Use of FTDI devices in life support and/or safety applications is entirely at the user’s risk, and the user agrees
to defend, indemnify and hold harmless FTDI from any and all damages, claims, suits or expense resulting
from such use.
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
Future Technology
Devices
International
Datasheet
UMFT234XD Breakout
Modules
UMFT234XD is a USB to UART breakout module
1 Introduction
The UMFT234XD breakout module utilizes FTDI’s FT234XD IC to convert USB to UART.
1.1 Features
The UMFT234XD is a breakout board that converts USB2.0 Full-Speed to UART. These modules do not have a
USB connector, instead, the modules plug directly into the USB host connector and the pads of the PCB
makes electrical contact with the electrical contacts of the USB connector.
The UART interface operates at +3.3V voltage levels, however all I/Os are 5V tolerant.
1.2 Ordering Information
Module
Interface
Features
UMFT234XD-01
UART
USB to UART with four control bus lines, 3.3V power out limited to 50mA
and 5V with as safety fuse. UART signals available via 8 pin female
connector.
UMFT234XD-NC
UART
USB to UART with four control bus lines, 3.3V power out limited to 50mA
and 5V with as safety fuse. UART signals available via 8 pads on the PCB.
UMFT234XD-WE
UART
USB to UART with four control bus lines, 3.3V power out limited to 50mA
and 5V with as safety fuse. UART signals available via 8, 6” flying leads
connected to the PCB pads.
2 Driver Support
Royalty-Free VIRTUAL COM PORT (VCP):
Windows 8 32,64-bit
Windows 7 32,64-bit
Windows Vista
Windows XP 32,64-bit
Windows XP Embedded
Windows CE.NET 4.2 , 5.0 and 6.0
MAC OS OS-X
Linux 3.0 and greater
Android
The drivers listed above are all available to download for free from www.ftdichip.com. Various 3rd Party
Drivers are also available for various other operating systems - visit www.ftdichip.com for details.
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Copyright © 2015 Future Technology Devices International Limited
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
Table of Contents
1 Introduction ................................................................................... 1
1.1 Features ........................................................................................................ 1
1.2 Ordering Information .................................................................................... 1
2 Driver Support ................................................................................ 1
3 UMFT234XD Signals and Configurations ......................................... 3
3.1 UMFT234XD CN1 Signal Descriptions ............................................................ 3
3.2 UMFT234XD CN2 Signal Descriptions ............................................................ 3
3.3 CBUS Signal Options ..................................................................................... 4
3.4 Configuring the MTP ROM .............................................................................. 5
4 Module Dimensions ........................................................................ 5
5 Module Wire Connections ............................................................... 6
5.1 UMFT234XD-WE Wire Connections ................................................................ 6
5.2 UMFT234XD-WE ............................................................................................ 6
6 Module Circuit Schematic ............................................................... 7
6.1 UMFT234XD Schematic ................................................................................. 7
7 Environmental Compliances ........................................................... 7
8 Internal MTP ROM Configuration .................................................... 8
9 Contact Information ....................................................................... 9
Appendix A - List of Figures and Tables ................................................................... 9
Appendix B: Revision History ................................................................................ 10
3
Copyright © 2015 Future Technology Devices International Limited
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
3 UMFT234XD Signals and Configurations
CN1 connects directly to a USB host or HUB port, or can be connected to a USB extension cable. This
connects to USB signals, 5V USB Bus power and GND. When connecting the module to a USB host or HUB
the signal pads should be facing upwards when connecting to a horizontal connector and be facing right
for vertical connectors. If the module is plugged in upside down no connectivity will be made between
PCB and HUB, no damage will occur from plugging the module in the wrong way.
3.1 UMFT234XD CN1 Signal Descriptions
Pin No.
Name
Type
Description
1
VBUS
PWR
5V Power input USB port. For a low power USB bus powered design, up to 100mA can
be sourced from the 5V supply on the USB bus. A maximum of 500mA can be sourced
from the USB bus in a high power USB bus powered design.
2
D-
Signal
Negative USB data signal
3
D+
Signal
Positive USB data signal
4
GND
PWR
Module Ground
Table 3.1 USB Connector Pin Out Description
3.2 UMFT234XD CN2 Signal Descriptions
Pin No.
Name
Type
Description
1
TXD
Output
UART transmit data
2
VBUS
PWR
Output
5V Power output USB port.
3
GND
PWR
Module Ground Supply
4
RESET#
Input
Can be used by an external device to reset the FT234XD.
5
RXD
Input
UART receive data
6
3V3
Output
3.3V output from FT234XD integrated LDO regulator. This pin is decoupled to ground
on the module PCB with a 10nF capacitor and offers 3V3 at up to 50mA for external
hardware.
