Lpc2000

I'm trying to measure power consumption and I found out that the LPC2106 at 60Mhz uses 
~50mA. Is everybody seeing the same thing? I'm curious because the datasheet says 30mA 
at 60Mhz in an infinite loop (which what I'm doing). Thanks.

-John G-

John
 
At the risk of sounding like an idiot... (My apologies in advance)
 
Be sure that you are measuring just the CPU's power consumption and the board's.
 
Power supplies are not 100% efficient, particularly linear regulators.   Many of the
demo boards use a 1.8 volt linear regulator for the LPC21XX core voltage.  
 
I am interested in the final results of your measurements.
 
Wayne

jpsg123 <gonzagajohn@...> wrote:
I'm trying to measure power consumption and I found out that the LPC2106 at 60Mhz uses 
~50mA. Is everybody seeing the same thing? I'm curious because the datasheet says 30mA 
at 60Mhz in an infinite loop (which what I'm doing). Thanks.

-John G-


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jpsg123 wrote:

> I'm trying to measure power consumption and I found out that the LPC2106 at 60Mhz uses 
> ~50mA. Is everybody seeing the same thing? I'm curious because the datasheet says 30mA 
> at 60Mhz in an infinite loop (which what I'm doing). Thanks.

Pay close attention to the following:
- How fast is the peripheral bus (divide by 1/2/4)
- Which peripherals are powered on

In my experience, these two items can cause 10's of mA difference.

Ryan

I'm powering the CPU core (1.8) directly from a power supply with a amp meter in series 
and I'm seeing 50mA. FYI.

-John G-

--- In lpc2000@yahoogroups.com, Wayne Radochonski <dharmabum@y...> wrote:
> John
>  
> At the risk of sounding like an idiot... (My apologies in advance)
>  
> Be sure that you are measuring just the CPU's power consumption and the board's.
>  
> Power supplies are not 100% efficient, particularly linear regulators.   Many of the
> demo boards use a 1.8 volt linear regulator for the LPC21XX core voltage.  
>  
> I am interested in the final results of your measurements.
>  
> Wayne
> 
> jpsg123 <gonzagajohn@h...> wrote:
> I'm trying to measure power consumption and I found out that the LPC2106 at 60Mhz 
uses 
> ~50mA. Is everybody seeing the same thing? I'm curious because the datasheet says 
30mA 

> at 60Mhz in an infinite loop (which what I'm doing). Thanks.
> 
> -John G-
> 
> 
> Yahoo! Groups SponsorADVERTISEMENT
> 
> 
> ---------------------------------
> Yahoo! Groups Links
> 
>    To visit your group on the web, go to:
> http://groups.yahoo.com/group/lpc2000/
>   
>    To unsubscribe from this group, send an email to:
> lpc2000-unsubscribe@yahoogroups.com
>   
>    Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. 
> 
> 
> 		
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> SBC Yahoo! - Internet access at a great low price.

The peripherals will draw quite a bit of current and a higher PCLK 
will result in higher peripheral draw.  Reduce the PCLK to as slow as 
you can go, turn off unused peripherals, and you will see a 
significant drop.

Richard


--- In lpc2000@yahoogroups.com, "jpsg123" <gonzagajohn@h...> wrote:
> I'm trying to measure power consumption and I found out that the 
LPC2106 at 60Mhz uses 
> ~50mA. Is everybody seeing the same thing? I'm curious because the 
datasheet says 30mA 

> at 60Mhz in an infinite loop (which what I'm doing). Thanks.
> 
> -John G-