CAN FD physical layer device and CAN FD controller interface recommendations
CiA 601-1 recommends the physical layer design for CAN FD device interfaces. It is based on the ISO 11898-2:2016 standard, which specifies the CAN FD transceivers. The 16-pages document deals with that what is not covered by the ISO standards, in particular the symmetry issues of the other interface components. This includes the transceiver loop-delay, the transceiver TX delay and RX delay symmetries as well as the transmitter delay. CiA 601-1 doesn’t cover system design recommendations; they will be given in CiA 601-3, which is still under development. The CiA 601-4 ringing suppression circuitry specification for CAN FD networks is under review and will be released soon as version 2.0.
CiA 601-2 provides guidelines for the CAN controller interface to the host controller. Besides special states and modes, it recommends the control and status interface, the bit-timing configuration parameters including those for the secondary sample-point. The 16-pages document doesn’t specify the time-stamping functionality. This is done in CiA 603, which will be released soon.
All CAN FD related recommendations and specifications are free-of-charge for CiA members. Non-members have to pay a lump sum of € 499,00 plus German VAT (value added taxes).