Commercial Standard Digital Bus
The Commercial Standard Digital Bus is a unidirectional asynchronous bus, formerly known as the Collins Standard Digital Bus. The maximum speed is 50 kbit/s.
Most civilian aircraft use one of 3 serial buses: the Commercial Standard Digital Bus,
ARINC 429, or AS-15531.
The Commercial Standard Digital Bus is a two-wire asynchronous broadcast data transmission bus. Data is transmitted over an interconnecting cable by devices that comply with Electronic Industries Association RS-422A. The physical layer is EIA-422.
Messages on the CSDB consist of one address byte followed by any number of data bytes.
