Column Control DTX

Debug Automotive Design Faster with CAN-dbc Trigger and Decode

Application Notes

Introduction

The differential Controller Area Network (CAN) bus is used extensively in all of today’s automobiles for drive-train and body control. This protocol was developed by Bosch more than 30 years ago, and it is still considered the “workhorse” serial control bus of the automobile. The CAN bus has also been heavily adopted for industrial and medical equipment control applications.

The oscilloscope is the primary measurement tool used today to test and debug the physical layer of this serial bus. Although CAN bus protocol analyzers, such as Vector’s CANanalyzer, are also commonly used for testing and debugging at a higher-abstraction application level, the advantage of an oscilloscope is that it provides you with the ability to monitor the analog quality (signal integrity) of the physical layer of the CAN bus. The electrical environment in automobiles is naturally harsh with lots of noise and often unexpected transients. The core competence of an oscilloscope is that it can capture and show you details of those infrequent automotive transients and noise that could be producing CAN bus errors.

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Column Control DTX