UMFT234XD-01 - FTDI, Future Technology Devices International Ltd

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

Royalty-Free D2XX Direct Drivers:

 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.

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

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

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.

D-

Signal

Negative USB data signal

D+

Signal

Positive USB data signal

GND

PWR

Module Ground

Table 3.1 USB Connector Pin Out Description

3.2 UMFT234XD CN2 Signal Descriptions

Pin No.

Name

Type

Description

TXD

Output

UART transmit data

VBUS

PWR

Output

5V Power output USB port.

GND

PWR

Module Ground Supply

RESET#

Input

Can be used by an external device to reset the FT234XD.

RXD

Input

UART receive data

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.

RTS#

Output

UART Ready to Send handshake signal

GND

PWR

Module Ground Supply

CTS#

Input

UART Clear to Send handshake signal

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

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.

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

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

Wire 6"

3BLACK

BROWN

RED

ORANGE

YELLOW

GREEN

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

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.

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.

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

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

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

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Version 1.0 Initial Datasheet Created 31/01/13

Version 1.1 Corrected -01 part number 06/07/15