Data Sheet

4D SYSTEMS uUSB-PA5
© 2015 4D SYSTEMS Page 3 of 7 www.4dsystems.com.au
microUSB - μUSB-PA5
1. Description
The microUSB Programming Adaptor is a USB to
TTL UART bridge converter which is simple, cost
effective, very small and easy to use.
There are 2 versions of the microUSB
Programming Adaptor, the uUSB-PA5 and the
uUSB-PA5-II.
They both use a mini-B type USB connector to
connect to your PC. The uUSB-PA5 is based on the
FTDI FT232RQ USB to Serial Bridge IC from FTDI
Chip, while the uUSB-PA5-II is based on the SiLabs
CP2104 USB to Serial Bridge IC from Silicon Labs.
From the perspective of programming 4D Systems
modules, both the uUSB-PA5 and uUSB-PA5-II
operate in the same way.
They provide the User with multi baud rate serial
data and access to additional signals such as flow
control in a convenient 10 pin 2.54mm (0.1”) pitch
Dual-In-Line package.
The main 5 pin interface is a standard 2.54mm
(0.1”) pitch female header, designed to connect
directly to a majority of the 4D Systems modules.
The uUSB-PA5 and uUSB-PA5-II are ideal for
prototype or production.
RX and TX signals are both 3.3V and 5V tolerant.
2. Module Compatibility
The uUSB-PA5 was designed in 2012. The uUSB-
PA5-II was designed in 2015 to replace the uUSB-
PA5.
While a large range of 4D Systems modules are
compatible with these programming adaptors,
some are not, for mechanical reasons.
The following is a small list is of known modules
that are not compatible with the uUSB-PA5/PA5-II.
 uLCD-28PT (note, this is not the PTU)
 uLCD-32PT (note, this is not the PTU)
Please use the 4D Programming cable instead, or
simply connect the 5 way cable that ships with
each module, between the uUSB-PA5/PA5-II and
the display module, which overcomes this
compatibility issue.
3. Features
 USB 2.0 compliant Full Speed 12Mbps
maximum speed, Suspend supported.
 Hardware or Xon/Xoff handshaking supported,
300bps to 3Mbps (uUSB-PA5), 300bps to 2Mbps
(uUSB-PA5-II)
 UART supports 7 or 8 data bits, 1-2 Stop bits,
odd/even/mark/space and no parity (uUSB-PA5).
5, 6, 7, 8 data bits, 1, 1.5, 2 stop bits,
odd/even/mark/space and no parity (uUSB-PA5-II)
 Power on reset circuit
 Virtual COM port drivers allow operation with
existing COM port PC applications
 Supports Windows 2000 and above, MAC (OSX-
8 and above) and Linux (2.4 kernel and above)
 USB powered
 -40 to +85 degrees Celsius temp range
 Small size, 33.7mm x 17.3mm
 Traffic/Operation LED indicates board status
 Additional flow control and features available
for the user to solder, using standard 2.54mm
(0.1”) pitch through holes along each side of the
PCB.
 RoHS Compliant