AN 126 User Guide For

Future Technology Devices International Ltd.
Application Note AN_126
User Guide For FT232B/R Factory Test Utility
Document Reference No.: FT_000176
Version 1.0
Issue Date: 2009-10-20
This application note explains how to use the FT232B or FT232R factory test utility which
provides a user interface to program and test FTDI FT232B or FT232R devices.
The accompanying software, ST232_ver1.4, replaces the previous FTDI utility (ST232R and
ST232-245) used for this purpose.
Future Technology Devices International Limited (FTDI)
Unit 1,2 Seaward Place, Glasgow G41 1HH, United Kingdom
Tel.: +44 (0) 141 429 2777 Fax: + 44 (0) 141 429 2758
E-Mail (Support): support1@ftdichip.com Web: http://www.ftdichip.com
Copyright © 2009 Future Technology Devices International Limited
Document Reference No.: FT_000176
User Guide For FT232B/R Factory Test Utility Application Note AN_126
Version 1.0
Clearance No.: FTDI# 111
Table of Contents
1
Introduction .................................................................... 2
2
Hardware Configuration .................................................. 3
3
Utility Basics ................................................................... 6
3.1
4
Operation .................................................................................. 6
Edit EEPROM.ini Parameters............................................ 9
4.1
VID/PID ID ............................................................................. 10
4.2
Description ............................................................................. 11
4.3
Power selection ...................................................................... 11
4.4
USB Remote Wakeup .............................................................. 12
4.5
Serial number ......................................................................... 12
4.6
Other settings ......................................................................... 13
5
Definition of Error Messages ......................................... 14
6
Contact Information ...................................................... 17
Appendix A - Revision History ............................................ 19
Copyright © 2009 Future Technology Devices International Limited 1
Document Reference No.: FT_000176
User Guide For FT232B/R Factory Test Utility Application Note AN_126
Version 1.0
Clearance No.: FTDI# 111
1
Introduction
The ST232_ver1.4 program is intended for use in a FT232B or FT232R manufacturing test
environment. ST232_ver1.4 replaces the previous FTDI utility used for this purpose called ST232R and
ST232-245. It has a single button user interface and returns a simple pass or fail for USB - RS232
designs. The executable version is hard-coded for use with the default VID (0x0403) and PID (0x6001)
and it can also support other VID and PID combinations by EEPROM.ini modification. The source code for
this program is provided on the FTDI website at the C++ Builder examples page and can be built by C++
Builder 2009. The test program also requires a special cable to operate correctly.
The features of ST232_ver1.4 are:
1. Auto-detect FT232B and FT232R
2. Support two testing methods: Y cable (The same with old method) and COM2 direct testing.
3. Selection test only or programming and testing.
4. Support EEPROM data programming by EPPROM.ini file or FTDI default.
The EEPROM.ini file will be generated automatically.
5. Restore current setting
ST232_ver1.4 is available as a free download from the Utilities page of the FTDI website.
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Document Reference No.: FT_000176
User Guide For FT232B/R Factory Test Utility Application Note AN_126
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2
Hardware Configuration
EEPROM Configuration:
The FTDI FT232R device has an integrated 1024 Bit EEPROM, but the FT232B does not have such an
integrated EEPROM. It requires an external 93C46 EEPROMs organized in 16-bit words. The FT232B also
supports the 93C56 and 93C66 EEPROMs organized in 16-bit words.
CABLE Configuration:
This utility supports two testing methods. Both require a cable to be manufactured. Users require to
select one test method and manufacture the appropriate cable. The following details the DB9 female
connections for this cable:
1. Y cable (The same with old method):
USB(DUT)Serial Pin 3 (TXD) to COM2 Pin 2 (RXD)
USB(DUT)Serial Pin 2 (RXD) to COM2 Pin 3 (TXD)
USB(DUT)Serial Pin 7 (RTS) to COM2 Pin 8 (CTS)
USB(DUT)Serial Pin 8 (CTS) to COM2 Pin 7 (RTS)
USB(DUT)Serial Pin 6 (DSR) to COM2 Pin 4 (DTR)
USB(DUT)Serial Pin 5 (GND) to COM2 Pin 5 (GND)
USB(DUT)Serial Pin 4 (DTR) to COM2 Pin 6 (DSR)
USB(DUT)Serial Pin 1 (CDET) to COM1 Pin 4 (DTR)
USB(DUT)Serial Pin 9 (RI) to COM1 Pin 7 (DTR)
2. COM2 direct testing:
USB(DUT)Serial Pin 3 (TXD) to COM2 Pin 2 (RXD)
USB(DUT)Serial Pin 2 (RXD) to COM2 Pin 3 (TXD)
USB(DUT)Serial Pin 7 (RTS) to COM2 Pin 8 (CTS)
USB(DUT)Serial Pin 8 (CTS) to COM2 Pin 7 (RTS)
USB(DUT)Serial Pin 6 (DSR) to COM2 Pin 4 (DTR)
USB(DUT)Serial Pin 5 (GND) to COM2 Pin 5 (GND)
USB(DUT)Serial Pin 4 (DTR) to COM2 Pin 6 (DSR)
USB(DUT)Serial Pin 1 (CDET) to COM2 Pin 4 (DTR)
USB(DUT)Serial Pin 9 (RI) to COM2 Pin 4 (DTR)
Operation System setting:
To use this utility, the PC running the test must have one or two COM port.
