Freescale Expands Xtrinsic Touch-Sensing Software Portfolio for Next-Generation Human-Machine Interfaces

Capacitive touch-sensing software 3.0 provides feature-rich updates and robust microcontroller functionality without incremental cost

BENGALURU, India--(BUSINESS WIRE)--Aug. 24, 2012-- Freescale Semiconductor (NYSE: FSL) is extending its Xtrinsic touch-sensing software (TSS) portfolio with a robust, flexible solution that provides added microcontroller (MCU) functionality without increasing system cost. New features include water tolerance, noise detection* and a touch-detection algorithm for reduced false touches under electrical noise.

TSS 3.0 is the latest addition to Freescale’s growing portfolio of touch-sensing software for button replacement in industrial, medical, consumer and auto infotainment applications. Building on the successful TSS library, it offers a comprehensive solution with complementary licensed software and cost-effective development tools. Simplified user interfaces mean customers are able to develop an application within minutes using a broad range of tools and demonstration software, with minimal cost and effort.

“The latest release of our touch-sensing software comes with feature-rich updates that provide robust functionality for more of Freescale’s microcontrollers,” said Geoff Lees, vice president and general manager of Freescale’s Industrial & Multi-Market MCU business. “Cost-effective integration allows customers to use TSS 3.0 to transform their designs with next-generation human-machine interfaces, without increasing system cost.”

Reliable touch detection provides extremely high sensitivity with very low capacitance measurement resolution, offering a highly accurate and robust solution. With TSS 3.0, the user can define the sensitivity level, or auto-sensitivity calibration (ASC) will do it based on noise level analysis. TSS 3.0 is immune to droplets of water and able to distinguish touch on the electrodes even when the electrodes are covered with a water film.

In addition, TSS 3.0 works with Freescale’s touch-sensing input (TSI) module, which is embedded into several hardware platforms, to provide better touch detection. The library provides commonly used touch-sensing decoding structures, such as keypad, rotary and slider, to allow upgrades from mechanical to touch-activated interfaces.

Since introducing the first version of Xtrinsic touch-sensing software in 2009, Freescale continues to build its TSS portfolio, which now supports hundreds of Freescale MCUs including TSI-enabled HCS08 devices, ColdFire+ MCUs and Kinetis MCU families built on the ARM® Cortex™-M4 processor.

Xtrinsic touch-sensing software transforms any standard MCU into a touch sensor with the ability to manage multiple configurations of touch pads, sliders, rotary positions and mechanical keys, all while maintaining standard MCU functionality. Touch sensing helps increase product lifetimes by eliminating mechanical wear and tear associated with buttons and switches, while minimizing system cost by saving an extra IC in the design.


For more information about Freescale’s touch-sensing software library and tools and to download TSS 3.0, visit

The TWRPITSS-SLIDERS kit is available for a suggested resale price of $79 (USD) and the TWRPITSS-SHIELD kit is available for a suggested resale price of $69 (USD) as well as development kits for Kinetis and ColdFire+ MCUs using Freescale’s proprietary FreeMASTER real-time debug monitor and data visualization tool. TSS directly supports the FreeMASTER GUI, which enables customers to see what is inside their MCU and debug, adjust or calibrate the TSS algorithm accordingly.