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UG132: CPT007B SLEXP8007A Kit User's
Guide
The CPT007 Capacitive Sense Evaluation Board is an excellent
starting point to get familiar with Capacitive Sense touch pads.
The device serves as a user input peripheral for application development. The device
can be configured for different touch sense capabilities and also contains easy access
breakout pads and other peripherals for user feedback.
The kit includes the following:
• CPT007B Capacitive Sense Evaluation
Board
• 1 x acrylic overlay
silabs.com | Smart. Connected. Energy-friendly.
• Getting Started card
• 1 x mini USB cable
KEY FEATURES
• CPT007B Capacitive Sense device with
GPIO
• 20-pin expansion header for connection
with a Silicon Labs Starter Kit (EFM8 or
EFM32)
• Breakout test points for easy access to
touch pads
• Power sources include USB and EXT
Header
• 7 Capacitive Sense touch pads, 7 LEDs
• 1 Buzzer
Rev. 0.1
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Table of Contents
Related Manuals for Silicon Laboratories CPT007B
Summary of Contents for Silicon Laboratories CPT007B
- Page 1 The CPT007 Capacitive Sense Evaluation Board is an excellent KEY FEATURES starting point to get familiar with Capacitive Sense touch pads. • CPT007B Capacitive Sense device with The device serves as a user input peripheral for application development. The device GPIO can be configured for different touch sense capabilities and also contains easy access •...
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Page 2: Getting Started
The Simplicity Studio software package contains all the tools, drivers, software examples, and documentation needed to use the CPT007B Capacitive Sense Evaluation Board. The board comes preconfigured for a Touch Demo for use with the acrylic overlay. The demo enables the board to recognize touch events and touch release events. Every time a touch is sensed, the paired digital output pin will go high, the corresponding LED will light up, and the buzzer will sound. -
Page 3: Kit Block Diagram
UG132: CPT007B SLEXP8007A Kit User's Guide Kit Block Diagram 2. Kit Block Diagram An overview of the CPT007B Capacitive Sense Evaluation Board is shown in the figure below. CS05 CS03 CS01 CS06 CS04 CS02 CS00 EXP Header USB Mini-B Connector... -
Page 4: Kit Hardware Layout
Figure 3.1. CPT007B SLEXP8007A Hardware Layout The CPT007B device on the kit can be connected to external peripherals other than the assigned pin functions using the vias on the board. The table below shows all of the external connections to the fixed function CPT007B device. - Page 5 UG132: CPT007B SLEXP8007A Kit User's Guide Kit Hardware Layout CPT007B Pin Assigned Function Expansion Port Connection (EXP) OUT03 Output corresponding to CS03 and LED EXP15 OUT3 OUT04 Output corresponding to CS04 and LED EXP5 OUT4 OUT05 Output corresponding to CS05 and LED...
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Page 6: Power And Operation
To operate in this mode, apply power using the USB connector or an external supply. The board can operate on its own to demonstrate and test the board's touch features and functionalities. The CPT007B SLEXP8007A features configurable options such as touch characteristics, output characteristics, and user feedback peripherals. The device's fea- tures can be configured in Simplicity Studio using [Xpress Configurator], and the capacitive sense data can be viewed in the [Capaci- tive Sense Profiler]. - Page 7 For more details on the starter kit, see the corresponding starter kit's user guide. Note: Not all EFM32 starter kits support this expansion board. See the available demos in Simplicity Studio for more information. Figure 4.2. CPT007B SLEXP8007A Connected to an Example EFM8SB2 STK silabs.com | Smart. Connected. Energy-friendly.
- Page 8 5.1 Capacitive Sense Touch Pads The kit has 7 capacitive sense touch pads. The touch pads are connected in order to pins CS00 - CS06 of the CPT007B SLEXP8007A. After the touch pad inputs have been processed by the touch qualification engine, the CPT007B SLEXP8007A will output the result through GPIO.
- Page 9 The capacitive sense input traces can be accessed through the vertically aligned vias located in middle of the board on the left of the pads. All 7 CPT007B capacitive sensing touch pads are bound to each via. Furthermore, above the buzzer, there are two breakout pads for VMCU and GND to measure the active current of the board using an in-circuit ammeter.
- Page 10 UG132: CPT007B SLEXP8007A Kit User's Guide Connectors 6.2 Expansion Header On the left hand side of the board is a female expansion header to connect to a Silicon Labs EFM8 or EFM32 Starter Kit (STK). The connecter contains a number of output and communication pins that can be used to communicate with the MCU on the STK. The re- sults from the touch qualification engine are routed out to these pins.
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Page 11: Simplicity Studio
UG132: CPT007B SLEXP8007A Kit User's Guide Simplicity Studio 7. Simplicity Studio Figure 7.1. Simplicity Studio silabs.com | Smart. Connected. Energy-friendly. Rev. 0.1 | 10... - Page 12 Simplicity Studio 7.1 Xpress Configurator [Xpress Configurator] provides the necessary tools to modify the CPT007B SLEXP8007A's functionalities for a custom application in an easy-to-use GUI. To use [Xpress Configurator] within Simplicity Studio: 1. Provide power to the board by connecting the USB connector to the PC using the provided USB cable.
- Page 13 1. Provide power to the board by connecting the USB connector to the PC using the provided USB cable. 2. Click the [Refresh detected hardware] button and select the [CPT007B] kit under [Detected Hardware]. 3. Go to [Tools] and select the [Capacitive Sense Profiler] tile.
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Page 14: Device And Peripherals
8. Advanced Energy Monitor When the CPT007B Capacitive Sense Evaluation Board is connected to a Silicon Labs STK, the STK's AEM (Advanced Energy Moni- tor) hardware also measures the CPT007B power consumption using the VMCU connection on the EXP header. By using the [Energy Profiler] in Simplicity Studio, current consumption and voltage can be measured in real time. -
Page 15: Schematics, Assembly Drawings, And Bom
9. Schematics, Assembly Drawings, and BOM The schematics, assembly drawings and bill of materials (BOM) for the CPT007B Capacitive Sense Evaluation Board are available through Simplicity Studio when the kit documentation package has been installed. To access these documents, click the [Kit Docu- mentation] tile after selecting the device in the left pane. - Page 16 The products must not be used within any Life Support System without the specific written consent of Silicon Laboratories. A "Life Support System" is any product or system intended to support or sustain life and/or health, which, if it fails, can be reasonably expected to result in significant personal injury or death.
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