If the PC has two COM ports then one of two testing methods can be used.
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User Guide For FT232B/R Factory Test Utility Application Note AN_126
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If the PC has one COM port then only the “COM2 Direct test” can be used. This requires that the user sets
the COM port number to COM2. To do this, open the PC Device Manager and click the Port (COM & LPT),
then choose the COM port of motherboard. This is illustrated below.
Figure 2-1 Re-assign COM port number 1
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Select the Port Settings then click “Advanced”
Figure 2-2 Re-assign COM port number 2
Change the COM Port Number to COM2, and then click OK to finish the setting.
Figure 2-3 Re-assign COM port number to COM2
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3
Utility Basics
When the test utility is run then the following screen appears:
Figure 3-1 Default GUI
The following sections explain how to use the selections on the GUI shown above.
3.1 Operation
The utility has three sections:
Device:
This section displays existing setting of the EEPROM.
Testing Method:
There are two testing methods: the Y-cable test and the COM2 Direct Test.
Test Method
Description
Y-cable test
Using DB9 Y cable that is defined in section2 and
the PC onboard Com1,Com2 for testing
COM2 Direct Test
Using DB9 Direct test cable that is defined in
section2 and PC onboard Com2 for testing.
Table 3.1 Test Method Selection switch
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EEPROM data:
The following table describes the functions of these buttons:
Disable EEPROM Test
EEPROM Data
Description of operation
not selected
Select “Default”
Update Default data to EEPROM
not selected
Select “Read from file”
Update EEPROM from EEPROM.ini
selected
No function
No update EEPROM
Table 3.2 EEPROM Data Selection switch
The EEPROM data section has a switch, the default setting of EEPROM data is open. If “Disable EEPROM
test” is selected, then the EEPROM data section will be hidden. In this state then the RS232 function only
is tested.
Figure 3-2 The GUI of Test Only
If “Default” is selected then the EEPROM data will use the FTDI default setting.
If “Read from file” is selected then the EEPROM data will use the setting from the “EEPROM.ini” file.
When the utility is run, an EEPROM.ini file will be created automatically.
When all settings have been selected then, press the “Test” button. If the test passes and the device has
been programmed then the following is displayed.
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Figure 3-3 The GUI shows Pass message after testing
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User Guide For FT232B/R Factory Test Utility Application Note AN_126
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4
Edit EEPROM.ini Parameters
When user executes the test utility, it will automatically generate an EEPROM.ini file in the same folder.
The EEPROM.ini file stores some EEPROM programming parameters and saves recent utility settings
automatically. When user runs the utility, it will load the recent settings stored in EEPROM.ini file. The
default contents of EEPROM.ini are list below.
[GENERNAL]
FT_VENDOR_ID=0x0403
FT_PRODUCT_ID=0x6001
FT_MANUFATURER_STRING=FTDI
FT_MANUFATURER_ID=FT
FT_PRODUCT_STRING=USB Serial Converter
FT_MAX_POWER=44
SELF_POWERED=0
REMOTE_WAKEUP=1
[FT232B]
SERNO_ENABLE=0
[FT232R]
SERNO_ENABLE=1
[SETTING]
EPPROM_EN=1
TEST_METHOD=0
READ_FROM=0
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User Guide For FT232B/R Factory Test Utility Application Note AN_126
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Figure 4-1 Read EEPROM configuration from EEPROM.ini file
If a user selects the “Read from File” setting and then presses the “test” button, the utility will also load
the EEPROM parameters from the EEPROM.ini and program into the device. Please check the detailed
EEPROM.ini parameters explanation in the following paragraphs.
