Port assignment in hierarchical designs by abstracting macro...

Details Port assignment in hierarchical designs by abstracting macro... Port assignment in hierarchical designs by abstracting macro...

2011-06-14

2011-06-14

Kik, Phallaka (Department: 2825)

Computer-aided design and analysis of circuits and semiconductor

Integrated circuit design processing

Physical design processing

C716S129000, C716S130000

Reexamination Certificate

active

07962877

ABSTRACT:
A method to reduce the problem complexity maintains a relatively high quality port assignment by abstracting local connections in the macro when performing the port assignment. This is done for netlength, congestion as well as timing. The internal netlist of the macro is abstracted in such a way that the optimization of the external interconnect can be done in an efficient manner. Three levels of abstractions are described. A first level optimizes the top level interconnect, a second level optimizes the top level and macro interconnects, while a third level optimizes the top level timing.

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Jurjen Westra et al., Towards Integration of Quadratic Placement and Pin Assignment; Proceedings of the IEEE Computer Society Annual Symposium on VLSI; New Frontiers in VLSI Design; Copyright 2005 IEEE.

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