Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
Future Technology Devices
International Ltd
.
FT232R USB UART IC
The FT232R is a USB to serial UART
interface with the following advanced
features:
Single chip USB to asynchronous serial data
transfer interface.
Entire USB protocol handled on the chip. No
USB specific firmware programming required.
Fully integrated 1024 bit EEPROM storing
device descriptors and CBUS I/O configuration.
Fully integrated USB termination resistors.
Fully integrated clock generation with no
external crystal required plus optional clock
output selection enabling a glue-less interface
to external MCU or FPGA.
Data transfer rates from 300 baud to 3 Mbaud
(RS422, RS485, RS232 ) at TTL levels.
128 byte receive buffer and 256 byte transmit
buffer utilising buffer smoothing technology to
allow for high data throughput.
FTDI‟s royalty-free Virtual Com Port (VCP) and
Direct
(D2XX)
drivers
eliminate
the
requirement for USB driver development in
most cases.
Unique USB FTDIChip-ID™ feature.
Configurable CBUS I/O pins.
Transmit and receive LED drive signals.
UART interface support for 7 or 8 data bits, 1
or 2 stop bits and odd / even / mark / space /
no parity
FIFO receive and transmit buffers for high data
throughput.
Synchronous and asynchronous bit bang
interface options with RD# and WR# strobes.
Device supplied pre-programmed with unique
USB serial number.
Supports bus powered, self powered and high-
power bus powered USB configurations.
Integrated +3.3V level converter for USB I/O.
Integrated level converter on UART and CBUS
for interfacing to between +1.8V and +5V
logic.
True 5V/3.3V/2.8V/1.8V CMOS drive output
and TTL input.
Configurable I/O pin output drive strength.
Integrated power-on-reset circuit.
Fully integrated AVCC supply filtering - no
external filtering required.
UART signal inversion option.
+3.3V (using external oscillator) to +5.25V
(internal oscillator) 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.
Available in compact Pb-free 28 Pin SSOP and
QFN-32 packages (both RoHS compliant).
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 Company Number: SC136640
Copyright © 2010 Future Technology Devices International Limited
1
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
1
Typical Applications
USB to RS232/RS422/RS485 Converters
Upgrading Legacy Peripherals to USB
Cellular and Cordless Phone USB data transfer
cables and interfaces
Interfacing MCU/PLD/FPGA based designs to
USB
USB Audio and Low Bandwidth Video data
transfer
PDA to USB data transfer
USB Smart Card Readers
USB Instrumentation
USB Industrial Control
USB MP3 Player Interface
USB FLASH Card Reader and Writers
Set Top Box PC - USB interface
USB Digital Camera Interface
USB Hardware Modems
USB Wireless Modems
USB Bar Code Readers
USB Software and Hardware Encryption
Dongles
1.1 Driver Support
Royalty free VIRTUAL COM PORT
(VCP) DRIVERS for...
Windows 98, 98SE, ME, 2000, Server 2003, XP
and Server 2008
Windows 7 32,64-bit
Windows XP and XP 64-bit
Windows Vista and Vista 64-bit
Windows XP Embedded
Windows CE 4.2, 5.0 and 6.0
Mac OS 8/9, OS-X
Linux 2.4 and greater
The drivers listed above are all available to download for free from FTDI website (www.ftdichip.com).
Various 3rd party drivers are also available for other operating systems - see FTDI website
(www.ftdichip.com) for details.
For driver installation, please refer to
http://www.ftdichip.com/Documents/InstallGuides.htm
Royalty free D2XX
Direct
Drivers
(USB Drivers + DLL S/W Interface)
Windows 98, 98SE, ME, 2000, Server 2003, XP
and Server 2008
Windows 7 32,64-bit
Windows XP and XP 64-bit
Windows Vista and Vista 64-bit
Windows XP Embedded
Windows CE 4.2, 5.0 and 6.0
Linux 2.4 and greater
1.2 Part Numbers
Part Number
Package
FT232RQ-xxxx
FT232RL-xxxx
Note: Packing codes for xxxx is:
32 Pin QFN
28 Pin SSOP
- Reel: Taped and Reel, (SSOP is 2,000pcs per reel, QFN is 6,000pcs per reel).
