Lpc2000

I am not trying to pick a fight.  I am pointing out that your
information in the data sheet is of no value to an engineer.  I have
adequate information from OKI which you may not have access to since
OKI is unlikely to provide you with support.  

My main concern is that when I asked *you* for more information,
instead of getting that information, I got noise.  I do not understand
what you are saying below, since in part, it *is* mainly defensive and
not responsive.  Regardless of what is in the OKI data sheet or anyone
else's data sheet, I am looking for information on the Philips parts. 

At the end of your message you mentioned several current figures, but
I don't know what these currents are.  If your MCU is running a
realistic program that is hitting both Flash and RAM and lets just say
the UART is running at 38.4 kbps both xmit an rcv, can you give a typ
and max current figure for the CPU core 1.8 volt supply?  

BTW, in this case Watts are irrelevant because I am trying to size my
power supply which will work equally well at 1.8 volts or 2.5 volts. 
The total power consumption may be a factor in battery life, but this
is pretty much swamped out by the DSP on our board.  I am just trying
to figure out if I need a 100 mA, 250mA or 500 mA regulator.  Size is
important, so I don't want to to use a part any larger than I have
to. 



--- In lpc2000@yahoogroups.com, "philips_apps" <philips_apps@y...>
wrote:
> OK,
> 
> here we go, let's go OKI. Let's just assume our device follows the
> ratio between current used for core and current used for I/O as the
> OKI device, let's compare.
> 
> The OKI 674001 series is specified with typical 40 mA running @ 33
MHz
> while I/O current is typical 18 mA @ 33 MHz. So I would consider the
> core current to be MUCH more significant than the I/O current.
> 
> May be I missed something in the OKI Manual but what is running
while
> the "typical" power consumption for I/O is measured? One timer, all
> timers, one serial interface, all serial interfaces...???
> 
> My point being, the typical power comsumption of the OKI device at
33
> MHz is higher than the LPC2106 at 60 MHz and whether it is specified
> in more detail than the LPC2000 devices, granted we have work to do
> but to make a qualified decision which one is better in power
> comsumption the data is there.
> 
> The typical for the 675001 at 60 MHz is much higher (75 mA) than
that
> of the LPC2124 @ 60 MHz.
> 
> And we are only talking mA not even Volts. Taking the Volts into
> account, 2.5V * 75 mA typical versus 1.8V * 50 mA typical makes a
nice
> factor of 2.   Approx. 190 mW versus 90 mW
> 
> If you think you need to go for the great OKI device because of a
more
> detailled (but much higher) power spec, I won't be able to stop
you. 
> 
> Sorry for being a little defensive here, Robert
> 
> Hint: The power supply for your board is highly depending on your
I/O
> drive requirements. Add to those worst case I/O requirements 50 mA
for
> the micro at full speed and you will do fine.If you want to make it
> bullet proof at -40C, and running the micro at 2V insteadof 1.8V,
add
> 70 mA instead of 50 mA