DRAM Controllers for System Designers

A worth reading article outlining basic blocks of a DRAM controller.

https://www.altera.com/solutions/technology/system-design/articles/_2012/dram-controller-system-designer.html

The following two figures were borrowed from 

https://www.synopsys.com/cgi-bin/proto/pdfdla/pdfr1.cgi?file=optimizing-ddr-efficiency-p1-wp.pdf