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 © Future Technology Devices International Limited 1
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
Future Technology
Devices
International Ltd
Datasheet
UM232H-B USB to
Serial/Parallel Break-Out
Module
UM232H-B is a multiple-interface Hi-Speed USB to UART, 245 FIFO,
FT1248, I2C, SPI and GPIO break-out module.
1 Introduction
The UM232H-B is a development module for FTDI’s
FT232H Hi-Speed to Serial/Parallel interface
converter. This single interface channel IC can be
configured to transfer data over the following
interfaces UART, 245 FIFO, FT1248, I2C, SPI and
GPIO.
For detail on FT232H, refer to the FT232H
datasheet.
1.1 Features
This hardware is a breakout board that converts Hi-
Speed USB2.0 to a serial/parallel interface and
connects the signals to a 2.00mm pitch 18pin
female receptacle. No USB connector is used,
instead this modules plugs directly into the USB
host connector and the pads of the PCB makes
electrical contact with the electrical contacts of the
host USB connector.
All signals on these modules operate at +3.3V
voltage levels, however all I/Os are 5V tolerant.
Copyright © Future Technology Devices International Limited 2
UM232H-B Datasheet
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Document Reference No.: FT_000721 Clearance No.: FTDI# 320
2 Driver Support
Royalty-Free VIRTUAL COM PORT (VCP)
DRIVERS for:
Windows 10 32,64-bit
Windows 8 and 8.1 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 (USB Drivers
+ DLL S/W Interface):
Windows 10 32,64-bit
Windows 8 and 8.1 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. Third Party Drivers
are also available for other operating systems - visit www.ftdichip.com for details.
Copyright © Future Technology Devices International Limited 3
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
Table of Contents
1 Introduction .................................................................... 1
1.1 Features .................................................................................... 1
2 Driver Support ................................................................ 2
3 Ordering Information ...................................................... 4
4 UM232H-B Signals and Configurations ............................ 5
4.1 UM232H-B Pin Out .................................................................... 5
4.2 UM232H-B Signals .................................................................... 6
4.3 CBUS Signal Options ................................................................. 7
4.4 Configuring the EEPROM ........................................................... 8
5 Module Dimensions ......................................................... 9
6 UM232H-B-WE Wire Colours .......................................... 10
7 UM232H-B Module Circuit Schematic ............................. 11
8 Internal MTP ROM Configuration ................................... 12
9 Contact Information ...................................................... 13
Appendix A References ................................................... 14
Document References ..................................................................... 14
Acronyms and Abbreviations ........................................................... 14
Appendix B List of Figures and Tables ............................. 15
List of Figures ................................................................................. 15
List of Tables ................................................................................... 15
Appendix C Revision History ........................................... 16
Copyright © Future Technology Devices International Limited 4
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
3 Ordering Information
Module Code
Utilised IC Code
Description
UM232H-B
FT232H
Single Channel USB to Serial/Parallel interface break-out board, with a
female header.
UM232H-B-NC
FT232H
Single Channel USB to Serial/Parallel interface break-out board, with
solder pads only.
UM232H-B-WE
FT232H
Single Channel USB to Serial/Parallel interface break-out board, with 6
flying leads connected to the signal pads.
Table 3.1 Ordering Information
Copyright © Future Technology Devices International Limited 5
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
4 UM232H-B Signals and Configurations
4.1 UM232H-B Pin Out
Figure 4.1 Module Pin Out
Figure 4.1 illustrates the signals available on the signal pads. The top figure shows the pinout when the
module is viewed from the top side. The bottom figure shows the pinout when the module is viewed from
the bottom side.
Note: Take care when plugging module into a deep recessed USB port, it may damage component C1.
Copyright © Future Technology Devices International Limited 6
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
4.2 UM232H-B Signals
A list of all the pins and signals are given in Table 4.2. The EEPROM configuration determines the signal
assigned to a pin.
Pins marked * are EEPROM selectable
Table 4.1 List of the Modules Signals
Pins marked ** default to tri-stated inputs with an internal 75KΩ (approx.) pull up resistor to VCCIO.
Pin marked *** default to GPIO line with an internal 75KΩ pull down resistor to GND. Using the EEPROM
this pin can be enabled USBVCC mode instead of GPIO mode.
