NXP Semiconductors OM13321 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-channel 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.

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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: [email protected]
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.

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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 I2C demo-boards
to create an evaluation system.
The IC communicates to the host via the industry standard I2C-bus/SMBus port. The
evaluation software runs under Microsoft Windows PC platform.
2. Features
•A complete evaluation platform for the PCA9956B 24-channel Fm+ I2C-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 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.

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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 I2C-bus
devices on the board from a menu and also provides a Universal mode (I2C Expert mode)
to allow users to create their own I2C-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 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 1. PCA9956B demo board (OM13321) mounting to the I2C demo board 2005-1 (OM6275)

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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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NXP Semiconductors UM10709
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 I2C-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 I2C-bus master device to drive this demo board.
•CON4 (14-pin male connector) is connected to J1 on WIN-I2CUSB hardware board
as I2C-bus master device to drive this demo board.
•J1 selects VDD power for PCA9956B, connected 1-2 for VDD = 5 V and connected 2-3
for VDD =3.3V.
•J5, J8 and J9 to select one of the five (GND, Pull-down, Floating, Pull-up and VDD)
input levels to address inputs AD[0:2] for a maximum of 125 possible programmable
I2C-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
2nd 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 VDD
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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PCA9956B demonstration board OM13321
•TP1 can be connected as external reset signal to RESET pin when J7 is open.
•TP4 can be connected as external output enable signal to OE pin for blinking/dimming
control when J10 is open.
•All jumpers default setting and function as shown in Table 1.
Table 1. Jumper settings for test and evaluation
Jumper Default setting Comment
J1
(3-pin) 1-2 (VDD = +5 V) This jumper is used to select VDD for PCA9956B.
1-2: select +5 V
2-3: select +3.3 V
J2
(3 2-pin) 1-2 (REXT = 1 k, 57.3 mA
at max.)
This 3 2 jumper is used to select REXT (pin 1) value for PCA9956B.
1-2: select REXT = 1 kand maximum output current is 57.3 mA
3-4: select REXT = 1.5 kand maximum output current is 38.25 mA
5-6: select REXT = 2 kand maximum output current is 28.6 mA
J3
(2-pin) 1-2 (short) Short: external 1.1 kpull-up resistor for SDA on PCA9956B.
Open: no external pull-up resistor for SDA on PCA9956B.
J4
(2-pin) 1-2 (short) Short: external 1.1 kpull-up resistor for SCL on PCA9956B.
Open: no external pull-up resistor for SCL on PCA9956B.
J5
(4 2-pin) 1-2[1]
(VDD)This 4 2 jumper is used to select quinary input value for AD0 (pin 2).
Open: floating.
1-2: select VDD.
3-4: select pull-up with 31.6 k
5-6: select pull-down with 34.8 k
7-8: select GND
J6
(2-pin) 1-2 (short) Short: connect VDD to pin 38 (power supply) of the PCA9956B.
Open: connect current meter to measure the IDD on PCA9956B.
J7
(2-pin) 1-2 (open) Short: force RESET (pin 35) to GND to reset device.
Open: 10 kpull-up the RESET (pin 35) to VDD and the TP1 can be used as
external reset input signal.
J8
(4 2-pin) 1-2[1]
(VDD)This 4 2 jumper is used to select quinary input value for AD1 (pin 3).
Open: floating.
1-2: select VDD.
3-4: select pull-up with 31.6 k
5-6: select pull-down with 34.8 k
7-8: select GND
J9
(4 2-pin) 1-2[1] (VDD)This 4 2 jumper is used to select quinary input value for AD2 (pin 4).
Open: floating.
1-2: select VDD.
3-4: select pull-up with 31.6 k
5-6: select pull-down with 34.8 k
7-8: select GND
J10
(2-pin) 1-2 (short) Short: force OE (pin 5) to GND, to enable LEDs output.
Open: 10 kpull-up OE (pin 5) to VDD when apply external clock for blinking
and dimming control on TP4 (test point).

