UM10574 PCA9685 demonstration board OM13332 Rev. 1 — 1 April 2014 User manual Document information Info Content Keywords Fm+ I2C-bus, PCA9685, RGB and White LEDs, 16 channel x 12-bit PWMs Abstract The OM13332 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 PCA9685, the LED output driver is programmed to be either open-drain with a 25 mA current sink capability at 5 V or totem pole with a 25 mA sink. The PCA9685 operates with a supply voltage range of 2.3 V to 5.5 V and the inputs and outputs are 5.5 V tolerant. This demo board, along with the Win-I2CUSB Lite GUI (PC based), provides an easy to use evaluation platform. UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 Revision history Rev Date Description 1.0 20140401 user manual; initial release Contact information For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] UM10574 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 2 of 14 UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 1. Introduction The PCA9685 evaluation board features LEDs for color backlighting and Ambilight demonstrations. A graphical interface allows the user to explore the different functions of the driver easily. 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 PCA9685 16-channel, 12-bit PWM Fm+ I2C-bus 25 mA voltage switch LED driver • • • • • Easy to use GUI-based software demonstrates the capabilities of the PCA9685 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 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 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 www.demoboard.com). 3.4 Power requirements The NXP demonstration board I2C 2005-1 and OM13332 hardware obtain power from the PC USB port. Take care not to exceed the USB port current capabilities. UM10574 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 3 of 14 UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 4. Installation 4.1 I2C demo board 2005-1 and WIN-I2CUSB Lite software The OM13332 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 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 a 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 OM13332 connection to I2C demo board 2005-1 The I2C demo board 2005-1 should be disconnected from your PC before mounting the OM13332 board on to it. The OM13332 board has a 9-pin female connector (J2) that connects to the JP1 male connector on the I2C demo board 2005-1 as shown in Figure 1. With both boards facing you, with USB connector on the left-hand side as shown in Figure 1, connect the OM13332 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 PCA9685. Fig 1. PCA9685 demo board (OM13332) mounting to the I2C demo board 2005-1 (OM6275) UM10574 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 4 of 14 UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 4.3 OM13332 connection to Win-I2CUSB hardware adapter board The Win-I2CUSB board should be disconnected from your PC before connecting the OM13332 board on to it. The OM13332 board has a 14-pin male connector (J4) that connects to the 14-pin male connector (J1) on the Win-I2CUSB board as shown in Figure 2. Connect the OM13332 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 PCA9685. Fig 2. PCA9685 demo board (OM13332) connecting to the Win-I2CUSB board UM10574 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 5 of 14 UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 5. Hardware description Fig 3. PCA9685 demo board (OM13332) Figure 3 shows the following items on the hardware: • J2 (9-pin) is for connection to JP1 on I2C demo board 2005-1. • J3 (9-pin male) is for connection to the second PCA9685 demo board or I2C-bus device. • J1 selects VDD power for PCA9685, connected 1-2 for VDD = 3.3 V and connected 2-3 for VDD = 5 V. • S1 8-position DIP switch to select I2C-bus address A[0:5] = S1[1:6] for this device (default is 0x80, all switches S1[1:6] are ON position). S1[7] is used to control output enable (/OE, default is ON position to enable LED outputs), S1[8] is used