Atmel QTouch Library User Guide

The QTouch method acquisition using the CAT module requires one Peripheral DMA channelthat must be provided by the application.QTouch Group A/B method Channel and Sensor numbering for UC3LSNS2SNSK2channel 0ATMELAT32UC3LSNS3SNSK3SNS5SNSK5channel 1channel 2Sensor 0SNS9SNSK9channel 3Sensor 1Figure 41 QTouch method Channel/Sensor numberingThe above Figure represents an example 4 Channel QTouch sensor arrangement along with thechannel numbers. The Channel numbering starts with the lowest SNS-SNSK QTouch methodpair number (SNS2-SNSK2 being the least in this case) and increases as the SNS-SNSK pairnumber increases. Similarly the Sensor numbering starts with Sensor 0. The Channel numbersignifies the order in which the QTouch Library stores the acquisition data in the memory.SNS2SNSK2QTouch Grp A Channel 0SNS3SNSK3QTouch Grp A Channel 1QTouch Grp ASensor 0ATMELAT32UC3LSNS5SNSK5SNS6SNSK6SNS7SNSK7SNS9SNSK9QTouch Grp A Channel 2QTouch Grp B Channel 0QTouch Grp A Channel 3QTouch Grp B Channel 1QTouch Grp BSensor 0QTouch Grp ASensor 1QTouch Grp BSensor 11288207K-AT42-09/11