Electrical computers and digital processing systems: memory – Storage accessing and control – Specific memory composition
Reexamination Certificate
2011-04-12
2011-04-12
Bragdon, Reginald G (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Specific memory composition
C711SE12007
Reexamination Certificate
active
07925823
ABSTRACT:
A mechanism is provided to reuse functional data buffers. With Extreme Data Rate (XDR™) Dynamic Random Access Memory (DRAM), test patterns are employed to dynamically calibrate data with the clock. To perform this task, data buffers are employed to store data and commands for the calibration patterns. However, there are different procedures and requirements for transmission and reception calibrations. Hence, to reduce the amount of hardware needed to perform transmission and reception calibrations, the data buffers employ additional front end circuitry to reuse the buffers for both tasks.
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patent: 6587804 (2003-07-01), Johnson et al.
patent: 7047374 (2006-05-01), Sah et al.
patent: 7155568 (2006-12-01), Richard et al.
patent: 2006/0106975 (2006-05-01), Bellows et al.
Bellows Mark David
Ganfield Paul Allen
Haselhorst Kent Harold
Ozguner Tolga
Bragdon Reginald G
International Business Machines - Corporation
Lammes Francis
Ruiz Aracelis
Tatpis Matthew B.
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