This document discusses the implementation of an SDRAM-based memory system using the MPC106. To locate any published errata or updates for this document, refer to the website at http://www.motorola.com/SPS/PowerPC/. Note: High-speed design systems operate at 100 MHz or less. To achieve such a high speed, it necessary to consider each source of possible problems and aggressively pursue solutions. An accurate simulation of the board, taking into account the trace lengths and trace separations, is essential. For designers who are considering lower-speed memory systems, it is possible to ignore some of these considerations.