UM10505 OM11057 quick start guide
Contents
1. 3 Board details 6 3 1 Power options and ON OFF switch 6 3 2 PCF8885 6 3 2 1 Sensitivity and approach speed 6 3 2 2 Color selection buttons 6 3 2 3 SWIC WIS iua ceca en does X rriki dee XO RE 7 3 2 4 vile dM DC 7 3 3 PCA8886 proximity sensor 7 3 3 1 Sensitivity and approach speed 7 4 Add on boards 9 4 1 OMII057A L u yu Eon dea 9 4 1 1 Operation with OM11057A 11 4 1 2 Operation via external IC master 11 4 2 ONTIDSTB uc Swe d P AER BU ER cd E 11 4 2 1 Operation with OM11057B 13 4 2 2 Operation via external IC master 13 5 References nnn 14 6 Legal information 15 6 1 DEIMUONS 2 eera 28 Sad need Oe eee eee 15 6 2 Disclaimers 15 6 3 LicenSseS 15 6 4 Trademarks 15 7 PIQUICS uu 6 5 apana 16 8 Contents cis vare xa RE PO bes 17 Please be aware that important notices concerning this document and the product s described herein have been included in section Legal information NXP B V 2013 All rights reserved For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com Date of release 10 April 2013 Document identi2. 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 6 3 Licenses ICs with capacitive sensing functionality This NXP Semiconductor
3. finger moves away the LED will switch off 4 1 2 Operation via external I2C master The add on board can also be operated through the I C connector K3 see Figure 8 and Figure 10 3 3 V or 5 V may be used for supply In this case only the INT and SLEEP pins of IC1 are wired to the connector and IC2 through the 12C bus Fig 10 OM11057A I C connector 4 2 OM11057B Key features his flex print board has been designed to demonstrate implementation of 14 touch buttons by multiplexing the 8 channels of the automotive PCA8885 e PCA8885 is configured in 2 key mode such that two sensor pads creating a button have to be touched in order to report a capacitive event Dimension of the board 190 mm x 296 mm There is an opening for backlighting LEDs in the middle of the buttons UM10505 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 11 of 17 NXP Semiconductors U M1 0505 OM11057 quick start guide a Top view b Bottom view Fig 11 OM11057B UM10505 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 12 of 17 NXP Semiconductors U M1 0505 OM11057 quick start guide 4 2 1 Operation with OM11057B This flex print can be supplied and operated with OM11057 as shown below A touch on o
4. 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 UM10505 All information provided in this document is subject to legal disclaimers OM11057 quick start guide 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 Non automotive qualified products Unless this data sheet expressly states that this specific NXP Semiconductors product is automotive qualified the product is not suitable for automotive use It is neither
5. qualified nor tested in accordance with automotive testing or application requirements NXP Semiconductors accepts no liability for inclusion and or use of non automotive qualified products in automotive equipment or applications In the event that customer uses the product for design in and use in automotive applications to automotive specifications and standards customer a shall use the product without NXP Semiconductors warranty of the product for such automotive applications use and specifications and b whenever customer uses the product for automotive applications beyond NXP Semiconductors specifications such use shall be solely at customer s own risk and c customer fully indemnifies NXP Semiconductors for any liability damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NXP Semiconductors standard warranty and NXP Semiconductors product specifications 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
6. switch wheel and a slider by using an 8 channel sensor circuit in multiplexed mode Enables touch sensitivity through 3 mm acrylic overlay plate Works stand alone Can be powered either with 2 AA batteries or via USB Feedback with a piezoelectric sounder Feedback with RGB diodes e Software can be modified using LPC link e Low cost Cortex MO LPC1114 controller board with 32 kB Flash Memory e PCF8885 8 channel capacitive sensor e PCA8886 2 channel proximity sensor One channel reserved for external sensor e PCF8536 LCD LED driver Remark The physical properties of any touch experiment are determined by different factors These factors are e Size of touching