DDR2 LAYOUTTN-47-01 DDR2 DESIGN GUIDE FOR TWO-DIMM SYSTEMS Overview Technical Note DDR2-533 Memory Design Guide for Two-DIMM Unbuffered Systems Overview DDR2 memory busses vary depending on the intended market for the finished product. Some products must support four or more registered DIMMs, while some are point-topoint topologies. This document focuses on solutions requiring two unbuffered DIMMs operating at a data rate of 533 megabits per second (Mb/s) and is intended to assist board designers with the development and implementation of their products. The document consists of two sections. The first section uses data gathered from a chipset and motherboard designed by Micron to provide a set of board-design rules. These rules are meant to be a starting point for a board design. The second sectio……