Multi-output look-up table (lut) for use in coarse-grained field-programmable-gate-array (fpga) integrated-circuit (ic) chip

Abstract

A semiconductor integrated-circuit (IC) chip comprises a memory cell including: a latch circuit comprising first and second inverters coupling to each other, a first latch node coupling to an input point of the first inverter and an output point of the second inverter and a second latch node coupling to an input point of the second inverter and an output point of the first inverter; a first N-type MOS transistor having a first terminal coupling to the first latch node, a second terminal coupling to a first output point of the memory cell, and a first gate terminal for controlling coupling between the first latch node and the first output point of the memory cell; a second N-type MOS transistor having a third terminal coupling to the second latch node, a fourth terminal coupling to a second output point of the memory cell, and a second gate terminal for controlling coupling between the second latch node and the second output point of the memory cell; and a P-type MOS transistor having a fifth terminal coupling to the first latch node, a sixth terminal coupling to a third output point of the memory cell, and a third gate terminal for controlling coupling between the first latch node and the third output point of the memory cell.