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PCA9956B demonstration board OM13321
J11
(2-pin) External supply voltage input to LED0 or all
LEDs
External supply voltage (+20 V) input to LED for test only.
The external supply voltage (+20 V) connects to LED0 only when J19 is open.
The external supply voltage (3.3 V) connects to all LEDs when the J19 is short
and J28 is open.
J21
(2-pin) GND input External supply voltage ground input to LED.
J12, J13, J14,
J15, J16, J17
(2-pin)
1-2
(short) These jumpers are used to connect or disconnect white LEDs (WHT_LED[1:6]) on LED0 output for test only.
Open: connected the white LED on LED0 output
Short: bypass the white LED on LED0 output
J18, J24, J26
(2-pin) 1-2 (open) These jumpers are used to test short-circuit for RGB_LED1.
J18 is used to set short error for Red LED (LED0).
J24 is used to set short error for Green LED (LED1).
J26 is used to set short error for Blue LED (LED2).
Open: normal operation for the RGB_LED1.
Short: short one of the RGB_LED1 to test an LED short-error condition in
EFLAG register.
J19
(2-pin) Short This jumper is used to select LED0 supply voltage.
Open: select external +20 V input from J11 (to LED0 only).
Short: select either internal +3.3 V when J28 is short or external +20 V
when J28 is open (to all LEDs).
J20, J23, J27
(2-pin) Short These jumpers are used to test open-circuit for RGB_LED1.
J20 is used to set open error for Red LED (LED0).
J23 is used to set open error for Green LED (LED1).
J27 is used to set open error for Blue LED (LED2).
Open: User can connect current meter to measure one of the LED[0:2]
output current or open one of the RGB_LED1 for detecting an LED open-error
condition in EFLAG register.
Short: normal operation for the RGB_LED1.
J22, J25
(2-pin) Open These jumpers are used to merge the LED[0:2] outputs together for driving higher LED current for test only.
Open: normal operation for the RGB_LED1.
Short: When short J22/J25 and open J23/J27 to combine LED[0:2] outputs to
drive LED0. When short J22 only and open J23 to combine LED[0:1] outputs
to drive LED0.
J28
(2-pin) Short This jumper is used to select LEDs supply voltage.
Open: select external +20 V input from J11 when J19 is short (for all LEDs).
Short: select internal +3.3 V for LED[1:23] supply voltage when the J19 is
open or for all LED[0:23] supply voltage when the J19 is short (J11 is
no input).
Table 1. Jumper settings for test and evaluation …continued
Jumper Default setting Comment

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PCA9956B demonstration board OM13321
[1] Default PCA9956B slave address is 0xFAh (AD[2:0] = VDD).
J29, J31, J33
(2-pin) Short These jumpers are used to test open-circuit for RGB_LED8.
J29 is used to set open error for Red LED (LED21).
J31 is used to set open error for Green LED (LED22).
J33 is used to set open error for Blue LED (LED23).
Open: user can connect current meter to measure one of the LED[21:23]
output current or open one of the RGB_LED8 for detecting an LED open-error
condition in EFLAG register.
Short: normal operation for the RGB_LED8.
J30, J32, J34
(2-pin) Open These jumpers are used to test short-circuit for RGB_LED8.
J30 is used to set short error for Red LED (LED21).
J32 is used to set short error for Green LED (LED22).
J34 is used to set short error for Blue LED (LED23).
Open: normal operation for the RGB_LED8.
Short: short one of the RGB_LED8 to test an LED short-error condition in
EFLAG register.
TP1 Test Point 1 This TP1 is used to drive RESET input pin 35 from external when J7 is open.
TP2, TP3 Test Point 2/3 These two test points are GND for probe ground connection.
TP4 Test Point 4 This TP4 is used to drive OE input pin 5 from external when J10 is open.
Table 1. Jumper settings for test and evaluation …continued
Jumper Default setting Comment

