I have a 4-layer board with the micro and sdram on opposite sides, the ram signals are short, but I still want to terminate them (I can test the board later and determine if I really need termination), the problem now is that I can't use series termination because traces are running under the micro and ram:
So what other choices do I have ? I've been reading an app note and it mentions parallel termination at the destination, which would be perfect for my situation, but it says signals should be pulled up, and another one says they should be pulled down, so which way is it ? does it matter ? and how do I determine this resistor ? and which lines need termination ? clocks and data/address ? what about control signals ?