Input/output circuitry for programmable logic devices
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United States of America Patent
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-
May 1, 2001
Grant Date -
N/A
app pub date -
Mar 24, 2000
filing date -
Oct 16, 1997
priority date (Note) -
In Force
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Importance
Abstract
A programmable logic device has a plurality of conductors extending around its periphery for use in providing at least some of the signals needed for control of input/output ('I/O') pins which are also disposed around the periphery of the device. These control signals may include clock signals, output enable signals, clock enable signals, clear signals, or the like. The conductors that thus extend around the periphery are segmented into plural segments that can either be used independently of one another or programmably stitched together and therefore used together.
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