entity single finger several fingers palm hand e Speed of approaching object e Environmental properties like humidity contamination By default the board is configured to e Accept a typical human touch too fast and too slow movements are screened out No fly or turtle will be detected As a push button If you just touch it slightly as it would be hot the capacitance formed by the finger and the sensor area will be to small just a few mm and will not be recognized as a touch The demo board should be put on a desk and not touched on the bottom side as this would short circuit the sensor inputs and cause false switching All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User
7. 013 9 of 17 jenuew Jesf LOZ Idy OL Z eH S1euure osip e69 o1 1oe qns s JUSLUNDOP s y ui pepiaoud uomeuuoyjur y ZL JO OL SOSOLWN peniasas sluBu Iv L0Z A d dXN O C49 10pF LED ks L XE R15 15k d F 1 2 A C21 220NF NN L lt R16 45k F NN ale LED3 C22 220NF A JE R17 1 5k F KE D C28 220NF NN EE R18 1 5k x F 1 2 s W C24 220NF AE R19 1 5k A F L 2 A C25 220NF LED6 z lt R20 1 5k x T or WN al Ja raat C26 220NF qd b C27 220NF LED NN lt R22 1 5k ANE F TTE C28 220NF Fig 9 OM11057A circuit diagram FB1 IC2 PCF8885 N7 N6 N5 N4 N3 VDD C20 L C19 LE 2204F 100nF IC3 PCA9535PW NTREGD VDD C38 Z 2 039 p an r F r Fe INTN IN VDD NN p SLEEP r SLEEP1 A0 TEST R1 560R SDA fr ql F sa fF vss R2 560R creo E cect gt cPC2 F ceca E LI Lu na LL t c c c o o o o Tr Lx e ex e e e R13 560R _ R14 560R r M R30 15k C35 220NF 2g F sj R29 15k Tp A MEM R28 15k C33 220NF 201 __hk Ra 15k H NNUS CM 220NF TL 15k R26 pg L F R25 15k HO NA Fr C29 220NF bis 20 L F R23 15k t IN LED9 10pF C55 C36 220NF ilr E NN C34 220NF iS ilr P N LED14 C32 220NF C30 220NF 210 nl N gt r wv LED10 Wy 2 4 5 202225 nee Ic Is I I 3l l SI als io
8. UM10505 OM11057 quick start guide Rev 2 10 April 2013 User manual Document information Info Content Keywords Capacitive switch sensor proximity switch OM11057 PCF8885 PCA8885 PCA8886 evaluation board Abstract The OM11057 is an evaluation board which can be used to demonstrate and evaluate the PCA8886 and PCF8885 capacitive touch and proximity sensors The board can be powered by using a Mini USB cable or battery NXP Semiconductors UM10505 Revision history OM11057 quick start guide Rev Date Description v 2 20130410 revised user manual V 1 20120402 new user manual first revision Contact information For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com UM10505 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 2 of 17 NXP Semiconductors U M1 0505 OM11057 quick start guide 1 Introduction UM10505 The purpose of this board is to demonstrate the capabilities of NXP s 8 channel touch sensor PCF8885 to implement buttons switch wheels and sliders as well as proximity sensing with the dual channel PCA8886 Features e Demonstration of the dual channel proximity sensor to wake up the board one channel reserved for external sensor pad e Demonstration of an interface with 4 buttons a
9. e of two interleaved sensor pads connected to two separate sensor channels In order to make sure that both channels are activated the touch should be centered on the graphical icon engraved on the acrylic overlay Switch wheel Fig 4 Switch wheel The switch wheel is implemented as eight interleaved pairs of sensor pads connected to eight sensor channels The touch will be recognized when moving from one to next segment Slider Fig5 Slider The slider is implemented as seven interleaved pairs of sensor pads connected to eight sensor channels The touch will be recognized when moving from one to next segment PCA8886 proximity sensor The proximity sensor pad is connected to the PCA8886 Sensitivity and approach speed The sensitivity for the proximity sensor is set by the CPC capacitor connected to the PCA8886 as shown in Figure 6 The specified maximum value for this component is 2 5 uF and the board is assembled with this value The approach speed sensitivity for proximity sensing is a result of the sampling frequency and set with the capacitor CLIN which has 47 pF on the board to set a sampling rate of 640 Hz and a switching time of 100 ms All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 7 of 17 NXP Semiconductors U M1 0505 OM11057 quick start guide CLIN C11 for sampling fr
