NXP Semiconductors PCA9745B User Manual
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NXP Semiconductors PCA9745B User Manual

NXP Semiconductors PCA9745B User Manual

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UM11009
PCA9745B demonstration board OM13524
Rev. 1 — 23 June 2016
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Content
Keywords
SPI-bus, PCA9745B, RGB and White LEDs, 16-channel x 8-bit PWMs
Abstract
The OM13524 demo board is easy to test and design for the PCA9745B,
a 16-channel SPI 4-wire bus 57 mA constant current and outputs allow up
to 20 V for LED supply. This demo board, along with the Win-I2CUSB
hardware board or Fm+ development board (OM13260), provides an
easy to use evaluation platform.
User manual

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Summary of Contents for NXP Semiconductors PCA9745B

  • Page 1 SPI-bus, PCA9745B, RGB and White LEDs, 16-channel x 8-bit PWMs Abstract The OM13524 demo board is easy to test and design for the PCA9745B, a 16-channel SPI 4-wire bus 57 mA constant current and outputs allow up to 20 V for LED supply. This demo board, along with the Win-I2CUSB hardware board or Fm+ development board (OM13260), provides an easy to use evaluation platform.
  • Page 2 Initial version Contact information For more information, please visit: http://www.nxp.com UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016 2 of 28...

  • Page 3: Introduction

    • A complete evaluation platform for the PCA9745B 16-channel SPI-bus constant current LED driver • Easy to use GUI based software demonstrates the capabilities of the PCA9745B • On-board four white and four RGB LEDs for visual experience • Convenient test points for easy scope measurements and signal access •...

  • Page 4: Installation

    The OM13260 Fm+ I2C bus development board should be disconnected from your PC before connecting the OM13524 PCA9745B demo board on to it. The OM13524 board has a 9-pin male connector (CON1) that connects to the 8-pin male connector (CN16) on the Fm+ I2C bus development board using six jumper wires as shown in the CON1(9-pin) ...

  • Page 5: Om13524 Connection To Win-I2Cusb Hardware Adapter Board

    4.3 OM13524 connection to WIN-I2CUSB hardware adapter board The Win-I2CUSB board should be disconnected from your PC before connecting the OM13524 PCA9745B demo board on to it. The OM13524 board has a 9-pin male connector (CON1) that connects to the 14-pin male connector (J1) on the Win-I2CUSB board using six jumper wires as shown in the CON1(9-pin) ...
  • Page 6 UM11009 NXP Semiconductors PCA9745B demonstration board OM13524 Fig 2. PCA9745B demo board (OM13524) connecting to the WIN-I2CUSB board UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev.
  • Page 7 PCA9745B demonstration board OM13524 Fig 3. PCA9745B demo board (OM13524) UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016 7 of 28...

  • Page 8: Hardware Description

    PCA9745B (3-pin) = +3.3V) 1-2: select +5V 2-3: select +3.3V This 3x2 jumper is used to select Rext (pin1) value for PCA9745B (3x2-pin) (Rext=1 K, 1-2: select Rext = 1K and max. o/p current is 57.3 mA 57 mA@max) 3-4: select Rext = 1.5K and max.
  • Page 9 1-2: select V 3-4: select pull-up with 31.6K 5-6: select pull-down with 34.8K 7-8: select GND 9-10: SDO for last slave device of PCA9745B in SPI daisy-chain 9-10 This 5x2 jumper is used to select input value for pin 4 (5x2-pin)
  • Page 10 CON4 14-pin This 14-pin header is used to connect to Win-I2CUSB hardware board as I2C master device to drive this demo board (no use for PCA9745B) header Test Point 1 This TP1 is used to drive /RESET input pin25 from external when J6 is...

  • Page 11: Schematic

    PCA9745B demonstration board OM13524 6. Schematic Fig 4. PCA9745B demo board schematic UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016 11 of 28...

  • Page 12: Om13524 Demonstration Board Main Components

    1 green LED C170GKT supply either 3.3 V or 5 V indicator Fig 5. PCA9745B SPI Daisy-Chain LED driver block diagram UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.

