基于STM8T141设计的触摸或接近检测方案

图4.表面电容传感器等效电容电路

图5.手提应用等效电路图

STM8T14X-EVAL 评估板

The STM8T14X-EVAL is an evaluation kit which introduces developers to STMicroelectronicsSTM8T141touch and proximity capacitive sensor. It contains anSTM8T141evaluation board, the MB858, plus a set of preconfigured plug-in modules which allow to evaluateSTM8T141device performances in either touch or proximity detection (depending on the module which has been plugged in).

STM8T14X-EVAL 评估板主要特性:

The evaluation kit features are the following:

■ Touch detection with on-board PCB sensing electrode and 1.5 mm dielectric panel

■ Easy dielectric adjustment by stacking acrylic panels

■ Proximity detection with on-board PCB sensing electrode or plug-in antenna

■ Standalone power configuration using an on-board battery

■ External power supply through USB interface

■ Electrode grounding or shielding configured by jumper

The STM8T14X-EVAL kit includes:

● 1 STM8T141 evaluation board (MB858)

● 4 STM8T141 preconfigured plug-in modules (MB856)

● 1 antenna shielding cable

● 1 additional 3 mm acrylic panel


图6.STM8T14X-EVAL 评估板外形图

图7. MB858评估板和插入STM8T141模块

图8. STM8T141评估板(MB858)电路图

图9. STM8T141模块(MB858)电路图

本文引用地址：//m.amcfsurvey.com/article/151867.htm