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Copyrights Copyright © 2005 Condor Engineering, Inc. All rights reserved. This document may not, in whole or part, be: copied; photocopied; reproduced; translated; reduced; or transferred to any electronic medium or machine-readable form without prior consent in writing from Condor Engineering, Inc. AFDX / ARINC 664 Tutorial (1500-049) Condor Engineering, Inc. Santa Barbara, CA 93101 (805) 965-8000 (805) 963-9630 (fax) support@condoreng.com http://www.condoreng.com Document Revision: May 2005 Document Version: 3.0 Contents and Tables Contents Chapter 1 Overview The Antecedents ……………………………………………………………………………….. 1 Other Avionics Buses ………………………………………………………………………… 4 ARINC 429 …………………………………………………………………………………. 4 MIL-STD-1553 ……………………………………………………………………………. 4 Chapter 2 Ethernet Ethernet ……………………………………………………………………………………………. 7 ALOHA Net……………………………………………………………………………………… 7 The ALOHA Protocol…………………………………………………………………… 8 Issues ………………………………………………………………………………………….. 8 Ethernet Local Area Networks (Broadcast Media)………………………………… 8 The Ethernet Protocol …………………………………………………………………… 9 Issues ………………………………………………………………………………………….. 9 Ethernet Using Category 5 UTP Copper Twisted Pairs …………………………. 9 Ethernet Frame Format …………………………………………………………………….. 10 Full-duplex, Switched Ethernet …………………………………………………………. 10 The Scenario………………………………………………………………………………. 10 Doing Away with Contention

………………………………………………………. 11 Reducing Wire Runs and Weight………………………………………………………. 13 Chapter 3 End Systems and Avionics Subsystems End Systems and Avionics Subsystems……………………………………………… 15 Chapter 4 AFDX Communications Ports AFDX Communications Ports ………………………………………………………….. 17 Chapter 5 Virtual Links: Packet Routing in AFDX Virtual Links …………………………………………………………………………………… 19 AFDX / ARINC 664 Tutorial i Contents Chapter 6 Message Flows Message Flows………………………………………………………………………………… 21 Chapter 7 Redundancy Management Redundancy Management ………………………………………………………………… 25 Chapter 8 Virtual Link Isolation Virtual Link Isolation ………………………………………………………………………. 27 Choosing the BAG and Lmax for a Virtual Link ………………………………… 29 Chapter 9 Virtual Link Scheduling Virtual Link Scheduling …………………………………………………………………… 31 Chapter 10 Jitter Jitter……………………………………………………………………………………………….. 35 Chapter 11 AFDX Message Structures Introduction…………………………………………………………………………………….. 37 Implicit Message Structures ……………………………………………………………… 38 ARINC 429 Labels ………………………………………………………………………….. 40 Chapter 12 The AFDX Protocol Stack The AFDX Protocol Stack ……………………………………………………………….. 41 Transmission …………………………………………………………………………………… 41 Reception ……………………………………………………………………………………….. 43 Appendix A AFDX Frame Addressing and Header Structures Ethernet Addressing ………………………………………………………………………… 45 IP Header Format and Addressing …………………………………………………….. 45 UDP Header Format ………………………………………………………………………… 46 Appendix B Referenced Documents Reference List …………………………………………………………………………………. 47 ii AFDX / ARINC 664 Tutorial Contents Figures Figure 1. AFDX Network…………………………………………………………………… 2 Figure 2. ARINC 429 Communication Protocol …………………………………… 4 Figure 3. MIL-STD-1553 Bus Communication Protocol……………………….. 4 Figure 4. ALOHA Net…

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