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Bosch Semiconductors
Automotive IP modules

CAN XL

Next step in CAN evolution

Bosch CAN_XL Logo





CAN XL provides a superior solution for data rates up to 10Mbit/s by maintaining the advantages of the CAN protocol like collision-resolution by non-destructive arbitration.

With respect to the bitrate, CAN XL fills the gap between CAN FD and 100BASE-T1 (Ethernet).

Status

Bosch CAN XL
Filling the gap between CAN FD and Ethernet

The specification of the CAN XL protocol and physical layer is done by the CiA Special Interest Group CAN XL in the CiA610 document series.

The CiA CAN XL specification started in December 2018 with the goal to have a technically stable CAN XL specification for OSI layer 2 (known as CAN XL protocol) until end of 2020. As second step, the ISO standardization will be started. In addition, many other CAN related standards will be updated simultaneously to support CAN XL. Examples are the CAN Conformance Test according to ISO16845 and the physical layer.

Key Protocol Features

Bosch CAN_XL frame
  • Net data rates up to 10Mbit/s
  • Large data fields with up to 2048 byte enable the use of higher layer protocols like IP (Internet Protocol) and even the tunneling of complete Ethernet frames
  • Interoperability with CAN FD for mixed FD/XL networks

Physical Layer

Bosch CAN XL
Mixed FD / XL networks

CAN XL will be operable with all transceivers:

  • Classical CAN up to 1Mbit/s
  • CAN FD up to 2Mbit/s and CAN FD-SiC up to 5-8Mbit/s
  • CAN XL up to 10 Mbit/s and beyond (to be developed)

Publications

> Introduction to CAN XL

> CAN XL at CAN in Automation (CiA)

> Proceedings of the postponed international CAN Conference (iCC) 2020 conference

The proceedings include the following papers from Bosch:

F. Hartwich, “Introducing CAN XL into CAN Networks” in Proceedings of the 17th international CAN Conference, Baden Baden, Germany, 2020.

A. Mutter, "CAN XL error detection capabilities", in Proceedings of the 17th international CAN Conference, Baden-Baden, Germany, 2020.

C. Senger, “CRC Error Detection for CAN XL” in Proceedings of the 17th international CAN Conference, Baden Baden, Germany, 2020.