to control EXTCLK (default is ON position to disable the EXTCLK). • J4 (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). • /OE (TP1) is input to drive output enable (pin 23) when S1[7] is set to OFF position. • EXTCLK (TP2) is input to EXTCLK (pin 25) when S1[8] is set to OFF position. • J5 and J6 are GND pins for probing use. UM10574 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 6 of 14 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 9-pin female connector +5 V +5 V TP1 1 2 3 +3.3 V +5 V SCL_1 C1 10 μF 1 /OE R8 R7 R6 R5 R4 VDD_IN 1 EXTCLK Rev. 1 — 1 April 2014 SW1 SW DIP-8 SDA_1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 A0 A1 A2 A3 A4 LED0 LED1 LED2 LED3 LED4 LED5 LED6 LED7 VSS VDD SDA SCL EXTCLK A5 /OE LED15 LED14 LED13 LED12 LED11 LED10 LED9 LED8 28 27 26 25 24 23 22 21 20 19 18 17 16 15 SDA filter SCL filter EXTCLK A5 /OE LED15 LED14 LED13 LED12 LED11 LED10 LED9 LED8 C6 4.7 μF C5 0.1 μF J2 R9 1 kΩ 14-pin connector to/from WIN-I2CUSB Fm+ I2C master to drive PCA9685 D1 LTST-C170KGKT J4 GND +3.3 V PCA9685PW 3 2 1 VP for I2C pull-up VDD on WIN-I2CUSB board 2 (VP) VDO_IN SCL_1 4 6 GND SDA_1 8 10 12 14 +5 V 1 3 5 7 9 11 13 HEADER 7x2/SM I2CUSB CONNECTOR GND 3 2 1 +5 V LED0 R10 440 Ω LED1 R11 1.16 kΩ LED2 R12 720 Ω LED3 R13 720 Ω LED4 R14 440 Ω LED5 R15 1.16 kΩ R16 720 Ω R17 720 Ω LED8 R18 440 Ω LED9 R19 1.16 kΩ LED10 R20 720 Ω LED11 R21 720 Ω LED12 R22 440 Ω LED13 R23 1.16 kΩ LED14 R24 720 Ω LED15 R25 720 Ω limited the current to 2.5 mA white LED VF = 3.9 V red LED VF = 2.1 V green/blue LED VF = 1.8 V U2 1 LW-E67C-white D3 LED[1:3] A1 C2 A2 2 C1 C3 A3 L1 BLM18BD471SN1 D7 A1 C2 A2 D8 LED[13:15] A1 C2 A2 C1 C3 A3 LED[9:11] C1 C3 A3 I/O1 I/O2 4 3 +5 V LED4 GND C23 0.01 μF PRTR5V0U2AX SDA-filter L2 BLM18BD471SN1 SCL_1 D5 LED[5:7] C1 C3 A3 VCC SDA_1 LRTB_G6SG A1 C2 A2 GND D4 SCL-filter (470 Ω at 100 MHz) LW-E67C-white LRTB_G6SG close to 9-pin connector J3 LED8 D6 U3 1 LW-E67C-white 2 LRTB_G6SG LED12 L3 BLM18BD471SN1 D9 SDA_2 GND VCC I/O1 I/O2 4 3 +5 V C24 0.01 μF PRTR5V0U2AX SDA-filter LW-E67C-white L4 BLM18BD471SN1 LRTB_G6SG SCL_2 SCL-filter (470 Ω at 100 MHz) 019aac802 Fig 4. PCA9685 demo board schematic UM10574 7 of 14 © NXP Semiconductors N.V. 2014. All rights reserved. LED6 LED7 close to connector J2/J4 D2 LED0 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF 0.1 nF J6 PCA9685 demonstration board OM13332 All information provided in this document is subject to legal disclaimers. (external clock in) C2 GND 10 μF U1 A0 A1 A2 A3 A4 A5 LED0 LED1 LED2 (switched to GND when LED3 external clock is not used) LED4 LED5 LED6 LED7 (output enable) TP2 +3.3 V 10 kΩ 10 kΩ 10 kΩ 10 kΩ 10 kΩ 10 kΩ 10 kΩ 10 kΩ C4 10 μF R3 C3 10 μF R2 SCL_2 GND SDA_2 J3 J5 1 2 3 4 5 6 7 8 9 J1 VDD_IN +3.3 V R1 1 2 3 4 5 6 7 8 9 NXP Semiconductors 9-pin connector to/from I2C 2005-1 or to/from PCA9685 demo board 6. Schematic UM10574 User manual 9-pin connector to/from I2C 2005-1 or to/from PCA9685 demo board 9-pin female connector UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 7. OM13332 demonstration board main components Table 1. OM13332 demo board main components Device Description Address/LED output Location PCA9685PW 16-channel, 12-bit PWM Fm+ I2C-bus 25 mA voltage switch LED driver 0x80 for I2C demo board 2005-1 interface U1 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 PCA9685 power supply either 3.3 V or 5 V indicator - D1 8. PCA9685 evaluation steps The PCA9685 functions are controlled by WIN-I2CUSB Lite GUI. Refer to the PCA9685 data sheet for additional information on the registers and functionality. Connect the hardware as described in Section 4. The PCA9685 demo board address is set to 0x80 on DIP switch (S1) as A[0:5] = S1[1:6] = 000000 (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. Switched 3.3 V and 5.0 V power supplies are controlled through the ‘Options’ menu or by double-clicking on the 3.3 V or 5.0 V symbols on the bottom of the window. Power supplies are disabled by default and you must enable them before using the I2C-bus devices on the board. I2C-bus frequency is controlled through the ‘Options’ menu or by double-clicking the frequency symbol on the bottom of the window. 