USB-SER-NANO-5 and USB-SER-NANO-3.3
USB to RS-232 Converter User Manual
GRAVITECH.US
uResearch
GRAVITECH GROUP
Copyright © 2008 MicroResearch
GRAVITECH GROUP
WWW.GRAVITECH.US
USB-SER-NANO-5 and USB-SER-NANO-3.3
USB to RS-232 Converter User Manual
Description
These USB-SER-NANO boards are the
USB to Serial RS-232 (5VTTL or 3.3V
level) converter module. They allow you
to connect your computer through USB
port and use them as the regular serial
communication. All USB protocol is
handled within the module. There is no
other device or programming required.
These board features innovations that
set them apart from other USB to Serial
Converter boards. Innovations feature
like 256 byte receive buffer and 128 byte
transmit buffer utilize new buffer
smoothing technology to allow for high
data throughput. The voltage levels at
TX and RX pins are 0 and 3.3V for USB-
SER-NANO-3.3 and 0 and 5V for USB-
SER-NANO-5. That mean the TX and
RX pins from the USB-SER-NANO can
be connected directly to RX and TX pins
of your preferred microcontroller or any
serial RS-232 application.
The USB-SER-NANO boards are perfect
for embedded systems that require a
serial connection to a computer. The
boards attach directly to the USB bus via
a standard type mini B receptacle
connector. It shows up on any Windows
computer as a standard serial COM port.
Any applications that talk to this COM
port is automatically convert to USB and
back to RS-232 to your target board.
Drivers are available for Windows 98,
98SE, ME, 2000, Server 2003, XP,
Vista, XP Embedded and CE.NET 4.2 &
5.0. Mac OS8/9, OS-X and Linux 2.4
and greater are supported.
•
Features
Two versions:
o
USB-SER-NANO-5 – for
logic 5V circuit
o
USB-SER-NANO-3.3 – for
logic 3.3V circuit
Super small 1.05 x 0.50 inches
board.
Single
board
USB
to
asynchronous serial data transfer
RS-232 interface.
Decoupling supply voltage.
Design easy for breadboard.
RS-232 interface support for 7 or
8 data bits, 1 or 2 stop bits and
odd/ even/ mark/ space/ no parity.
Data transfer rates from 300 baud
to 1 Mega baud.
256 byte receive buffer and 128
byte transmit buffer utilizing buffer
smoothing technology to allow for
high data throughput.
Transmit and receive LEDs.
Support for USB suspend and
resume.
Low USB bandwidth consumption
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Applications
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USB communication with your
favorite microcontroller or project
board.
Data collection from external
measurement instrument.
Cell phone, PDA, MP3 player and
laptop USB data transfer.
USB to RS232 converters.
And much more…
Copyright © 2008 MicroResearch
GRAVITECH GROUP
WWW.GRAVITECH.US
USB-SER-NANO-5 and USB-SER-NANO-3.3
USB to RS-232 Converter User Manual
Interfaces
RS-232:
All serial interface pins are 5V logic level for
USB-SER-NANO-5 and 3.3V logic level for USB-
SER-NANO-3.3
USB Driver Installation
Download:
Go
to
the
FTDI
website
www.ftdichip.com
and click on the
“Drivers” tab. Choose VCP (Virtual COM
Port) drivers.
Save the appropriate .exe or .zip file for
your operating system to disk.
Remember the directory (path and
folder). After the file has been
downloads, double click on the .exe file
and the installation process start
automatically. Once the installation is
completed, you are ready to plug USB-
SER-NANO to your computer.
For the .zip file, upzip the files to a
suitable directory then plug the USB-
SER-NANO to your computer. Continue
the driver installation process with the
driver files from the zip file.
•
TX
Transmit
from
the USB-SER-
NANO board. It is a Serial Output
and normally connected to the RX
pin on any microcontroller or
equivalent RS-232.
RX
Receive
into
the USB-SER-
NANO board. It is a Serial Input
and normally connected to the TX
pin on any microcontroller or
equivalent RS-232.
•
Power:
The USB-SER-NANO use power from
the USB port via mini B USB connector.
There is no external power supply
require.
•
GND:
is a common ground for
every pin. This pin must be
connected to ground of your
target board/application.
RES:
is connected to DTR# with
a 10K Ohm pulled-up resistor. For
some application, it can be use to
reset the microcontroller or target
board.
•
Copyright © 2008 MicroResearch
GRAVITECH GROUP
WWW.GRAVITECH.US
USB-SER-NANO-5 and USB-SER-NANO-3.3
USB to RS-232 Converter User Manual
Accessories
All of the accessories are available for
purchase via our website. If you don’t
see the item you need, please contract
our sales department at
sales@gravitech.us
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USB A-B
6Ft 4 pin male A type to 5 pin mini B
type. The cable is use to connect to
USB-SER board.
Specifications
Circuit Board Size
USB Supply (from PC)
1.05” x 0.50”
4 – 5 VDC
Copyright © 2008 MicroResearch
GRAVITECH GROUP
WWW.GRAVITECH.US
USB-SER-NANO-5 and USB-SER-NANO-3.3
USB to RS-232 Converter User Manual
Notes
Contact Us
We maintain a website where you can
get information on our products, obtain
literature and download support files.
Visit us online at:
For sales questions or to place and
order,
direct
your
e-mails
to
sales@gravitech.us.
Refer to our
website for product pricing, shipping
rates, payment instructions, and for
other info we need to complete your
order.
WWW.GRAVITECH.US
Use our online Forum or e-mail your
technical
support
questions
to
support@gravitech.us.
We
try
to
respond to your questions the same day.
Disclaimer: MicroResearch reserves the right to modify its products or literature,
or to discontinue any product at any time without prior notice. The customer is
responsible for determining the suitability of any device for any application
developed using MicroResearch components.
Copyright © 2008 MicroResearch
GRAVITECH GROUP
WWW.GRAVITECH.US
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