On Wed, Feb 18, 2004 at 01:14:19PM -0800, Marko Pavlin (doma) wrote:
> I know MSP430, but... OK, what about new LPC2100 from philips? It's ARM
> TDMI7 and draws 10mA at 50MHz core clk, at 1MHz would be 0,2mA, right? Or
> not?
LPC2100:
30mA at 60MHz and about 55MIPS (the flash is 128bit wide, but runs at 20MHz
only, you do not reach the theoretical 60MIPS of the arm core)
Dont know what it needs in the idle mode or with lower clock, but I guess it
is higher than 1,2mA. At last the oscilator needs 3-5mA
(try ask the people in the lpc2100 mailinglist:
groups.yahoo.com search for lpc2100)
> My calculation is sensor error correction with PWL method with n nodes,
> which requires n dimensional matrix multiplication. In case I wuold like
> 1000 rdgs/s I need about 700kIPS.
0.7MIPS, the msp430 is fast enough for this and can live with your 1.2mA. I
doubt that any other controller is able to run with that low current (and do
some work). The lpc2100 is overkill for only 0,7MIPS :-). The reason why the
msp430 need so less current is: it has oscillators that are designed
to need very low power, the built in DCO (RC osci, you do not need quarzes)
need only 0,2mA; the 32kHz osci 1,2uA
> All electronics except MCU (A/D, HART, sensor itself and 4...20mA D/A) runs
> on 2,4mA. I have 1,2mA for MCU to have 2-wire transducer.
Matthias
--
Author: Matthias Weingart
INET: [EMAIL PROTECTED]
Fat City Hosting, San Diego, California -- http://www.fatcity.com
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB CHIPDIR-L
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
