Design DocumentNxp

NXP Touch Development Guide for Kinetis KE1x MCUs

Guide for NXP Touch software and TSI v5 hardware on Kinetis KE1x MCUs, featuring high EMC immunity, liquid tolerance, and support for thick overlays in touch applications.

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Overview

This design document provides a comprehensive guide for implementing capacitive touch sensing using the NXP Touch software library and Kinetis KE1x microcontrollers. It details the TSI (Touch Sensing Input) v5 hardware peripheral, which utilizes charge-transfer principles to support both self-capacitance and mutual-capacitance modes for up to 6x6 matrices. The document covers software architecture, integration with the MCUXpresso SDK, and real-time debugging and visualization via the FreeMASTER tool. Key features highlighted include IEC61000-4-6 standard compliance for EMC performance, robust liquid tolerance (water, oil, steam), and support for overlays up to 10mm thick. Step-by-step instructions are provided for running touch sensing demos on the FRDM-KE15Z evaluation board.

Use Cases

Human-machine interfaces (HMI) for home appliances
Industrial control panels requiring high EMC immunity and liquid resistance
Touch interfaces operating through thick glass or plastic overlays
RTOS-based touch application development
Low-power proximity and touch wake-up sensing

Topics

NXP KE15Z

Kinetis KE1x

TSI v5

capacitive touch

FreeMASTER

MCUXpresso

IEC61000-4-6

self-capacitance

mutual-capacitance

liquid tolerance

FRDM-TOUCH

NXP KE1xF

Referenced Parts

KE15Z

NXP

Follow the steps below to build and download the SDK for FRDM-KE15z

KE1x

NXP

NXP offers the latest TSI v5 HW peripheral available on Kinetis KE1x devices based on charge-transfer physical principle.

KE1xF

NXP

Kinetis KE1xF and KE1xZ Families

KE1xZ

NXP

Kinetis KE1xF and KE1xZ Families

TouchKE15Z.pmp

NXP

• Drag the NXPTouchKE15Z.pmp file onto the FreeMASTER window

KE15Z	NXP	Follow the steps below to build and download the SDK for FRDM-KE15z
KE1x	NXP	NXP offers the latest TSI v5 HW peripheral available on Kinetis KE1x devices based on charge-transfer physical principle.
KE1xF	NXP	Kinetis KE1xF and KE1xZ Families
KE1xZ	NXP	Kinetis KE1xF and KE1xZ Families
TouchKE15Z.pmp	NXP	• Drag the NXPTouchKE15Z.pmp file onto the FreeMASTER window