Atmel QTouch Library User Guide

6.4.6 QTouch Library ATtiny20 Example projects ......................................................................... 1736.4.7 QTouch Library ATtiny20 code and data memory requirements .......................................... 173Table 19 QTouch Library for ATtiny20 Memory requirements ...................................... 1746.5 QTouch Library for ATtiny40 device.............................................................................. 1746.5.1 Salient Features of QTouch Library for ATtiny40 ................................................................. 1746.5.1.1 QTouch method sensor ...................................................................................... 1746.5.2 Compiler tool chain support for ATtiny40 ............................................................................. 175Table 20 Compiler tool chains support for ATtiny40 QTouch Library ........................... 1756.5.3 Overview of QTouch Library for ATtiny40 ............................................................................ 175Figure 51 Schematic overview of QTouch on Tiny40 ................................................... 1766.5.4 API Flow diagram for ATtiny40 ............................................................................................. 176Figure 52 QTouch method for Tiny40 API Flow diagram ............................................. 1776.5.5 QTouch Library configuration parameters for ATtiny40 ........................................................ 178Table 21 QTouch Library for ATtiny40 Configuration parameters ................................ 1786.5.6 QTouch Library ATtiny40 Example projects ......................................................................... 1786.5.7 QTouch Library ATtiny40 code and data memory requirements .......................................... 179Table 22 QTouch Library for ATtiny40 Memory requirements ...................................... 1797 Generic QTouch Libraries for 2K Devices .............................................. 1797.1 Introduction .................................................................................................................... 1797.2 Devices supported ........................................................................................................ 1807.3 Salient Features of QTouch Library for 2K Devices...................................................... 1807.4 Library Variants ............................................................................................................. 1807.5 QTouch API for 2K Devices and Usage ........................................................................ 1807.5.1 touch_api_2kdevice.h - public header file ............................................................................ 1807.5.2 Sequence of Operations and Using the API ......................................................................... 1817.5.2.1 Channel Numbering ........................................................................................... 1817.5.2.1.1 Channel numbering when routing SNS and SNSK pins to different ports .... 1817.5.2.1.2 Channel numbering when routing SNS and SNSK pins to the same port .... 1817.5.2.2 Rules For Configuring SNS and SNSK masks for 2K Devices .......................... 1827.5.2.2.1 Configuring SNS and SNSK masks in case of Interport: .............................. 1827.5.2.2.2 Configuring SNS and SNSK masks in case of Intraport: .............................. 1827.5.3 Integrating QTouch libraries for 2K Devices in your application ........................................... 1837.6 MISRA Compliance Report ........................................................................................... 1847.6.1 What is covered ................................................................................................................... 1847.6.2 Target Environment .............................................................................................................. 1847.6.3 Deviations from MISRA C Standards ................................................................................... 1847.6.3.1 QTouch acquisition method libraries for 2K devices .......................................... 1848 Revision History ........................................................................................ 185Disclaimer ........................................................................................................ 18788207K-AT42-09/11