随着串行通讯进入更多应用领域，因此，在一些应用里，需要对通讯功能的报文识别位提出分配标准

化的要求。原先的地址范围由 11 个识别位定义，如果地址范围扩大，则这些应用就可以更好地由 CAN 来

实现。 -With the serial communication into more applications, so in some applications, the need for communication of message identification bit allocation proposed standardization requirements. The original address range defined by the 11 recognition sites, if the address scope, these applications can be better achieved by the CAN.