本标准描述了用于微控制器的设备间/内部互连的串行控制总线。还提供了站点内互连。本标准侧重于OS1第1、2和7层，可与其他标准和实践一起使用，以实现特定应用的整体解决方案。

This standard describes a serial control bus for interdevice/intrabuilding interconnection of microcontrollers. Intrasite interconnection is also provided. This standard, which focuses on OS1 layers 1,2, and 7, may be used with other standards and practices to effect total solutions to specific applications.