  • Page 13: Pca9745B Evaluation Steps With Win-I2Cusb Board

    NXP Semiconductors PCA9745B demonstration board OM13524 8. PCA9745B evaluation steps with WIN-I2CUSB board The PCA9745B is controlled by WIN-SPIUSB GUI in Expert mode as shown in Fig 6. Drop-down menu selection for SPI expert mode Connect the hardware as described in Section 4.3.
  • Page 14 ,08,FF 0,80,C0,Comments: set PWMALL=C0h 0,0A,FF 0,0C,40,Comments: set GRPPWM=40 0,00,C0 UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016 14 of 28...
  • Page 15 4. Click the ‘Send All’ button, all the valid messages on the screen will be sent in the order of the row number (Msg #). The action will be performed one time. 5. User can program the MOSI (Master Out Slave In) Data to PCA9745B, the first 7-bit is to access the address of register and 8 bit to indicate Read (1) or Write (0), the next byte is data to read or write.
  • Page 16 Message data in Expert mode to demo all White and RGB LEDs for blinking UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016...

  • Page 17: Pca9745B Evaluation Steps With Fm+ Development Board

    NXP Semiconductors PCA9745B demonstration board OM13524 9. PCA9745B evaluation steps with Fm+ development board The PCA9745B is controlled by Fm+ development board GUI in Expert mode as shown Fig 8. Selecting Expert Mode from Fm+ development board GUI Connect the hardware as described in Section 4.2.
  • Page 18 0,82,01,Comments: must set IREFALL = 01 during gradation ,7A,E4 2000,7C,0F,Comments: set GRAD_CNTL UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016 18 of 28...

  • Page 19: Two Pca9745B Demo Boards In Daisy-Chain Connection

    4. Click the ‘Send All’ button, all the valid messages on the screen will be sent in the order of the row number (Msg #). The action will be performed one time. 5. User can program the MOSI (Master Out Slave In) Data to PCA9745B, the first 7-bit is to access the address of register and 8 bit to indicate Read (1) or Write (0), the next byte is data to read or write.
  • Page 20 500,0A,10,0A,04,Comments: set LEDs on 0,08,10,08,04 800,82,00,82,00,Comments: write IREFALL = 00 0,0A,10,0A,04 UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016 20 of 28...
  • Page 21 800,76,00,82,1F,Comments: write IREFALL = 1Fh, set GRAD_GRP_SEL1=00h 0,74,00,0A,40 0,78,00,82,00,Comments: write IREFALL = 00h,set GRAD_GRP_SEL2=00h UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016 21 of 28...
  • Page 22 5000,0B,FF,0E,00,Comments: set GRPFREQ=00, read LEDOUT3 from 2nd device 0,00,55,0C,40 UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016 22 of 28...
  • Page 23 0,00,00,0E,01 Sequence:01,02,03,04,05,06,07,08,09,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,3 1,32,33,34,35,36,37,38 3. The Fm+ development board as SPI master drives two PCA9745B demo boards in daisy-chain as shown in the 10. After open the “SPI daisy chain demo with two PCA9745B devices” text file, the “NXP Fm+ Board GUI” in Expert mode screen will be displayed all messages, then click the ‘Send All’...

  • Page 24: Support

    C-bus 57 mA / 20V constant current LED driver Product data sheet; NXP Semiconductors: http://www.nxp.com/documents/data_sheet/PCA9745B.pdf UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016 24 of 28...

  • Page 25: Legal Information

    Translations — A non-English (translated) version of a document is for reference only. The English version shall prevail in case of any discrepancy In no event shall NXP Semiconductors be liable for any indirect, incidental, between the translated and English versions.

  • Page 26: List Of Figures

    Message data in Expert mode to demo all white and red LEDs for gradation ......19 Fig 10. Two PCA9745B demo boards connecting to the Fm+ development board ......... 23 UM11009 All information provided in this document is subject to legal disclaimers.

  • Page 27: List Of Tables

    Table 2. OM13524 demo board main components ..12 UM11009 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. User manual Rev. 1 — 23 June 2016 27 of 28...

  • Page 28: Table Of Contents

    OM13524 demonstration board main components ............12 PCA9745B evaluation steps with WIN-I2CUSB board ..............13 PCA9745B blinking demo for all White and RGB LEDs ..............13 PCA9745B evaluation steps with Fm+ development board ........... 17 PCA9745B gradation demo for White and Red LEDs ..............
  • Page 29 X-ON Electronics Authorized Distributor Click to view similar products for category: LED Lighting Development Tools Click to view products by manufacturer: Other Similar products are found below : MAX20444BEVKIT# DC871A-C MIKROE-2153 MIKROE-1295 FEBFL7733A_L53U021A CY3267 105020073 DC1436A DC1268B-A DC1406A DC2013A REFXDPL8221U100WTOBO1 OM13330,598 DC1019A DC1706A EVAL- CN0410-ARDZ DC1772A TPS92692EVM-880 TPS92830EVM DC2575A DC1285A DC2345A HV9918DB1 DC1521A 104020005...

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