USB-COM232-PLUS2 Datasheet

Future Technology Devices International Ltd
USB-COM232-PLUS2
Datasheet
Document Reference No.: FT_000147
Version 1.1
Issue Date: 2010-04-12
Future Technology Devices International Ltd (FTDI)
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 (Support): [email protected] Web: http://www.ftdichip.com
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 preliminar y
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, Unit1, 2 Seaward Place, Centurion Business Park,
Glasgow, G41 1HH, United Kingdom. Scotland Registered Number: SC136640
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1
Introduction
1.1 Functional Description
The USB-COM232-PLUS modules are a family of Hi-Speed communication devices. This model, USBCOM232-PLUS2, provides a simple method of adapting two legacy RS232 serial devices to a modern USB
port. This is accomplished by incorporating the industry standard FTDI FT2232H USB2.0 Hi-Speed serial
bridge chip.
The integrated electronics of the USB-COM232-PLUS2 utilise the FTDI FT2232H plus two RS232 level
shifters and TXD/RXD LEDs to provide a visual indication of data traffic through the module.
Figure 1.1 USB-COM232-PLUS2
The module uses a standard USB-miniB device connector for connection to an upstream host or hub port.
RS232-level signals, including modem handshake signals, are available on an industry-standard DE-9P
connector. The maximum RS232-level data rate is 1Mbps.
The USB-COM232-PLUS2 module requires USB device drivers, available free from www.ftdichip.com,
which are used to make the USB-COM232-PLUS2 appear as two Virtual COM Port (VCP). This allows
existing serial communications software, such as HyperTerminal, to exchange data through the USBCOM232-PLUS2 to a legacy RS232 peripheral device.
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1.2 LED Description
The USB-COM232-PLUS2 uses five LEDs to indicate a valid link as well as data traffic according to the
following table:
LED
Function
Description
Yellow
Enumerated
ON when USB-COM-PLUS2 is configured and ready
1
Red
TxD Activity
Flashes when data is transmitted from the USB-COM232-PLUS2 to
the attached RS232 device
2
Green
RxD Activity
Colour
quantity
Flashes when data is transmitted from the attached RS232 device to the
USB-COM232-PLUS2
2
Table 1.1 – LED Description
1.3 Block Diagram
USB miniB
Client
Connector
RS232
Level Shifter
DE-9P
Connector
RS232
Level Shifter
DE-9P
Connector
FTDI FT2232H
USB Serial Bridge
Figure 1.2 USB-COM232-PLUS2 Block Diagram
1.3.1 Block description
USB miniB Client Connector
This connector provides the interface for connection to a USB Host or Hub port. The maximum cable
length is 5 meters, according to the USB 2.0 specification.
FTDI FT2232H
The FTDI FT2232H provides the USB-to-Serial conversion. Operating system device drivers are required
in order to operate with the FT2232H to provide dual Virtual COM Port serial functionality.
RS232 Level Shifter
The RS232 level shifter converts the signals provided by the FT2232H into the voltage levels required by
RS232 devices.
DE-9P Connector (Male)
The DE-9P connector is configured in an industry standard (TIA/EIA-574) pin-out to provide connection to
RS232 peripherals through standard cables. See section 3.1.2
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1.4 Features
Adds two RS-232 serial ports by connecting to USB
Easy plug & play installation and RS-232 device connection
Provide USB2.0 Hi-Speed(480Mbps) interface and works with USB 1.1 & 2.0 Host and Hub ports
Industry Standard FTDI chip set & device drivers for maximum compatibility
Microsoft Windows® WHQL-certified, Mac OS X, Linux and Windows CE device drivers
Installs as two standard Windows COM ports
COM port number can be changed to any available COM port number, including COM1 to COM4,
to support HyperTerminal, or any other serial communications software application running in
Windows
Supports Windows Server 2008, 2003, Vista, XP 2000, Linux, Mac OS X
FIFO: 4K byte transmit buffer, 4K byte receive buffer
RS-232 data signals: TxD, RxD, RTS, CTS, DTR, DSR, DCD, RI, GND
Powered by USB port. No external power adapter required.
