文件名称：PSoC® 4 和 PSoC 6 MCU CapSense®设计指南
文件大小：5.05MB
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更新时间：2023-06-02 08:35:55
触摸按键 CapSense
目录 ........................................................................................................................................................................................31 简介 .................................................................................................................................................................................61.1 摘要 .......................................................................................................................................................................61.2 简介 .......................................................................................................................................................................61.3 CapSense 功能......................................................................................................................................................71.4 PSoC 4 和 PSoC 6 MCU CapSense Plus 特性......................................................................................................71.5 CapSense 设计流程...............................................................................................................................................92 CapSense 技术.............................................................................................................................................................112.1 CapSense 基本原理.............................................................................................................................................112.1.1 自电容感应.................................................................................................................................................122.1.2 互电容感应.................................................................................................................................................142.2 电容式触摸感应方法 ............................................................................................................................................152.2.1 CapSense Sigma Delta（CSD）...............................................................................................................152.2.2 CapSense Crosspoint（CSX） .................................................................................................................152.3 信噪比..................................................................................................................................................................172.4 CapSense Widget................................................................................................................................................182.4.1 按键（零维传感器） ..................................................................................................................................182.4.2 滑条（一维传感器） ..................................................................................................................................192.4.3 触摸板/触控板（二维传感器）...................................................................................................................202.4.4 接近（三维传感器） ..................................................................................................................................212.5 防水功能..............................................................................................................................................................212.5.1 水滴和水流对 CapSense 传感器产生的影响..............................................................................................222.5.2 驱动屏蔽信号和屏蔽电极...........................................................................................................................242.5.3 保护传感器.................................................................................................................................................253 PSoC 4 和 PSoC 6 MCU CapSense.............................................................................................................................273.1 CapSense CSD 感应方式....................................................................................................................................273.1.1 GPIO 单元中电容-电流转换器....................................................................................................................283.1.2 IDAC 源模式 ..............................................................................................................................................283.1.3 IDAC 灌电流模式 .......................................................................................................................................293.1.4 CapSense 时钟发生器...............................................................................................................................303.1.5 Sigma Delta 转换器 ...................................................................................................................................313.1.6 模拟复用器............................................................................................................................