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PCA9956B demonstration board OM13321
6. Schematic
Fig 4. PCA9956B demo board schematic (part A)
aaa-009891
PCA9956B (OM13321)
24-ch 57mA/20V CC LED driver Test/Demo Board
(Io_LED_MAX=28.6mA)
(Io_LED_MAX=38.25mA)
(Io_LED_MAX=57.3mA)
Quinary input pad connection to AD[2:0]
Open -> floating
1-2 -> VDD
3-4 -> Pull-up
5-6 -> Pull-down
7-8 -> GND Ext /OE input
1-2 -> Output enabled
Open -> Output disabled
Ext /RST input
9-pin female connector
to/from I2C 2005-1 board
9-pin male connector to/from
2nd PCA9956B demo board
(470ohm@100MHz)
14-pin header connector to/from
Win-I2CUSB I2C master to drive
PCA9956B demo board
GNDGND
LED max. output current setting:
1-2 -> Rext=1K, 57.3mA
3-4 -> Rext=1.5K, 38.25mA
5-6 -> Rext=2K, 28.6mA
AD0
AD1
AD2
closed to Vdd pin
5-pin male connector to/from
bus controller PCA9665 or
PCU9669 mini board
1-2 -> force reset
Open -> noraml
Note:
OM13399 can use to connect this 9-pin female connector
(CON2) and convert to 14-pin for new I2C development board
Thermal pad 4.8 x 3 mm
add thermal vias 5 x 3
0.28 mm diameter with 1 mm pitch
with the barrel plated to about 1.0 ounce copper
(Green LED for
Vdd indicator)
SCL
SDA
VDD_IN
GND
+3.3V +5V
SDA-Filter
SCL-Filter
VDD_IN
LED0
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
LED9
LED10
LED11 LED12
LED13
LED14
LED15
LED16
LED17
LED18
LED19
LED20
LED21
LED22
LED23
AD0
VDD_IN /OE
SCL-Filter
/RESET
AD2
AD1
+5V
+3.3V
SCL
GND
SDA
/RESET
+5V
+3.3V
SCL-Filter
SDA-Filter
/RESET
GND
VDD_IN
VDD_IN
SCL
SDA
+5V
+3.3V
GND
GND
LED[0:23]
SCL-Filter
SDA-Filter
+24V
+5V
SDA-Filter
SCL-Filter
GND
LED[0:23]
+3.3V
R10 0 ohm
R1 1k
TP2
1
L1
BLM18BD471SN1
J4
1 2
L2
BLM18BD471SN1
R3
10K
TP1
1
U1 PCA9956B
REXT
1
AD0
2
AD1
3
AD2
4
OE
5
LED0
6
LED1
7
LED2
8
LED3
9
LED4
10
LED5
11
LED6
12
LED7
13
Vss
14
LED8
15
LED9
16
LED10
17
Vss
18
LED11
19 LED12 20
Vss 21
LED13 22
LED14 23
LED15 24
Vss 25
LED17 27
LED18 28
LED20 30
LED21 31
LED22 32
LED23 33
LED16 26
LED19 29
Vss 34
RESET 35
SCL/USCL 36
SDA/USDA 37
Vdd 38
R9
1k
J2
JUMPER3x2
12
34
5 6
R5
1.1K
L3 HI1206N101R-10 CON2
9-pin Female
1
2
3
4
5
6
7
8
9
R22
10K
CON1
9-pin Male
1
2
3
4
5
6
7
8
9
R18 0 ohm
CON3
5-pin Male
1
2
3
4
5
D1
LTST-C170GKT
R19 31.6K
J6
12
R14 0 ohm
R20 34.8K
CON4
HEADER 7x2/SM
12
3 4
5 6
7 8
910
11 12
13 14
AVR-M1608C080M1
VARISTOR
C6
10 uF
C2
10 uF
R12 34.8K
R15 31.6K
R21 0 ohm
R8 0 ohm
C7
0.01uF
R16 34.8K
J9
JUMPER4x2
1 2
3 4
5 6
7 8
R17 0 ohm
R2 1.5k
TP3
1
R6 2K
J8
JUMPER4x2
1 2
3 4
5 6
7 8
U2
PRTR5V0U2AX
GND
1
I/O1
2I/O2 3
VCC 4
C3
0.1uF
R4
1.1K
J3
1 2
J5
JUMPER4x2
12
3 4
5 6
7 8
J10
12
C5
10 uF
C1
10 uF
J1
1 2 3
C4
4.7 uF
R13 0 ohm
J7
1
2
R11 31.6K
TP4
1
R7 0 ohm