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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): support1@ftdichip.com 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 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

Future Technology Devices

International Ltd

UM232R USB - Serial UART

Development Module

Datasheet

Document Reference No.: FT_000051

Version 1.1

Issue Date: 2011-11-25

Summary of content (28 pages)

PAGE 1
Future Technology Devices International Ltd UM232R USB - Serial UART Development Module Datasheet Document Reference No.: FT_000051 Version 1.1 Issue Date: 2011-11-25 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): support1@ftdichip.com Web: http://www.ftdichip.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 1 Introduction The UM232R is a development module which uses FTDI‟s FT232RL, one of FTDI‟s range of USB to UART interface integrated circuit devices. The FT232RL is a USB to serial UART interface with optional clock generator output, and the FTDIChip-ID™ security dongle feature. In addition, asynchronous and synchronous bit bang interface modes are available.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 Table of Contents 1 Introduction .................................................................... 1 2 Typical Application .......................................................... 3 3 2.1 Driver Support .......................................................................... 3 2.2 Features ................................................................................
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 2.2 Features The UM232R has the following features: Single chip USB to UART synchronous serial data transfer interface Entire USB protocol handled on the chip – No USB-specific firmware programming required. UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity. Fully assisted hardware or X-On / X-Off software handshaking.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 3 3.1 FT232RL Features and Enhancement Key Features This section summarises the key features and enhancements of the FT232RL IC device which is used on the UM232R Module. For further details, consult the FT232R datasheet, which is available from www.ftdichip.com.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 Integrated Level Converter on UART Interface and Control Signals – VCCIO pin supply can be from 1.8V to 5V. Connecting the VCCIO pin to 1.8V, 2.8V, or 3.3V allows the device to directly interface to 1.8V, 2.8V or 3.3V and other logic families without the need for external level converter I.C. devices. 5V / 3.3V / 2.8V / 1.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 4 UM232R Pin Out and Signal Descriptions 4.1 UM232R Pin Out Figure 4.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 4.2 Signal Descriptions Pin No. Name Type Description 1 TXD Output Transmit Asynchronous Data Output.* 2 DTR# Output Data Terminal Ready Control Output / Handshake Signal.* 3 RTS# Output Request to Send Control Output / Handshake Signal.* +1.8V to +5.25V supply to the UART Interface and CBUS I/O pins (1...3, 5, 6, 9...14, 22, 23).
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 Pin No. Name Type Description 20 RST# Input Can be used by an external device to reset the FT232R. If not required can be left unconnected, or pulled up to VCCIO. 22 CB1 I/O Configurable CBUS I/O Pin. Function of this pin is configured in the device internal EEPROM. Factory Default pin Function is RXLED#. See CBUS Signal Options, Table 4.4.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 4.4 CBUS Signal Options The following options can be configured on the CBUS I/O pins. These options are all configured in the internal EEPROM using the utility software FT_PROG, which can be downloaded from the www.ftdichip.com. The default configuration is described in Section 9.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 5 Module Dimensions Figure 5.1 UM232R Module Dimensions All dimensions are in millimetres, with inches in parenthesis. The FT232RL is supplied in a RoHS compliant 28 pin SSOP package. The package is lead (Pb) free and uses a „green# compound. The date code format is YYXX where XX = 2 digit week number, YY = 2 digit year number.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 6 FT232RL Device Characteristics and Ratings 6.1 Absolute Maximum Ratings The absolute maximum ratings for the FT232R devices are as follows. These are in accordance with the Absolute Maximum Rating System (IEC 60134). Exceeding these may cause permanent damage to the device.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 Parameter Description Minimum Typical Maximum Units Conditions Voh Output Voltage High 3.2 4.1 4.9 V I source = 2mA Vol Output Voltage Low 0.3 0.4 0.6 V I sink = 2mA Vin Input Switching Threshold 1.3 1.6 1.9 V ** Vhys Input Switching Hysteresis 50 55 60 mV ** Table 6.3 UART and CBUS I/O Pin Characteristics (VCCIO = 5.