Serial port speed up to 1Mbps
Serial Communication Parameters
o
Parity: None, Even, Odd
o
Data bits: 7, 8
o
Flow control: RTS/CTS , DTR/DSR, X-ON/X-OFF, None
Two DE-9P male connectors
LEDs indicate USB Enumeration, RxD, TxD for monitoring port status & easy diagnostics
Operating temperature of -40°C to +85°C
1.5 Performance Figures
Parameter
Performance
USB Interface
480Mbps USB 2.0 Hi-Speed
Standard Windows baud rates (300bps to 921.6Kbps)
RS232 Interface
Custom baud rates (300bps to 1Mbps) through baud rate aliasing. See
FTDI Application Note: AN232B-05 Configuring FT232R, FT2232 and
FT232BM Baud Rates
Table 1.2 - Performance Figures
Part Number
Description
USB-COM232-PLUS2
USB-COM-PLUS2 Hi-Speed USB to 2-Port RS232 module
Table 1.3 - Ordering Information
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Introduction ................................................................................... 1
1.1
Functional Description .................................................................................. 1
1.2
LED Description ............................................................................................. 2
1.3
Block Diagram ............................................................................................... 2
1.3.1
2
1.4
Features ........................................................................................................ 3
1.5
Performance Figures ..................................................................................... 3
Installation ..................................................................................... 6
2.1
Example Applications and Configurations ..................................................... 6
2.1.1
2.2
3
5
7
Device Driver Installation ............................................................................. 7
Microsoft Windows ..................................................................................... 7
2.2.2
Mac OS X, Linux, Windows CE ................................................................... 11
Connections .................................................................................. 12
External Connectors .................................................................................... 12
3.1.1
USB ....................................................................................................... 12
3.1.2
RS232 .................................................................................................... 12
Electrical details ........................................................................... 13
4.1
USB ............................................................................................................. 13
4.2
RS232 ......................................................................................................... 13
Mechanical Details ........................................................................ 14
5.1
6
Module Mechanical Dimensions ................................................................... 14
Physical Environment Details ....................................................... 15
6.1
Storage ....................................................................................................... 15
6.2
Operating .................................................................................................... 15
Environmental Approvals & Declarations ...................................... 16
7.1
EMI Compatibility ........................................................................................ 16
7.2
Safety.......................................................................................................... 16
7.3
Environmental ............................................................................................. 16
7.4
Reliability .................................................................................................... 16
7.4.1
7.5
8
9
Wiring ...................................................................................................... 6
2.2.1
3.1
4
Block description ....................................................................................... 2
MTTF ..................................................................................................... 16
Import / Export Information ....................................................................... 17
Troubleshooting ........................................................................... 18
8.1
Hardware .................................................................................................... 18
8.2
Device Driver .............................................................................................. 18
8.3
Technical Support ....................................................................................... 19
Contact Information ..................................................................... 20
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10 Appendix A - List of Figures and tables......................................... 22
Appendix B - Revision History ............................................................ 23
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2
Installation
2.1 Example Applications and Configurations
2.1.1 Wiring
Insert the A-plug of a USB cable into an available USB Host or Hub port. Insert the miniB-plug into the
miniB-receptacle on the USB-COM232-PLUS2.
RS232 cables have followed a standard 9-pin configuration on a D-sub connector since the mid 1980s.
The USB-COM232-PLUS2 follows this standard as a Data Terminal Equipment (DTE) device. If the RS232
equipment being connected is a Data Communication Equipment (DCE) device, it’s typical that a straightthrough cable can be used.
DTE Pin Number
Signal Name
DCE Pin Number
1
DCD = Data Carrier Detect
1
2
RXD = Receive Data
2
3
TXD = Transmit Data
3
4
DTR = Data Terminal Ready
4
5
GND = RS232 signal ground
5
6
DSR = Data Set Ready
6
7
RTS = Request To Send
7
8
CTS = Clear To Send
8
9
RI – Ring Indicator
9
Table 2.1 – RS232 DTE to DCE connection with straight-through cable
If the USB-COM232-PLUS2 is connected to another DTE device, a serial “null-modem” cable is required. A
null-modem cable handles connecting output signals to the corresponding input signals on the other end.
Table 2.2 shows a typical null-modem cable. Note that RI and DCD are not always used.
DTE Pin Number
Signal Name
DTE Pin Number
2
RXD = Receive Data
3
3
TXD = Transmit Data
2
4
DTR = Data Terminal Ready
6
5
GND = RS232 signal ground
5
6
DSR = Data Set Ready
4
7
RTS = Request To Send
8
8
CTS = Clear To Send
7
Table 2.2 – RS232 DTE to DTE connection with null-modem cable
Some serial devices may require certain handshake signals be connected. Refer to your device manual
for cabling details.
