单片机的各种外接硬件如译码器，锁存器，液晶显示器，等着各种企业各种型号的硬件管脚使用说明书，是搞单片机应用的必备手册-All external hardware such as single chip decoder, latch, LCD, wait for all kinds of enterprises of various types of hardware pin manual, is essential to engage in manual SCM application