CAN / CAN-FD Products

Sital offers IP and board product solutions for CAN bus, CAN-FD and ARINC-825-4. These hardware and software solutions support 11-bit and 29-bit CAN messaging and provide capability for transmitting and receiving messages for various lower-level and higher-layer protocols including ISO-11898-5, CAN 2.0, CAN-FD, ARINC-825-4, CANopen, SAE J1939, and DeviceNet4. They can operate at data rates up to 4 Mb/s and provide configurable options to support the CAN bus and ARINC-825-4 standards.

For CAN bus and ARINC-825, Sital offers intellectual property (IP) and board-level solutions with included software. These all implement Standard, Extended and Remote Frames; include an 8-bit Message_ID filter, with filtering based on the Message ID and first two data bytes; a power Monitor (listen-only) mode; 8-message Transmit and Receive FIFOs; loopback mode for self-test, and options to either enable or disable

message re-transmission 

For support of CAN-FD and ARINC-825-4, Sital implements the CAN-FD physical layer. This includes enabling different data rates for arbitration and data transfers, along with CAN-FD’s bit timing requirements. Sital’s IP and boards also implement the CAN-FD frame structure, including 64-byte data fields, operation of the FDF, IDE, RRS, BRS and SRR bits; delays before and after the ACK (acknowledgement) bit and either 17-bit or 21-bit CRCs.

For ARINC-825, Sital implements the ARINC-825 modified DLC (data link control) field, Identification Service, and CAN bus bandwidth management. In addition to message prioritization during arbitration, Sital’s bandwidth management includes support of both synchronous, periodic messages and asynchronous messages; implementing minor and major frames; balancing bus loading; controlling the transmission rate of each node; and performing bus load calculations. Sital’s CAN bus products also provide the ARINC-825-4 Periodic Health Status Message (PHSM) and Management Information Base functionality.

For its CAN bus/ARINC-825 solutions, Sital offers an option for its Safe and Secure (SnS) Technology. By means of enhanced physical layer monitoring, Sital’s SnS provides continuous cyber authentication for detecting “spoofing” (or impersonating) nodes on CAN or ARINC-825 buses. In addition, Sital’s SnS also provides electrical fault detection. This enables detection and location of faults such as intermittent or continuous open or short circuits in data bus and stub cabling, couplers, connectors, connected LRUs and bus terminations.

Further, for CAN bus, Sital offers denial of service (DoS) mitigation. This feature provides a low-level hardware means for preventing CAN bus nodes from transmitting continuously on a CAN bus. This guarantees that if a node on a bus is running malicious or erroneous software, that it can’t “take over” all of the bus’s bandwidth. As a result, this feature ensures that all nodes on the bus will have the opportunity to transmit.

Sital’s PhysiCAN board comes with Windows GUI software. The GUI enables users to configure the board for their specific topologies and applications and to view the occurrence of incidents of spoofing nodes and electrical faults in real time. The PhysiCAN GUI may also be used as a development platform for embedding Sital’s CAN bus SnS IP into embedded systems.