Auto bus spec gets an update

The steering group of the Local Interconnect Network (LIN) Consortium has released version 2.0 of the LIN specification.

The LIN itself is a low cost serial communication system intended to be used for distributed electronic systems in vehicles, targeting smart sensors and actuators where the bandwidth and versatility of the Controller Area Network (CAN) bus is not required.

The standard itself specifies the transmission protocol, the transmission medium, the interface between development tools, and the interfaces for software programming.

The communication is based on the SCI (UART) data format, a single-master/multiple-slave concept, a single-wire 12V bus, and clock synchronisation for nodes without a stabilised time base.

LIN 1.0 was released in March 2000 with the objective of defining and implementing an open standard for class-A serial buses in vehicle networks. LIN 2.0 features include an enhanced physical layer, an enhanced protocol layer as well as in-vehicle configuration capabilities supported by node capability file and node configuration messages. An application program interface (API) and diagnostic support have also been added in the new version of the specification.

The LIN Consortium was founded in 1998 as a workgroup of seven companies focused on developing the LIN specification as a low-end multiplex solution to complement the CAN protocol, while reducing the development, production and servicing of automotive electronics.

The Consortium has evolved to today’s 35 members – the original seven Steering Group and 28 associated members – comprising leaders in the automotive, semiconductor and communications sectors. Steering Group members include Audi, BMW, DaimlerChrysler, Motorola, Volvo Car Corporation, Volkswagen and Volcano Communications Technologies (VCT).