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FT232R(FT232R).pdf
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
the
requirement for USB driver development in
most cases.
eliminate
(D2XX)
drivers
Unique USB FTDIChip-ID™ feature.
Configurable CBUS I/O pins.
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.
Transmit and receive LED drive signals.
USB 2.0 Full Speed compatible.
UART interface support for 7 or 8 data bits, 1
or 2 stop bits and odd / even / mark / space /
no parity
-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
1 Typical Applications
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
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 and Writers
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
1.1 Driver Support
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
Royalty free VIRTUAL COM PORT
(VCP) DRIVERS for...
Royalty free D2XX Direct Drivers
(USB Drivers + DLL S/W Interface)
Windows 98, 98SE, ME, 2000, Server 2003, XP
Windows 98, 98SE, ME, 2000, Server 2003, XP
and Server 2008
and Server 2008
Windows 7 32,64-bit
Windows 7 32,64-bit
Windows XP and XP 64-bit
Windows XP and XP 64-bit
Windows Vista and Vista 64-bit
Windows Vista and Vista 64-bit
Windows XP Embedded
Windows XP Embedded
Windows CE 4.2, 5.0 and 6.0
Windows CE 4.2, 5.0 and 6.0
Mac OS 8/9, OS-X
Linux 2.4 and greater
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
1.2 Part Numbers
Part Number
FT232RQ-xxxx
FT232RL-xxxx
Note: Packing codes for xxxx is:
Package
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
1.3 USB Compliant
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
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
2 FT232R Block Diagram
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
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
x4 ClockMultiplierUARTFIFO ControllerSerial InterfaceEngine( SIE )USBProtocol EngineBaud RateGeneratorUART ControllerwithProgrammableSignal Inversion3.3 VoltLDORegulatorUSBTransceiverwithIntegratedSeriesResistorsand 1.5KPull-upUSB DPLLInternal12MHzOscillator48MHz48MHzOCSI(optional)OSCO(optional)USBDPUSBDM3V3OUTVCCDBUS0DBUS1DBUS2DBUS3DBUS4DBUS5DBUS6DBUS7CBUS0CBUS2CBUS3SLEEP#RESET#TESTGNDResetGenerator3V3OUTCBUS1FIFO RX BufferFIFO TX BufferInternalEEPROMTo USB Transeiver CellCBUS4
Table of Contents
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
1 Typical Applications ........................................................................ 2
1.1 Driver Support .................................................................................... 2
1.2 Part Numbers...................................................................................... 2
Note: Packing codes for xxxx is: .................................................................. 2
1.3 USB Compliant .................................................................................... 3
2 FT232R Block Diagram .................................................................... 4
3 Device Pin Out and Signal Description ............................................ 7
3.1 28-LD SSOP Package .......................................................................... 7
3.2 SSOP Package Pin Out Description ...................................................... 7
3.3 QFN-32 Package ............................................................................... 10
3.4 QFN-32 Package Signal Description .................................................. 10
3.5 CBUS Signal Options ......................................................................... 13
4 Function Description ..................................................................... 14
4.1 Key Features ..................................................................................... 14
4.2 Functional Block Descriptions ........................................................... 15
5 Devices Characteristics and Ratings .............................................. 17
5.1 Absolute Maximum Ratings............................................................... 17
5.2 DC Characteristics............................................................................. 18
5.3 EEPROM Reliability Characteristics ................................................... 21
5.4
Internal Clock Characteristics ........................................................... 21
6 USB Power Configurations ............................................................ 23
6.1 USB Bus Powered Configuration ...................................................... 23
6.2 Self Powered Configuration .............................................................. 24
6.3 USB Bus Powered with Power Switching Configuration .................... 25
6.4 USB Bus Powered with Selectable External Logic Supply .................. 26
7 Application Examples .................................................................... 27
7.1 USB to RS232 Converter ................................................................... 27
7.2 USB to RS485 Coverter ..................................................................... 28
7.3 USB to RS422 Converter ................................................................... 29
7.4 USB to MCU UART Interface .............................................................. 30
7.5 LED Interface .................................................................................... 31
7.6 Using the External Oscillator ............................................................ 32
8 Internal EEPROM Configuration .................................................... 33
9 Package Parameters ..................................................................... 35
9.1 SSOP-28 Package Dimensions .......................................................... 35
Copyright © 2010 Future Technology Devices International Limited
5
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
9.2 QFN-32 Package Dimensions ............................................................ 36
9.3 QFN-32 Package Typical Pad Layout ................................................. 37
9.4 QFN-32 Package Typical Solder Paste Diagram ................................. 37
9.5 Solder Reflow Profile ........................................................................ 38
10 Contact Information ................................................................... 39
Appendix A – References ........................................................................... 40
Appendix B - List of Figures and Tables ..................................................... 41
Appendix C - Revision History .................................................................... 43
Copyright © 2010 Future Technology Devices International Limited
6
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
3 Device Pin Out and Signal Description
3.1 28-LD SSOP Package
Figure 3.1 SSOP Package Pin Out and Schematic Symbol
3.2 SSOP Package Pin Out Description
Note: The convention used throughout this document for active low signals is the signal name followed by
a #
Pin No. Name
Type
Description
15
USBDP
I/O
USB Data Signal Plus, incorporating internal series resistor and 1.5kΩ pull up
resistor to 3.3V.
