Placement-based pin optimization method and apparatus for computer-aided circuitdesign

摘要

Soft pin locations in a hybrid paradigm are optimized according to circuit density centers of circuit components coupled to the soft pins. As a result, the soft pins are located closer to components with heavier loads and further from components with lighter loads. Circuit density centers are determined by summing coordinates weighted by circuit loads, including capacitance and resistance, and dividing the summed weighted coordinates by a sum of the weights. To avoid blockage, optimized soft pin locations can be moved to soft block boundaries relative to the optimized locations.