Method and/or apparatus for training DQS strobe gating

Details Method and/or apparatus for training DQS strobe gating Method and/or apparatus for training DQS strobe gating

2007-05-08

2007-05-08

Dinh, Son (Department: 2824)

Static information storage and retrieval

Read/write circuit

Signals

C365S194000, C365S233100

Reexamination Certificate

active

11173529

ABSTRACT:
A method for calibrating read data strobe gating including the steps of: (A) performing a coarse timing adjustment configured to determine a coarse delay setting that produces invalid data, (B) performing a medium timing adjustment configured to adjust a medium delay setting and the coarse delay setting until valid data is detected, (C) performing a fine timing adjustment configured to adjust the medium delay setting and a fine delay setting until valid data is detected and (D) adding one-half cycle to a gating delay determined by the coarse, the medium and the fine delay settings.

REFERENCES:
patent: 6600681 (2003-07-01), Korger et al.
patent: 6680866 (2004-01-01), Kajimoto
patent: 6715096 (2004-03-01), Kuge
patent: 7057934 (2006-06-01), Krishnamachari et al.
patent: 2004/0066870 (2004-04-01), Gabara et al.
patent: 2007/0008791 (2007-01-01), Butt et al.

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