Datasheet

© Copyright 2005-2011 Future Technology Devices International Ltd
4
Document Reference No.: FT_000051
UM232R USB - Serial UART Development Module
Datasheet Version 1.1
Clearance No.: FTDI# 125
2.2 Features
The UM232R has the following features:
Single chip USB to UART synchronous 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.
USB FTDIChip-ID™ feature.
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.
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.
Support for USB suspend and resume.
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.
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.
+4.0V 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.