Electrical computers and digital processing systems: memory – Storage accessing and control – Access timing
Reexamination Certificate
2005-04-05
2005-04-05
Elmore, Reba I. (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Access timing
C711S154000
Reexamination Certificate
active
06877078
ABSTRACT:
An information processing system which self-detects a change in the actual performance of memory elements due to mounting positions, change in environment, and aging changes to enable the memory elements to stably operate at the highest possible performance without shutting down the system. For implementing an optimal memory access for each of memory elements mounted in a memory unit, a memory controller is provided with a memory timing table which stores operation timings corresponding to the respective memory elements. The timing table is updated in response to an instruction from an apparatus for monitoring the memory operation, and the updated table is applied to a processing request after the update instruction. The apparatus for monitoring the memory operation includes an environmental sensor disposed around the memory elements, a counter for accumulating error information which is generated each time the memory unit is accessed, and so on.
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Fujiwara Hirokatsu
Mita Kimiko
Antonelli Terry Stout & Kraus LLP
Elmore Reba I.
Hitachi , Ltd.
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