Ultra Low-power Capacitive Touch Sensing and the QuickSense™ Touch Slider Evaluation Kit

F990SliderEK

C8051F990 Ultra low-power capacitive touch sensing and QuickSense™ Touch Slider Evaluation Kit

The QuickSense™ C8051F99x MCUs combine the industry-leading low power technology of the C8051F9xx family with the fast and accurate capacitive touch sensing features of the patent-pending QuickSense 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.
  • QuickSense slider control – Allows multiple capacitive sensing pads to be bound together to form a slider control. The QuickSense API performs all required calculations and notifies the application software of the finger position on the slider.
  • Gesture recognition – QuickSense 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 Capacitive Touch Slider Evaluation Kit Click to Buy

 

The F990SliderEK includes the following items:

 

The F990SliderEK Download Package includes the following items:


Additional F990SliderEK resources:

  • Optimizing Low Power Operation of the C8051F9xx (AN358)
  • Debugging Techniques for the C8051F9xx (AN359)
  • QuickSense Firmware API (AN366)
  • Understanding Capacitive Sensing Signal to Noise Ratios (AN367)
  • Effects of ESD Protection Devices on Capacitive Sensing Performance (AN376)
  • Baselining in the Capacitive Sensing Firmware API (AN418)
  • C8051F93x-C8051F90x Software Porting Guide (AN431)
  • Printed Circuit Design Notes for Capacitive Sensing with the CS0 Module (AN447)
  • Low Power Capacitive Sensing (AN507)
  • QuickSense Development Studio

 

 

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