NXP Semiconductors PCA9955 User Manual

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UM10572

PCA9955 demonstration board OM13330

Rev. 1 — 7 June 2012 User manual

Document information

Info Content Keywords Fm+ I2C-bus, PCA9955, RGB and white LEDs, 16-channel × 8-bit PWMs Abstract The OM13330 is an add-on to 9-pin connector of the NXP I2C demo board

2005-1 or Fm+ I easy to test and design with the PCA9955, a 16-channel Fast-mode Plus (Fm+) 57 mA constant current and outputs allow up to 40 V for LED supply. These boards, along with the Win-I2CUSB Lite GUI (PC based), provide an easy to use evaluation platform.

C-bus development board. This daughter board makes it

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NXP Semiconductors

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PCA9955 demonstration board OM13330

Revision history

Rev Date Description

v.1 20120607 user manual; initial release

Contact information

For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com

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1. Introduction

The PCA9955 evaluation board features LEDs for color mixing, blinking and dimming demonstrations. A graphical interface allows the easy exploration of the dif ferent functions of the driver . The board can be connected in series with other I create an evaluation system.

The IC communicates to the host via the industry standard I evaluation software runs under Microsoft Windows PC platform.

2. Features

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PCA9955 demonstration board OM13330

C-bus demo boards to

C-bus/SMBus port. The

• A complete evaluation platform for the PCA9955 16-channel Fm+ I

• Easy to use GUI-based software demonstrates the capabilities of the PCA9955

• On-board RGB and White 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

CAUTION

C-bus constant

current LED driver

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.

3.3 Minimum system requirements

PC Pentium 60 processor (or equivalent), 8 MB RAM, 10 MB of hard drive spa ce

•

• 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.nxp.com/redirect/demoboard.com

)

3.4 Power requirements

The NXP demonstration board I2C 2005-1 and OM13330 hardware obtain power from the PC USB port. Take care to not exceed the USB port current capabilities.

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4. Installation

4.1 I2C demo board 2005-1 and WIN-I2CUSB Lite software

The OM13330 is a daughter card to the OM6275 I2C demo board 2005-1. You can download the WIN-I2CUSB Lite Software, the OM6275 user manual UM10206, and find ordering information at the NXP web site ics.nxp.com/support/boards/i2c20051/

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 a USB port. The software allows the user to select one of the I devices on the board from a menu and also provides a Universal mode (I2C Expe rt mode) to allow users to create their own I

4.2 OM13330 connection to I2C demo board 2005-1

The I2C demo board 2005-1 should be disconnected from your PC before mounting the OM13330 board on to it. The OM13330 board has a 9-pin female connector (J4) that connects to the JP1 male connector on the I2C demo board 2005-1 as shown in Figure 1

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PCA9955 demonstration board OM13330

C-bus

C-bus commands with the same I2C-bus devices.

With both boards facing you, with USB connector on the right-hand side as shown in the

Figure 1

, connect the OM13330 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 PCA9955.

Fig 1. PCA9955 demo board (OM13330) mounting to the I2C demo board 2005-1 (OM6275)

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4.3 OM13330 connection to Win-I2CUSB hardware adapter board

The Win-I2CUSB board should be disconnected from your PC before connecting the OM13330 board on to it. The OM13330 board has a 14-pin male connector (J2) that connects to the 14-pin male connector (J1) on the Win-I2CUSB board as shown in

Figure 2

Connect the OM13330 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 PCA9955.

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PCA9955 demonstration board OM13330

Fig 2. PCA9955 demo board (OM13330) connecting to the Win-I2CUSB board

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5. Hardware description

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PCA9955 demonstration board OM13330

Fig 3. PCA9955 demo board (OM13330)

Figure 3 shows the following items on the hardware:

• J4 (9-pin) is for connection to JP1 on I2C demo board 2005-1.

• J3 and J5 (5-pin) are for connection to PCA9665/PCU9669 mini boards and cascade

the second PCA9955 demo board.

