Texas Instruments FDC2214 User Manual
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Texas Instruments FDC2214 User Manual

Proximity and capacitive touch evm
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FDC2214 Proximity and Capacitive Touch EVM User's
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Schematic
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FDC2214 Register Configuration
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All trademarks are the property of their respective owners.
SNOU139 - October 2015
Submit Documentation Feedback
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Copyright © 2015, Texas Instruments Incorporated
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List of Figures
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List of Tables
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FDC2214 Proximity and Capacitive Touch EVM User's Guide
User's Guide
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  • Page 1: Table Of Contents

    JTAG Connector Pin Assignment ..............Proximity and Capacitive Touch Sensor Properties All trademarks are the property of their respective owners. SNOU139 – October 2015 FDC2214 Proximity and Capacitive Touch EVM User’s Guide Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated...

  • Page 2: Overview

    The firmware included processes the data from one proximity sensor and two capacitive touch buttons via the FDC2214 to determine whether an object is in the intended sensing area. All of the processing is done on the MSP430 allowing the board to be a standalone system. Dedicated colored LEDs light up once the device detects a target in close proximity to the board or detects a press on the buttons.

  • Page 3: Hardware

    SNOU139 – October 2015 FDC2214 Proximity and Capacitive Touch EVM User’s Guide Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated...

  • Page 4: Proximity Sensor

    Figure 4 shows a plot of the sensing distance the FDC2214 can achieve with a given sensor size area in a grounded system. A solid square sensor was used to collect the data in...

  • Page 5: Reset Button

    3 GPIO pinouts on a 3 pin 100 mil header Debug and prototype Allows for current measurements for low power Pull-up resistor on the supply pin of the FDC2214 (LP) applications Pull-up resistor on the supply pin of the external...

  • Page 6: Additional Debugging Features

    MSP430 to use this functionality. Firmware FDC2214 Register Configuration The full set of register contents used to configure the FDC2214 for this application can be found in Table Table 2. FDC2214 Register Configuration...

  • Page 7: Programming

    1fF so it is recommended to fix the position of the board or not move the board during evaluation to limit any false detection. SNOU139 – October 2015 FDC2214 Proximity and Capacitive Touch EVM User’s Guide Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated...

  • Page 8: Operation

    The yellow waveform corresponds to the proximity sensor while the green and magenta waveform corresponds to the capacitive touch button 1 and 2. The FDC2214 may be configured for current overdrive at the beginning of a conversion cycle, as illustrated in Figure 8.

  • Page 9: Proximity Startup Waveform (Yellow), Cap Touch Button 1/2 Startup Waveforms (Green, Magenta)

    Figure 8. Proximity Startup Waveform (Yellow), Cap Touch Button 1/2 Startup Waveforms (Green, Magenta) Figure 9. Sensor Multiplexing – Proximity (Yellow), Cap Touch Button 1 and 2 (Green, Magenta) SNOU139 – October 2015 FDC2214 Proximity and Capacitive Touch EVM User’s Guide Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated...

  • Page 10: Board Layout

    Board Layout Figure 10. Composite Top and Bottom Layer Plot (Viewed From the Top) Figure 11. Top Layer FDC2214 Proximity and Capacitive Touch EVM User’s Guide SNOU139 – October 2015 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated...

  • Page 11: Midlayer 1 (Power Plane)

    Board Layout www.ti.com Figure 12. Midlayer 1 (Power Plane) Figure 13. Midlayer 2 (GND Plane) SNOU139 – October 2015 FDC2214 Proximity and Capacitive Touch EVM User’s Guide Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated...

  • Page 12: Bottom Layer

    Board Layout www.ti.com Figure 14. Bottom Layer FDC2214 Proximity and Capacitive Touch EVM User’s Guide SNOU139 – October 2015 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated...

  • Page 13: Schematic

    PCB Rev: Assembly Note Provide H1, H2, H3, H4, H5, H6, H7, H8 as loose par ts. Figure 15. Schematic SNOU139 – October 2015 FDC2214 Proximity and Capacitive Touch EVM User’s Guide Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated...
  • Page 14 STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein. Acceptance of the EVM is expressly subject to the following terms and conditions.
  • Page 15 FCC Interference Statement for Class B EVM devices NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
  • Page 16 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page SPACER EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.
  • Page 17 Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief in any United States or foreign court. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2015, Texas Instruments Incorporated...
  • Page 18 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.
  • Page 19 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Texas Instruments FDC2214PROXSEN-EVM...

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