Hi all
The wave of CANL is abnormal, like this picture, the green wave is CANL, when CANL is up,there is a groove.
How can I make the wave be up always?
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Hi all
The wave of CANL is abnormal, like this picture, the green wave is CANL, when CANL is up,there is a groove.
How can I make the wave be up always?
Went,
Thanks for the information, this stub length wouldn't cause any issues. This small dip looks like a reflection, or something is affecting the CANL driver for a very short amount of time. Since this waveforms are identical up to this point, asymmetries don't make sense.
33pF helps with emissions by slowing down edges and absorbing high frequency noise that will propagate along the CAN bus. The resistance and capacitance that are shown wouldn't cause this issue in a typical application.
Does this bump in the CANL waveform happen every single dominant to recessive transition? Or is this specific to an event in the application?
Regards,