RECONFIGURABLE LOGIC BLOCK, PROGRAMMABLE LOGIC CIRCUIT DEVICE USING THE SAME, AND TECHNOLOGY MAPPING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a reconfigurable logic block, a programmable logic circuit device therewith and a technology mapping method which implement a small device area and a low power consumption.

SOLUTION: A reconfigurable logic block (K-A2LUT) with maximally K inputs (x[0]-x[K-1]) includes: a first lookup table 1 with m inputs (y[0]-y[m-1], where m is smaller than K and y belongs to x); a second lookup table 2 with n inputs (z[0]-z[n-1], where n is smaller than K and z belongs to x); a combinational circuit 3 with p inputs (c[0]-c[p-1], where p is smaller than K and c belongs to x); and a selector 4 for selecting either the first lookup table 1 or the second lookup table 2 in accordance with an output of the combinatorial circuit 3.

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