C8051F990 Ultra Low-Power Capacitive Touch Sensing and Touch Slider Evaluation Kit


The C8051F99x MCUs combine the industry-leading low power technology of the C8051F99x family with the fast and accurate capacitive touch sensing features of the patent-pending capacitance to digital converter (CDC). Silicon Labs' F990SliderEK Evaluation Kit is a battery powered capacitive sensing slider board that can be used to demonstrate several key features of the C8051F99x ultra low power microcontroller:

  • Wake-on-slide – No off switch! Ultra low power wake-on-touch.
  • Slider control – Allows multiple capacitive sensing pads to be bound together to form a slider control.
  • Gesture recognition – Events enable the ability to detect gestures, such as a “pinch”, on the slider. In this system, the “pinch” gesture is used to switch amongst different modes: slider demo, battery meter and LED dimmer.
  • Battery meter – Using the C8051F990’s 12-bit ADC, the system is able to measure the battery voltage and displays remaining voltage level.
  • LED dimmer – The system dynamically reduces LED power consumption by driving the LEDs with a PWM signal. Taking advantage of the fast 2 μs wake-up time, the MCU can efficiently wake up from sleep, adjust the state of the LED and go back to sleep.
  • Tiny layout with few discrete components – Save cost of crystal, resistors, capacitors and board space.

F990SliderEK Features

The F990SliderEK includes:

  • F990Slider-EB demonstration board with battery
  • F990SliderEK Quick Start Guide

The F990SliderEK Download Package includes:

  • Quick Start Guide
  • User’s Guide
  • Schematic
  • Printed-circuit board files
  • Firmware

F990SliderEK Evaluation Kit Resources

F990SliderEK Quick Start Guide

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C8051F990 Slider Evaluation Kit User's Guide

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Appliction Note 358

Optimizing Low Power Operation of the C8051F9xx

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Appliction Note 359

Debugging Techniques for the C8051F9xx

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Appliction Note 367

Understanding Capacitive Sensing Signal to Noise Ratios

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Appliction Note 376

Effects of ESD Protection Devices on Capacitive Sensing Performance

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Appliction Note 431

C8051F93x-C8051F90x Software Porting Guide

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Appliction Note 447

Printed Circuit Design Notes for Capacitive Sensing with the CS0 Module

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F990SliderEK Software

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