A method, a system, a bus master module and a test module for testing the termination of a differential serial communication bus

摘要

The invention relates to method and a system for performing the steps of the method of testing the termination of a differential serial communication bus the serial communication bus comprising a first signal line and a second signal line, wherein the bus is fit for termination by a bus terminator of the open-line fail-safe type or the open-line and closed-line fail-safe type, the method comprising the steps of setting the serial communication bus in an idle-mode; electrically connecting a test load between the first signal line and the second signal line; measuring a first voltage on the first signal line; measuring a second voltage on the second signal line; determining a first voltage difference from the first and second voltage; comparing the first voltage difference with a first reference level; generating an incorrect termination signal if the first voltage difference is below the first reference level.