IEICE TRANSACTIONS on Information
Mixed Planar and H-V Over-the-Cell Routing for Standard Cells with Nonuniform Over-the-Cell Routing Capacities
Summary :
This paper presents a three layer over-the-cell (OTC) routing algorithm for standard cells with nonuniform OTC routing capacities in standard cell design. Since the number of available routing tracks on the second metal layer of OTC varies column by column, the proposed OTC routing method can effectively utilize the OTC regions. The proposed router performs two types of OTC routing. For the OTC regions near the channel, it performs planar routing. For the OTC regions far from the channel, it performs H-V routing on the second and third layers. Combining planar and H-V routings, the router can utilize the OTC effectively, that could hardly be achieved by existing algorithms. We also formulate the problem of selecting planar routable nets on the third layer as the maximum weighted planar routable net selection problem with nonuniform routing capacity, and propose an optimal algorithm. Experimental results show that the proposed router produces small height layouts as compared to those produced by the routers based on the existing cell model with uniform OTC routing capacity.
- Publication
- IEICE TRANSACTIONS on Information Vol.E79-D No.10 pp.1419-1430
- Publication Date
- 1996/10/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- Special Section PAPER (Special Issue on Synthesis and Verification of Hardware Design)
- Category
- Lauout Synthesis
Authors
Keyword
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Tetsushi KOIDE, Shin'ichi WAKABAYASHI, Noriyoshi YOSHIDA, "Mixed Planar and H-V Over-the-Cell Routing for Standard Cells with Nonuniform Over-the-Cell Routing Capacities" in IEICE TRANSACTIONS on Information,
vol. E79-D, no. 10, pp. 1419-1430, October 1996, doi: .
Abstract: This paper presents a three layer over-the-cell (OTC) routing algorithm for standard cells with nonuniform OTC routing capacities in standard cell design. Since the number of available routing tracks on the second metal layer of OTC varies column by column, the proposed OTC routing method can effectively utilize the OTC regions. The proposed router performs two types of OTC routing. For the OTC regions near the channel, it performs planar routing. For the OTC regions far from the channel, it performs H-V routing on the second and third layers. Combining planar and H-V routings, the router can utilize the OTC effectively, that could hardly be achieved by existing algorithms. We also formulate the problem of selecting planar routable nets on the third layer as the maximum weighted planar routable net selection problem with nonuniform routing capacity, and propose an optimal algorithm. Experimental results show that the proposed router produces small height layouts as compared to those produced by the routers based on the existing cell model with uniform OTC routing capacity.
URL: https://global.ieice.org/en_transactions/information/10.1587/e79-d_10_1419/_p
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@ARTICLE{e79-d_10_1419,
author={Tetsushi KOIDE, Shin'ichi WAKABAYASHI, Noriyoshi YOSHIDA, },
journal={IEICE TRANSACTIONS on Information},
title={Mixed Planar and H-V Over-the-Cell Routing for Standard Cells with Nonuniform Over-the-Cell Routing Capacities},
year={1996},
volume={E79-D},
number={10},
pages={1419-1430},
abstract={This paper presents a three layer over-the-cell (OTC) routing algorithm for standard cells with nonuniform OTC routing capacities in standard cell design. Since the number of available routing tracks on the second metal layer of OTC varies column by column, the proposed OTC routing method can effectively utilize the OTC regions. The proposed router performs two types of OTC routing. For the OTC regions near the channel, it performs planar routing. For the OTC regions far from the channel, it performs H-V routing on the second and third layers. Combining planar and H-V routings, the router can utilize the OTC effectively, that could hardly be achieved by existing algorithms. We also formulate the problem of selecting planar routable nets on the third layer as the maximum weighted planar routable net selection problem with nonuniform routing capacity, and propose an optimal algorithm. Experimental results show that the proposed router produces small height layouts as compared to those produced by the routers based on the existing cell model with uniform OTC routing capacity.},
keywords={},
doi={},
ISSN={},
month={October},}
Copy
TY - JOUR
TI - Mixed Planar and H-V Over-the-Cell Routing for Standard Cells with Nonuniform Over-the-Cell Routing Capacities
T2 - IEICE TRANSACTIONS on Information
SP - 1419
EP - 1430
AU - Tetsushi KOIDE
AU - Shin'ichi WAKABAYASHI
AU - Noriyoshi YOSHIDA
PY - 1996
DO -
JO - IEICE TRANSACTIONS on Information
SN -
VL - E79-D
IS - 10
JA - IEICE TRANSACTIONS on Information
Y1 - October 1996
AB - This paper presents a three layer over-the-cell (OTC) routing algorithm for standard cells with nonuniform OTC routing capacities in standard cell design. Since the number of available routing tracks on the second metal layer of OTC varies column by column, the proposed OTC routing method can effectively utilize the OTC regions. The proposed router performs two types of OTC routing. For the OTC regions near the channel, it performs planar routing. For the OTC regions far from the channel, it performs H-V routing on the second and third layers. Combining planar and H-V routings, the router can utilize the OTC effectively, that could hardly be achieved by existing algorithms. We also formulate the problem of selecting planar routable nets on the third layer as the maximum weighted planar routable net selection problem with nonuniform routing capacity, and propose an optimal algorithm. Experimental results show that the proposed router produces small height layouts as compared to those produced by the routers based on the existing cell model with uniform OTC routing capacity.
ER -
English
