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Installing D2XX (CDM) Drivers
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Full directions for how to install D2XX drivers for FTDI devices are provided in the appropriate driver installation guide available from the FTDI web site. Sample instructions are given below for a Windows 2000 installation, but other Windows versions are very similar.

While MProg uses the D2XX interface, FT232R, FT245R and FT2232 devices that are programmed to load a virtual COM port will also load the COM port from the CDM drivers. As BM and AM series devices do not have an EEPROM setting for this, they will install a COM port automatically.


·If a device of the same type has been installed on your machine before and the drivers that are about to be installed are different from those installed already, the original drivers need to be uninstalled. Please refer to the appropriate driver installation guide for details of how to do this.  

·Download the latest available CDM drivers from the FTDI web site and unzip them to a location on your PC.  

·Connect the device to a spare USB port on your PC. If the device is based on an FT2232 device, the Microsoft composite device driver is automatically loaded first.  

   composite device


·Once the composite driver has been installed the Found New Hardware Wizard will launch. Click "Next" to proceed with the installation.  

   bus fnhw 1


·Select "Search for a suitable driver for my device (recommended)" as shown below and then click "Next".  

   bus fnhw 2


·Check the box next to "Specify a location" and uncheck all others as shown below.  

   bus fnhw 3


·Clicking "Next" displays a dialog box for you to enter to the location of the drivers.  

   bus fnhw 4


·Click "Browse" to display an open file dialog box.  

   bus fnhw 5


·Locate the folder containing the latest drivers downloaded from the FTDI web site above and click "Open", then click "OK". The PC autoselects the correct INF file, in this case FTDIBUS.INF. Once Windows has found the required driver .INF file, click "Next" to proceed.  

   bus fnhw 6


·Windows should then display a message indicating that the installation was successful. Click "Finish" to complete the installation for the serial converter driver for this port of the device. The COM port emulation driver must be installed after this has completed.  

   bus fnhw 7


·If the device is based on the FT2232, the Found New Hardware Wizard will continue by installing the USB Serial Converter driver for the second port of the FT2232 device. The procedure for installing the second port is identical to that for installing the first port from the first screen of the Found New Hardware Wizard. If the device is not based on the FT2232, the COM port emulation driver is loaded as indicated in the following steps. Click "Next" to proceed with the serial port installation.  

   port fnhw 1


·Select "Search for a suitable driver for my device (recommended)" as shown below and then click "Next".  

   port fnhw 2


·Check the box next to "Specify a location" and uncheck all others as shown below.  

   port fnhw 3


·Clicking "Next" displays a dialog box for you to enter to the location of the drivers.  

   port fnhw 4


·Click "Browse" to display an open file dialog box.  

   port fnhw 5


·Locate the folder containing the latest drivers downloaded from the FTDI web site above and click "Open", then click "OK". The PC autoselects the correct INF file, in this case FTDIPORT.INF. Once Windows has found the required driver .INF file, click "Next" to proceed.  

   port fnhw 6


·Windows should then display a message indicating that the installation was successful. Click "Finish" to complete the installation for this port of the device.  

   port fnhw 7


·If the device is based on the FT2232, the second port must also be installed. Under Windows 2000, this will occur automatically.  

·By examining the Device Manager (located in "Control Panel\System" then select the "Hardware" tab and click "Device Manger…") and viewing by connection ("View > Devices by connection"), the device appears as a "USB Serial Converter" with an additional COM port with the label "USB Serial Port". If the device is based on the FT2232, two ports will be available from a composite USB device.  

   device manager


·In the case of the FT2232, port A of the FT2232 will be installed as COMX and port B will be installed as COMX+1 where COMX is the first available COM port number.