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Project Information

Introduction

The use of in-vehicle communication networks rapidly increased in recent years. Hence, the requirements of reliability and availability continual grew more and more important. Soon it was considered that a failure tolerant system is necessary to meet the newly arisen demands. These forced the development of fault tolerant communication interfaces. Especially for low speed applications up to 125 kbit/s the low speed CAN provided a basic platform for those developments. Due to slightly different solutions from different semiconductor manufacturers GIFT and ICT was founded, to achieve a world wide accepted standard in fault tolerant low speed CAN communication.

Scope

The GIFT(Generalized Interoperable Fault Tolerant CAN Transceiver) project takes aim at a specification of a CAN transceiver module in such a way, that a technical interoperation of devices from different manufacturers is possible. GIFT itself is a joint project of the automotive and semiconductor industry. The efforts should lead to an ISO standard. ICT (International Transceiver Conformance Test) provides a testing scheme, for the verification of this standard and therefore the fault tolerant interoperation.

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Project

A fault tolerant communication as it is described in ISO 11519-2 means that the communication should continue (with reduced bandwidth) if several failures to the connecting bus are applied. In general for low speed CAN communication there is a pair of twisted wires used. Common failures are: broken wire short circuit to ground or supply voltages mutually short circuit of bus wires The GIFT project describes these failures and provides a minimum set of means how to deal with the failures to achieve a fault tolerant behavior.