RE: [oc] Power Calculations in ASIC

["Illan Glasner" <iglasner@zumanetworks.com>]

   Hi,

           to make it even more clear notice the word factor I used as indeed you need as I mention to get the "factor" from your vendor 

this formula only come to show those that are not familar with and never design Asic what to look for and to see an example of kind of value to expect.

I cant say I see nor bad nor good in this as it is only an exmaple, should I next time write 

> for logic gate:
>
> XuW/Gate/MHz 
>
> for memories and again it depend but to start with :
>
> The current consumption ranges from Y1mA/MHz to Y2mA/MHz .

????

will this make it more clear ? I for one don;t think so.

but maybe you belive better to leave it with X,Y1,Y2 ?

have a nice day

   Illan



-----Original Message-----
From: Rudolf Usselmann [mailto:rudi@asics.ws]
Sent: Friday, July 05, 2002 6:23 PM
To: cores@opencores.org
Subject: Re: [oc] Power Calculations in ASIC


On Saturday 06 July 2002 06:42 am, Illan Glasner wrote:
> RRK Hi,
>
>         For general estimation tho' it depend on verius of thing and you
> should get the "factors" from the vendor you work with, but for general
> feeling you can use :
>
> for logic gate:
>
> 0.33uW/Gate/MHz (3.3V)
>
> for memories and again it depend but to start with :
>
> The current consumption ranges from 0.09mA/MHz to 0.5mA/MHz .
>
> have a nice day
>
>    Illan


Sorry, but this is VERY BAD advice !  Even though your formulas
are correct, you assume that his typical gate power is 0.33uw per
gate per MHz. The power consumption depends on the technology
and on the gate size. Taking some random number doesn't help
anybody.

Regards,
rudi


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