NXP Semiconductors PCA9955A, Руководство пользователя, Страница: 3 / 25

UM10729 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors B.V. 2017. All rights reserved.
User manual Rev. 2 — 1 August 2017 3 of 24
NXP Semiconductors
UM10729
PCA9955A/B demonstration board OM13483
1. Introduction
The PCA9955A/B evaluation board features LEDs for color mixing, blinking and dimming
demonstrations. A graphical interface allows the user to explore the different functions of
the driver easily. The board can be connected in series with other I
2
C demo-boards to
create an evaluation system.
The IC communicates to the host via the industry standard I
2
C-bus/SMBus port. The
evaluation software runs under Microsoft Windows PC platform.
2. Features
•
A complete evaluation platform for the PCA9955A/B 16-channel Fm+ I
2
C-bus
constant current LED driver
•
Easy to use GUI-based software demonstrates the capabilities of the PCA9955A/B
•
On-board four white and four RGB LEDs for visual experience
•
Convenient test points for easy scope measurements and signal access
•
USB interface to the host PC
•
No external power supply required
3. Getting started
3.1 Assumptions
Familiarity with the I
2
C-bus is helpful, but not required.
3.2 Static handling requirements
3.3 Minimum system requirements
•
PC Pentium 60 processor (or equivalent), 8 MB RAM, 10 MB of hard drive space
•
One USB port (either 2.0 or 1.1 compatible)
•
Windows 98SE, ME, 2000, XP, or Vista
•
I2C demonstration board 2005-1 (OM6275) or Win-I2CUSB board (from
www.demoboard.com )
3.4 Power requirements
The NXP demonstration board I2C 2005-1 and OM13483 hardware obtain power from the
PC USB port. Care should be taken not to exceed the USB port current capabilities.
CAUTION
This device is sensitive to ElectroStatic Discharge (ESD). Therefore care should be taken
during transport and handling. You must use a ground strap or touch the PC case or other
grounded source before unpacking or handling the hardware.