Lpc2000

Hi,

the difference is that 60-70 uAs is power down, keeping all the
information of the registers and 32k SRAM intact while the lower
values is RTC only from Vbat and the information from SRAM and
registers is lost but usually you can save the stuff into the Flash.

Now about MSP430 or LPC2138, well if you can deal with 62k Flash, 2K
SRAM and a max of 16 MHz which afaik is the max. configuration you can
get on a MSP430 today, then it is lower power in power down. You will
probably pay a similar price for for much lower performance and 1/8 of
the memory device.

So in a nutshell, you get a lot more for your money using the LPC2138
but the MSP430 has low power modes being most of the time not active
that are lower than those of the LPCs.

Hope this helps, Bob

--- In lpc2000@yahoogroups.com, "jlowryspectrum" <jlowry@s...> wrote:
>
> My last project used an LPC2138.  My next project is battery powered 
> and must be able to sleep then wake up each hour.  From reading various 
> posts it looks like the LPC takes about 60-70uA when operating in deep 
> sleep with RTC enabled.
> 
> Anyone have experience with MSP430.  First glance thru their docs 
> indicate when in LPM3 (interrupts and timer enabled) it draws 2uA.  Is 
> there something else I should be aware?
> 
> Jeff.
>