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The Role of Custom Design in ASIC Chips (2000)
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BibTeX
@MISC{Dally00therole,
author = {William J. Dally and Andrew Chang},
title = {The Role of Custom Design in ASIC Chips},
year = {2000}
}
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Abstract
Custom design, in which the designer controls the physical structure of the chip, can greatly improve the speed, power, and delay of an ASIC chip without affecting design time. Through floorplanning and tiling data paths, the designer places the critical wires first, before the logic is placed. Crafted datapath cells structure wiring at the other end of the spectrum by keeping local wires short enabling the use of minimum sized drivers. Routing the wires first gives early visibility of timing issues, allows the design to be optimized to drive the exact wire load, and enables the use of fast circuit styles. 1 Introduction We have found that the performance of an ASIC can be greatly improved without increasing design time by judiciously employing a number of custom design techniques including floorplanning, prerouting critical signals, tiling datapaths, and generating crafted cells. These techniques all structure the design by routing the critical wires first and then placing the devic...