FT232H
Pin
Pin functions (depends on configuration)
Pin
#
Pin
Name
ASYNC
Serial
(RS232)
SYNC
245 FIFO
STYLE
ASYNC
245 FIFO
ASYNC
Bit-bang
SYNC
Bit-bang
MPSSE
Fast Serial
interface
CPU Style
FIFO
FT1248
13
ADBUS0
TXD
D0
D0
D0
D0
TCK/SK
FSDI
D0
MIOSI0
14
ADBUS1
RXD
D1
D1
D1
D1
TDI/DO
FSCLK
D1
MIOSI1
15
ADBUS2
RTS#
D2
D2
D2
D2
TDO/DI
FSDO
D2
MIOSI2
16
ADBUS3
CTS#
D3
D3
D3
D3
TMS/CS
FSCTS
D3
MIOSI3
17
ADBUS4
DTR#
D4
D4
D4
D4
GPIOL0
**
TriSt-UP
D4
MIOSI4
18
ADBUS5
DSR#
D5
D5
D5
D5
GPIOL1
**
TriSt-UP
D5
MIOSI5
19
ADBUS6
DCD#
D6
D6
D6
D6
GPIOL2
**
TriSt-UP
D6
MIOSI6
20
ADBUS7
RI#
D7
D7
D7
D7
GPIOL3
**
TriSt-UP
D7
MIOSI7
21
ACBUS0
*
TXDEN
RXF#
RXF#
ACBUS0
ACBUS0
GPIOH0
**
ACBUS0
CS#
SCLK
25
ACBUS1
**
ACBUS1
TXE#
TXE#
WRSTB#
WRSTB#
GPIOH1
**
ACBUS1
A0
SS_N
26
ACBUS2
**
ACBUS2
RD#
RD#
RDSTB#
RDSTB#
GPIOH2
**
ACBUS2
RD#
MISO
27
ACBUS3
*
RXLED#
WR
WR
ACBUS3
ACBUS3
GPIOH3
**
ACBUS3
WR
ACBUS3
28
ACBUS4
*
TXLED#
SIWU#
SIWU#
SIWU#
SIWU#
GPIOH4
SIWU#
SIWU#
ACBUS4
29
ACBUS5
**
ACBUS5
CLKOUT
ACBUS5
**
ACBUS5
**
ACBUS5
GPIOH5
**
ACBUS5
**
ACBUS5
ACBUS5
30
ACBUS6
**
ACBUS6
OE#
ACBUS6
ACBUS6
ACBUS6
GPIOH6
**
ACBUS6
**
ACBUS6
ACBUS6
31
ACBUS7
PWRSAV#
PWRSAV#
PWRSAV#
PWRSAV#
PWRSAV#
***
GPIOH7
PWRSAV#
PWRSAV#
PWRSAV#
32
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
**
ACBUS8
ACBUS8
33
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
**
ACBUS9
ACBUS9
Copyright © Future Technology Devices International Limited 7
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
The following 2 tables provide a description of the signals available on each pin of the UM232H module
Pin No.
IC Port
Name
PCB
Port
Name
Type
Description
CN2-1
ADBUS0
D0
Input/Output
EEPROM configurable data transfer pin
CN2-2
ADBUS1
D1
Input/Output
EEPROM configurable data transfer pin
CN2-3
ADBUS2
D2
Input/Output
EEPROM configurable data transfer pin
CN2-4
ADBUS3
D3
Input/Output
EEPROM configurable data transfer pin
CN2-5
ADBUS4
D4
Input/Output
EEPROM configurable data transfer pin
CN2-6
ADBUS5
D5
Input/Output
EEPROM configurable data transfer pin
CN2-7
ADBUS6
D6
Input/Output
EEPROM configurable data transfer pin
CN2-8
ADBUS7
D7
Input/Output
EEPROM configurable data transfer pin
CN2-9
ACBUS0
C0
Input/Output
EEPROM configurable control Pin, See Table 4.3
CN2-10
ACBUS1
C1
Input/Output
EEPROM configurable control Pin, See Table 4.3
CN2-11
ACBUS2
C2
Input/Output
EEPROM configurable control Pin, See Table 4.3
CN2-12
ACBUS3
C3
Input/Output
EEPROM configurable control Pin, See Table 4.3
CN2-13
ACBUS4
C4
Input/Output
EEPROM configurable control Pin, See Table 4.3
CN2-14
ACBUS5
C5
Input/Output
EEPROM configurable control Pin, See Table 4.3
CN2-15
ACBUS6
C6
Input/Output
EEPROM configurable control Pin, See Table 4.3
CN2-16
ACBUS7
C7
Input/Output
EEPROM configurable control Pin, See Table 4.3
CN2-17
-
5V
Power
5V power output, 500mA limit, protected by a 750mA fuse.
