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.

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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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 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

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NXP Semiconductors UM10709

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

(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

(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

(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.

(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.

(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

(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.

(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.

(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

(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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NXP Semiconductors UM10709

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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NXP Semiconductors UM10709

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

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

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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

SCL

SDA

+5V

+3.3V

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

BLM18BD471SN1

1 2

BLM18BD471SN1

10K

TP1

U1 PCA9956B

REXT

AD0

AD1

AD2

LED0

LED1

LED2

LED3

LED4

LED5

LED6

LED7

Vss

LED8

LED9

LED10

Vss

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

JUMPER3x2

5 6

1.1K

L3 HI1206N101R-10 CON2

9-pin Female

R22

10K

CON1

9-pin Male

R18 0 ohm

CON3

5-pin Male

LTST-C170GKT

R19 31.6K

R14 0 ohm

R20 34.8K

CON4

HEADER 7x2/SM

3 4

5 6

7 8

910

11 12

13 14

AVR-M1608C080M1

VARISTOR

10 uF

R12 34.8K

R15 31.6K

R21 0 ohm

R8 0 ohm

0.01uF

R16 34.8K

JUMPER4x2

1 2

3 4

5 6

7 8

R17 0 ohm

R2 1.5k

TP3

R6 2K

JUMPER4x2

1 2

3 4

5 6

7 8

PRTR5V0U2AX

GND

I/O1

2I/O2 3

VCC 4

0.1uF

1.1K

1 2

JUMPER4x2

3 4

5 6

7 8

J10

10 uF

4.7 uF

R13 0 ohm

R11 31.6K

TP4

R7 0 ohm

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