Coded data generation or conversion – Digital code to digital code converters – Parallel to serial
Reexamination Certificate
2005-11-29
2005-11-29
Jeanpierre, Peguy (Department: 2819)
Coded data generation or conversion
Digital code to digital code converters
Parallel to serial
C341S100000
Reexamination Certificate
active
06970117
ABSTRACT:
A serial data interface for a programmable logic device includes a receiver that deserializes a plurality of channels of received serial data using a recovered clock signal or a phase-aligned received clock signal. Byte boundaries are initially assigned, perhaps arbitrarily, and the deserialized signal is sent to the programmable logic core of the programmable logic device. Programmable logic in the core monitors the byte boundaries on each channel based on the criteria, including any user-defined parameters, programmed into the logic. If a boundary misalignment is detected, a signal is send from the core to bit-slipping circuitry on that channel of the interface to adjust the boundary. The signal could instruct the bit-slipping circuitry to adjust the boundary by the number of bits needed to correct the alignment. Alternatively, the bit-slipping circuitry could operate iteratively, adjusting the boundary by one bit, each cycle, until the signal stops indicating misalignment.
REFERENCES:
patent: 5689195 (1997-11-01), Cliff et al.
patent: 6724328 (2004-04-01), Lui et al.
patent: 2001/0033188 (2001-10-01), Aung et al.
patent: 2002/0190751 (2002-12-01), Lee et al.
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Chan Vinson
Kabani Malik
Lam John
Lee Chong H.
Lui Henry Y.
Altera Corporation
Fish & Neave IP Group of Ropes & Gray LLP
Ingerman Jeffrey H.
Jeanpierre Peguy
Lauture Joseph
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