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GMW GMW3122 GM-Alliance Corporate Dual Wire CAN Physical Layer And Data Link Layer Specification
standard by General Motors Worldwide , 11/22/2002
2.1 Scope of Document This document specifies the physical layer requirements for a Carrier Sense Multiple Access/Collision Resolution (CSMA/CR) data link which operates on a dual wire medium to communicate among Electronic Control Units (ECU) on road vehicles at normal transmission rates of: