3 Overview: CAN XL

CAN XL incorporates CAN SIC and further addresses next-generation requirements such as an increased payload of up to 2048 bytes, dramatically increasing data payloads compared to CAN CC (8 bytes) and CAN FD (64 bytes). Up to 32× more data can now be transmitted through a single CAN XL frame compared to a CAN FD frame. This results in higher efficiency due to a lower overhead per byte, with the potential for larger messages to be sent in a single frame. To maintain backward compatibility with CAN FD and CAN SIC, CAN XL's arbitration phase still operates up to 1Mbps. Once arbitration is complete, the CAN XL FAST mode data phase can run up to 20Mbps as shown in Figure 3-1. This allows CAN to reach a data throughput that outperforms designs such as multidrop Ethernet or FlexRay.