H - Electricity – 03 – K
Patent
H - Electricity
03
K
H03K 19/0175 (2006.01) H03K 19/0185 (2006.01) H03K 19/173 (2006.01)
Patent
CA 2038162
A structure especially useful in a configurable logic array includes a plurality of conductive interconnect lines located along the perimeter of a logic array chip. Lines running from exterior pins or pads can be used by a programmable interconnect circuit to control signals applied to these interconnect lines. In particular, both the signal and the complement of the signal can be used by the programmable interconnect to control application of a supply voltage to an interconnect line. A second supply voltage is applied through a resistor to the interconnect line with the result that the interconnect line will carry a logical signal representing a logical function, for example AND, of a selected set of input signals or their complements. Lines running from points interior to the configurable logic array chip may also contribute to the signal generated on an interconnect line. In one embodiment, bidirectional programmable interconnect circuits allow the input pins to function as either input or output pins. An application of the decoder circuit is described for use with a latch as a data/address demultiplexer.
Carter William S.
Duong Khue
Erickson Charles R.
Freeman Ross H.
Hsieh Hung-Cheng
Smart & Biggar
Xilinx Inc.
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