8.1 Dimming and brightness control for individual LED The PCA9685 has 4096 steps (12-bit PWM) of individual LED brightness control to vary from fully off (default) to maximum brightness. The LED output frequency (all LEDs) typically varies from 24 Hz to 1526 Hz (default of 1Eh in PRE_SCALE register results in a 197 Hz refresh rate with oscillator clock of 25 MHz). The duty cycle of PWM can be controlled independently using the ‘LEDn ON’ and ‘LEDn OFF’ registers. The resolution for the phase shift is 1⁄4096 of the target frequency. 1. From the ‘Device’ drop-down menus, select ‘LED Blinkers and Dimmers’, and from the subsequent drop-down menu select ‘PCA9685 16-channel LED Driver with 12-bit PWM’ as shown in Figure 5. 2. The device address is set to ‘80’ hexadecimal and cannot change. 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). UM10574 User manual All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 8 of 14 UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 3. For LED output that directly connects to LED as the demo board design, the INVRT bit in MODE2 register must be set to 1 by checking the ‘Output not inverted’ to ‘Output inverted’ and the OUTDRV bit in MODE2 register must be set to 0 by checking the ‘Totem pole outputs’ to ‘Open-drain outputs’ to make sure all LEDs are completed OFF state as shown in Figure 6. 4. The device configuration screen is displayed by clicking the following options: – ‘PWM 0 to 3’ individual brightness control for LED0 to LED3 – ‘PWM 4 to 7’ individual brightness control for LED4 to LED7 – ‘PWM 8 to 11’ individual brightness control for LED8 to LED11 – ‘PWM 12 to 15’ individual brightness control for LED12 to LED15 – ‘Control Registers’ all LED[0:15] brightness control and Prescale for all LEDs output frequency as shown in Figure 7 5. In Figure 6, uncheck the ‘LEDn Full Off’ box (lower bottom), adjust both ‘LEDn ON’ and ‘LEDn OFF’ bar for dimming/brightness effect, also move LED1 ON/OFF to control red, LED2 ON/OFF to control green, LED3 ON/OFF to control blue for color mixing. Remark: The LED ON time, which is programmable, is the time to assert the LED output and the LED OFF time, which is also programmable, is the time to negate the LED output. Fig 5. UM10574 User manual Drop-down menu selections All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 9 of 14 UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 UM10574 User manual Fig 6. Device configuration screen for PWM0 to PWM3 Fig 7. Device configuration screen Control registers All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 10 of 14 UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 8.2 Dimming and brightness control for all LEDs and Prescale The following steps to control dimming/brightness for all LEDs and adjust output frequency with prescale value: 1. Click the ‘Control Registers’ configuration screen for all LED[0:15] brightness control and Prescale for LEDs output frequency as shown in Figure 7. 2. In Figure 7, uncheck the ‘All LED Full Off’ box (lower bottom), adjust both ‘All LED ON’ and ‘All LED OFF’ bar for all LEDs dimming/brightness effect. 3. Adjust the ‘PRESCALE’ bar to program the LED output frequency (PWM) as shown below: – LED output frequency = (25 MHz or EXTCLK) ÷ (4096 × (prescale + 1)) – When Prescale = 0x1E (default is 30), the LED output frequency is (25 × 106) ÷ (4096 × 31) = 197 Hz – When Prescale = 0x03 (minimum is 3), the LED output frequency is (25 × 106) ÷ (4096 × 4) = 1526 Hz – When Prescale = 0xFF (maximum is 255), the LED output frequency is (25 × 106) ÷ (4096 × 256) = 24 Hz Remark: The PRESCALE register value can only be set/update when the SLEEP bit in the MODE1 register is set to logic 1 as shown in Figure 8. Apply external clock input to EXTCLK pin, user must set the