说明：  TM1621是128点、内存映象和多功能的LCD驱动器,TM1621的软件配置特性使它适用于多种LCD应 用场合,包括:LCD模块和显示子系统。用于连接主控制器和TM1621的管脚只有4或5条，TM1621还有 一个节电命令用于降低系统功耗。
(TM1621 is 128 points, memory mapping and multi-functional LCD driver, TM1621 software configuration features make it suitable for a variety of LCD should With applications including: LCD modules and display subsystems. For connecting the host controller and TM1621 pin only 4 or 5, TM1621 there A power save command is used to reduce system power consumption.)