10. equency CPC C9 for sensitivity WP L E CALIN E91 LRGAl l K AA SZEF ws 3 L EIWV 9uT163 VIWH04 37ISW Fig6 Capacitors for sensitivity and sampling frequency Hee m Iz iz iZ ER gt o EELIS proximity sensor pad Fig7 Proximity sensor pad UM10505 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 8 of 17 NXP Semiconductors U M1 0505 OM11057 quick start guide 4 Add on boards UM10505 4 1 Two add and boards are currently available for the OM11057 OM11057A This is a board designed to demonstrate high sensitivity allowing thick overlays 5 mm OM11057B This is a board designed to demonstrate usage of multiplexing on a flex print board OM11057A Key features Two PCF8885 packages One driving buttons the other driving a slider e Through holes in the buttons for backlight e PCA9535PW a GPIO expander drives the 16 LEDs mounted on the reverse side of the board e Supplied from the OM11057 main board through K2 or with external power through K3 This board is also prepared to be connected to an external 12C master through K3 Fig 8 OM11057A All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2
11. ex o Ll GND 3 5 P 72 Le R47 OR e INT1 d F g 2 R46 OR SLEEPT TE 10pF c53 R37 560 10pF C52 R36 560 10pF c50 R34 560 R44 0 NES mu R45 0 IC1 PCF8885 2 C41 10yF CLK IN NTREGD INTN IN FB3 VDD N7 VDD N6 NTN E N5 SLEEP a oe N4 A0 N3 TEST R3 560R N2 SDA sc L k vss R4 560R cPc0 cei gt cpc2 fe CPC3 b 2 2 2 2 C13 C12 C11 C10 470nF 470nF 470nF 470nF 2 2 2 2 C18 C16 C15 C14 4TOnF 470nF 470nF 470nF L1 IC4 4 TuH MCP1640 os VDD L C58 J b zl 100uF C57 ada R40 10uF 536K i SCL I2C 2 SDA DC li R39 309K l Ma stab 100 00 nderung 24 04 12 16 32 Interactionboard 1 Ausgabe 24 04 12 17 12 Datei Interactionboard 1 Rev1 1 13001 Projekt Interactionboard 1 Rev1 1 epinD ues y9inb 7S0LLINO SOSOLINN SIOJONPUODIWIIS dXN NXP Semiconductors U M1 0505 OM11057 quick start guide 4 1 1 Operation with OM11057A The PCF8885 IC on the main board has to be disconnected from the 12C bus by removing the jumpers on the R22 and R23 positions J2 and J3 shall be inserted to use the batteries to supply the add on board The operation is simple A touch on the buttons is indicated with the LED being switched on At the same time the choice will be displayed on the display on the main board Moving a finger on the slider will turn on the LED corresponding to the pair of channels activated at the moment and as soon as the
12. f 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 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 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 design It
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14. l 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 6 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 o
15. manual Rev 2 10 April 2013 3 of 17 NXP Semiconductors U M1 0505 OM11057 quick start guide 2 Quick start The demo board is powered up with the power switch e When the power is turned on a start up animation will be shown and the board will be set in RGB Red Green Blue mode This enables the user to obtain a mixture of red green and blue with varying intensity of each color e A touch on the color selection buttons should be centered on the graphical icon he sampling frequency is optimized for a human touch which means that very quick or slow touches will be ignored For switching between RGB RED GREEN and BLUE mode press the appropriate button the display will show RGB channels RED channel In RGB mode the control is similar to the living color lamp from Philips By using the switch wheel the LCD backlight will sweep through the entire light spectrum and the slider will do the same for the control panel lighting In RGB mode there is no end and no beginning so the wheel can be turned indefinitely in both directions same principle for the slider After a certain time you will end up at the same color of course e When navigating in the RGB mode if one of the colors RED GREEN or BLUE is chosen the scroll wheel and the slider will only affect the intensity of the color chosen in the mixture e f the board is not touched for 20 seconds it will switch to sleep mode The LEDs and the LCDs a
