Description
The FT232R is a USB to serial UART interface device that integrates
an external EEPROM, USB termination resistors, and an integrated
clock circuit that does not require an external crystal within the
device, simplifying USB to serial designs and reducing external
component count. It has been developed to work efficiently with a
USB host controller by consuming as little of the total USB
bandwidth as possible.
Features
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 receives and transmits 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 highpower 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).
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 / Writers
• Set Top Box PC - USB interface
• USB Digital Camera Interface
• USB Hardware Modems
• USB Wireless Modems
• USB Bar Code Readers
• USB Software / Hardware Encryption Dongles
