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Cadence 仿真驱动版图绘制教程
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更新于2023-03-16
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Cadence icadvm18.1和ic6.18的仿真驱动版图绘制教程,包括相关的PDK的使用
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Simulation Driven Routing
Rapid Adoption Kit (RAK)
Product Version: ICADVM18.1.83
November 2018
Learn more at Cadence Support Portal - https://support.cadence.com
© 2018 Cadence Design Systems, Inc. All rights reserved worldwide. Page 2
Copyright Statement
© 2018 Cadence Design Systems, Inc. All rights reserved worldwide. Cadence and the Cadence logo are
registered trademarks of Cadence Design Systems, Inc. All others are the property of their respective
holders.
Simulation Driven Routing (RAK)
Learn more at Cadence Support Portal - https://support.cadence.com
© 2018 Cadence Design Systems, Inc. All rights reserved worldwide. Page 3
Contents
Purpose ....................................................................................................................... 4
Audience ...................................................................................................................... 4
Terms .......................................................................................................................... 4
Interactive Router Bindkeys and Legends ................................................................... 4
Overview ...................................................................................................................... 5
SDR Flow .................................................................................................................... 6
Before You Begin......................................................................................................... 7
Module -1 Overview of SDR features .......................................................................... 8
Lab 1: Source/Sinks Map ......................................................................................... 9
Lab 2: Routing the net outp .................................................................................... 12
Lab 3: Check the routed net outp ........................................................................... 34
Module - 2 Routing with Tapering .............................................................................. 36
Lab 1: Route the net outm ...................................................................................... 36
Lab 2: Check the routed net outm .......................................................................... 41
Module - 3 Controlling the Twig generation ............................................................... 42
Lab 1: Route net net044 ......................................................................................... 42
Lab 2: Check the routed net net044 ....................................................................... 53
Module - 4 Fixing violations ....................................................................................... 54
Lab 1: Identifying and fixing violations .................................................................... 54
Summary ................................................................................................................... 67
Support ...................................................................................................................... 67
Feedback ................................................................................................................... 67
Simulation Driven Routing (RAK)
Learn more at Cadence Support Portal - https://support.cadence.com
© 2018 Cadence Design Systems, Inc. All rights reserved worldwide. Page 4
Purpose
The purpose of this RAK is to guide you through the following basic commands of
Simulation Driven Routing (SDR):
• Current distribution visualization
• Current estimation based on simulation
• Auto-wire width/vias sizing
• Auto-twig connection to devices
The scope of this RAK is solely intended for SDR usage and not dataset generation from
simulation or for ICT file creation for the extractor.
Audience
This document is intended for layout engineers working in Virtuoso EXL and for those
who want to promote SDR capabilities in a layout design team.
Terms
Terms and Acronyms
Definitions
SDR
Virtuoso Simulation Driven Routing
ADE
Analog Design Environment
EAD
Electrically Aware Design
EM
Electro Migration
LMB
Left Mouse Button
MMB
Middle Mouse Button
RMB
Right Mouse Button
Interactive Router Bindkeys and Legends
Terms and Acronyms
Definitions
Shift + Mouse Wheel click
Cycle Current Estimation
= (increase) / - (decrease)
Twig Layer controls. Layer Up/Down
{
Cycle Auto Twig Mode
t
Toggle Taper Mode
Blue Circle
Connected Pin
Yellow Circle
Current Contributor
Simulation Driven Routing (RAK)
Learn more at Cadence Support Portal - https://support.cadence.com
© 2018 Cadence Design Systems, Inc. All rights reserved worldwide. Page 5
Overview
Virtuoso Simulation Driven Routing (SDR) is a step towards "correct by construction"
routing driven by electrical requirements. It provides an environment to consider the
current density and maximum resistance design rules during interactive routing. It is a
solution where you take into consideration the current information and automatically
resize wires and vias during interactive routing.
Electromigration (EM) has a major impact on IC reliability and lifespan, a long-term
concern for automotive, aerospace, and medical IC providers. EM has been an increasing
problem and has become a challenge for the entire microelectronics industry as we move
from higher to lower process nodes.
SDR uses the electrical information derived from circuit simulation to drive optimal routing
widths in layout implementation while maintaining EM compliance.
The key features of Virtuoso® simulation-driven routing are as follows:
• Visualize the current distribution per net.
• Control simulation-driven routing to calculate the current according to the net
topology
• Auto-size wires and vias according to the estimated current.
• Auto-connect devices according to the estimated current.
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