4.1 VID/PID ID
In the EEPROM.ini file, the parameters of “FT_VENDOR_ID” and “FT_PRODUCT_ID” can be used to set
Vendor ID and Product ID of USB configurations. If the FTDI default values are used, the VID and PID are
fixed to 0x0403/0x6001. If custom USB Vendor ID and Product ID are used then it is necessary to
change value of the “FT_VENDOR_ID” and “FT_PRODUCT_ID” in EEPROM.ini file to match these custom
VID and PIDs. Please refer to the following example to modify the EEPROM.ini file.
FT_VENDOR_ID=0x1234 // Set VID to 1234 of HEX
FT_PRODUCT_ID=0xABCD // Set PID to ABCD of HEX
Note that if non-standard VID and/or PID values are used the driver INF and INI files must be
modified to accommodate the new VID and PID combination. Please refer to the application
note AN-107.
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User Guide For FT232B/R Factory Test Utility Application Note AN_126
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4.2 Description
In the EEPROM.ini file, “FT_MANUFATURER_STRING”,” FT_PRODUCT_STRING” and
“FT_MANUFATURER_ID” can be modified to change the description of device. The serial number is
automatically chosen as a random value.
Note that the Maximum length of descriptors is 48 words. The descriptors include the
manufacturer/produce Description and serial number that total 48 words.
4.3 Power selection
The “FT_MAX_POWER” and “SELF_POWERED” can be used to set USB description power selection.
The value of SELF_POWERED is 0, the device description is set in BUS powered mode.
The value of SELF_POWERED is 1, the device description is set in Self powered mode.
When a device is set in BUS powered mode, the value of “FT_MAX_POWER” will be used. Please refer
the following example on how to modify the EEPROM.ini file.
FT_MAX_POWER=100 // Set the description of USB Max power to 100mA
SELF_POWERED=0 // Set USB description of power mode to Bus Power
All USB Devices:
The maximum current that can be supplied over the USB bus without violating the USB specification
is 500mA. Do not enter a value of more than 500mA in the Max Bus Power field.
High power bus powered products. These products consume between 101mA and 500mA from the
USB bus and can be plugged into any USB host. However, such products can only be plugged into
self powered USB hubs (hubs that have their own power supply) as bus powered USB hubs can only
supply 100mA per hub port.
Bus Powered USB Devices
These fall into two categories:
Low power bus powered products. These products consume 100mA or less from the USB bus and
can be plugged into any USB host or hub port.
High power bus powered products. These products consume between 101mA and 500mA from the
USB bus and can be plugged into any USB host. However, such products can only be plugged into
self powered USB hubs (hubs that have their own power supply) as bus powered USB hubs can only
supply 100mA per hub port.
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Self Powered USB Devices
These devices fall into two categories:
True self powered products. These products have their own power supply and do not require any
current from the USB bus. Enter a value of zero in the Max Bus Power field.
Hybrid self powered products. These products have their own power supply, but also draw some of
their operating current from the USB bus. Enter the current draw from the USB bus in the Max Bus
Power field.
4.4 USB Remote Wakeup
The FT232R and FT232B are capable of resuming a PC from the USB suspend (sleep) state via the RI#
pin. To use the remote wake-up capability, enable this option by value of “REMOTE_WAKEUP”.
REMOTE_WAKEUP = 0 means disable.
REMOTE_WAKEUP =1 means enable.
4.5 Serial number
Because the utility supports two devices (FT232B and FT232R), the EEPROM.ini file has two serial number
selections.
Users can set [FT232R] and [FT232B] with different items.
SERNO_ENABLE =0 means disable serial number
SERNO_ENABLE =1 means enable randomly generated serial number.
Please refer the following example to modify the EEPROM.ini file.
[FT232B]
SERNO_ENABLE=0 // If the device is FT232B, disable the USB serial number description.
[FT232R]
SERNO_ENABLE=1 // If the device is FT232R, generate the USB serial number description
automatically.
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User Guide For FT232B/R Factory Test Utility Application Note AN_126
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4.6 Other settings
The utility saves any setting changes automatically. When a user runs the utility, it will load the settings
stored in the EEPROM.ini file. Additional settings of the EEPROM.ini are listed below.
EPPROM_EN:
0: enable EEPROM Data section
1: disable EEPROM Data section
TEST_METHOD:
0: use the Y Cable test
1: use the COM2 Direct test
READ_FROM:
0: set in Default
1: set in read from file
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Document Reference No.: FT_000176
User Guide For FT232B/R Factory Test Utility Application Note AN_126
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5
Definition of Error Messages
The following section shows some error messages which may be displayed if issues occur. It also
indicates possible reasons for the failure to help with factory debugging.
