DDR interface - SSTL termination
Original DDR or ddr1 does not have on die termination but later faster versions do.   

For plain DDR the recommendation for series termination was either close to the transmitter (controller) or at the middle of the lead in or the trace that came from the transmitter before it splits off to multiple parts.  This is the same for address and data.

Similarly vtt end termination is recommended at the end if the line after the DDR parts for both address and data despite the fact
That data is bi-directional.  For a single point to point DDR it was even recommended to start without vtt termination and then only add if simulation or test demanded it.  

Remember DDR was much slower than today's ddr3/ddr4 speeds.

Here's link to a micron app note about it.  If you're really interested in learning about DDR I'd encourage you to check out their app notes.  They long been a source of good information.