CAN termination

Wired connection to the boards

CAN termination

Postby jalava » Thu Feb 01, 2018 4:46 am

Does Carberry do CAN bus termination and if it does, can it be turned on or off from software?
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Joined: Thu Feb 01, 2018 3:43 am

Re: CAN termination

Postby PAOLOPED » Wed Oct 10, 2018 5:10 pm


No is not terminated and cannot be done from software, you need to put a 120 ohm resistor between CAN H and CAN L

thanks and best regards
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Joined: Thu Mar 10, 2016 10:34 am

Re: CAN termination

Postby ClayHadi » Tue Mar 24, 2020 7:13 pm

Hi.... Note that the terminating resistors do DC-load the signal.Having a terminating resistor matching the characteristic impedance is for AC functionality - making sure there are no signal bounces.
For a very short cable, a single 120 ohm resistor would normally work. But may not be needed depending on propagation delay compared to your transfer rate.For short cables, you can often get by without any termination unless the baudrate is very high.
How about your engineers verifies explicitly what reflections they have in the cable? No need to have extra loads if there aren't really any problems with reflections - less load is less power wasted.
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Joined: Tue Mar 24, 2020 6:59 pm

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