本点阵电子显示屏系统以STC89C52单片机作为控制核心，其外围电路包括存储器扩展模块、LED显示电路模块、驱动电路模块、PC通信电路模块。其中，控制芯片的行驱动用2个74LS138构成4-16译码器-The dot electronic display system STC89C52 microcontroller as control core, the peripheral circuits including memory expansion module, LED display circuit module, the drive circuit module, PC communication circuit module. Wherein the control chip row driver with two 74LS138 constitute 4-16 decoder.