Multiple processor system and method including multiple memory hub modules
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United States of America Patent
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Jan 18, 2011
Grant Date -
Nov 12, 2009
app pub date -
Jul 20, 2009
filing date -
Aug 28, 2003
priority date (Note) -
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Abstract
A processor-based electronic system includes several memory modules arranged in first and second ranks. The memory modules in the first rank are directly accessed by any of several processors, and the memory modules in the second rank are accessed by the processors through the memory modules in the first rank. The data bandwidth between the processors and the memory modules in the second rank is varied by varying the number of memory modules in the first rank that are used to access the memory module in the second set. Each of the memory modules includes several memory devices coupled to a memory hub. The memory hub includes a memory controller coupled to each memory device, a link interface coupled to a respective processor or memory module, and a cross bar switch coupling any of the memory controllers to any of the link interfaces.
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