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2.2 Device Driver Installation
The USB-COM232-PLUS2 module drivers are available for download from:
www.ftdichip.com
2.2.1 Microsoft Windows
With the device drivers being Windows Hardware Quality Labs (WHQL) certified, they are also available
through download directly from the Microsoft® Windows® Update service. This is the best choice when
connecting the USB-COM232-PLUS2 to a computer running Windows Vista. Additional installation options
are noted below:
Installation Executable shown on Windows XP
1) Login to your system as administrator, or a user with administrator rights.
2) Prior to connecting the USB-COM232-PLUS2 to the USB Host or Hub port, download the latest
device driver version from the FTDIChip web site.
3) Run this executable to install the device drivers.
4) Connect the USB-COM232-PLUS2 to your computer. A notification will appear near the task bar
indicating that new hardware has been installed and is ready for use. It is normal if this notice
appears twice.
Figure 2.1 - Hardware Ready
Windows Update shown on Windows XP
You must have an active Internet connection and the Windows Update Service enabled.
1) Connect the USB-COM232-PLUS2 to your USB Host or Hub.
2) The “Found New Hardware” Wizard will appear. The first dialog should ask whether it is
acceptable to use the Windows Update Service to find the device driver.
Figure 2.2 – Found New Hardware Wizard
3) Select one of the “Yes” choices and click “Next”.
4) The following screen appears:
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Figure 2.3 – Automatic Install
5) Wait while the driver is found, downloaded, and installed. This step may take a couple minutes
depending on the Internet speed.
6) After the files are found and installed, click “Finish” to complete the installation.
Figure 2.4 - Complete Hardware Installation
7) Steps 2 through 6 will repeat. The first time installs the basic USB Serial Converter in the USB
device tree. The second time installs the Virtual COM Port layer in the Ports tree and assigns the
COM port number. You must install the Virtual COM Port layer twice, because the USB-COM232PLUS2 has two Virtual COM Port.
8) When both portions of the device driver have been installed successfully, the following message
will appear, indicating that the device is ready.
Figure 2.5 - Hardware Ready
COM Port Assignment
Next, to determine which COM port has been assigned, open the Windows Device Manager from the
System Control Panel.
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Figure 2.6 - 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 USB-COM232-PLUS2 is assigned to
COM3 and COM4. Port A is always assigned the lower COM port number (COM3 in this example) and Port
B the higher COM port number (COM4 in this example).
Figure 2.7 - COM Port Assignment
Use these COM port numbers with your application software in order to access the USB-COM232-PLUS2.
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.
Figure 2.8 – Access COM Port Properties
Next, click on the “Port Settings” tab.
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Figure 2.9 - Settings Tab
Then click on the “Advanced…” button.
Figure 2.10 - Advanced Options
This will display the various advanced settings. Note the COM port assignment in the upper left. Clicking
on the drop-down list will display the available port numbers. Select one that is not in use and click OK
on each dialog box to activate the selection. Windows will remember this COM port number.
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2.2.2 Mac OS X, Linux, Windows CE
Device drivers and FTDI installation guides for Mac OS X, Linux and Windows CE are available for
download on the FTDIChip web sites. Follow the respective FTDI installation guides for the chosen
operating system.
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3
Connections
3.1 External Connectors
3.1.1 USB
The USB-COM232-PLUS2 is a USB 2.0 Hi-Speed Device. A standard USB Series “miniB” receptacle is
mounted on the USB-COM232-PLUS2 to facilitate connection to an upstream USB Host or Hub.
Pin Number
Pin Type
Description
1
Power
2
Bidirectional
D– = USB data signal, negative polarity
3
Bidirectional
D+ = USB data signal, positive polarity
4
ID
5
Ground
Shield
Case Ground
VBUS – USB Power provided from upstream USB Host or Hub
ID = Host /slave select pin ,No used
GND = USB signal ground
Drain = typically connected to the host PC case
Table 3.1 – USB "miniB" Receptacle Pin-Out
3.1.2 RS232
The RS232 port is configured as Data Terminal Equipment (DTE), with a 9-contact D-Sub Pin connector.
Pin assignments are according to TIA/EIA-574 which formally defines the assignments for a COM port
found on many personal computers.
Pin Number
Pin Type
Description
1
Input
DCD = Data Carrier Detect
2
Input
RXD = Receive Data
3
Output
TXD = Transmit Data
4
Output
DTR = Data Terminal Ready
5
Ground
GND = RS232 signal ground
6
Input
DSR = Data Set Ready
7
Output
RTS = Request To Send
8
Input
CTS = Clear To Send
9
Input
RI = Ring Indicator
Shield
Case Ground
Drain = typically connected to the host PC case
Table 3.2 – DE-9P RS232 Pin-Out
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4
Electrical details
4.1 USB
Parameter
Description
Minimum
Typical
Maximum
Units
Conditions
*Present when USB
USB_VCC
Input Power Voltage*
4.25
5.0*
5.25
V
cable is attached and
USB Host or Hub
powered.