• J1 selects V

for V

= 5 V.

• SW1 4-position DIP switch to select I

(default is 0xC0, all switches are ON position).

power for PCA9955, connected 1-2 for VDD = 3.3 V and connected 2-3

C-bus address A[0:3] = SW1[1:4] for this device

• J2 (14-pin) is for connection to J1 on Win-I2CUSB board.

• 4-channel to drive four White LEDs (D2, D4, D6, D9) and 12-channel to drive

four RGB LEDs (D3, D5, D7, D8).

• J6, J7 and J8 are GND pins for probing use.

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019aac728

1 2 3 4 5

A0 A1

A3/OE

REXT

PCA9952TW, PCA9955TW, PCU9955TW

6 7 8 9

LED0 LED1

LED3

LED2

LED0 LED1

LED3

LED2

10 11 12

GND

LED5

LED4

LED5

LED4

13 14

LED6 LED7

28 27 26 25 24 GND

RESET

SDA/USDA

SCL/USCL

RESET

23 22 21 20

LED15 LED14

LED12

LED13

LED15 LED14

LED12

LED13

19 18 17

GND

LED10

LED11

LED10

LED11

1615LED9

LED8

LED9 LED8

R10 R11

0 Ω 0 Ω

2.8 kΩ

(ISET max = 20.4 mA)

SW1

SW DIP-4/SM

R1 10 kΩ

R2 10 kΩ

R3 10 kΩ

R4 10 kΩ

VDD_IN

(output enable for PCA9952)

TP1

R5 100 Ω

R6 100 Ω

R13 100 Ω

R14 100 Ω

SDA_USDA filter SCL_USCL filter

do not populate

10 kΩ

123

+3.3 V +5 V

VDD_IN

10 Ω

0.1 μF

4.7 μF

varistor 8 V

RV1

R12

1 kΩ

D1 LTST-C170KGKT

1 2 3

+24 V

SDA_USDA_1

+5 V

4 5

SCL_USCL_1 GND

C1 10 μF

CONN TRBLK-5

5-pin connector to/from PCU9669 UFm I2C master board to drive PCU9955 or to/from another I2C slave PCA/PCU9955 demo board

1 2 3

+5 V

+3.3 V

4 5

SCL_USCL_1

10 μF

CON9-female

6 7

SDA_USDA_1

GND

8 9RESET

C7 10 μF

9-pin connector to/from I2C 2005-1

demo board for PCA9952/PCA9955

3 2 1

GND

I/O1

I/O2

close to 5-pin connector J3

PRTR5V0U2AX

C25

0.01 μF

+5 V

L1 BLM18BD471SN1

SDA_USDA_1 SDA_USDA-filter

L2 BLM18BD471SN1

SCL_USCL_1 SCL_USCL-filter

(470 Ω at 100 MHz)

3 2 1

GND

I/O1

I/O2

close to 5-pin connector J5

PRTR5V0U2AX

C26

0.01 μF

+5 V

L3 BLM18BD471SN1

SDA_USDA_2 SDA_USDA-filter

L4 BLM18BD471SN1

SCL_USCL_2 SCL_USCL-filter

(470 Ω at 100 MHz)

0.1 nF

C10

0.1 nF

C11

0.1 nF

C12

0.1 nF

C13

0.1 nF

C14

0.1 nF

C15

0.1 nF

C16

0.1 nF

C17

0.1 nF

C18

0.1 nF

C19

0.1 nF

C20

0.1 nF

C21

0.1 nF

C22

0.1 nF

C23

0.1 nF

C24

0.1 nF

LED0

LW-E67C-white

+5 V

A1 C2 A2

C1 C3 A3

LED[1:3]

LRTB_G6SG

LED4

LW-E67C-white

R15 0 Ω

R16 0 Ω

R17 0 Ω

R18 0 Ω

LED0

LED1

LED2

LED3

R19 0 Ω

R20 0 Ω

R21 0 Ω

LED4

LED5

LED6

R22 0 Ω

R23 0 Ω

R24 0 Ω

LED7

LED8

LED9

R25 0 Ω

R26 0 Ω

R27 0 Ω

LED10

LED11

LED12

R28 0 Ω

R29 0 Ω

R30 0 Ω

LED13

LED14

LED15

A1 C2 A2

C1 C3 A3

LED[5:7]

