关键词: 触摸感应, 频率校准, 频率检测, 灵敏度, 感应强度

Abstract: According to the sensitivity of the current touch circuit can’t be configured, a method to realize the sensitivity configuration is presented. An 8-bit register is set to adjust the current of the touch sensing module, and the frequency will be changed by changing the current, then the purpose of sensitivity adjustment is achieved. At the same time, this circuit has a new function of touch strength detection, and outputs three results of low, medium and high touch intensity. By integrating the sensitivity configuration and intensity detection, the sensitivity can be set more accurately and quickly.

Key words: touch sensing, frequency calibration, frequency detector, sensitivity, sense intensity