Synchronization and order detection in a memory system

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United States of America Patent

PATENT NO 9430418
APP PUB NO 20140281325A1
SERIAL NO

13835485

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Abstract

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Embodiments relate to out-of-synchronization detection and out-of-order detection in a memory system. One aspect is a system that includes a plurality of channels, each providing communication with a memory buffer chip and a plurality of memory devices. A memory control unit is coupled to the plurality of channels. The memory control unit is configured to perform a method that includes receiving frames on two or more of the channels. The memory control unit identifies alignment logic input in each of the received frames and generates a summarized input to alignment logic for each of the channels of the received frames based on the alignment logic input. The memory control unit adjusts a timing alignment based on a skew value per channel. Each of the timing adjusted summarized inputs is compared. Based on a mismatch between at least two of the timing adjusted summarized inputs, a miscompare signal is asserted.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dodson, John S Austin, US 45 409
Gilda, Glenn D Binghamton, US 26 269
Meaney, Patrick J Poughkeepsie, US 124 1373
Michael, Brad W Cedar Park, US 35 446
Powell, Stephen J Austin, US 45 252
Retter, Eric E Austin, US 61 1125
Van, Huben Gary A Poughkeepsie, US 51 1313

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