电容触摸测试MCU的灵活性

　　电容触摸测试MCU的灵活性

　　电容式触控技术广泛应用于从智能手机到冰箱和汽车的电子产品。在许多应用中，电容式触摸传感器提供输入到一个专用的控制器芯片。MCU直接参与当控制器集成为一个外围单片机上死去。

　　无论MCU是否有集成在芯片上的传感器/控制器电路或触摸传感器的信息来在一个专用的设备，MCU必须处理的电容触摸输入产生的一些问题，以达到满意的用户体验。这些措施包括延迟（及时响应用户），精度和能源消耗。能源消耗在电池供电设备中尤为重要。

　　MCU供应商提供各种各样的电容式触摸解决方案，从专门的外设到超低功耗接口与电容式触摸传感器的电池供电的应用。在审查解决方案，但是，电容式触摸技术的快速回顾应该是有帮助的。

　　Capacitive touch basics

　　Sensors in general present special design problems and capacitive touch sensors are no different. Much of the complexity is due to the fact that the distributed nature of sensor electric fields make “lumped element” approximation of their behavior inaccurate and misleading. To address these issues， semiconductor companies have published numerous application notes that basically provide rules that – if followed – will result in a successful design. This article will address basic considerations; knowing a few basics is essential to get a design started in the right direction.