Topic summary
Data bus
Extracted from the Wikipedia article Bus (computing).
Implementation details
However, this distinction—that power is provided by the bus—is not the case in many avionic systems, where data connections such as ARINC 429, ARINC 629, MIL-STD-1553B (STANAG 3838), and EFABus (STANAG 3910) are commonly referred to as data buses or, sometimes, databuses. Such avionic data buses are usually characterized by having several Line Replaceable Items/Units (LRI/LRUs) connected to a common, shared media. They may, as with ARINC 429, be simplex, i.e., have a single source LRI/LRU or, as with ARINC 629, MIL-STD-1553B, and STANAG 3910, be duplex, allowing all the connected LRI/LRUs to act, at different times (half duplex), as transmitters and receivers of data.