Table of Contents RedHawk User Manual | ii
ANSYS, Inc.
Command Line Data Import ................................................................................... 3-29
GUI Data Loading ................................................................................................... 3-31
RedHawk Configuration Files ........................................................................................ 3-32
Chapter 4 - Power Calculation, Static IR Drop and EM Analysis
Introduction ........................................................................................................................... 4-33
Power Calculation ................................................................................................................. 4-34
Setup for Vectorless Power Calculation ........................................................................ 4-35
Setting Frequency and Clock Parameters .............................................................. 4-36
Setting the Switching State of Instances and Blocks .............................................. 4-37
Setting the Toggle Rate .......................................................................................... 4-37
Setting Toggle Rate Scaling Parameters ............................................................... 4-39
Using both clock and signal toggle rates in power calculation ............................... 4-41
Setting Extraction Parameters ................................................................................ 4-41
Selecting Power Calculation Methodology ............................................................. 4-42
Specifying Supply Nets ........................................................................................... 4-43
Setting Bus and Hierarchy Delimiter Keywords ...................................................... 4-44
Setting up for Event-Driven (VCD File) Power Calculation ............................................ 4-44
Setting GSR Keywords for Event-driven (VCD) Power Calculation ....................... 4-45
Power Calculation Procedure and Results Evaluation .................................................. 4-48
Power Grid Resistance Extraction ........................................................................................ 4-51
Metal Density Calculation .............................................................................................. 4-51
TCL Command R Extraction .......................................................................................... 4-51
GUI Extraction ............................................................................................................... 4-52
Examining Power/Ground Grid Weakness ........................................................................... 4-52
Defining Pad and Package Parameters ................................................................................ 4-55
Command Line Procedure for Package Modeling ......................................................... 4-55
GUI Procedure for Package Modeling ........................................................................... 4-56
Package Compiler Utility ................................................................................................ 4-56
Running RedHawk-S (Static IR/EM Analysis) ....................................................................... 4-56
Exporting and Importing Results to the Design Database ............................................. 4-58
Exporting a Database ............................................................................................. 4-58
Database Compatibility ........................................................................................... 4-58
Importing a Database ............................................................................................. 4-58
Flexible Memory Caching for Database Reloading ................................................ 4-59
Early Analysis Methodology .................................................................................................. 4-59
Overview ........................................................................................................................ 4-59
Input Data Required ....................................................................................................... 4-60
Early Analysis Flow ........................................................................................................ 4-60
Block Power and Current Assignment .................................................................... 4-60
Creating Decap Cells During BPA .......................................................................... 4-66
Early Stage Decap Estimation ................................................................................ 4-67
Reports Created ............................................................................................................ 4-68
Example Analyses ......................................................................................................... 4-68
Evaluating Results of Static IR Voltage Drop Analysis ......................................................... 4-70
Example Procedure to Fix IR Drop Problems ....................................................................... 4-73
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