与单片机相关的外围器件的C语言程序，相关芯片的资料和应用，以及外围电路的连接-And SCM-related peripheral device C language program, information and applications related to chips, and the external circuit connection

本文件提供部分难于制作的Pcb封装，绝对正规，适合专业应用。-This document provides some packages difficult to make the Pcb