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UG294: CPT213B SLEXP8019A Kit User's
Guide
The CPT213B 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:
• CPT213B Capacitive Sense Evaluation
Board
• 1 x acrylic overlay
silabs.com | Building a more connected world.
• Getting Started card
• 1 x mini USB cable
KEY FEATURES
• CPT213B Capacitive Sense device with
I2C
• 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
• 13 Capacitive Sense touch pads
Rev. 0.1
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Summary of Contents for Silicon Laboratories CPT213B
- Page 1 UG294: CPT213B SLEXP8019A Kit User's Guide The CPT213B Capacitive Sense Evaluation Board is an excellent starting point to get familiar with Capacitive Sense touch pads. KEY FEATURES • CPT213B Capacitive Sense device with 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 •...
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Page 2: Getting Started
After downloading the latest version of Simplicity Studio and installing the software: 1. In the [Launcher], select [CPT213B] in [Device] pane. On the board, a successful USB connection is established when the LED next to the USB connector turns on. -
Page 3: Device Configuration
UG294: CPT213B SLEXP8019A Kit User's Guide Kit Block Diagram 2. Kit Block Diagram An overview of the CPT213B Capacitive Sense Evaluation Board is shown in the figure below. CS00 CS01 CS02 CS03 CS04 CS05 CS06 CS07 CS08 CS09 CS10 CS11... -
Page 4: Kit Hardware Layout
Figure 3.1. CPT213B SLEXP8019A Hardware Layout The CPT213B 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 CPT213B device. - Page 5 UG294: CPT213B SLEXP8019A Kit User's Guide Kit Hardware Layout CPT213B Pin Assigned Function Expansion Port Connection (EXP) EB_SDA Event Buffer I2C SDA EXP16 EB_INT Event Buffer Interrupt Pin EXP6 RSTb / Config Clk Configuration Clock EXP10 Config Data Configuration Data —...
- Page 6 The board can operate on its own to demonstrate and test the board's touch features and functionalities. The CPT213B SLEXP8019A 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 4.3 Connected to the Expansion Header The CPT213B Capacitive Sense Evaluation Board is designed to quickly attach to any EFM32 and EFM8 MCU starter kit and jump- start the development of capacitive sense capable applications. Attach the CPT213B Capacitive Sense Evaluation Board to the STK through the expansion header to connect the power and communication pins.
- Page 8 5.1 Capacitive Sense Touch Pads The kit has 13 capacitive sense touch pads. The touch pads are connected in order to pins CS00 - CS12 of the CPT213B SLEXP8019A. After the touch pad inputs have been processed by the touch qualification engine, the CPT213B SLEXP8019A will out- put the result through I2C.
- 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 touch pads. All 13 CPT213B capacitive sensing touch pads are bound to each via. At the bottom left corner of the board, there are two test points for VMCU labeled "ST1" to measure the active current of the board using an in-circuit ammeter.
- Page 10 UG294: CPT213B SLEXP8019A 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
UG294: CPT213B SLEXP8019A Kit User's Guide Simplicity Studio 7. Simplicity Studio Figure 7.1. Simplicity Studio silabs.com | Building a more connected world. Rev. 0.1 | 11... - Page 12 Simplicity Studio 7.1 Xpress Configurator [Xpress Configurator] provides the necessary tools to modify the CPT213B SLEXP8019A'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. select the [CPT213B] kit in the [Device] pane. 3. Go to [Compatible Tools] and select the [Capacitive Sense Profiler] tile.
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Page 14: Device And Peripherals
When the CPT213B Capacitive Sense Evaluation Board is connected to a Silicon Labs STK, the STK's Advanced Energy Monitor (AEM) hardware also measures the CPT213B power consumption using the VMCU connection on the EXP header. By using the [Ener- gy Profiler] in Simplicity Studio, current consumption and voltage can be measured in real time. -
Page 15: Schematics, Assembly Drawings, And Bom
9.1 Board Files The schematics, assembly drawings and bill of materials (BOM) for the CPT213B 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 Trademark Information Silicon Laboratories Inc.® , Silicon Laboratories®, Silicon Labs®, SiLabs® and the Silicon Labs logo®, Bluegiga®, Bluegiga Logo®, Clockbuilder®, CMEMS®, DSPLL®, EFM®, EFM32®, EFR, Ember®, Energy Micro, Energy Micro logo and combinations thereof, "the world’s most energy friendly microcontrollers", Ember®, EZLink®, EZRadio®, EZRadioPRO®, Gecko®, ISOmodem®, Micrium, Precision32®, ProSLIC®, Simplicity Studio®, SiPHY®, Telegesis, the Telegesis Logo®, USBXpress®, Zentri and others are trademarks or registered...
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