Icc
USB current
30
50
mA
Typical
Maximum
Units
Table 4.1 - USB Electrical Details
4.2 RS232
Parameter
Vtrans
Vrec
Description
Transmitter output
voltage swing
Receiver input voltage
range
ESD HBM
Minimum
±5
±2.4
±25
±15
Conditions
V
RL = 3KΩ
V
Input resistance = 3KΩ
to 7KΩ
KV
RS-232 Inputs and
Outputs
Table 4.2 - RS232 Electrical Details
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5
Mechanical Details
5.1 Module Mechanical Dimensions
Figure 5.1 - USB-COM232-PLUS2 PCB Dimensions
Dimensions are in mm. The height of the module is dominated by the 2 D-type connectors and stands
12.8mm +/- 1mm. The D-type pins protrude below the PCB by 2.54mm +/-1mm
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Physical Environment Details
6.1 Storage
Parameter
T
Description
Minimum
Storage Temperature
Range
Typical
TBD
Maximum
TBD
Units
Conditions
o
C
Table 6.1 - Storage Temperature
6.2 Operating
Parameter
T
Description
Minimum
Operating Temperature
Range
–40
Typical
Maximum
+85
Units
o
C
Conditions
5% to 95% RH,
non condensing
Table 6.2 - Operating Temperature
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Environmental Approvals & Declarations
7.1 EMI Compatibility
FCC and CE
The USB-COM232-PLUS2 has been tested to be compliant with both FCC Part 15 Subpart B and European
EMC Directive.
NOTE: This is a Class B product. In a domestic environment, this product may cause radio interference,
in which case the user may be required to take adequate measures.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
Consult the dealer or an experienced radio/TV technician for help.
7.2 Safety
The USB-COM232-PLUS2 is defined as Limited Power Supply (LPS) device, with operating voltages under
60VDC.
7.3 Environmental
The USB-COM232-PLUS2 is a lead-free device that complies with the following environmental directives:
RoHS, WEEE, REACH, PFOS and DecaBDE.
7.4 Reliability
The USB-COM232-PLUS2 is designed as a robust USB-Serial module for use in many environments.
There are no user-serviceable parts. Any failure will require a replacement of the unit.
7.4.1 MTTF
The Mean Time To Failure is calculated at TBD hours.
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7.5 Import / Export Information
Import / Export Information
Country of Origin
China
Harmonized Code
8542.90.0000
Product Description
USB to RS232 Development Module, Two COM Port
USA ECCN
EAR99 – No License Required
Table 7.1 - Import / Export Information
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8
Troubleshooting
8.1 Hardware
Cables are the most common sources of trouble with external devices.
Check the following:
-
USB cable is properly inserted at both ends
-
Computer power is ON
-
Computer is not in Sleep or Standby
-
If a USB Hub is used, be sure it is set for “Self-Powered” operation
-
If a USB Hub is used, be sure all cables are properly inserted
-
If all the above are OK, the Yellow LED should be lit, indicating the device has been recognized by the
USB subsystem.
RS232 cables – check the following:
-
Output signals (TXD, RTS, DTR) are connected to the respective inputs (RXD, CTS, DSR) in each
direction.
-
Check for specific handshake requirements of your RS232 peripheral.
-
If handshake signals are note used, ensure the application is set to “No Hardware Handshake”, or
equivalent.
-
Test the port with a loop-back connector. Connect TXD to RXD, RTS to CTS and DTR to DSR. Use a
simple terminal program to check that data is transmitted and received.
8.2 Device Driver
Ensure the latest device driver is in use. See www.ftdichip.com
If other devices with FTDI chips are installed in the system, check with all manufacturers of these devices
for the latest device drivers.
See the FTDI installation guides for additional details: http://ftdichip.com/Documents/InstallGuides.htm
Common Windows Device Driver Troubles:
DEVICE TIMES OUT: The default settings of the device driver assume typical data transfers of
hundreds to thousands or more bytes at a given time. Some applications, such as a GPS device,
only send data in short packets, often only a few bytes. If this is the case, it may be necessary
to adjust the driver buffer size and/or latency timer to smaller values. These values can be
adjusted through the Advanced driver options as noted in Figure 2.13. The buffer size can be
reduced to 64 bytes. The latency timer can be set as low as 2ms. A setting of 1ms will cause
unnecessary USB traffic and could adversely affect data transmission.
