这个部分提供了每个器件特性的汇总、列出了引脚分配、并描述了每个引脚的功能。这个文档还给出了外设
的详细描述、电气规范、参数测量信息、和与可用封装相关的机械数据。(This section provides a summary of the characteristics of each device, lists pin assignments, and describes the functions of each pin. This document is also given out of the peripherals
Detailed descr iption, electrical specifications, parameter measurement information, and mechanical data related to available encapsulation.)