CN2-18
GND
GND
Ground
Module Ground
Table 4.2 Module Pin Out Description
4.3 CBUS Signal Options
The following options can be configured on the CBUS I/O pins. These options are all configured in the
internal MTP ROM using the utility software FT_PROG, which can be downloaded from the
www.ftdichip.com. The default configuration is described in Section 8.
ACBUS
Signal
Option
Available On ACBUS Pin
Description
TXDEN
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS8,
ACBUS9
TXDEN = (TTL level). Used with RS485 level converters to
enable the line driver during data transmit. TXDEN is
active from one-bit time before the start bit is transmitted
on TXD until one bit time after the last stop bit.
*PWREN#
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS8,
ACBUS9
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 P-Channel logic
level MOSFET switch. Enable the interface pull-down
option when using the PWREN# in this way.*
TXLED#
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS8,
ACBUS9
TXLED = Transmit signalling output. Pulses low when
transmitting data (TXD) to the external device. This can
be connected to an LED.
RXLED#
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS8,
ACBUS9
RXLED = Receive signalling output. Pulses low when
receiving data (RXD) from the external device. This can be
connected to an LED.
Copyright © Future Technology Devices International Limited 8
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
ACBUS
Signal
Option
Available On ACBUS Pin
Description
TX&RXLED#
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS8,
ACBUS9
LED drive pulses low when transmitting or receiving data
from or to the external device. For more details, refer to
the FT232H datasheet on the FTDI website.
SLEEP#
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS8,
ACBUS9
Goes low during USB suspend mode. Typically used to
power down an external TTL to RS232 level converter IC
in USB to RS232 converter designs.
**CLK30
ACBUS0, ACBUS5, ACBUS6,ACBUS8,
ACBUS9
30MHz Clock output.
**CLK15
ACBUS0, ACBUS5, ACBUS6,ACBUS8,
ACBUS9
15MHz Clock output.
**CLK7.5
ACBUS0, ACBUS5, ACBUS6,ACBUS8,
ACBUS9
7.5MHz Clock output.
TriSt-PU
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS8,
ACBUS9
Input Pull Up
DRIVE 1
ACBUS0, ACBUS5, ACBUS6,ACBUS8,
ACBUS9
Output High
DRIVE 0
ACBUS0, ACBUS1, ACBUS2, ACBUS3,
ACBUS4, ACBUS5, ACBUS6, ACBUS8,
ACBUS9
Output Low
I/O mode
ACBUS5, ACBUS6,ACBUS8, ACBUS9
ACBUS BitBang
Table 4.3 CBUS Signal Options
**When in USB suspend mode the outputs clocks are also suspended.
4.4 Configuring the EEPROM
The UM232H-B contains an on-board EEPROM. This can be used to configure the functions of each CBUS
pin, the current drive on each signal pin, current limit for the USB bus and the other descriptors of the
device. For details on using the EEPROM programming utility FT_PROG, please see the FT_PROG User
Guide.
Copyright © Future Technology Devices International Limited 9
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
5 Module Dimensions
3.6 15.6
19.2
14.0
17.6 38.5
2.0
Figure 5.1 UM232H-B Module Dimensions
All dimensions are given in millimetres.
The UM232H-B module exclusively uses lead free components, and is fully compliant with European Union
directive 2002/95/EC.
Copyright © Future Technology Devices International Limited 10
UM232H-B Datasheet
Version 1.3
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6 UM232H-B-WE Wire Colours
The WE variant is supplied with a short cable. The wire colours are matched to signals as indicated
below.
Figure 6.1 UM232H-B-WE Wire Colours (Top View)
Figure 6.2 UM232H-B-WE Wire Colours (Bottom View)
Copyright © Future Technology Devices International Limited 11
UM232H-B Datasheet
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7 UM232H-B Module Circuit Schematic
Figure 7.1 Module Circuit Schematic
Copyright © Future Technology Devices International Limited 12
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
8 Internal MTP ROM Configuration
Following a power-on reset or a USB reset the FT232H will scan its internal EEPROM and read the USB
configuration descriptors stored there. The default values programmed into the external EEPROM for the
FT232H used on the UM232H-B are shown in Table 8.1.
Parameter
Value
Notes
USB Vendor ID (VID)
0403h
FTDI default VID (hex)
USB Product UD (PID)
6014h
FTDI default PID (hex)
Serial Number Enabled?
Yes
Serial Number
See Note
A unique serial number is generated and programmed into
the EEPROM during final test of the UM232H-B 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
UM232H-B
Max Bus Power Current
90mA
Power Source
Bus Powered
Device Type
FT232H
USB Version
0200
Returns USB 2.0 device description to the host.
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 UART and CBUS I/O
pins.
Load VCP Driver
Enabled
Makes the device load the CVP driver interface for the
device.
