Silicon Laboratories CPT007B User Manual Download Page 1

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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:

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

• CPT007B Capacitive Sense Evaluation

Board

• 1 x acrylic overlay

• Getting Started card
• 1 x mini USB cable

silabs.com

| Smart. Connected. Energy-friendly.

Rev. 0.1

Summary of Contents for CPT007B

Page 1: ...easy access breakout pads and other peripherals for user feedback The kit includes the following 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 CPT007B Capacitive Sense ...

Page 2: ...ognize 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 After downloading the latest version of Simplicity Studio and installing the software 1 The auto detect feature in Simplicity Studio can cause a CPT device to miss touches First disable automatic detection by clicking the...

Page 3: ...elow GPIO CS01 CS00 CS02 CS03 CS04 CS06 CS05 USB Mini B Connector Device Configuration CPT007B GPIO Capacitive Sense Device EXP Header Buzzer and LEDs Figure 2 1 CPT007B SLEXP8007A Block Diagram UG132 CPT007B SLEXP8007A Kit User s Guide Kit Block Diagram silabs com Smart Connected Energy friendly Rev 0 1 2 ...

Page 4: ...tions to the fixed function CPT007B device Table 3 1 CPT007B Device Connections CPT007B Pin Assigned Function Expansion Port Connection EXP CS00 Capacitive Sense Pad CS00 CS01 Capacitive Sense Pad CS01 CS02 Capacitive Sense Pad CS02 CS03 Capacitive Sense Pad CS03 CS04 Capacitive Sense Pad CS04 CS05 Capacitive Sense Pad CS05 CS06 Capacitive Sense Pad CS06 BUZZER Piezo Buzzer OUT00 Output correspond...

Page 5: ... corresponding to CS04 and LED OUT4 EXP5 OUT05 Output corresponding to CS05 and LED OUT5 EXP7 OUT06 Output corresponding to CS06 and LED OUT6 EXP9 RSTb Config Clk Configuration Clock Config Data Configuration Data UG132 CPT007B SLEXP8007A Kit User s Guide Kit Hardware Layout silabs com Smart Connected Energy friendly Rev 0 1 4 ...

Page 6: ...dalone In standalone mode the CPT007B SLEXP8007A on the CPT007 Capacitive Sense Evaluation Board is designed to showcase and test the board s features or act as a breakout board for any application 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 SLEX...

Page 7: ...tion pins To see how the board works in conjunction with the MCU starter kit go to the starter kit s Demos under Tools in Simplicity Studio and run CPT007B Demo 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...

Page 8: ...ferent pin polarities and drive strength See the CPT007B SLEXP8007A Data Sheet for more detailed information on the different configurations CS00 CPT007B Device CS01 CS02 CS03 CS04 CS05 CS06 CS00 CS01 CS02 CS05 CS03 CS04 CS06 CS01 CS00 CS02 CS03 CS04 CS06 CS05 Figure 5 1 Capacitive Sense Touch Pads 5 2 LEDs and Buzzer The device features LEDs and a buzzer to provide feedback to the user when using...

Page 9: ...eakout pads for VMCU and GND to measure the active current of the board using an in circuit ammeter A 2 54 mm pitch pin header can be soldered in for easy access to these pins Note In order for the capacitive sense pins to be connected properly to your application or power to be measured correctly the 0 ohm resistors must be removed The 0 ohm resistor for a channel can be found next to the corresp...

Page 10: ...ils are also impor ted The figure below shows the pin assignment of the expansion header The CPT007B SLEXP8007A outputs using GPIO The pin assignment of the expansion header and the peripheral function are listed below in the figure and table OUT00 OUT01 OUT02 OUT03 OUT06 OUT05 OUT04 NC NC NC NC NC NC NC CPT Pin Figure 6 2 Expansion Header Table 6 1 Pins available on Expansion Header CPT007B pin E...

Page 11: ...7 Simplicity Studio Figure 7 1 Simplicity Studio UG132 CPT007B SLEXP8007A Kit User s Guide Simplicity Studio silabs com Smart Connected Energy friendly Rev 0 1 10 ...

Page 12: ... Detected Hardware 3 Go to Tools and click the Xpress Configurator tile 4 Select the desired configuration for the engine and peripherals More information about each of the options in Xpress Configurator is available in AN0829 Capacitive Sensing Library Configuration Guide Application notes can be accessed within Simplicity Studio using the Application Notes tile or on the Silicon Labs website www...

Page 13: ...se Profiler tile 4 In the Control Panel click Use Device Once the board is connected touch and release any of the capacitive sensing touch peripherals on the board to view the raw and pro cessed data The profiler can view the data as Raw Data Noise and Buttons The Buttons view is particularly useful since it shows the state of the capacitive sense touch pads as either on or off More information ab...

Page 14: ...rent consumption and voltage can be measured in real time More details about AEM and its operation can be found in the STK User Guide Note that AEM will measure the current for all circuitry connected to VMCU including the STK MCU and the CPT device EFM STK Board EFM MCU AEM Hardware CPT Device and Peripherals CPT EXP Board Figure 8 1 Measuring CPT007B SLEXP8007A Current Using AEM UG132 CPT007B SL...

Page 15: ...ion 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 UG132 CPT007B SLEXP8007A Kit User s Guide Schematics Assembly Drawings and BOM silabs com Smart Connected Energy friendly Rev 0 1 14 ...

Page 16: ...or health which if it fails can be reasonably expected to result in significant personal injury or death Silicon Laboratories products are generally not intended for military applications Silicon Laboratories products shall under no circumstances be used in weapons of mass destruction including but not limited to nuclear biological or chemical weapons or missiles capable of delivering such weapons...

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