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UM232R

USB-Serial UART Development Module

Future Technology 

Page 2

1. Features

1.1 Hardware Features

• Single chip USB to asynchronous 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.

• Data transfer rates from 300 baud to 3 Megabaud

(RS422 / RS485 and at TTL levels) and 300 baud

to 1 Megabaud (RS232).

• FTDI’s royalty-free VCP and D2XX drivers

eliminate the requirement for USB driver

development in most cases.

• In-built support for event characters and line break

condition.

• New USB FTDIChip-ID™ feature.

• New configurable CBUS I/O pins.

• Auto transmit buffer control for RS485 applications.

• Transmit and receive LED drive signals.

• New 48MHz, 24MHz,12MHz, and 6MHz clock

output signal Options for driving external MCU or

FPGA.

• FIFO receive and transmit buffers for high data

throughput.

• Adjustable receive buffer timeout.

• Synchronous and asynchronous bit bang mode

interface options with RD# and WR# strobes.

• New CBUS bit bang mode option.

• Integrated 1024 bit internal EEPROM for storing

USB VID, PID, serial number and product

description strings, and CBUS I/O configuration.

• Device supplied preprogrammed with unique USB

serial number.

1.2 Driver Support

Royalty-Free VIRTUAL COM PORT

(VCP) DRIVERS for...

• Windows 98, 98SE, ME, 2000, Server 2003, XP.

• Windows Vista / Longhorn*

• Windows XP 64-bit.*

• Windows XP Embedded.

• Windows CE.NET 4.2 & 5.0

• MAC OS 8 / 9, OS-X

• Linux 2.4 and greater

• Support for USB suspend and resume.

• Support for bus powered, self powered, and high-

power bus powered USB configurations.

• On board jumper allows for selection of USB bus

powered supply or self powered supply.

• Integrated 3.3V level converter for USB I/O.

• Integrated level converter on UART and CBUS for

interfacing to 5V - 1.8V Logic.

• On board jumper allows for selection of UART and

CBUS interface IO voltage.

• True 5V / 3.3V / 2.8V / 1.8V CMOS drive output

and TTL input.

• High I/O pin output drive option.

• Integrated USB resistors.

• Integrated power-on-reset circuit.

• Fully integrated clock - no external crystal,

oscillator, or resonator required.

• Fully integrated AVCC supply filtering - No separate

AVCC pin and no external R-C filter required.

• UART signal inversion option.

• USB bulk transfer mode.

• 3.3V to 5.25V Single Supply Operation.

• Low operating and USB suspend current.

• Low USB bandwidth consumption.

• UHCI / OHCI / EHCI host controller compatible

• USB 2.0 Full Speed compatible.

• -40°C to 85°C extended operating temperature

range.

• Supplied in PCB designed to fit a standard 15.0mm

(0.6”) wide 24 pin DIP socket. Pins are on a

2.60mm (0.1”) pitch.

• On board USB ‘B’ socket allows module to be

connected to a PC via a standard A to B USB

cable.

Royalty-Free D2XX Direct Drivers

(USB Drivers + DLL S/W Interface)

• Windows 98, 98SE, ME, 2000, Server 2003, XP.

• Windows Vista / Longhorn*

• Windows XP 64-bit.*

• Windows XP Embedded.

• Windows CE.NET 4.2 & 5.0

• Linux 2.4 and greater

The drivers listed above are all available to download for free from the FTDI website. Various 3rd Party Drivers are

also available for various other operating systems - see the FTDI website for details.

* Currently Under Development. Contact FTDI for availability.

1.3 Typical Applications

• USB to RS232 / RS422 / RS485 Converters

• USB Industrial Control

• Upgrading Legacy Peripherals to USB

• USB MP3 Player Interface

• Cellular and Cordless Phone USB data transfer

• USB FLASH Card Reader / Writers

cables and interfaces

• Set Top Box PC - USB interface

• Interfacing MCU / PLD / FPGA based designs to

• USB Digital Camera Interface

USB

• USB Hardware Modems

• USB Audio and Low Bandwidth Video data transfer • USB Wireless Modems

• PDA to USB data transfer

• USB Bar Code Readers

• USB Smart Card Readers

• USB Software / Hardware Encryption Dongles

• USB Instrumentation

UM232R USB-Serial UART Development Module Datasheet Version 1.02

© Future Technology Devices International Ltd. 2005

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