ERRATIC MOUSE POINTER: The device driver defaults to query an attached device to find out
whether it is a mouse or modem, consistent with native COM port operation. Some RS232
peripherals constantly send short packets of data, causing the host system to “think” a mouse or
modem has been attached. These short packets will interfere with normal mouse operation
causing the pointer to jump around the screen. If this happens, disconnect the RS232 device and
uncheck the Serial Enumerator option, also found on the Advanced driver options screen in Figure
2.13.
COM PORT IN USE: Windows keeps track of all COM port assignments. If multiple FTDIChip
products have been connected to a single system, the COM port number will increase, even if the
other devices are not attached. If the higher COM port assignments are not acceptable for the
application, known unused COM port numbers should be uninstalled according to the FTDI
installation guide: http://ftdichip.com/Documents/InstallGuides.htm.
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8.3 Technical Support
Technical support may be obtained from your nearest FTDIChip office:
United Kingdom:
[email protected]
United States:
[email protected]
China:
[email protected]
Taiwan
[email protected]
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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) [email protected]
E-mail (Support) [email protected]
E-mail (General Enquiries) [email protected]
Web Site URL http://www.ftdichip.com
Web Shop URL http://www.ftdichip.com
Branch Office – Shanghai, China
Future Technology Devices International Limited (China)
Room 408, 317 Xianxia Road,
ChangNing District,
ShangHai, China
Tel: +86 (21) 62351596
Fax: +86(21) 62351595
E-Mail (Sales): [email protected]
E-Mail (Support): [email protected]
E-Mail (General Enquiries): [email protected]
Web Site 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)
[email protected]
E-mail (Support) [email protected]
E-mail (General Enquiries) [email protected]p.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)
[email protected]
E-Mail (Support) [email protected]
E-mail (General Enquiries) [email protected]
Web Site URL
http://www.ftdichip.com
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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.
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10 Appendix A - List of Figures and tables
List of Figures:
Figure 1.1 USB-COM232-PLUS2 ..................................................................................................................... 1
Figure 1.2 USB-COM232-PLUS2 Block Diagram .......................................................................................... 2
Figure 2.1 - Hardware Ready .......................................................................................................................... 7
Figure 2.2 – Found New Hardware Wizard .................................................................................................... 7
Figure 2.3 – Automatic Install ......................................................................................................................... 8
Figure 2.4 - Complete Hardware Installation ................................................................................................ 8
Figure 2.5 - Hardware Ready .......................................................................................................................... 8
Figure 2.6 - Device Manager ........................................................................................................................... 9
Figure 2.7 - COM Port Assignment ................................................................................................................ 9
Figure 2.8 – Access COM Port Properties..................................................................................................... 9
Figure 2.9 - Settings Tab ............................................................................................................................... 10
Figure 2.10 - Advanced Options ................................................................................................................... 10
Figure 5.1 - USB-COM232-PLUS2 PCB Dimensions .................................................................................. 14
List of tables:
Table 1.1 – LED Description ........................................................................................................................... 2
Table 1.2 - Performance Figures .................................................................................................................... 3
Table 1.3 - Ordering Information .................................................................................................................... 3
Table 2.1 – RS232 DTE to DCE connection with straight-through cable ................................................... 6
Table 2.2 – RS232 DTE to DTE connection with null-modem cable ........................................................... 6
Table 3.1 – USB "miniB" Receptacle Pin-Out ............................................................................................. 12
Table 3.2 – DE-9P RS232 Pin-Out ................................................................................................................. 12
Table 4.1 - USB Electrical Details ................................................................................................................. 13
Table 4.2 - RS232 Electrical Details ............................................................................................................. 13
Table 6.1 - Storage Temperature .................................................................................................................. 15
Table 6.2 - Operating Temperature .............................................................................................................. 15
Table 7.1 - Import / Export Information ........................................................................................................ 17
Copyright © 2010 Future Technology Devices International Limited
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Document Reference No.: FT_000147
USB-COM232-PLUS2 Datasheet
Version 1.1
Clearance No.: FTDI# 96
Appendix B - Revision History
Version Draft
First Draft
June 2009
Version 1.0
First Release
July 7th 2009
Version 1.1
Edited Section 1.3.1, Removed the statement
“A standard “A to B” cable is provided”
12th April 2010
Copyright © 2010 Future Technology Devices International Limited
23