Slider implementation using the TouchXpress devices

by <a href="http://community.silabs.com/t5/Welcome-and-Announcements/Community-Ranking-System-and-Recognition-Program/m-p/140490#U140490"><font color="#000000"><font size="2">Hero Employee</font></font> </a> cgiga on ‎06-06-2016 07:29 PM - edited on ‎08-02-2017 02:25 PM by Administrator Siliconlabs

Question

Can I implement a slider using the TouchXpress CPT devices?  

Answer

The TouchXpress CPT112S device provides the capability to implement capacitive sense sliders (linear only).  Up to 12 slider segments are supported using the CPT112S. If Wake on Prox is going to be supported, then the CPT112S can support 11 slider segments.  Please check updated devices and revisions for additional slider support.

 

The length of the slider is dependent on the layout of the pads.  In order to implement the slider functionality, be sure to provide enough sensitivity and overlap between the pads in order for the slider algorithm to determine valid transition points along the slider. Please see AN447 for a detailed description of the pad layout requirements. Application notes can be found on the Silicon Labs website (www.silabs.com/interface-appnotes).