced tab allows the user to override any EEPROM settings to select
the driver type. The EEPROM settings can be overridden using the check box shown below:
This option can also be configured as a default value via the FTDIBUS.INF file before installation as
indicated in
FTDIBUS.INF Options
. If this is set, the EEPROM driver setting will be ignored.
2.2
USB Selective Suspend
The USB Serial Converter driver supports USB Selective Suspend, a feature that allows the system
to suspend devices that are not in use and thus reduce overall power consumption. This option is
enabled when the “Enable Selective Suspend” checkbox is checked. The period of inactivity used
to determine that the device is not in use is selected from values ranging between 1 second and 1
hour that are presented in the “Idle Timeout” pull-down box. The default value for the Idle
Timeout is 5 seconds.
Copyright © 2008-2014 Future Technology Devices International Limited
6
Document Reference No.: FT_000073
Advanced Driver Options AN_107 Application Note
AN_107 Version 2.53
Clearance No.: FTDI# 63
Note that “Load VCP” must be unchecked in order to enable Selective Suspend.
