---
# System prepended metadata

title: IR-drop Analysis
tags: [Digital IC Design]

---

# IR-drop Analysis
###### tags: `Digital IC Design`
[回到主頁面](https://hackmd.io/@derek8955/BkK2Nb5Jo/https%3A%2F%2Fhackmd.io%2FdpcBlBL8TlShpQ-wSi9Quw)

`Process Node : TSMC_90GUTM`

1. Setting Environment

  - #> mkdir power_log
做 IR drop 分析時會產生很多檔案

  - #> innovus
restore design
File name: DBS/final

  - Post Simulation
產出波形檔

2. Static Power Analysis

  - Power → Power Analysis → Setup
Click OK

  - Power → Power Analysis → Run

|![](https://i.imgur.com/Wm2ti7E.png)|
|:---:|
> Dominant Frequency: design frequency
> Scope: testbentch module name/instantiation module name

|![](https://i.imgur.com/hhhmO5Y.png)|
|:---:|
|Terminal 顯示 power 數值|

3. Create Power Grid Library

  - Power → Rail Analysis → Set PG Library Mode

|![](https://i.imgur.com/6OZGvmu.png)|
|:---:|
> Filler Cell Names: FILL1 FILL16 FILL2 FILL32 FILL4 FILL64 FILL8
> Extraction tech file: */SOCE/Firelce/icecaps.tch
> LEF Layermap: */SOCE/Firelce/lef.layermap.libgen
> Voltage: 該製成的 core VDD

  - Power → Rail Analysis → Generate PG Library

|![](https://i.imgur.com/NgOXfsw.png)|
|:---|

 - Power → Rail Analysis → Set PG Library Mode

|![](https://i.imgur.com/Pbidw7D.png)|
|:---|

 - Power → Rail Analysis → Generate PG Library

|![](https://i.imgur.com/NgOXfsw.png)|
|:---|

4. Rail Analysis

 - Power → Rail Analysis → Setup Rail Analysis

|![](https://i.imgur.com/50FhrF5.png)|
|:---:|

 - Power → Rail Analysis → Run Rail Analysis

|![](https://i.imgur.com/H56CFDE.png)|
|:---:|

click create → Net Name: VDD → Fetch → Save → CHIP_VDD.pp
click create → Net Name: VSS → Fetch → Save → CHIP_VSS.pp
|![](https://i.imgur.com/VD4ultC.png)|
|:---:|

|![](https://i.imgur.com/P82sKao.png)|
|:---|

> Threshold: 5% of core VDD

5. Power IR-drop Result

 - Power → Report → Power Rail Result


|![](https://i.imgur.com/YR5TwPy.png)|
|:---:|

勾選 Auto Aplly for Color Scale

Click DB Setup
|![](https://i.imgur.com/jiEuwUi.png)|
|:---:|

|![](https://i.imgur.com/an5gSTn.png)|
|:---:|

Click Result Browser