Almost everyone knows that the bulk of DRAMs produced end up in desktop and laptop computers just like the one used to write this article. In fact, approximately 90% of all DRAMs produced are used in computers leaving the remaining 10% as square pegs pounded into round holes. An increasing number of SoC designs are requiring an interface to some form of external memory. The modern DDR2 SDRAM offers security of supply, high storage capacity, low cost, and reasonable channel bandwidth but comes with an awkward interface and complicated controller issues.
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Editorial
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