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ID 413C: Can Touch This: Designing Capacitive-Based Touch Solutions

ID 413C: Can Touch This: Designing Capacitive-Based Touch Solutions. Xaplos Inc. Mark F Rodriguez. Senior Engineering. 13 October 2010. Version: 1.0. Mr. Mark F Rodriguez. Senior Engineer @ Xaplos, Inc. Technology consultant with over 12 years of design experience.

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ID 413C: Can Touch This: Designing Capacitive-Based Touch Solutions

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  1. ID 413C: Can Touch This:Designing Capacitive-Based Touch Solutions Xaplos Inc. Mark F Rodriguez Senior Engineering 13 October 2010 Version: 1.0

  2. Mr. Mark F Rodriguez Senior Engineer @ Xaplos, Inc. Technology consultant with over 12 years of design experience. Responsible for the successful release of over 20 commercial products Special interest in medical device industry and home-based healthcare systems BSBE/MSBE from the University of Miami RECENT HMI RELATED PROJECTS: Handheld aftermarket automotive tuning unit Wearable life-sustaining medical device Educational tablet device for elementary students Reference design for Arrow Electronics Marine power distribution system

  3. Renesas Technology and Solution Portfolio Microcontrollers& Microprocessors#1 Market shareworldwide * SolutionsforInnovation Analog andPower Devices#1 Market sharein low-voltageMOSFET** ASIC, ASSP& MemoryAdvanced and proven technologies * MCU: 31% revenue basis from Gartner "Semiconductor Applications Worldwide Annual Market Share: Database" 25 March 2010 ** Power MOSFET: 17.1% on unit basis from Marketing Eye 2009 (17.1% on unit basis).

  4. Renesas Technology and Solution Portfolio Microcontrollers& Microprocessors#1 Market shareworldwide * SolutionsforInnovation Analog andPower Devices#1 Market sharein low-voltageMOSFET** ASIC, ASSP& MemoryAdvanced and proven technologies * MCU: 31% revenue basis from Gartner "Semiconductor Applications Worldwide Annual Market Share: Database" 25 March 2010 ** Power MOSFET: 17.1% on unit basis from Marketing Eye 2009 (17.1% on unit basis). 4

  5. Microcontroller and Microprocessor Line-up • Up to 1200 DMIPS, 45, 65 & 90nm process • Video and audio processing on Linux • Server, Industrial & Automotive Superscalar, MMU, Multimedia • Up to 500 DMIPS, 150 & 90nm process • 600uA/MHz, 1.5 uA standby • Medical, Automotive & Industrial High Performance CPU, Low Power • Up to 165 DMIPS, 90nm process • 500uA/MHz, 2.5 uA standby • Ethernet, CAN, USB, Motor Control, TFT Display High Performance CPU, FPU, DSC • Legacy Cores • Next-generation migration to RX R32C H8S H8SX M16C General Purpose Ultra Low Power Embedded Security • Up to 25 DMIPS, 150nm process • 190 uA/MHz, 0.3uA standby • Application-specific integration • Up to 10 DMIPS, 130nm process • 350 uA/MHz, 1uA standby • Capacitive touch • Up to 25 DMIPS, 180, 90nm process • 1mA/MHz, 100uA standby • Crypto engine, Hardware security 5

  6. Microcontroller and Microprocessor Line-up R8C 16 Bit CISC Superb Noise Performance Low Power Consumption Higher Functionality ASSP Lineup Low Pin Count Lineup • Up to 1200 DMIPS, 45, 65 & 90nm process • Video and audio processing on Linux • Server, Industrial & Automotive Superscalar, MMU, Multimedia • Up to 500 DMIPS, 150 & 90nm process • 600uA/MHz, 1.5 uA standby • Medical, Automotive & Industrial High Performance CPU, Low Power • Up to 165 DMIPS, 90nm process • 500uA/MHz, 2.5 uA standby • Ethernet, CAN, USB, Motor Control, TFT Display High Performance CPU, FPU, DSC • Legacy Cores • Next-generation migration to RX R32C H8S H8SX M16C General Purpose Ultra Low Power Embedded Security • Up to 25 DMIPS, 150nm process • 190 uA/MHz, 0.3uA standby • Application-specific integration • Up to 10 DMIPS, 130nm process • 350 uA/MHz, 1uA standby • Capacitive touch • Up to 25 DMIPS, 180, 90nm process • 1mA/MHz, 100uA standby • Crypto engine, Hardware security 6

