Magic Blue Smoke

Archive for 2007

 

UPF Overview Part I

UPF is a way to represent the Power Intent of a design. It directs all the tools in the flow to interpret the Power Intent in the same way. Before we jump into the details of UPF, let’s try to understand what we mean by Power Intent.

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UPF Introduction

So far my posts have dealt with various power reduction techniques used by designers as well as some of the challenges faced using these techniques in the design flow.

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IR Drop Management Cont’d

Could not write much for last few weeks and would like to complete the IR-Drop series with few good articles today.

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Managing IR Drop Continued

I apologize for not writing as often as I would like, Was quite busy with multiple design flow related activities. Bear with my busy schedule for the next few weeks.

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Managing IR Drop Issues in General

Most common issue faced in any Low Power Design is how can we minimize noise coupling between different rails and between cells in the same power domain. I am planning on discussing these in my next 2 posts.

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DVFS Impacts Timing Closure

I was in discussion with a designer other day on “Impact on performance of the design if the voltage range is not choosen correctly”, today I am going elaborate a bit on this topic.

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Library Modelling for Isolation Cells

I Forgot to add the syntax of Modelling Isolation cells. Thanks Sampath for reminding me on this. Here is one way to model ISOLATION cells

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Voltage/Frequency Scaling Mechanisms

I was in Boston last week attending SNUG and got a chance to interact with many designers and one of the key concerns raised were in understanding the Voltage scaling approach . Planning to take a quick tour on this topic in my next few posts

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How to model Special Cells in libraries?

I have been post-poning explaining about the library requirements for quite sometime. Today let me explain little bit on library modelling of special cells such as

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Simulating Retention behaviour using UPF

Last week, we saw on how to simulate retention flops using $functions as well as using adhoc methods to simulate similar behaviour. We have been hearing a lot about power standards helping us in solving this problem. Here is how UPF can help us in simulating this behaviour

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