Mask-programmable logic devices with programmable gate array sites

Abstract

A mask-programmable logic device that includes programmable gate array sites is provided. The gate array sites contain circuit elements that may be programmed to perform certain logic functions that correct problems associated with implementing a preexisting circuit design in mask-programmable device.

What is claimed is:  
     
         1 . A mask-programmable logic device disposed on an integrated circuit comprising: 
 a plurality of mask-programmable logic regions disposed on a substrate of the integrated circuit;    a plurality of interconnection conductors coupled to the mask-programmable logic regions and disposed above the substrate for interconnecting the mask-programmable logic regions; and    a plurality of gate array sites disposed on the substrate, the gate array sites being programmable to perform at least one function that facilitates implementation of a circuit design on the mask programmable logic device.