Cypress Perform

Home > Support & Community
support.cypress.com     Bookmark and Share
Support & Community

Knowledge Base Article



Configuring Unused Buttons - KBA82818

Last Updated: 05/07/2013
Version: **
Question: I have a PCB layout that is used for multiple projects, however, a few CapSense buttons are not used in every project. In these projects, the unused buttons are on the PCB but they are not defined on the overlay artwork. What is the right pin configuration for these buttons in PSoC Designer?

Answer: The GPIO setting for the unused button inputs need to be configured as "Strong" and driven low. These pins should not be configured as buttons in the designer project. Often, the default designer setting is "Hi Z", but this may cause a problem if the unused buttons are capacitively coupled to adjacent buttons in the Hi Z state.

Related Categories: CapSense® Controllers
Sunset Owner: KXP; Secondary Owner: VWA; Sunset Date: 01/01/14
Spec No: 001-82818; Sunset Owner: KXP; Secondary Owner: VWA; Sunset Date: 01/01/14