基于STM8T141設計的觸摸或接近檢測方案
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圖4.表面電容傳感器等效電容電路
圖5.手提應用等效電路圖
STM8T14X-EVAL 評估板
The STM8T14X-EVAL is an evaluation kit which introduces developers to STMicroelectronics STM8T141 touch and proximity capacitive sensor. It contains an STM8T141 evaluation board, the MB858, plus a set of preconfigured plug-in modules which allow to evaluate STM8T141 device performances in either touch or proximity detection (depending on the module which has been plugged in).
STM8T14X-EVAL 評估板主要特性:
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
圖6.STM8T14X-EVAL 評估板外形圖
圖7. MB858評估板和插入STM8T141模塊
圖8. STM8T141評估板(MB858)電路圖
圖9. STM8T141模塊(MB858)電路圖本文引用地址：http://www.104case.com/article/151867.htm
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