LRTB_G6SG

LED8

LW-E67C-white

A1 C2 A2

C1 C3 A3

LED[9:11]

LRTB_G6SG

LED12

LW-E67C-white

A1 C2 A2

C1 C3 A3

LED[13:15]

LRTB_G6SG

3 2 1

GND

1 2 3

+24 V

SDA_USDA_2

+5 V

45SCL_USCL_2

GND

C8 10 μF

CONN TRBLK-5

5-pin connector to/from PCU9669 UFm I2C master board to drive PCU9955 or to/from another I2C slave PCA/PCU9955 demo board

1 3 5 7

9 11 13

2 4

SCL_USCL_2

(VP) VDO_IN

6 8 10

GND

SDA_USDA_2

12 14 +5 V

GND

+3.3 V

C4 10 μF

VP supplies the power to the I2C pull-up resistors on WIN-I2CUSB

C5 10 μF

14-pin connector to/from WIN-I2CUSB Fm+ I2C master to drive PCA9952/PCA9955

HEADER 7x2/SM

I2CUSB CONNECTOR

AVR-M1608C080M

xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x

6. Schematic

NXP Semiconductors

Fig 4. PCA9955 demo board schematic

PCA9955 demonstration board OM13330

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PCA9955 demonstration board OM13330

7. OM13330 demonstration board main components

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Table 1. OM13330 demo board main components

Device Description Address/LED output Location

PCA9955TW 16-channel Fm+ I2C-bus 57 mA

LW-E67C White LED LED0, LED4, LED8, LED12 D2, D4, D6, D9 LRTB_G6SG RGB LED LED1, LED2, LED3 D3 LRTB_G6SG RGB LED LED5, LED6, LED7 D5 LRTB_G6SG RGB LED LED9, LED10, LED11 D7 LRTB_G6SG RGB LED LED13, LED14, LED15 D8 LTST-C170KGKT Green LED for PCA9955 power supply

constant current LED driver

either 3.3 V or 5 V indicator

0xC0 for I2C demo board 2005-1 interface

-D1

8. PCA9955 evaluation steps

The PCA9955 functions are controlled by WIN-I2CUSB Lite GUI. Refer to the PCA9955 data sheet for additional information on the registers and functionality.

Connect the hardware as described in Section 4 set to 0xC0 on SW1 as A[0:3] = SW1[1:4] = 0000 (0 → ON, 1 → OFF). When you have correctly installed the software and the demonstration board hardware is connected and recognized by the computer, start the Win-I2CUSB Lite software. As shown in Figure 5 when the demonstration board hardware is correctly connected to the USB port and the computer recognizes it, the message ‘Hardware Detected’ is displayed on the bottom of the window.

. The PCA9955 demo board address is

Switched 3.3 V and 5.0 V power supplies are controlled through the ‘Options’ menu or by double-clicking the 3.3 V or 5.0 V symbols on the bottom of the window. Power supplies

are disabled by default, and must be enabled before using the I board. I

C-bus frequency is controlled through the ‘Option s’ menu or by double-clicking on

C-bus devices on the

the frequency symbol on the bottom of the window.

8.1 Color mixing and dimming LEDs

1. From the ‘Device’ drop-down menus, select ‘LED Blinkers and Dimmers’, and from the subsequent drop-down menu select ‘PCA9955 16-channel Constant Current LED Driver’ as shown in Figure 5

2. Check the ‘Auto Write On’ box (lower left), uncheck the ‘Low power mode (oscillator off)’ box to enable the device to ‘Normal mode’ (upper left).

