The Au1000, Au1500 and Au1100 (Au1x00) processors each feature an integrated, high-performance SDRAM controller for connecting to 32-bit wide external SDRAM memory. This paper describes the performance characteristics of the SDRAM controller and techniques for optimizing SDRAM performance. The SDRAM controller on an Au1x00 processor supports three ranks of 32-bit wide SDRAM. A rank is a physical grouping of SDRAM devices, all tied to the same chip select.
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