Byteflight is an automotive databus created by BMW and partners Motorola,

Elmos Semiconductor Elmos Semiconductor SE is a German manufacturer of semiconductor products headquartered in Dortmund, North Rhine-Westphalia, Germany. Elmos supplies automotive application-specific integrated circuits (ASICs). Processes Elmos has four high vo ...

and Infineon to address the need for a modernized safety-critical, fault tolerant means of electronic communication between automotive components. It is a message-oriented protocol. As a predecessor to FlexRay, byteflight uses a hybrid synchronous/asynchronous TDMA based means of data transfer to circumvent deficiencies associated with pure event-triggered databuses. It was first introduced in 2001 on the

BMW 7 Series (E65) The fourth generation of the BMW 7 Series consists of the BMW E65 and BMW E66 luxury cars. The E65/E66 was produced from 2001 to 2008 and is often collectively referred to as the E65. The E65 replaced the E38 7 Series and was produced with petro ...

. Eclipse 500 jet aeroplanes use Byteflight to connect the avionics displays.Eclipse 500 Avionics Architecture diagram in

Data frame

In Byteflight terminology, a data frame is called a ''telegraph''. A telegraph starts with a start sequence containing six dominant bits. This start sequence is followed by a one byte message identifier. This is followed by a length field indicating the length in bytes of the transmitted data. The telegraph ends with a 15 bit CRC value encoded in two bytes leaving the LSB unused. All bytes are framed by a recessive start bit at the beginning and a dominant stop bit at the end.

References

External links

byteflight website
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