NXP Semiconductors OM13321, PCA9956B User Manual
UM10709
PCA9956B demonstration board OM13321
Rev. 2 — 11 August 2017 User manual
Document information
Info Content
Keywords Fm+ I2C-bus, PCA9956B, RGB and White LEDs, 24-ch annel x 8-bit
PWMs
Abstract The OM13321 is an add-on to 9-pin connector of the NXP I2C demo board
2005-1 or Fm+ I2C Bus development board. This daughter board makes it
easy to test and design with the PCA9956B, a 24-channel Fast-mode Plus
(Fm+) 57 mA constant current and outputs allow up to 20 V for LED
supply. This demo board, along with the Win-I2CUSB Lite GUI
(PC based), provides an easy to use evaluation platform.
UM10709 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
User manual Rev. 2 — 11 August 2017 2 of 18
Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
NXP Semiconductors
UM10709
PCA9956B demonstration board OM13321
Revision history
Rev Date Description
2.0 20170811 Changed PCA9956A to PCA9956B throughout; updated Figure 3
, Figure 4, Figure 5
1.0 20131216 User manual; initial release.
UM10709 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
User manual Rev. 2 — 11 August 2017 3 of 18
NXP Semiconductors
UM10709
PCA9956B demonstration board OM13321
1. Introduction
The PCA9956B evaluation board features LEDs for color mixing, blinking and dimming
demonstrations. A graphical interface allows the user to easily explore the different
functions of the driver. 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 PCA9956B 24-channel Fm+ I
2
C-bus constant
current LED driver
• Easy to use GUI-based software demonstrates the capabilities of the PCA9956B
• On-board eight 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 I2C-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
http://www.demoboard.com
)
3.4 Power requirements
The NXP demonstration board I2C 2005-1 and OM13321 hardware obt ain 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.
UM10709 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
User manual Rev. 2 — 11 August 2017 4 of 18
NXP Semiconductors
UM10709
PCA9956B demonstration board OM13321
4. Installation
4.1 I2C demo board 2005-1 and WIN-I2CUSB Lite software
The OM13321 is a daughter card to the OM6275 I2C demo board 2005-1. You may
download the WIN-I2CUSB Lite Software, the OM6275 user manual UM10206, and find
ordering information at the NXP web site http://www.nxp.com/demoboard/OM6275.html
.
The Win-I2CUSB Lite software from The Boardshop runs on Windows 98SE, ME, 2000,
and XP and is compatible with any PC hardware having a minimum of a Pentium
processor and an USB port. The software allows the user to select one of the I
2
C-bus
devices on the board from a menu and also pr ovides a Universal mode (I
2
C Expert mode)
to allow users to create their own I
2
C-bus commands with the same I2C-bus devices.
4.2 OM13321 connection to I2C demo board 2005-1
The I2C demo board 2005-1 should be disconnected from your PC before mounting the
OM13321 board on to it. The OM13321 board has a 9-pin female connector (CON2) that
connects to the JP1 male connector on the I2C demo board 2005-1 as shown in Figure 1
.
With both boards facing you, and with USB connector on the right-hand side as shown in
Figure 1
, connect the OM13321 board to the I2C demo board 2005-1 before co nnecting
the USB cable. Once the board is connected, connect the USB cable and start the
WIN-I2CUSB Lite software. You are now ready to evaluate the PCA9956B.
Fig 1. PCA9956B demo board (OM13321) mounting to the I2C demo board 2005-1 (OM6275)
UM10709 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
User manual Rev. 2 — 11 August 2017 5 of 18
NXP Semiconductors
UM10709
PCA9956B demonstration board OM13321
4.3 OM13321 connection to WIN-I2CUSB hardware adapter board
The Win-I2CUSB board should be disconnected from your PC before connecting the
OM13321 board on to it. The OM13321 board has a 14-pin male connector (CON4) that
connects to the 14-pin male connector (J1) on the Win-I2CUSB board as shown in
Figure 2
.
Connect the OM13321 board to the Win-I2CUSB board before connecting the USB cable.
Once the board is connected, connect the USB cable and start the WIN-I2CUSB Lite
software. You are now ready to evaluate the PCA9956B.
Fig 2. PCA9956B demo board (OM13321) connecting to the WIN-I2CUSB board
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User manual Rev. 2 — 11 August 2017 6 of 18
NXP Semiconductors
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PCA9956B demonstration board OM13321
5. Hardware description
Figure 3 shows the following items on the hardware:
• CON1 (9-pin male connector) is used to daisy-chain to next I
2
C-bus slave device or
demo board.
• CON2 (9-pin female connector) is connected to JP1 on I2C demo board 2005-1 as
master device to drive this demo board.
• CON3 (5-pin male connector) is connected to the PCU9669 or PCA9665 mini board
as I
2
C-bus master device to drive this demo board.
• CON4 (14-pin male connector) is connected to J1 on WIN-I2CUSB hardware board
as I
2
C-bus master device to drive this demo board.
• J1 selects V
DD
power for PCA9956B, connected 1-2 for VDD= 5 V and connected 2-3
for V
DD
=3.3V.
• J5, J8 and J9 to select one of the five (GND, Pull-down, Floating, Pull-up and V
DD
)
input levels to address inputs AD[0:2] for a maximum of 125 possible programmable
I
2
C-bus slave address.
• LED[0:23] 24-channel output to drive eight RGB LEDs (RGB_LED[1:8]).
• TP2 and TP3 are GND pins for probing use.
Fig 3. PCA9956B demo board (OM13321)
CON1 9-pin
connector to
2
nd
PCx9956A
demo board
CON2 9-pin
connector to
I2C 2005-1
board
RGB
LED[0:2]
RGB
LED[3:5]
RGB
LED[6:8]
RGB
LED[9:11]
RGB
LED[12:14]
RGB
LED[15:17]
RGB
LED[18:20]
RGB
LED[21:23]
Quinary input pads
select for AD[2:0]
J5: AD0; J8: AD1; J9: AD2
J1 select V
DD
1-2 (+5V)
2-3 (+3.3V)
CON3 5-pin
connector to
Mini board
PCU9669
J28 select LED power
ON: internal +3.3V
OFF: external up to +20V
J11 external
Input power
up to +20V for LEDs
PCA9956B
6 white LEDs
for LED0 (ch0)
test up to 20V
All 6 jumpers
ON: LED0 is for +3.3V
OFF: LED0 is for +20V
TP4 /OE
Input point
TP1 RESET
Input point
J2 select Rext
1-2: 1K
3-4: 1.5K
5-6: 2 K
CON4 14-pin
connector to
Win-I2CUSB
board
B
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