GT9110P is a new generation of single chip 10 point capacitive touch scheme specially designed for tablet computers. It has up to 42 drive channels and 30 sensing channels to realize the high-precision touch of tablet computers. The special capacitance pen control chip GT930 for capacitance screen matched with GT9110P adopts the pressure detection mode of varistor, which can realize the fine operation of pen writing on capacitance screen and increase the user experience.