Glossary · Vehicle Networks

CAN FD

Also known as: CAN with Flexible Data-rate

Definition

CAN FD: CAN with Flexible Data-rate — extended payload (up to 64 bytes) and higher bit rate. CAN FD extends classic CAN with a switchable data-phase bit rate and a 64-byte payload.

Where this matters: Embedded Software Engineering

Its larger frames make it the natural carrier for SecOC-protected messages and short OTA chunks; many modern E/E architectures run mixed CAN / CAN FD networks.

Related terms

CAN
Controller Area Network — the dominant low-bandwidth automotive bus.
SecOC
Secure Onboard Communication (SecOC) is the AUTOSAR mechanism that adds message authentication and freshness protection to in-vehicle network traffic.

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