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krisi
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re: IBM licenses embedded memory IP
krisi   10/1/2012 9:23:31 PM
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thank you @Bar-Rollin...would anyone be interested in writing a small chapter on this topic for the memory book I am editing? Kris

Paul A. Clayton
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re: IBM licenses embedded memory IP
Paul A. Clayton   10/1/2012 9:06:19 PM
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From http://www.memoir-systems.com/index.php?option=com_content&view=article&id=73&Itemid=472 : "by implementing a variety of techniques such as caching, virtualization, pipelining, and data encoding". What exactly that means is not clear (and the whitepaper does not provide any significant additional information). Address renaming (virtualization) could obviously be used manage bank conflicts. Bank conflicts could also be statistically reduced by _address_ encoding, but it is not clear that such would help worst case behavior even in the presence of other techniques. Pipelining could make temporal multiporting act as physical multiporting. Their term Algorithmic Memory made me think that perhaps they exploited expected access patterns, but that appears not to be the case. The "algorithm" revers to the generation of a memory by algorithmic combination of standard components. The major accomplishment here seems to be in making such transparent to the designer.

krisi
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re: IBM licenses embedded memory IP
krisi   10/1/2012 5:33:23 PM
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How is 4x gain in MOPS accomplished?



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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