3. The device configuration screen is displayed by clicking the following options:

– ‘PWM 0 to 7’ individual brightness control for LED0 to LED7 as shown in Figure 6 – ‘PWM 8 to 15’ individual brightness control for LED8 to LED15 as shown in

Figure 7

– ‘LEDOUT’ LED dr ive r ou tp ut state for LED0 to LED1 5 as sh ow n in Figure 8 – ‘Output Gain’ LED output current setting for LED0 to LED15 as shown in Figure 9

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4. Click the ‘LEDOUT’ configuration screen and select ‘PWMn & GRPPWM’ for LED[1:3]

5. Click the ‘Output Gain’ configuration screen and adjust the IREF[1:3] = 0x30 for

6. Click the ‘PWM 0 to 7’ configuration screen and move the PWM1 (red) PWM2 (green)

7. Once you set a color on D3 RGB LED with the PWM[1:3] values, click the ‘Other’

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PCA9955 demonstration board OM13330

– ‘Other’ GRPPWM is group PWM for global brightness control, GRPFREQ is group

frequency for global blinking control when group control = blinking in Mode 2 register, PWMALL is brightness control for all LED outputs, OFFSET is con trol LED output delay offset, IREFALL is control output current for all LEDs as shown in

Figure 10

(see Figure 8

LED[1:3] output current at 3.8 mA = 48 × 80 μA (see Figure 9

PMW3 (blue) bars for color mixing (see Figure 6

configuration screen and move the GRPPWM bar for dimming effect (see Figure 10

Fig 5. Drop-down menu selections

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PCA9955 demonstration board OM13330

Fig 6. Device configurati on s creen for PWM[0:7]

Fig 7. Device configurati on s creen for PWM[8:15]

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Fig 8. Device configuration screen for LEDOUT

Fig 9. Device configuration screen for LED output current setti ng

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PCA9955 demonstration board OM13330

Fig 10. Device configuration screen for ‘Other’ (Group and All registers)

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8.2 Color mixing and blinking LEDs

To set up a blinking demo, repeat step 1 through step 7 as in Section 8.1, then do the following:

1. In the Mode 2 (= 0x25) selection window (middle left), check the

2. To set a blink cycle, click the ‘Other’ configuration screen and move the GRPFREQ

3. For example, set the GRPPWM to 0x52 (32 % duty cycle) and the GRPFREQ to 0x0B

4. Change the PWM[1:3 ] values, GRPPWM and GRPFREQ values to create different

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PCA9955 demonstration board OM13330

‘Group control = dimming’ box to change the mode to ‘Group control = blinking’.

bar to select blinking frequency as well as the GRPPWM bar to select the duty cycle (see Figure 11

(0.5 second) for a one-third duty cycle and blink every half second on D3 RGB LED.

blink patterns and colors.

Fig 11. E xample of short blink every half second

9. Support

For support, send an E-mail to: i2c.support@nxp.com

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10. Abbreviations

Table 2. Abbreviations

Acronym Description

ESD ElectroStatic Discharge GUI Graphical User Interface

C-bus Inter-Integrated Circuit bus

I IC Integrated Circuit LED Light-Emitting Diode PC Personal Computer PWM Pulse Width Modulator RAM Random Access Memory RGB Red/Green/Blue RGBA Red/Green/Blue/Amber SMBus System Management Bus USB Universal Serial Bus

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PCA9955 demonstration board OM13330

11. References

[1] PCA9955, 16-channel Fm+ I2C-bus 57 mA constant current LED driver —

Product data sheet; NXP Semiconductors;

www.nxp.com/documents/data_sheet/PCA9952_PCA9955.pdf

[2] UM10206, “I2C Demonstration Board 2005-1 Quick Start Guide” —

NXP Semiconductors; www.nxp.com/documents/user_manual/UM10206.pdf

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12. Legal information

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PCA9955 demonstration board OM13330

12.1 Definitions

Draft — The document is a draft version only. The content is still under

internal review and subject to formal approval, which may result in modifications or additions. NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information.

