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NXP Semiconductors PCA9955A User Manual Download Page 2

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 

2 of 24

Contact information

For more information, please visit: 

http://www.nxp.com

For sales office addresses, please send an email to: 

[email protected]

NXP Semiconductors

UM10729

PCA9955A/B demonstration board OM13483

 

Revision history

Rev

Date

Description

2.0

20170801

Added PCA9955B; updated schematics

1.0

20140723

User manual; initial release.

Summary of Contents for PCA9955A

Page 1: ...tract The OM13483 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 PCA9955A B a 16 channel...

Page 2: ...ust 2017 2 of 24 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 UM10729 PCA9955A B...

Page 3: ...he 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 exter...

Page 4: ...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 us...

Page 5: ...ct to legal disclaimers NXP Semiconductors B V 2017 All rights reserved User manual Rev 2 1 August 2017 5 of 24 NXP Semiconductors UM10729 PCA9955A B demonstration board OM13483 Fig 1 PCA9955A B demo...

Page 6: ...60 Fm I2C bus development board should be disconnected from your PC before mounting the OM13483 board onto it The OM13483 board has a 9 pin female connector CON2 that connects to the CN2 male connecto...

Page 7: ...ard should be disconnected from your PC before connecting the OM13483 board on to it The OM13483 board has a 14 pin male connector CON4 that connects to the 14 pin male connector J1 on the Win I2CUSB...

Page 8: ...s 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 PCA9955A B connected 1 2 for VDD 5 V...

Page 9: ...resistor required for PCU9955A J5 2 pin Short Short connect VDD pin 28 to PCA9955A B Open connect current meter to measure the IDD on PCA9955A B J6 2 pin Open Short force RESET pin 25 to GND Open 10...

Page 10: ...l 20 V input for LEDs supply voltage The J13 is open to supply this 20 V voltage to all LEDs J24 2 pin GND External GND input for LEDs supply voltage J25 J27 J29 J31 2 pin Short These jumpers are used...

Page 11: ...d to about 1 0 ounce copper Green LED for Vdd indicator open to measure the U1 current open no PU for PCU9955A 1 2 normal I2C or SPI addressable 2 3 SPI daisy chain SPI_SCLK SPI_SCLK SPI_SDI Pins 5 9...

Page 12: ...channels LED 0 3 and last four channels LED 12 15 LED voltage select OPEN use external voltage 1 2 internal 3 3V 2 3 internal 5V LED15 open test ouput current measurement LED12 short test RGB4 R G B R...

Page 13: ...ess is set to 0x02 on J7 J9 and J10 set AD 0 2 GND for PCA9955A B demo board When you have correctly installed the software and the demonstration board hardware is connected and recognized by the comp...

Page 14: ...rt Mode Data File 00 Write Yes 0 06 Comments SW reset 02 Write Yes 0 45 80 Comments write IREFALL to 80h 225 uA x 128 28 8 mA per channel 02 Write Yes 500 82 01 01 01 01 Comments start write LEDOUTx r...

Page 15: ...Comments write GRPPWM 80h for duty cycle ON OFF ratio in 50 and GRPFREQ 02h 131 ms for blinking period 02 Write Yes 2000 86 A0 02 Comments write GRPPWM C0h for duty cycle ON OFF ratio in 62 5 and GRPF...

Page 16: ...ax in IREF0 IREF1 02 Write Yes 50 02 05 Comments set LED0 and LED1 are fully ON 02 Write Yes 1 01 11 Comments Clear all error status bits in EFLAGn registers by writing bit4 1 in MODE2 02 Read Yes 0 0...

Page 17: ...is subject to legal disclaimers NXP Semiconductors B V 2017 All rights reserved User manual Rev 2 1 August 2017 17 of 24 NXP Semiconductors UM10729 PCA9955A B demonstration board OM13483 Fig 9 Exampl...

Page 18: ...ardware as described in Section 4 3 All jumpers are in default setting and device address is set to 0x02 on J7 J9 and J10 set AD 0 2 GND for PCA9955A B demo board When you have correctly installed the...

Page 19: ...EDOUTx register to turn on blue LEDs 02 Write Yes 300 82 01 00 00 00 Comments start write LEDOUTx register to turn on white LEDs 02 Write Yes 300 82 00 05 00 00 Comments start write LEDOUTx register t...

Page 20: ...C9 78 00 00 00 00 00 00 00 00 00 00 00 00 55 55 00 00 00 00 03 Comments set group0 in continuous mode IREF_GRP 240x225 27mA 60 step 64ms 450ua per step ramp up dn time 3 9s hold on off 0 25s 02 Write...

Page 21: ...disclaimers NXP Semiconductors B V 2017 All rights reserved User manual Rev 2 1 August 2017 21 of 24 NXP Semiconductors UM10729 PCA9955A B demonstration board OM13483 Fig 11 Message data in Expert mod...

Page 22: ...LED driver Product data sheet NXP Semiconductors www nxp com documents data_sheet PCA9955A pdf 2 UM10206 I2C Demonstration Board 2005 1 Quick Start Guide NXP Semiconductors www nxp com documents user_...

Page 23: ...iconductors products 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 Semic...

Page 24: ...equirements 3 3 4 Power requirements 3 4 Installation 4 4 1 I2C demo board 2005 1 and Win I2CUSB Lite software 4 4 2 OM13483 connection to I2C demo board 2005 1 4 4 3 OM13483 connection to Fm I2C bus...

Page 25: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information NXP OM13483UL...

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