Adjustable interface buffer circuit between a programmable logic device and a dedicated device
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United States of America Patent
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Sep 13, 2011
Grant Date -
Mar 27, 2008
app pub date -
Sep 21, 2006
filing date -
Sep 21, 2006
priority date (Note) -
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Abstract
An integrated circuit includes a programmable logic device, a dedicated device, and an interface circuit between the two. The interface circuit can be easily modified to accommodate the different interface I/O demands of various dedicated devices that may be embedded into the integrated circuit. In one embodiment, the interface circuit may be implemented using a plurality of mask programmable uni-directional interface buffer circuits. The direction of any desired number of the interface buffer circuits can be reversed based on the needs of a desired dedicated device by re-routing the conductors in the interface buffer circuits in a single metal layer of the integrated circuit. In another embodiment, the interface circuit may be implemented using a hardware configurable bi-directional interface buffer circuit.
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