The msp430l092 has a boot loader that can be used to download code from an
SPI flash device.  Dunno if you saw that.  Take a look at page 187 of
http://focus.ti.com/lit/ug/slau321/slau321.pdf for an example setup.

You would have to put your compiled code into the container format specified
and download it into the flash via some other means.

I have not personally tinkered with the 'L092, but I believe both
msp430-jtag and mspdebug can write to ram -- just not necessarily with the
same commands used to write flash.

David

On Fri, Apr 29, 2011 at 01:55:20PM -0400, Przemek Klosowski wrote:
> Did anyone use MSP430L092 0.9V part? it apparently has no flash, so I
> suppose it runs the code out of RAM, which has to be downloaded via
> JTAG---is that correct?  Can the MSPGCC toolchain do that?
> I am interested because it looks that it can be run from a single AA battery.
> 
> BTW, would that be practical to have a controller that would download
> the program on reset from an external flash to the chip? The
> controller wouldn't have to work all the way down to  0.9V because
> presumably the program only has to be downloaded when the battery is
> changed for a new one.
> 
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