Serial Data Communications Between Microcomputer Systems in Heavy-Duty Vehicle Applications
This SAE Recommended Practice defines a recommended practice for implementing a bidirectional, serial
communication link among modules containing microcomputers. This document defines those parameters of the serial
link that relate primarily to hardware and basic software compatibility such as interface requirements, system protocol,
and message format. The actual data to be transmitted by particular modules, which is an important aspect of
communications compatibility, is not specified in this document. These and other details of communication link
implementation and use should be specified in the separate application documents referenced in Section 2.