Lpc2000

> -----Original Message-----
> From: redsp@... [mailto:redsp@...]
> Sent: Friday, March 19, 2004 6:48 AM
> To: lpc2000@yahoogroups.com
> Subject: Is this ever gonna stop ? / Re: [lpc2000] Re:
> Summary of Power
> numbers in active
>
>
> --- In lpc2000@yahoogroups.com, "microbit" wrote:
> > This thread is starting to annoy me (and maybe others too)
>
> See what I mean... When you are persistent, it ticks off some people.
> Some people just don't get it.
>
> micro, did you notice that Robert "thanked" me for my persistence?
> That was the only reason that I continued to ask further. If he does
> not like the question or does not want to answer, I think he can
> decide that for himself and respond appropriately.
>
> I am not here to "stir things up". I think I am making a valid point
> that the information that he is willing to provide to us here, should
> be available to everyone considering the chip. Not many users will
> find their way to this group. Also, not everyone wants to build a
> board just so they can measure the current. I don't think very many
> eval boards provide for current measurement points.
Wrong,
my experience is, that unless the board was designed without 'low-power'
in mind at all (explicitly for use in industrial, off-line powered apps f.ex.),
they are provisioned for current draw measurements (jumper, or zero-ohm resistor etc.)

All Atmel ARM7(i.e. "AT91EBxx")-based boards have this,
as well as ARM9-based. Same goes for every generation of AVR(8-bit MCU)
prototyping boards; STK100/200/300/500. All these MCUs are termed 'low power',
and Atmel is certainly not unique in this respect.
I could list at least a dozen manufacturers w. this option on altogether >100
devkits/protoboards. In short, I would call this a 'common' feature -
what about LPC21xx kits from Keil, IAR, Nohau, Olimex ...??

Rgds:
Morten Larsen

>
> I do agree about the support. It is very nice to be able to ask
> questions and get them answered quickly. Thanks Robert and the others
> from Philips. You are doing a good job here.
>
> But like I said, I need the larger 144 pin chip in a smaller package,
> so I am not too worried about the data sheets for myself. I was just
> trying to help. I won't bother you any more... :)
>
>
>
>
>
>
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Larsen, Morten ActeNO wrote:

> devkits/protoboards. In short, I would call this a 'common' feature -
> what about LPC21xx kits from Keil, IAR, Nohau, Olimex ...??

My Keil MCB2100 has jumpers in the power rails just before they go into 
the CPU, which one can detach and replace with a sensitive ammeter, for 
that kind of measurement.

ABS

Same is true for Ashling EVBA7 board

--- In lpc2000@yahoogroups.com, Alaric B Snell <alaric@a...> wrote:
> Larsen, Morten ActeNO wrote:
> 
> > devkits/protoboards. In short, I would call this a 'common' 
feature -
> > what about LPC21xx kits from Keil, IAR, Nohau, Olimex ...??
> 
> My Keil MCB2100 has jumpers in the power rails just before they go 
into 
> the CPU, which one can detach and replace with a sensitive ammeter, 
for 

> that kind of measurement.
> 
> ABS

Watch out for the Heisenberg uncertainty principle (you change what 
you measure): sensitive ammeters work by introducing, and measuring a 
voltage drop.

This voltage drop will affect your measurement (reducing the device 
current). Either this voltage drop needs to be compensated for, or 
avoided by using clip-on type of ammeters that measure the magnetic 
field caused by the device-current flowing through a conductor wired 
across the power-jumpers. Extech makes very sensitive (0.1mA and 1mA 
resolution) clip on meters. Search for Extech modell No: EX-380942 
for example.

GM

--- In lpc2000@yahoogroups.com, "lpc2100" <lpc2100@y...> wrote:
> Same is true for Ashling EVBA7 board
> 
> --- In lpc2000@yahoogroups.com, Alaric B Snell <alaric@a...> wrote:
> > Larsen, Morten ActeNO wrote:
> > 
> > > devkits/protoboards. In short, I would call this a 'common' 
> feature -
> > > what about LPC21xx kits from Keil, IAR, Nohau, Olimex ...??
> > 
> > My Keil MCB2100 has jumpers in the power rails just before they 
go 
> into 
> > the CPU, which one can detach and replace with a sensitive 
ammeter, 

> for 
> > that kind of measurement.
> > 
> > ABS