DS232B Version 1.8

© Future Technology Devices Intl. Ltd. 2005

Page 1 of 25

FT232BM USB UART ( USB - Serial) I.C.

to its FT8U232AM predecessor and reduces external component count, but also maintains a high degree of pin

compatibility with the original, making it easy to upgrade or cost reduce existing designs as well as increasing the

potential for using the device in new application areas.

•

Single Chip USB Asynchronous Serial Data

Transfer

•

Full Handshaking & Modem Interface Signals

•

UART I/F Supports 7 / 8 Bit Data, 1 / 2 Stop Bits

and Odd/Even/Mark/Space/No Parity

•

Data rate 300 => 3M Baud (TTL)

•

Data rate 300 => 1M Baud (RS232)

•

Data rate 300 => 3M Baud (RS422/RS485)

•

384 Byte Receive Buffer / 128 Byte Transmit Buffer

for high data throughput

•

Adjustable RX buffer timeout

•

Fully Assisted Hardware or X-On / X-Off

Handshaking

•

In-built support for event characters and line break

condition

•

Auto Transmit Buffer control for RS485

•

Support for USB Suspend / Resume through

SLEEP# and RI# pins

•

Support for high power USB Bus powered devices

through PWREN# pin

•

Integrated level converter on UART and control

signals for interfacing to 5V and 3.3V logic

•

Integrated 3.3V regulator for USB IO

•

Integrated Power-On-Reset circuit

•

Integrated 6MHz – 48Mhz clock multiplier PLL

•

USB Bulk or Isochronous data transfer modes

•

4.35V to 5.25V single supply operation

•

UHCI / OHCI / EHCI host controller compatible

•

USB 1.1 and USB 2.0 compatible

•

USB VID, PID, Serial Number and Product

Description strings in external EEPROM

•

EEPROM programmable on-board via USB

•

Compact 32-LD LQFP package

VIRTUAL COM PORT (VCP) DRIVERS for

-

Windows 98 and Windows 98 SE

-

Windows 2000 / ME / Server 2003 / XP

-

Windows XP 64 Bit

-

Windows XP Embedded

-

Windows CE 4.2

-

MAC OS-8 and OS-9

-

MAC OS-X

-

Linux 2.40 and greater

D2XX (USB Direct Drivers + DLL S/W Interface)

-

Windows 98 and Windows 98 SE

-

Windows 2000 / ME / Server 2003 / XP

-

Windows XP 64 Bit

-

Windows XP Embedded

-

Windows CE 4.2

-

Linux 2.40 and greater

APPLICATION AREAS

-

USB RS232 Converters

-

USB  RS422 / RS485 Converters

-

Upgrading RS232 Legacy Peripherals to USB

-

Cellular and Cordless Phone USB data transfer

cables and interfaces

-

Interfacing MCU based designs to USB

-

USB Audio and Low Bandwidth Video data transfer

-

PDA  USB data transfer

-

USB Smart Card Readers

-

Set Top Box (S.T.B.) PC - USB interface

-

USB Hardware Modems

-

USB Wireless Modems

-

USB Instrumentation

-

USB Bar Code Readers

1.0 Features

HARDWARE FEATURES