USB-SER
TM
USB to UART Converter User Manual
GRAVITECH.US
uResearch
GRAVITECH GROUP
Copyright © 2006 MicroResearch
GRAVITECH GROUP
WWW.GRAVITECH.US
USB-SER
TM
USB to UART Converter User Manual
Description
This USB-SER board is a USB to Serial
UART (TTL level) converter module. It is
allow you to connect your computer
through USB port and use it as a regular
serial communication. All USB protocol
is handled within the module. There is
no other device or programming
required.
This board features innovations that set
it 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. Also, 6MHz clock
output signal options for driving external
MCU or FPGA. The TX and RX pins
from the USB-SER can be connected
directly to RX and TX pins of your
preferred microcontroller or serial
application for a simple serial cable
replacement connection.
The USB-SER board is perfect for
embedded systems that require a serial
connection to a computer. The board
attaches 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 UART to your target board.
Drivers are available for Windows 98,
98SE, ME, 2000, Server 2003, XP,
Vista/Longhorn, XP Embedded and
CE.NET 4.2 & 5.0. Mac OS8/9, OS-X
and Linux 2.4 and greater are supported.
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Features
Small 1.25 x 1.00 inches board.
Single
board
USB
to
asynchronous serial data transfer
interface.
Decoupling supply voltage.
Design easy for breadboard.
UART 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.
6MHz clock output signal for
driving external MCU or FPGA.
Support for USB suspend and
resume.
Integrated 3.3V level 50mA
output.
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 © 2006 MicroResearch
GRAVITECH GROUP
WWW.GRAVITECH.US
USB-SER
TM
USB to UART Converter User Manual
•
Interfaces
UART:
All serial interface pins are 5V logic level
GND:
is a common ground for
every pin. This pin must be
connected to ground when using
external power supply on the
target board.
FQ:
is a 6MHz clock output
signal. You may use this pin to
drive external MCU or FPGA.
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TX:
Transmit
from
the USB-SER
board. It is a Serial Output and
normally connected to the RX pin
on
any
microcontroller
or
equivalent UART.
RX:
Receive
into
the USB-SER
board. It is a Serial Input and
normally connected to the TX pin
on
any
microcontroller
or
equivalent UART.
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Power:
The
USB-SER
board
has
two
connections to power: 5V (unregulated)
and 3.3V
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+5V:
is connected to USB 5V bus
via a filter ferrite bead. It can
range from 4.0 – 5.0 V depending
on the regulation of the given
USB port. In USB 2.0 system, this
pin can provide a maximum of
500mA in accordance with the
USB 2.0 specification.
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 zip file for your
operating system to disk. Remember the
directory (path and folder). After the file
has been downloads, upzip the
folder/files to a suitable directly.
Note:
The
driver
installation
procedure for Window XP is
described below. The installation
procedure
for
other
operating
systems should be similar.
WARNING!
DO
NOT
APPLY
EXTERNAL POWER TO THIS PIN. IT
IS AN OUTPUT NOT INPUT PIN.
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3.3:
is connected to the internal
regulator and can source a
maximum of 50mA. You may use
this pin to power your 3.3V circuit.
Copyright © 2006 MicroResearch
GRAVITECH GROUP
WWW.GRAVITECH.US
USB-SER
TM
USB to UART Converter User Manual
Attach the USB device to your system.
The
Found New Hardware Wizard
should pop up:
the combo-box (“C:\CDM 2.00.00 in the
example below) or browse to it by
clicking the browser button. Once the file
path has been entered in the box, click
next to proceed.
Select “No, not this time” from the
options available and then click “Next” to
proceed with the installation.
Select “Install from a list or specific
location (Advanced)” as show below and
then click “Next”.
If Windows XP is configured to warn
when unsigned (non-WHQL-certified)
driver are about to be installed, the
following screen will be displayed. Click
on “Continue Anyway” to continue with
the installation. If Window XP is
configured to ignore file signature
warnings, no message will appear.
Select “Search for the best driver in
these locations” and enter the file path in
Copyright © 2006 MicroResearch
GRAVITECH GROUP
WWW.GRAVITECH.US
USB-SER
TM
USB to UART Converter User Manual
The following screen will be display as
Windows XP copies the required drive
files.
Select “Install from a list or specific
location (Advanced)” as show below and
then click “Next”.
Windows should then display a message
indicating that the installation was
successful. Click “Finish” to complete the
installation for the first port of the device.
Another
Found New Hardware Wizard
may open for the USB Serial Port. If the
wizard open up, use the following
procedures to complete the installation.
Select “No, not this time” from the
options available and then click “Next” to
proceed with the installation.
Select “Search for the best driver in
these locations” and enter the file path in
the combo-box (“C:\CDM 2.00.00 in the
example below) or browse to it by
clicking the browser button. Once the file
path has been entered in the box, click
next to proceed.
Copyright © 2006 MicroResearch
GRAVITECH GROUP
WWW.GRAVITECH.US
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