  7. The Cloud Innovation Scale TV Medical Aggregation Box Pedometer Remote Control BP Monitor

  8. Renesas’ Capacitive Touch Solution Renesas now provides an advanced sensor scanning unit (SCU) implemented in hardware along with a complete set of tools for capacitive touch solutions. The FREE tools available include: Tuning Software Sensor API Touch Library Example Code Apple’s Magic Trackpad

  9. Agenda What can I do with the Renesas capacitive touch solution? How do I actually code up an application with what Renesas provides? How to dance like MC Hammer!

  10. Agenda

  11. Agenda What can I do with the Renesas capacitive touch solution? How do I actually code up an application with what Renesas provides? How to dance like MC Hammer! Q&A

  12. Key Takeaways Learn about typical capacitive touch interfaces and when to use them Understand how to handle keys, sliders, and wheels within your application code Become familiar with the Renesas touch library model and its intuitive API

  13. Capacitive Touch Interfaces Sliders Switches Wheels Gestures

  14. Capacitive Touch Interfaces

  15. Distinct software layers for easy management Firmware available in source format Optimized driver tightly coupled to SCU Complete Sensor API to enable customization Support for Wheel, Slider, Switch, and Matrix configurations Renesas Software Architecture

  16. Overview Of Using The Touch Library

  17. Overview Of Using The Touch Library

  18. The Primitives • Functions • Touch_Init • Touch_Register_Sensor • Touch_Unregister_Sensor • Touch_Start • Touch_Handler • Data Types • Sensor_Type_t • Sensor_State_t • Orientation_t • Polarity_t • Direction_t • Sensor_Params_t • Sensor_t

  19. Let’s Start Out Simple: The Switch Switch Types Toggle Momentary Repeat Proximity Sensor_Params_tSwitchParams; /* Initialization code */ SwitchParams.id=0; SwitchParams.type=TOGGLE_SWITCH; SwitchParams.channel=7; SwitchParams.debounce=TRUE; SwitchParams.callback=Switch_Event Touch_Register_Sensor(&SwitchParams);

  20. Let’s Start Out Simple: The Switch intSwitch_Event(Sensor_t*Switch) { if(Switch->state==ACTIVE){ Led_State(LED_7,ON); }else{ Led_State(LED_7,OFF); } }

  21. The Electric Slide Sensor_Params_tSliderParams; /* Initialization code */ SliderParams.id=1; SliderParams.type=SLIDER; SliderParams.channel=1; SliderParams.count=6; SliderParams.resolution=2; SliderParams.orientation=EAST_WEST; SliderParams.callback=Slider_Event Touch_Register_Sensor(&SliderParams);

  22. The Electric Slide intSlider_Event(Sensor_t*Slider) { if(Slider->state==TOUCHED){ if(Slider->position<=8){ /* … */ }elseif(Slider->position<=16){ /* … */ } /* … */ } }

  23. The Wheels On The Bus Go… Sensor_Params_tWheelParams; /* Initialization code */ WheelParams.id=2; WheelParams.type=WHEEL; WheelParams.channel=10; WheelParams.count=4; WheelParams.resolution=4; WheelParams.callback=Wheel_Event Touch_Register_Sensor(&WheelParams);

  24. Putting It All Together • What type of sensors? • How many channels required? • Single chip or multi-chip design? • Multi-touch support? • Sensor rejection?

  25. But Wait…

  26. Questions?

  27. The Cloud Innovation Scale TV Medical Aggregation Box Pedometer Remote Control BP Monitor

  28. Thank You!

  29. Where To Get Stuff

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