SAE AIR4288A

1 Scope
  1.1 History of the SAE AS4074 Standard
2 Physical Layer Consideration
  2.1 Fiber Optic Implementation
  2.2 Wire-Based (Coaxial) System Implementation
3 AS4074 Media Access Characteristics
  3.1 Data Bus Redundancy
  3.2 Claim Token Process
  3.3 Operation of the Token Passing Protocol
  3.4 Send Message Procedure
  3.5 Receive Message Procedure
  3.6 Frame Convention
  3.7 Error Handling
  3.8 Station Management Concept
  3.9 Timer Concept
  3.10 Station Address Assignment and Physical Placement
  3.11 Message Handling
  3.12 Global Time References
  3.13 Software Design Considerations
  3.14 Data Security Issues
  3.15 Test Concepts
4 Sample System Design Approach
  4.1 System Design Approach I
  4.2 Data Transfer Types
  4.3 Analysis of Message Traffic
  4.4 Notes on the Equations
  4.5 System Requirements
  4.6 Simple Design Example
  4.7 System Design Approach II
  4.8 System Design Approach III
5 BIU State Machine Definition
  5.1 Offline (S0)
  5.2 Quiescent State (S1)
  5.3 Disabled State (S2)
  5.4 Enabled State (S3)
  5.5 Fault State (S4)
  5.6 Offline State Substates
  5.7 Quiescent State Substates
  5.8 Disabled State Substates
  5.9 Enabled State Substates
  5.10 Fault State Substate
Appendix A References
Appendix B SAE AS4074 Standard - Handbook Cross Correlation Matrix
Appendix C Basic Program for Analysis of Priority System by Variable
           THT/TRT Setting
Appendix D Glossary of Terms
Figures

Explains in detail, the rationale behind the features and functions of the AS4074, Linear, Token-passing, Bus (LTPB).

This document is intended to explain, in detail, the rationale behind the features and functions of the AS4074, Linear, Token-passing, Bus (LTPB). The discussions also address the considerations which a system designer should take into account when designing a system using this bus. Other information can be found in these related documents:AIR4271 - Handbook of System Data CommunicationAS4290 - Validation Test Plan for AS4074