Core_EDA

# IR analysis

## Reference Flow

## IR drop analysis Background:

You can check "Inside SPICE engine" section of http://10.30.200.21:8088/projects/hongtu-emir/wiki/SPICE_for_lib_and_package (lect07_element_stamping.pdf)

So that you can get a brief idea of Nodal Analysis

200 

## IR drop analysis Basics

 Check IR drop analysis core engine in IR_drop_analysis_and_validation.pptx  Check IR drop analysis code flow in IR_drop_analysis_and_validation2.pptx  Static IR analysis with circuit partition IR_drop_analysis_and_validation3.pptx  xGraph-pGraph structure and flow (by 冯叩倩叩 xgraph_pgraph.pptx

 pGraph construct (By 000 ) node_build.pptx

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## Dynamic IR analysis 

## Chip_Package_Co-Simulation 

## High Performance IR Analysis 

## timing window file (twf)

## Custom Model EMIR (Memory, I0, PAD, IP) 

## Known issues

* Vector-less IR is not tested

* gp and pl will call vector-less IR, but not tested

* If clock is not specified, min clock will selected, but cells do not belong to that clock will not switch (Not align with ref tool)  

* Vector-less flow also accept VCD?

## Project feature list

| | | |

|--|--|--|

| Supply model support for dynamic IR drop analysis | QHH 202010 | supply_model.pptx |

|Circuit partition for static IR  | DTH 202103 | TBD |

|Circuit partition for dynamic IR | DTH 202103 | TBD |

|GSS for static IR  | DTH 202103 | TBD |

## gu class definition

| | |

|--|--|

|guXform|to scale, rotate graphic object|

|guPoint|point graphic object|

|guRect|Rectangle graphic object|

|guTrect|??|

|guTrapz|trapezoid graphic object, only accept four points|

|guPointlist|point list|

|guPolygon|Polygon shape|

|guScanline|to handle concave or convex shape|

|guPolyPath|??|

|guTrapzlist|trapezoid list|

|guGrid|Create point grids within an area, length|

|guBin|Binary search to locate a shape|

|guMask|Shape and, or, not operation|

|guPattern|??|