The present invention relates to electronic integrated circuits (ICs) that
retain identical functionality with better performance or lower power
dissipation under RAM and hard-wire ROM fabrication options, without the
need to alter transistor layout within the IC. An integrated circuit (IC)
comprising: a plurality of transistors; and a first selectable
fabrication option comprised of a user configurable memory circuit; and a
second selectable fabrication option comprised of a hard-wired circuit in
lieu of said user configurable memory circuit; wherein, the IC
functionality and performance is determined by the configuration memory
data in the first fabrication option, and wherein the identical
configuration is hard-wired in the second fabrication option without
altering the location of transistors within the IC. Such a programmable
to hard-wire conversion provides a significant IC cost reduction,
performance improvement and power dissipation reduction at minimal NRE
cost and improved reliability.