The nonprofit CiA (CAN in Automation) association has released the CiA 604-1 CAN FD Light specification as Draft Specification Proposal (DSP). This 16-page document describes CAN FD Light responder nodes. They only act on CAN FD data frames received from commander nodes. This avoids the need of costly add-on circuitry for the CAN FD Light responder nodes. The responder nodes do not arbitrate. The communication scheme is a commander/responder behavior. One commander node controls the communication of the connected responder nodes. The transmitted frames comply with the CAN FD data frames as specified in ISO 11898-1:2015. This means the maximum
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