I am trying to understand the need for termination resistors in DDR2/DDR3 designs and I have seen some Max 10 dev kit boards that don't terminate the address lines with 50 Ω terminating resistors.
However, DDR3 chips do have the On Die Termination (ODT) feature just for the Data and DQS lines. Why don't we have it for address/control/clock lines? Since Max 10 dev kits obviously work without termination resistors it's not really needed, but then what happens to the energy? Wouldn't it all reflect or radiate?
I assume receivers are high impedance and don't consume energy so the terminations are really needed to consume the energy. Is it the wrong way to think about it?