Magic Blue Smoke

Archive for August 2007

 

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 set_retention gated_retention -domain IGATED_DOMAIN -retention_power_net VDD -retention_ground_net […]

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Simulating Retention Behaviour

In my earlier posts we discussed retention mechanisms. Today lets look at how to simulate this at RTL Level. As we all know, today MV Simulation can be accomplished using some standard power formats such as UPF/CPF. Since some of these are not in full production, I quite often get this question : “How do […]

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Retention Mechanisms used in a Power Gated Design (Cont’d)

In the last 2 posts, we discussed how retentions cells look like and what are the advantages/disadvantages. Since most of the designs do have memories and they tend to be shut-down, how is the state of memory retained ? We cannot reload the data from external memory into the local memory. Today let’s see how […]

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