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 Parameter Description Minimum Typical Maximum Units Conditions Voh Output Voltage High 2.1 2.8 3.2 V I source = 3mA Vol Output Voltage Low 0.3 0.4 0.6 V I sink = 8mA Vin Input Switching Threshold 1.0 1.2 1.5 V ** Vhys Input Switching Hysteresis 20 25 30 mV ** Table 6.8 UART and CBUS I/O Pin Characteristics (VCCIO = 2.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 6.3 EEPROM Reliability Characteristics The internal 1024 bit EEPROM has the following reliability characteristics: Parameter Value Unit Data Retention 15 Years Read / Write Cycle 100,000 Cycles Table 6.11 EEPROM Characteristics 6.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 7 Module Configurations 7.1 BUS Powered Configuration Figure 7.1 Bus Powered Configuration Figure 7.1 illustrates the UM232R module in a typical USB bus powered design configuration. This can easily be done by fitting the jumper link on J2, as shown above. The UM232R is supplied in this configuration by default. A USB Bus Powered device gets its power from the USB bus.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 7.2 Self Powered Configuration Vcc = 3.3V – 5V Vcc = 4.0V – 5V UM232R © FTDI 2008 TXD 1 1 2 3 24 GND 21 VCC 20 RST# 17 PU1 16 PU2 15 VCC 14 USB J1 TXD RXD RTS# 3 CTS# RXD 5 GND 7 FTDI FT232RL RTS# MCU CTS# 10 2 J2 12 1 13 Figure 7.2 Self-Powered Configuration Figure 7.2 illustrates the UM232R in a typical USB self powered configuration.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 Figure 7.2 is also an example of interfacing the FT232R to a Microcontroller (MCU) UART interface. This example uses TXD and RXD for transmission and reception of data and RTS# / CTS# hardware handshaking. Optionally, RI# can be connected to another I/O pin on the MCU and could be used to wake up the USB host controller from suspend mode.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 7.3 USB Bus Powered with Power Switching Confiduration P-Channel Power MOSFET s d UM232R © FTDI 2008 TXD 1 1 2 0.1uF Soft Start Circuit J1 TXD RXD 5 GND 7 FTDI RXD FT232RL CTS# 1K RTS# 3 RTS# 0.1uF g 24 3 MCU CTS# 18 CB3 (PWREN#) 10 2 1 J2 12 14 USB 13 Figure 7.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 v) For 3.3V power controlled circuits the FT232R‟s VCCIO pin must not be powered down with the external circuitry (the PWREN# signal gets its VCC supply from VCCIO). Either connects the power switch between the output of the 3.3V regulator and the external 3.3V logic or power VCCIO from the 3V3OUT pin of the FT232R.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 7.4 Bus Powered with 3.3V Logic Drive / IO Supply Voltage UM232R © FTDI 2008 1 1 2 3 24 J1 FTDI FT232RL 2 1 J2 12 13 Figure 7.4 USB Bus Powered 3.3V Logic Drive Figure 7.4 shows a configuration where a jumper switch is used to allow the FT232R to be interfaced with a 3.3V or 5V logic devices.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 UM232R Module Circuit Schematic 8 CN1 PU2 PU1 R2 R1 5 10k 10k SLD GND J2 2 1 1 USB VCC Ferrite Bead FB1 VCC VIO 3V3 47pF + + C2 C1 10nF + C3 47pF + GND 4.7uF + C6 J1 1 3 2 RST# VIO VCC VCC 3V3 0.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 9 Internal EEPROM Configuration Following a power-on reset or a USB reset the FT232R will scan its internal EEPROM and read the USB configuration descriptors stored there. The default values programmed into the internal EEPROM in the FT232RL used on the UM232R are shown in Table 8.1.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 The internal EEPROM in the FT232R 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.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 10 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) E-mail (Support) E-mail (General Enquiries) Web Site URL Web Shop URL sales1@ftdichip.com support1@ftdichip.com admin1@ftdichip.
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 Appendix A – List of Tables and Figures List of Tables Table 4.1Module Pin Out Description .......................................................................... 9 Table 4.2 Jumper J1 Pin Description ........................................................................... 9 Table 4.3 Jumper J2 Pin Description ....................................................................
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Document Reference No.: FT_000051 UM232R USB - Serial UART Development Module Datasheet Version 1.1 Clearance No.: FTDI# 125 Appendix B – Revision History Version 0.9 Initial Datasheet Created August 2005 Version 1.00 Full Datasheet Release December 2005 Version 1.01 Circuit Schematic Diagram Update January 2006 Version 1.02 Module PCB Length Dimensions January 2006 Version 1.03 Signal Description Update May 2008 Version 1.04 Table 4.