Electrical computers and digital data processing systems: input/ – Input/output data processing – Peripheral monitoring
Reexamination Certificate
2008-06-12
2011-11-15
Peyton, Tammara (Department: 2182)
Electrical computers and digital data processing systems: input/
Input/output data processing
Peripheral monitoring
C710S038000, C375S295000, C375S356000, C713S400000, C713S401000
Reexamination Certificate
active
08060665
ABSTRACT:
An integrated circuit input/output interface with empirically determined delay matching is disclosed. In one embodiment, the integrated circuit input/output interface uses empirical information of signal traces coupled to the integrated circuit to adjust a transmit/receive clock of each pin of the interface so as to compensate for delay mismatches caused by differences in signal trace lengths. In one embodiment, values representative of the empirical information are stored for use by the integrated circuit to generate trace-specific signals so as to compensate for delay differences that are at least partially caused by unmatched signal trace lengths. The empirical information, in one embodiment, includes signal flight time of each signal trace, which can be pre-measured or pre-calculated from known signal trace lengths. The empirical information, in another embodiment, includes trace-specific phase offset values calculated from pre-calculated or pre-measured signal flight times or signal trace lengths.
REFERENCES:
patent: 3093805 (1963-06-01), Osifchin et al.
patent: 5554945 (1996-09-01), Lee et al.
patent: 5852640 (1998-12-01), Kliza et al.
patent: 6292903 (2001-09-01), Coteus et al.
patent: 6658732 (2003-12-01), Doberenz
patent: 6816505 (2004-11-01), Sutardja et al.
patent: 6847267 (2005-01-01), Flake et al.
patent: 6867661 (2005-03-01), Dawn et al.
patent: 6998870 (2006-02-01), Gulick et al.
patent: 2005/0213684 (2005-09-01), Flake et al.
Ryu, W.H., et al., “High Frequency Simultaneous Switching Output Noise (SSO) Simulation Methodology for a DDR333/400 Data Interface,” Ansoft High-Speed Design Forum, Jun. 27, 2002.
Best Scott C.
Hampel Craig E.
Morgan & Lewis & Bockius, LLP
Peyton Tammara
Rambus Inc.
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