Datasheet

CY8C21x34/B CapSense
®
Design Guide Document No. 001-66271 Rev. *B 7
1. Introduction
1.1 Abstract
This document gives design guidance for using capacitive touch sensing (CapSense
®
) functionality with the
CY8C21x34/B family of CapSense Plus Controllers. The following topics are covered in this guide:
 Features of the CY8C21x34/B family of CapSense Plus Controllers
 CapSense principles of operation
 Introduction to CapSense design tools
 In depth guide to tuning the CapSense touch sensing system for optimal performance
 Advanced features such as water tolerance and proximity detection
 Electrical and mechanical system design considerations
 Additional resources and support for designing CapSense into your system
1.2 Cypress CapSense Documentation Ecosystem
Figure 1-1 and Table 1-1 summarize the Cypress CapSense documentation ecosystem. These resources allow
implementers to quickly access the information needed to successfully complete a CapSense product design.
Figure 1-1 shows the typical flow of a product design cycle with capacitive sensing; the information in this guide is
most pertinent to the topics highlighted in green. Table 1-1 includes links to the supporting documents for each of the
numbered tasks in Figure 1-1.