说明：  PIC是国内流行的单片机，越来越多的行业和公司都采用MicroChip的PIC，但相关的中文介绍较少，这儿提供一篇中文资料，以助提速学习。
(PIC microcontroller is the popular, more and more industries and companies are using MicroChip the PIC, but less related to the Chinese description, a Chinese information provided here to help speed learning.)