说明：  介绍CAN控制器SJA1000的特点、内部结构以及SJA1000的寄存器结构及地址分配；CAN协议通信格式。并以独立CAN控制器SJA1000为例，结合CAN协议说明了一种通用型CAN总线的开发与设计
(Introduce the characteristics of CAN controller SJA1000, SJA1000 and the internal structure of the register structure and address allocation CAN protocol communication format. And as an independent CAN controller SJA1000 example, the combination of CAN protocol describes a general-purpose CAN bus development and design)