12.2 Disclaimers

Limited warranty and liability — Information in this document is believed to

be accurate and reliable. However, NXP Semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. NXP Semiconductors takes no responsibility for the content in this document if provided by an information source outside of NXP Semiconductors.

In no event shall NXP Semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory.

Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semi conductors’ aggregat e and cumulative liabil ity towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of NXP Semiconductors.

Right to make changes — NXP Semiconductors reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof.

Suitability for use — NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. NXP Semiconductors and its suppliers accept no liability for inclusion and/or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the cu stomer’s own risk.

Applications — Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconduct ors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification.

Customers are responsible for the design and operation of their applications and products using NXP Semiconductors product s, and NXP Semiconductors accepts no liability for any assistance with applications or customer product

design. It is customer’s sole responsibility to determine whether the NXP Semiconductors product is suitable and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products.

NXP Semiconductors does not accept any liability related to any default , damage, costs or problem which is based on any weakness or default in the customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer’s third part y customer(s). NXP does not accept any liability in this respect.

Export control — This document as well as the item(s) described herein may be subject to export control regulations. Export might require a prior authorization from competent authorities.

Evaluation products — This product is provided on an “as is” and “with all faults” basis for evaluation purposes only. NXP Semiconductors, its affiliates and their suppliers expressly disclaim all warranties, whet her express, implied or statutory, including but not limited to the implied warranties of non-infringement, merchantability and fitness for a particular purpose. The entire risk as to the quality, or arising out of the use or performance, of this product remains with customer.

In no event shall NXP Semiconductors, its affiliates or their su ppliers be liable to customer for any special, indirect, consequential, punitive or incidental damages (including without limitation damages for l oss of bu siness, busi ness interruption, loss of use, loss of data or information, and the like) arising out the use of or inability to use the product, whether or not based on tort (including negligence), strict liability, breach of contract, breach of warranty or any other theory , even if advised of the possibility of such damages.

Notwithstanding any damages that customer might incur for any reason whatsoever (including without limitation, all damages referenced above and all direct or general damages), the entire liability of NXP Semiconductors, its affiliates and their suppliers and customer’s exclusive remedy for all of the foregoing shall be limited to actual damages incurred by customer based on reasonable reliance up to the greater of the amount actually paid by customer for the product or five dollars (US$5.00). The foregoin g limita tions, exclusions and disclaimers shall apply to the maximum extent permitted by applicable law, even if any remedy fails of its essential purpose.

Translations — A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy between the translated and English versions.

12.3 Trademarks

Notice: All referenced brands, prod uct names, service names and trademarks are the property of their respective owners.

C-bus — logo is a trademark of NXP B.V.

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13. Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.1 Assumptions. . . . . . . . . . . . . . . . . . . . . . . . . . . 3

3.2 Static handling requirements . . . . . . . . . . . . . . 3

3.3 Minimum system requirements. . . . . . . . . . . . . 3

3.4 Power requirements . . . . . . . . . . . . . . . . . . . . . 3

4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4.1 I2C demo board 2005-1 and WIN-I2CUSB Lite

software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4.2 OM13330 connection to

I2C demo board 2005-1 . . . . . . . . . . . . . . . . . . 4

4.3 OM13330 connection to Win-I2CUSB

hardware adapter board. . . . . . . . . . . . . . . . . . 5

5 Hardware description . . . . . . . . . . . . . . . . . . . . 6

6 Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

7 OM13330 demonstration board main

components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

8 PCA9955 evaluation steps . . . . . . . . . . . . . . . . 8

8.1 Color mixing and dimming LEDs . . . . . . . . . . . 8

8.2 Color mixing and blinking LEDs . . . . . . . . . . . 13

9 Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

10 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 14

11 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

12 Legal information. . . . . . . . . . . . . . . . . . . . . . . 15

12.1 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

12.2 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 15

12.3 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 15

13 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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Please be aware that important notices concerning th is document and the product(s) described herein, have been included in section ‘Legal information’.

For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com

Date of release: 7 June 2012

Document identifier: UM10572