16
USBDM
I/O
USB Data Signal Minus, incorporating internal series resistor.
Table 3.1 USB Interface Group
Pin No. Name
Type
Description
4
VCCIO
PWR
+1.8V to +5.25V supply to the UART Interface and CBUS group pins (1...3, 5, 6,
9...14, 22, 23). In USB bus powered designs connect this pin to 3V3OUT pin to
drive out at +3.3V levels, or connect to VCC to drive out at 5V CMOS level. This
pin can also be supplied with an external +1.8V to +2.8V supply in order to drive
outputs at lower levels. It should be noted that in this case this supply should
originate from the same source as the supply to VCC. This means that in bus
powered designs a regulator which is supplied by the +5V on the USB bus should
be used.
7, 18,
21
GND
PWR
Device ground supply pins
Copyright © 2010 Future Technology Devices International Limited
7
USBDPUSBDM3V3OUTGNDRESET#VCCGNDNCAGNDTESTOSCIOSCOCBUS1CBUS0TXDRTS#RXDDTR#VCCIORI#GNDNCDSR#DCD#CTS#CBUS4CBUS2CBUS31141528FT232RLAGNDGNDGNDGNDTEST2571821263V3OUTVCCIO417NCRESET#NC24198TXDRXDRTS#CTS#DTR#DSR#DCD#RI#1531129106CBUS0CBUS3CBUS2CBUS123221314201615USBDPUSBDMVCCOSCI27OSCO28CBUS412FTDIFT232RLYYXX-AXXXXXXXXXXXX
Document No.: FT_000053
FT232R USB UART IC Datasheet Version 2.07
Clearance No.: FTDI# 38
Pin No. Name
Type
Description
17
3V3OUT Output
+3.3V output from integrated LDO regulator. This pin should be decoupled to
ground using a 100nF capacitor. The main use of this pin is to provide the internal
+3.3V supply to the USB transceiver cell and the internal 1.5kΩ pull up resistor on
USBDP. Up to 50mA can be drawn from this pin to power external logic if
required. This pin can also be used to supply the VCCIO pin.
20
25
VCC
PWR
+3.3V to +5.25V supply to the device core. (see Note 1)
AGND
PWR
Device analogue ground supply for internal clock multiplier
Table 3.2 Power and Ground Group
Pin No.
Name
Type
Description
8, 24
NC
NC
No internal connection
19
RESET#
Input
Active low reset pin. This can be used by an external device to reset the
FT232R. If not required can be left unconnected, or pulled up to VCC.
26
TEST
Input
Puts the device into IC test mode. Must be tied to GND for normal
operation, otherwise the device will appear to fail.
27
OSCI
Input
Input 12MHz Oscillator Cell. Optional – Can be left unconnected for
normal operation. (see Note 2)
28
OSCO
Output
Output from 12MHZ Oscillator Cell. Optional – Can be left unconnected
for normal operation if internal Oscillator is used. (see Note 2)
Table 3.3 Miscellaneous Signal Group
Pin No. Name
Type
Description
1
2
3
5
6
9
10
11
TXD
Output
Transmit Asynchronous Data Output.
DTR#
Output Data Terminal Ready Control Output / Handshake Signal.
RTS#
Output Request to Send Control Output / Handshake Signal.
RXD
Input
Receiving Asynchronous Data Input.
RI#
Input
Ring Indicator Control Input. When remote wake up is enabled in the
internal EEPROM taking RI# low (20ms active low pulse) can be used to
resume the PC USB host controller from suspend.
DSR#
Input
Data Set Ready Control Input / Handshake Signal.
DCD#
Input
Data Carrier Detect Control Input.
CTS#
Input
Clear To Send Control Input / Handshake Signal.
12
CBUS4
I/O
Configurable CBUS output only Pin. Function of this pin is configured in
the device internal EEPROM. Factory default configuration is SLEEP#. See
CBUS Signal Options, Table 3.9.
13
CBUS2
I/O
Configurable CBUS I/O Pin. Function of this pin is configured in the
device internal EEPROM. Factory default configuration is TXDEN. See
CBUS Signal Options, Table 3.9.
Copyright © 2010 Future Technology Devices International Limited
8
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