If the PC used to test the device does not recognise the motherboard COM ports, then the following
message is displayed. To avoid this issue, please use a PC that has a COM ports. If user uses “COM2
Direct test”, the PC must have COM2 port. If user selects”Y cable test”, the PC must have COM1 and
COM2 ports.
Figure 5-1 Failure message 1
If the COM port test cannot detect the DTR signal, then the following message is displayed. Please
check your DTR connection of the board or cable.
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Figure 5-2 Failure massage 2
If the COM port test cannot detect the CD signal, then the following message is displayed. Please
check your CD connection of the board or cable.
Figure 5-3 Failure message 3
If the device cannot be seen by the PC, then the following error message is displayed. Please check
the device is connected to the PC and that the PC has recognised the device.
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Figure 5-4 Failure message 4
If the test fails with the following message then the utility cannot program the EEPROM. Please
check your EEPROM or device soldering.
Figure 5-5 Failure message 5
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6
Contact Information
Head Office – Glasgow, UK
Future Technology Devices International Limited
Unit 1,2 Seaward Place, Centurion Business Park
Glasgow G41 1HH
United Kingdom
Tel: +44 (0) 141 429 2777
Fax: +44 (0) 141 429 2758
E-mail (Sales) sales1@ftdichip.com
E-mail (Support) support1@ftdichip.com
E-mail (General Enquiries) admin1@ftdichip.com
Web Site URL http://www.ftdichip.com
Web Shop URL http://www.ftdichip.com
Branch Office – Taipei, Taiwan
Future Technology Devices International Limited (Taiwan)
2F, No. 516, Sec. 1, NeiHu Road
Taipei 114
Taiwan , R.O.C.
Tel: +886 (0) 2 8791 3570
Fax: +886 (0) 2 8791 3576
E-mail (Sales)
tw.sales1@ftdichip.com
tw.support1@ftdichip.com
E-mail (Support)
E-mail (General Enquiries) tw.admin1@ftdichip.com
Web Site URL http://www.ftdichip.com
Branch Office – Hillsboro, Oregon, USA
Future Technology Devices International Limited (USA)
7235 NW Evergreen Parkway, Suite 600
Hillsboro, OR 97123-5803
USA
Tel: +1 (503) 547 0988
Fax: +1 (503) 547 0987
E-Mail (Sales)
us.sales@ftdichip.com
E-Mail (Support) us.admin@ftdichip.com
Web Site URL
http://www.ftdichip.com
Branch Office – Shanghai, China
Future Technology Devices International Limited (China)
Room 408, 317 Xianxia Road,
Shanghai, 200051
China
Tel: +86 21 62351596
Fax: +86 21 62351595
E-mail (Sales)
cn.sales@ftdichip.com
E-mail (Support) cn.support@ftdichip.com
E-mail (General Enquiries) cn.admin@ftdichip.com
Web Site URL http://www.ftdichip.com
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User Guide For FT232B/R Factory Test Utility Application Note AN_126
Version 1.0
Clearance No.: FTDI# 111
Distributor and Sales Representatives
Please visit the Sales Network page of the FTDI Web site for the contact details of our distributor(s) and
sales representative(s) in your country.
Vinculum is part of Future Technology Devices International Ltd. Neither the whole nor any part of the information contained in, or the
product described in this manual, may be adapted or reproduced in any material or electronic form without the prior written consent of
the copyright holder. This product and its documentation are supplied on an as-is basis and no warranty as to their suitability for any
particular purpose is either made or implied. Future Technology Devices International Ltd will not accept any claim for damages
howsoever arising as a result of use or failure of this product. Your statutory rights are not affected. This product or any variant of it is
not intended for use in any medical appliance, device or system in which the failure of the product might reasonably be expected to
result in personal injury. This document provides preliminary information that may be subject to change without notice. No freedom to
use patents or other intellectual property rights is implied by the publication of this document. Future Technology Devices International
Ltd, Unit 1, 2 Seaward Place, Centurion Business Park, Glasgow G41 1HH United Kingdom. Scotland Registered Number: SC136640
Copyright © 2009 Future Technology Devices International Limited 18
Document Reference No.: FT_000176
User Guide For FT232B/R Factory Test Utility Application Note AN_126
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Appendix A - Revision History
Revision History
Version 1.0
First Release
20/10/2009
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