说明：  1、本实验箱采用的液晶显示屏内置控制器为SED1520，点阵为122x32，由两片SED1520组成，由E1、E2分别选通，控制显示屏的左右两半屏。
(1, the experimental use of the boxes built-in LCD controller for SED1520, to 122x32 dot matrix, composed of two SED1520, E1, E2 respectively strobe control screens around two semi-screen.)