Net ordering for timing and wiring optimization

A methodology which allows a package designer to totally optimize a package based on timing and wiring requirements, within one integrated tool, is discussed. If all nets are optimized for timing, both critical and noncritical, then the package is not optimized from a wirability point of view. If all nets are optimized for wirability, then the package is not optimized from a timing perspective. If timing critical nets are optimised for timing and nontiming critical nets are optimized for wirability, then one has an optimized system. The authors discuss how the use of innovative net typing and pin ordering techniques allows for the maximum optimization of package hardware designs. They also discuss a new approach to automatically apply the same net typing and pin ordering techniques to nets which violate all legal wiring rules and thus cannot be mapped to a wiring rule solution through conventional means