CAN FD Light: A “Handler/Dog” Protocol

July 21, 2020 Tiera Oliver

The nonprofit CiA (CAN in Automation) association to develop a “handler/dog” data link layer based on the CAN FD protocol as specified in ISO 11898-1:2015.

The “handler” node implements the CAN FD protocol and sends 11-bit identifier FD frames. The “dog” nodes transmit data frames in FBFF (FD base frame format) only on request of the “handler” node. According to the company, this avoids the implementation of high-performance and costly oscillators.

The protocol engine of the “dog” nodes is simplified compared to a CAN FD controller. Error and overload frames are not supported at all. However, data fields of up to 64 byte are possible. The bit-rate is not switched and limited to one fixed value, for example 1 Mbit/s.

This commander/heeler approach is suitable for embedded networks in LED devices for passenger cars. Other application examples include door control subsystems and air-conditionings with a lot of sensors.

The CiA Special Interest Group (SIG) is named “CAN FD light”. According to the company, Fred Rennig from ST Microelectronics chairs the group, which is comprised of about 20 experts from different companies.

For more information, visit: https://www.can-cia.org/

About the Author

Tiera Oliver, edtorial intern for Embedded Computing Design, is responsible for web content edits as well as newsletter updates. She also assists in news content as far as constructing and editing stories. Before interning for ECD, Tiera had recently graduated from Northern Arizona University where she received her B.A. in journalism and political science and worked as a news reporter for the university's student led newspaper, The Lumberjack.

Follow on Twitter Follow on Linkedin Visit Website More Content by Tiera Oliver
Previous Article
AAEON Releases the BOXER-8251AI AI Edge Box PC
AAEON Releases the BOXER-8251AI AI Edge Box PC

AAEON announced the release of the BOXER-8251AI AI edge box PC powered by NVIDIA® Jetson Xavier™ NX.

Next Article
Murata’s SCHA600 6 DoF MEMS Sensor for Safety-Critical Automotive Applications and Automated Driving
Murata’s SCHA600 6 DoF MEMS Sensor for Safety-Critical Automotive Applications and Automated Driving

This new sensor allows for ADAS and AD functionality through data fusion with GNSS and various perception s...