Technology Backgrounder

How to Build a Simple and Inexpensive FlexRay™ Node

Fujitsu Microelectronics America, Inc.

July 2007

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Introduction

Reviewing the Benefits of FlexRay™

Adoption of the next-generation automotive protocol, FlexRay™, is rapidly underway now, as automakers and their OEMs implement the standard in safety, comfort, and information systems and networks. FlexRay provides the significant advantage of deterministic behavior, includes a dual-redundant channel, and uses scalable static and dynamic message transmission that deliver guaranteed message latency time. A system based on FlexRay can be programmed for synchronous and asynchronous transmission that provides higher flexibility and time-triggered communi-cations at 10 times the rate of the popular and proven Controller Area Network (CAN) protocol. In addition, the protocol supports clock synchronization via a global time base, collision-free bus access, message-oriented addressing via identifiers, and scalable system fault-tolerance using either single or dual channels.

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