Around 60 electronic control units communicate with each other in vehicles today via the Controller Area Network (CAN). The need for in-vehicle communication is growing as the amount of networking increases and more comfort and automation are implemented. The new protocol variant CAN FD (CAN Flexible Data-rate) allows a higher data bandwidth and transmission speed. This saves time in programming, in tests and diagnostic routines as well as for software updates over the air (SOTA).
With its TLE925x CAN FD transceivers, Infineon Technologies makes data exchange up to 30 times faster than today. The TLE925x reaches transmission speeds of up to 5 Mbit/s. Compared to the classical CAN transceivers with a maximum of 8 byte, the CAN FD transceivers such as TLE925x can send a payload of up to 64 byte per message. This opens up the possibility to check the transmitted data for consistency in the transmitting control unit and to sign it with a 21-bit checksum instead of the 17-bit possible so far. Longer checksums ensure reliable communication between the control units. This makes it possible to better secure data transmission in the vehicle without the application software becoming more complex in the electronic control unit.