SLEEP bit in MODE1 register, then write logic 1 to both the SLEEP and EXTCLK bits in MODE1 register to enable the external clock. Fig 8. UM10574 User manual PRESCALE to adjust LED output frequency when sleep enabled All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 11 of 14 UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 9. Support For support, send an E-mail to: [email protected] 10. Abbreviations Table 2. Abbreviations Acronym Description ESD ElectroStatic Discharge GUI Graphical User Interface I2C-bus Inter-Integrated Circuit bus 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 11. References UM10574 User manual [1] PCA9685, 16-channel, 12-bit PWM Fm+ I2C-bus 25 mA voltage switch LED driver — Product data sheet; NXP Semiconductors; www.nxp.com/documents/data_sheet/PCA9685.pdf [2] UM10206, “I2C Demonstration Board 2005-1 Quick Start Guide” — NXP Semiconductors; www.nxp.com/documents/user_manual/UM10206.pdf All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 12 of 14 UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 12. Legal information 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 Semiconductors’ aggregate and cumulative liability 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 customer’s own risk. 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 party 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, whether 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 suppliers be liable to customer for any special, indirect, consequential, punitive or incidental damages (including without limitation damages for loss of business, business 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 foregoing limitations, 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. Applications — Applications that are described herein for any of these products are for illustrative purposes only. NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. 12.3 Trademarks Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products, and NXP Semiconductors accepts no liability for any assistance with applications or customer product I2C-bus — logo is a trademark of NXP Semiconductors N.V. UM10574 User manual Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. All information provided in this document is subject to legal disclaimers. Rev. 1 — 1 April 2014 © NXP Semiconductors N.V. 2014. All rights reserved. 13 of 14 UM10574 NXP Semiconductors PCA9685 demonstration board OM13332 13. Contents 1 2 3 3.1 3.2 3.3 3.4 4 4.1 4.2 4.3 5 6 7 8 8.1 8.2 9 10 11 12 12.1 12.2 12.3 13 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Static handling requirements . . . . . . . . . . . . . . 3 Minimum system requirements. . . . . . . . . . . . . 3 Power requirements . . . . . . . . . . . . . . . . . . . . . 3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 I2C demo board 2005-1 and WIN-I2CUSB Lite software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 OM13332 connection to I2C demo board 2005-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 OM13332 connection to Win-I2CUSB hardware adapter board . . . . . . . . . . . . . . . . . . 5 Hardware description . . . . . . . . . . . . . . . . . . . . 6 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 OM13332 demonstration board main components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 PCA9685 evaluation steps . . . . . . . . . . . . . . . . 8 Dimming and brightness control for individual LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Dimming and brightness control for all LEDs and Prescale. . . . . . . . . . . . . . . . . . . . . . . . . . 11 Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 12 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Legal information. . . . . . . . . . . . . . . . . . . . . . . 13 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. © NXP Semiconductors N.V. 2014. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: [email protected] Date of release: 1 April 2014 Document identifier: UM10574