Pre-configuration programmability of I/O circuitry
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United States of America Patent
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Feb 26, 2013
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app pub date -
Jan 14, 2011
filing date -
Jan 14, 2011
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Abstract
In one embodiment of the invention, a programmable logic device, such as an FPGA, has programmable I/O circuits that can be programmed into any one of a number of different operating modes before configuration is completed. As such, the same set of I/O circuits and corresponding I/O pads can be used to configure the device using different configuration interfaces having different interface signaling requirements. Such a device may be able to be implemented using fewer I/O pads than conventional devices that employ a different set of I/O pads for each different type of configuration interface supported by the device.
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