buenos
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hi
i saw so many different topologies for terminations between the ethernet controller (PHY) and the magnetics (or magjack). i wonder, why?
where to put the terminations for an ethernet magjack, and why?
for a controller they said it has to be close to the eth.controller, for another chip, they said it has to be close to the connector, some cases close to the signal source, other cases close to the signal load?
the signals are sometimes terminated to VDD, sometimes to ground, sometimes in Y-shape configuration with 2 resistors and a capacitor.
is there a general rule for them, or the eth.contr., or just the manufacturers advice a topology for their controllers and we have to copy it?
i saw so many different topologies for terminations between the ethernet controller (PHY) and the magnetics (or magjack). i wonder, why?
where to put the terminations for an ethernet magjack, and why?
for a controller they said it has to be close to the eth.controller, for another chip, they said it has to be close to the connector, some cases close to the signal source, other cases close to the signal load?
the signals are sometimes terminated to VDD, sometimes to ground, sometimes in Y-shape configuration with 2 resistors and a capacitor.
is there a general rule for them, or the eth.contr., or just the manufacturers advice a topology for their controllers and we have to copy it?