16. ne of 14 buttons is indicated by displaying the corresponding function name on the display of OM11057 and a click sound with a piezzo electric buzzer will be generated as well Fig 12 OM11057B flex connector 4 2 2 Operation via external IC master This add on board can also be operated by an I C master Either 3 3 V or 5 V can be used as supply The INT and SLEEP pins are wired to optional pins of the connector through R11 R12 R13 and R14 If the SLEEP pin is not used it has to be wired to GND or decoupled with several hundred nF capacitance Otherwise this pin will catch up disturbances such that the sensor IC fails UM10505 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 13 of 17 NXP Semiconductors U M1 0505 OM11057 quick start guide 5 References 1 PCAS886 Dual channel capacitive proximity switch with auto calibration and large voltage operating range Data Sheet 2 PCF8885 Capacitive 8 channel proximity switch with auto calibration and very low power consumption Data Sheet UM10505 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 14 of 17 NXP Semiconductors UM10505 6 Legal information 6 1 Definitions Draft The document is a draft version only The content is stil
17. r function of the value of the reservoir capacitors named CPCO to CPC7 shown in Figure 2 The specified maximum value for this component is 470 nF and the board is assembled with this value to allow 3 mm thick acrylic overlay with margin in sensitivity The approach speed sensitivity is a parameter that describes the speed of an approaching object to be detected This board is optimized for a human touch and filters out everything slower or faster The approach speed sensitivity is directly set by the sampling frequency Reducing the value of the CPC capacitors makes the range of this speed smaller as the sensitivity would be lower The nominal oscillator frequency is 70 kHz the sampling frequency of the board is 1 914 kHz resulting in a switching time of 33 milliseconds This time starts when a finger enters the coverage distance of the sensor pad and as soon as 64 consecutive samples are counted the output of the sensor is switched Hence there is no additional time for post processing of the samples Color selection buttons Fig 3 Color selection buttons with pairs of interleaved sensor pads All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 6 of 17 NXP Semiconductors U M1 0505 UM10505 3 2 3 3 2 4 3 3 3 3 1 OM11057 quick start guide As shown in Figure 3 the buttons for color selection are mad
18. re switched off and a little red LED is switched on to indicate that the board is in sleep mode In order to wake up the board approach the board with your hand The status of the board will be the same as before sleep mode connector for external interaction boards color selection m power ON OFF switch lt power source switch switch wheel proximity slider PCA8886 sensor pad Fig 1 OM11057 top view UM10505 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 4 of 17 NXP Semiconductors UM10505 OM11057 quick start guide CPC capacitors PCF8885 Fig 2 OM11057 bottom view UM10505 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 5 of 17 NXP Semiconductors U M1 0505 OM11057 quick start guide 3 Board details 3 1 3 2 3 2 1 3 2 2 UM10505 Power options and ON OFF switch Figure 1 shows the ON OFF and power source selection switches 2 AA batteries a USB cable or an external power supply can be used By default batteries are used PCF8885 The color selection buttons the switch wheel and the slider are connected to the PCF8885 Sensitivity and approach speed The sensitivity of the sensor channels of the PCF8885 is approximately a linea
19. s IC is made under license to European Patent No 0723339 owned by EDISEN SENSOR SYSTEME GmbH amp CO KG and counterparts Any license fee is included in the purchase price 6 4 Trademarks Notice All referenced brands product names service names and trademarks are the property of their respective owners NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 15 of 17 NXP Semiconductors U M1 0505 OM11057 quick start guide 7 Figures Fig 1 OM11057 top view 4 Fig 2 OM11057 bottom view 5 Fig 3 Color selection buttons with pairs of interleaved sensorpads 6 Fig4 Switch wheel 7 Ep I0 PTT 7 Fig 6 Capacitors for sensitivity and sampling frequency 8 Fig 7 Proximity sensorpad 8 Fig ONTIDSZA aues ed coed 9x9 Sua saca mee 9 Fig 9 OM11057A circuit diagram 10 Fig 10 OM11057A I C connector 11 Fig 11 OM11057B 12 Fig 12 OM11057B flex connector 13 UM10505 All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved User manual Rev 2 10 April 2013 16 of 17 NXP Semiconductors U M1 0505 OM11057 quick start guide 8 Contents 1 INTOGUCUION uu y uo eei RRESUPESSEEESGPS 3 2 Quick start 4
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