Purpose: This document is the specification of a genericinterface to be used between avionics computing equipment thatexchange binary message-oriented data. Several avionicsarchitectures have been considered. For example, the interfacecould be used between an Flight Management Computer (FMC) and aCommunication Management Unit (CMU) Mark 2, between an FMC and anACARS MU, or between any two avionics Line Replaceable Units (LRU).Throughout this document, the term FMC may apply to any type ofnavigational unit. The term CMU may apply to any on-board router.The layer functionality defined herein operates independently ofdevice type.
This interface was developed so that various manufacturers canelect to partition aspects of Air Traffic Services (ATS)applications and protocols in different manners between these twophysical LRUs or logical partitions. This specification wasdeveloped by defining the major functionality that should beimplemented in either the FMC or the CMU in support of ATSapplications and then defining the interfaces to support thesefunctions at each layer, assuming various configurations.
This interface can be implemented in various hardwareenvironments including integrated architectures, over an additionalARINC 429 data bus, Ethernet, or other supportive bus interfacearchitectures. Specified herein are protocols that support thisinterface regardless of how the functions may be allocated in anyparticular hardware architecture. These protocols are not limitedto the ARINC 429 data bus or ARINC 646 Ethernet bus systems;therefore, the data structures designed in this interface are alsonot constrained to any specific bus type.
- Edition:
- 99
- Published:
- 12/15/1999
- Number of Pages:
- 105
- File Size:
- 1 file , 910 KB
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