CBUS0
TriSt-PU
Tristate Input pulled up
CBUS1
TriSt-PU
Tristate Input pulled up
CBUS2
TriSt-PU
Tristate Input pulled up
CBUS3
TriSt-PU
Tristate Input pulled up
CBUS4
TriSt-PU
Tristate Input pulled up
CBUS5
TriSt-PU
Tristate Input pulled up
CBUS6
TriSt-PU
Tristate Input pulled up
CBUS7
TriSt-PU
Tristate Input pulled up
CBUS8
PWREN#
Power Enable, low when FT232H enumerates, switches 5V
output power on when the device enumerates.
CBUS9
PWREN#
Power Enable, low when the FT232H enumerates, ,
switches the on board LED on when the device enumerates.
Table 8.1 Default EEPROM Configuration
The on board EEPROM can be programmed over USB using the utility program FT_PROG. FT_PROG can
be downloaded from the 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, also see TN_100 and TN_101.
Copyright © Future Technology Devices International Limited 13
UM232H-B Datasheet
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Document Reference No.: FT_000721 Clearance No.: FTDI# 320
9 Contact Information
Head Office Glasgow, UK
Branch Office Tigard, Oregon, USA
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
Future Technology Devices International Limited (USA)
7130 SW Fir Loop
Tigard, OR 97223-8160
USA
Tel: +1 (503) 547 0988
Fax: +1 (503) 547 0987
E-mail (Sales)
sales1@ftdichip.com
E-mail (Sales)
us.sales@ftdichip.com
E-mail (Support)
support1@ftdichip.com
E-mail (Support)
us.support@ftdichip.com
E-mail (General Enquiries)
admin1@ftdichip.com
E-mail (General Enquiries)
us.admin@ftdichip.com
Branch Office Taipei, Taiwan
Branch Office Shanghai, China
Future Technology Devices International Limited (Taiwan)
2F, No. 516, Sec. 1, NeiHu Road
Taipei 114
Taiwan , R.O.C.
Tel: +886 (0) 2 8797 1330
Fax: +886 (0) 2 8751 9737
Future Technology Devices International Limited (China)
Room 1103, No. 666 West Huaihai Road,
Shanghai, 200052
China
Tel: +86 21 62351596
Fax: +86 21 62351595
E-mail (Sales)
tw.sales1@ftdichip.com
E-mail (Sales)
cn.sales@ftdichip.com
E-mail (Support)
tw.support1@ftdichip.com
E-mail (Support)
cn.support@ftdichip.com
E-mail (General Enquiries)
tw.admin1@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 © Future Technology Devices International Limited 14
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
Appendix A References
Document References
FT232H Datasheet
Acronyms and Abbreviations
Terms
Description
EEPROM
Electrically Erasable Programmable Read-Only Memory
FIFO
First In First Out
I²C
Inter-Integrated Circuit
SPI
Serial Peripheral Interface
UART
Universal Asynchronous Receiver/Transmitter
USB
Universal Serial Bus
Copyright © Future Technology Devices International Limited 15
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
Appendix B List of Figures and Tables
List of Figures
Figure 4.1 Module Pin Out ........................................................................................................... 5
Figure 5.1 UM232H-B Module Dimensions ..................................................................................... 9
Figure 6.1 UM232H-B-WE Wire Colours (Top View) ...................................................................... 10
Figure 6.2 UM232H-B-WE Wire Colours (Bottom View) ................................................................. 10
Figure 7.1 Module Circuit Schematic ........................................................................................... 11
List of Tables
Table 3.1 Ordering Information .................................................................................................... 4
Table 4.1 List of the Modules Signals ............................................................................................ 6
Table 4.2 Module Pin Out Description............................................................................................ 7
Table 4.3 CBUS Signal Options .................................................................................................... 8
Table 8.1 Default EEPROM Configuration ..................................................................................... 12
Copyright © Future Technology Devices International Limited 16
UM232H-B Datasheet
Version 1.3
Document Reference No.: FT_000721 Clearance No.: FTDI# 320
Appendix C Revision History
Document Title: UM232H-B USB to Serial/Parallel Break-Out Module
Document Reference No.: FT_000721
Clearance No.: FTDI# 320
Product Page: http://www.ftdichip.com/fastlane.htm
Document Feedback: Send Feedback
Revision
Changes
Date
1.0
Initial Release
2012-10-30
1.1
Removed details about complementary male header
2015-02-09
1.2
Added ordering information and support for Win 10
2016-04-11
1.3
Removed “Invert UART” option and revised title of
Table 8.1
2016-08-24