Termination switch

[CeeRox]

Hi!

I want to be able to turn on/off the 120 Ohm termination resistor that
is placed at the input of my CAN-transciever. I want to do this with a
GPIO from my MCU... Any ideas? I've seen a solution with a SPST-
switch...will that work?

 

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Hi!

I want to be able to turn on/off the 120 Ohm termination resistor that
is placed at the input of my CAN-transciever. I want to do this with a
GPIO from my MCU... Any ideas? I've seen a solution with a SPST-
switch...will that work?

Not knowing the specifics of what CAN is, the solution can vary from
simple to complex. If it's just some sort of 10-100KHz thing with slow
edges, put the resistor to ground through an open-drain logic output.
A logic low level enables the resistor, and a high floats it.