7
RTS#
Output
UART Ready to Send handshake signal
8
GND
PWR
Module Ground Supply
9
CTS#
Input
UART Clear to Send handshake signal
10
CB0
I/O
Configurable CBUS0 I/O Pin. The function of this pin is configured in the device
internal
MTP ROM. See Table 3.3
Table 3.2 UART Module Pin Out Description
4
Copyright © 2015 Future Technology Devices International Limited
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
3.3 CBUS Signal Options
CBUS Signal
Option
Available On
CBUS Pin
Description
Tristate
CBUS0
IO Pad is tri-stated
DRIVE_1
CBUS0
Output a constant 1
DRIVE_0
CBUS0
Output a constant 0
TXDEN
CBUS0
Enable transmit data for RS485
PWREN#
CBUS0
Output is low after the device has been configured by USB, then high during
USB suspend mode. This output can be used to control power to external logic.
TXLED#
CBUS0
Transmit data LED drive open drain pulses low when transmitting data via
UART.
RXLED#
CBUS0
Receive data LED drive open drain pulses low when receiving data via UART.
TX&RXLED#
CBUS0
LED drive open drain pulses low when transmitting or receiving data via
UART.
SLEEP#
CBUS0
Goes low during USB suspend mode. Typically used to power down external
logic to RS232 level converter IC in USB to RS232 converter designs
CLK24MHz
CBUS0
24 MHz Clock output.**
CLK12MHz
CBUS0
12 MHz Clock output.**
CLK6MHz
CBUS0
6 MHz Clock output.**
GPIO
CBUS0
CBUS bit bang mode option. Allows up to 4 of the CBUS pins to be used as
general purpose I/O. A separate application note, AN232R-01, available from
FTDI website (www.ftdichip.com) describes in more detail how to use CBUS bit
bang mode.
BCD_Charger
CBUS0
Battery Charge Detect indicates when the device is connected to a dedicated
battery charger host. Active high output. NOTE: Requires a 10K pull-down to
remove power up toggling.
BCD_Charger#
CBUS0
Active low BCD Charger, driven by an open drain to ground with no internal
pull-up.
BitBang_WR#
CBUS0
Synchronous and asynchronous bit bang mode WR# strobe output.
BitBang_RD#
CBUS0
Synchronous and asynchronous bit bang mode RD# strobe output.
VBUS_Sense
CBUS0
Input to detect when VBUS is present.
Time_Stamp
CBUS0
Toggle signal which changes state each time a USB SOF is received
Keep_Awake#
CBUS0
Active Low input, prevents the chip from going into suspend.
Table 3.3 CBUS Configuration Control
* PWREN# must be used with a 10kΩ resistor pull up.
**When in USB suspend mode the outputs clocks are also suspended.
5
Copyright © 2015 Future Technology Devices International Limited
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
3.4 Configuring the MTP ROM
The FT234XD IC on the module contains an embedded MTP ROM, this can be used to specify the
functions of the CBUS0 pin, the current drive on each signal pin, current limit for the USB bus and the
descriptors of the device. These features can be programmed using FTDI’s programming utility FT_Prog.
For details on using FT_Prog, please see the FT_PROG User Guide.
When programming the MTP ROM please note:
i) The Max Bus Power setting of the MTP ROM should specify the maximum current to be drawn from
the USB host/hub when enumerated. For high-powered USB devices the current limit when
enumerated is between 100mA and 500mA, for low-powered USB devices the current limit is
100mA.
4 Module Dimensions
2.00
Measurements given in millimetres
Tolerance +/-0.1mm
44.5
14.1
15.5
36.3
12.10
2.54
14.9
2.4
Figure 4.1 UMFT234XD-01 Module Dimensions
6
Copyright © 2015 Future Technology Devices International Limited
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
5 Module Wire Connections
5.1 UMFT234XD-WE Wire Connections
GND
RTS#
VBUS
GND
2
1
5
7
9
8
Wire 6"
3BLACK
BROWN
RED
ORANGE
YELLOW
GREEN
6
4
10
8
9
7
5
1
2
10
4
6
3
TXD
RXD
CTS#
CB0
RESET#
3v3
GREY
PURPLE
BLUE
WHITE
Figure 5.1 UMFT234XD-WE Wire Connections (numbers refer to pad numbers on the PCB)
Figure 5.1 illustrates the WE product as a cable. This is only for illustration purposes. The wire ended
product consists of individual wires not a cable
5.2 UMFT234XD-WE
Figure 5.2 UMFT234XD-WE Image
7
Copyright © 2015 Future Technology Devices International Limited
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
6 Module Circuit Schematic
6.1 UMFT234XD Schematic
Figure 6.1 UMFT234XD Circuit Schematic
7 Environmental Compliances
The UMFT234XD modules exclusively use lead free components, and are fully compliant with European
Union directive 2002/95/EC.
8
Copyright © 2015 Future Technology Devices International Limited
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
8 Internal MTP ROM Configuration
Following a power-on reset or a USB reset the FT234XD will scan its internal MTP ROM and read the USB
configuration descriptors stored there. The default values programmed into the internal MTP ROM in the
FT234XD used on the UMFT234XD are shown in Table 8.1.
