说明：  XPT2046是一款4导线制触摸屏控制器，内含1；逼近型A/D转换器；2、芯片功能主要特性芯片功能主要特性；1)具有4线制触摸屏接口；2)具有触摸压力测量功能；3)可单电源工作，工作电压范围为2.2V—5.2；4)支持1.5V～5.25V电平的数字I/O口；5)内部自带＋2.5V参考电压；6)具有125KHz的转换速率；
(The XPT2046 is a 4 wire system with touch screen controller, 1; approximation A/D converter; 2, the main characteristics of the function of the chip chip main features; 1) has 4 wire touch screen interface; 2) with a touch pressure measurement function; 3) single power supply, working voltage range of 2.2V - 5.2; 4) support 1.5V ~ 5.25V level digital I/O 5 + 2.5V); internal reference voltage; 6) with conversion rate of 125KHz;)