- Tube: Tube packing, 47pcs per tube (SSOP only)
- Tray: Tray packing, 490pcs per tray (QFN only)
For example: FT232RQ-Reel is 6,000pcs taped and reel packing
Copyright © 2010 Future Technology Devices International Limited
2
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
1.3 USB Compliant
The FT232R is fully compliant with the USB 2.0 specification and has been given the USB-IF Test-ID (TID)
40680004.
Copyright © 2010 Future Technology Devices International Limited
3
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
2
VCC
FT232R Block Diagram
SLEEP#
48MHz
3.3 Volt
LDO
Regulator
Baud Rate
Generator
3V3OUT
FIFO RX
Buffer
USBDP
USBDM
USB
Transceiver
with
Integrated
Series
Resistors
and 1.5K
Pull-
up
Serial Interface
Engine
( SIE )
USB
Protocol Engine
UART
FIFO Controller
UART Controller
with
Programmable
Signal Inversion
DBUS0
DBUS1
DBUS2
DBUS3
DBUS4
DBUS5
DBUS6
DBUS7
Internal
EEPROM
USB DPLL
3V3OUT
CBUS0
CBUS1
CBUS2
CBUS3
CBUS4
FIFO TX Buffer
OSCO
(optional)
OCSI
(optional)
Internal
12MHz
Oscillator
x4 Clock
Multiplier
RESET#
To USB Transeiver Cell
Reset
Generator
48MHz
TEST
GND
Figure 2.1 FT232R Block Diagram
For a description of each function please refer to Section 4.
Copyright © 2010 Future Technology Devices International Limited
4
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
Table of Contents
1
Typical Applications ........................................................................ 2
1.1
1.2
1.3
Driver Support .................................................................................... 2
Part Numbers...................................................................................... 2
USB Compliant .................................................................................... 3
Note: Packing codes for xxxx is: .................................................................. 2
2
3
FT232R Block Diagram .................................................................... 4
Device Pin Out and Signal Description ............................................ 7
3.1
3.2
3.3
3.4
3.5
28-LD SSOP Package .......................................................................... 7
SSOP Package Pin Out Description...................................................... 7
QFN-32 Package ............................................................................... 10
QFN-32 Package Signal Description .................................................. 10
CBUS Signal Options ......................................................................... 13
Key Features ..................................................................................... 14
Functional Block Descriptions ........................................................... 15
Absolute Maximum Ratings............................................................... 17
DC Characteristics............................................................................. 18
EEPROM Reliability Characteristics ................................................... 21
Internal Clock Characteristics ........................................................... 21
USB Bus Powered Configuration ...................................................... 23
Self Powered Configuration .............................................................. 24
USB Bus Powered with Power Switching Configuration .................... 25
USB Bus Powered with Selectable External Logic Supply .................. 26
USB to RS232 Converter ................................................................... 27
USB to RS485 Coverter ..................................................................... 28
USB to RS422 Converter ................................................................... 29
USB to MCU UART Interface .............................................................. 30
LED Interface .................................................................................... 31
Using the External Oscillator ............................................................ 32
4
Function Description ..................................................................... 14
4.1
4.2
5
Devices Characteristics and Ratings.............................................. 17
5.1
5.2
5.3
5.4
6
USB Power Configurations ............................................................ 23
6.1
6.2
6.3
6.4
7
Application Examples .................................................................... 27
7.1
7.2
7.3
7.4
7.5
7.6
8
9
Internal EEPROM Configuration .................................................... 33
Package Parameters ..................................................................... 35
9.1
SSOP-28 Package Dimensions .......................................................... 35
Copyright © 2010 Future Technology Devices International Limited
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