Parameter
Value
Notes
USB Vendor ID (VID)
0403h
FTDI default VID (hex)
USB Product UD (PID)
6015h
FTDI default PID (hex)
Serial Number Enabled?
Yes
Serial Number
See Note
A unique serial number is generated and programmed into
the MTP ROM during final test of the UMFT234XD module.
Pull down I/O Pins in USB
Suspend
Disabled
Enabling this option will make the device pull down on the
UART interface lines when the power is shut off (PWREN#
is high).
Manufacturer Name
FTDI
Product Description
UMFT234XD
Max Bus Power Current
90mA
Power Source
Bus Powered
Device Type
FT234XD
USB Version
0200
Returns USB 2.0 device description to the host. Note: The
device is a USB 2.0 Full Speed device (12Mb/s).
Remote Wake Up
Enabled
Taking RI# low will wake up the USB host controller from
suspend.
High Current I/Os
Disabled
Enables the high drive level on the serial and CBUS I/O
pins.
Load VCP Driver
Enabled
Makes the device load the VCP driver interface for the
device.
CBUS0
PWREN#
Table 8.1 Default Internal MTP ROM Configuration
The internal MTP ROM in the FT234XD can be programmed over USB using the utility program FT_PROG.
FT_PROG can be downloaded from www.ftdichip.com. Users who do not have their own USB vendor ID
but who would like to use a unique Product ID in their design can apply to FTDI for a free block of unique
PIDs. Contact FTDI Support (support1@ftdichip.com) for this service.
9
Copyright © 2015 Future Technology Devices International Limited
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
9 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
Branch Office Taipei, 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
E-mail (Support)
tw.support1@ftdichip.com
E-mail (General Enquiries)
tw.admin1@ftdichip.com
Branch Office Hillsboro, Oregon, USA
7130 SW Fir Loop
Tigard, OR 97223-8160
USA
Tel: +1 (503) 547 0988
Fax: +1 (503) 547 0987
E-Mail (Sales)
us.sales@ftdichip.com
E-Mail (Support)
us.support@ftdichip.com
E-Mail (General Enquiries)
us.admin@ftdichip.com
Branch Office Shanghai, China
Room 1103, No. 666 West Huaihai Road,
Shanghai, 200052
China
Tel: +86 (0)21 6235 1596
Fax: +86 (0)21 6235 1595
E-mail (Sales)
cn.sales@ftdichip.com
E-mail (Support)
cn.support@ftdichip.com
E-mail (General Enquiries)
cn.admin@ftdichip.com
Web Site
http://ftdichip.com
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.
System and equipment manufacturers and designers are responsible to ensure that their systems, and any Future Technology Devices International Ltd
(FTDI) devices incorporated in their systems, meet all applicable safety, regulatory and system-level performance requirements. All application-related
information in this document (including application descriptions, suggested FTDI devices and other materials) is provided for reference only. While FTDI
has taken care to assure it is accurate, this information is subject to customer confirmation, and FTDI disclaims all liability for system designs and for any
applications assistance provided by FTDI. Use of FTDI devices in life support and/or safety applications is entirely at the user’s risk, and the user agrees to
defend, indemnify and hold harmless FTDI from any and all damages, claims, suits or expense resulting from such use. This document is subject to change
without notice. No freedom to use patents or other intellectual property rights is implied by the publication of this document. Neither the whole nor any part
of the information contained in, or the product described in this document, may be adapted or reproduced in any material or electronic form without the prior
written consent of the copyright holder. Future Technology Devices International Ltd, Unit 1, 2 Seaward Place, Centurion Business Park, Glasgow G41
1HH, United Kingdom. Scotland Registered Company Number: SC136640
Copyright © 2013 Future Technology Devices International Limited 9
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
Appendix A - List of Figures and Tables
List of Figures
Figure 4.1 UMFT234XD-01 Module Dimensions ........................................................................................... 5
Figure 5.1 UMFT234XD-WE Wire Connections (numbers refer to pad numbers on the PCB) ................ 6
Figure 5.2 UMFT234XD-WE Image ................................................................................................................. 6
Figure 6.1 UMFT234XD Circuit Schematic .................................................................................................... 7
List of Tables
Table 3.1 USB Connector Pin Out Description ............................................................................................. 3
Table 3.2 UART Module Pin Out Description ................................................................................................ 3
Table 3.3 CBUS Configuration Control .......................................................................................................... 4
Table 8.1 Default Internal MTP ROM Configuration ..................................................................................... 8
Copyright © 2013 Future Technology Devices International Limited 10
UMFT234XD Datasheet
Version 1.1
Document Reference No.: FT_000801 Clearance No.: FTDI# 327
Appendix B: Revision History
Document Title: UMFT234XD
Document Reference No.: FT_000801
Clearance No.: FTDI# 327
Product Page: http://www.ftdichip.com/FT-X.htm
Document Feedback: Send Feedback
Version 1.0 Initial Datasheet Created 31/01/13
Version 1.1 Corrected -01 part number 06/07/15